Rotation I Presentation
•Download as PPT, PDF•
0 likes•437 views
The document summarizes research on the dechlorination of polychlorinated biphenyl (PCB) congeners by the anaerobic bacterium Dehalococcoides. Key findings include: 1) Dehalococcoides uses PCBs as a terminal electron acceptor and can effectively dechlorinate various PCB mixtures. 2) Experiments showed some PCB congeners (234 CB and 2345 CB) underwent more dechlorination than others (245 CB and 235 CB). 3) Further research is needed to understand congener specificity and identify reductive dehalogenase enzymes responsible for dechlorinating different PCBs.
Report
Share
Report
Share
![PCBs ,[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Recent Advances Webinar Part 8
This document discusses several studies utilizing continuous flow microreactors for organic synthesis. One study produced an unstable Vilsmeier-Haack formylation intermediate in a safe and controlled manner using inline infrared analysis to optimize reaction conditions. Another used inline infrared to study gas-liquid homogeneous catalysis kinetics at high pressures. A third demonstrated automated optimization of a Pall-Knorr reaction using online infrared data in a microfluidic system.
Biological Oxygen Demand Lab Analysis and Background
The purpose of this experiment is to perform a Biochemical Oxygen Demand test on primary clarifier effluent from a wastewater treatment plant to determine a BOD versus time curve. This curve can then be used to determine the Ultimate BOD of the wastewater sample and the rate constant for its decay.
Bod btl2 new
The drain water sample had the highest BOD level of 0.963 mg/L, indicating it was the most polluted water. Distilled water had the lowest BOD level of 0.412 mg/L, showing it was the least polluted. BOD levels increased over time as microorganisms broke down organic matter, using up dissolved oxygen. Drain water likely had a high BOD due to large amounts of waste providing food for microorganisms. This experiment demonstrated how BOD can identify relative pollution levels between different water samples.
Genetic methods of microbial taxonomy
Genetic methods such as nucleic acid hybridization and restriction mapping are used in microbial taxonomy. Nucleic acid hybridization involves allowing single-stranded nucleic acids to interact and form complexes called hybrids between molecules with complementary sequences. Restriction mapping generates a map of where restriction enzyme recognition sites are located on a DNA molecule. These genetic methods provide precise information that can be used to classify microorganisms based on their DNA or RNA sequences.
Penta aquaticf ate and effects
This document summarizes the aquatic fate and effects of pentachlorophenol (PCP). PCP readily dissolves in water but degrades through photodegradation and biodegradation. While PCP can be toxic to aquatic organisms, organisms can also metabolize it rapidly and it does not significantly bioaccumulate or biomagnify in food chains. Modeling studies show exposures from treated wood structures will result in PCP concentrations in water and sediment below EPA toxicity thresholds.
Report BOD
1. The document describes an experiment to determine the biochemical oxygen demand (BOD) of various water samples using data loggers.
2. Samples of pond water, drain water, distilled water, aquarium water, and pipe water were tested by recording the initial and final dissolved oxygen concentrations over 5 days.
3. The BOD value, which indicates how polluted the water is, was calculated using the difference between initial and final dissolved oxygen levels. The higher the BOD value, the more polluted the water sample.
Experiment #7 dna. khafi
This document describes experiments to identify products of DNA hydrolysis. It lists materials used and procedures for tests to detect peptides, purine bases, reducing sugars like ribose and 2-deoxyribose, and inorganic phosphates. The results of qualitative tests on samples are presented, along with answers to questions about extracting DNA and RNA, comparing results to another experiment, tests to detect ribose and 2-deoxyribose, and other samples that can be used to isolate RNA and DNA.
chemical oxygen demand -analysis using APHA manual
This document provides details on methods for analyzing chemical oxygen demand (COD) using standards from the American Public Health Association (APHA) manual. It describes three common COD analysis methods: the open reflux method, closed reflux titrimetric method, and closed reflux colorimetric method. For each method, it outlines the key steps, including refluxing samples with dichromate and sulfuric acid, and then titrating or measuring color change to determine the amount of dichromate consumed and calculate the COD level. The document also discusses interferences, limitations, sampling, and analysis of COD values both above and below 50 mg O2/L.
Recommended
Recent Advances Webinar Part 8
This document discusses several studies utilizing continuous flow microreactors for organic synthesis. One study produced an unstable Vilsmeier-Haack formylation intermediate in a safe and controlled manner using inline infrared analysis to optimize reaction conditions. Another used inline infrared to study gas-liquid homogeneous catalysis kinetics at high pressures. A third demonstrated automated optimization of a Pall-Knorr reaction using online infrared data in a microfluidic system.
Biological Oxygen Demand Lab Analysis and Background
The purpose of this experiment is to perform a Biochemical Oxygen Demand test on primary clarifier effluent from a wastewater treatment plant to determine a BOD versus time curve. This curve can then be used to determine the Ultimate BOD of the wastewater sample and the rate constant for its decay.
Bod btl2 new
The drain water sample had the highest BOD level of 0.963 mg/L, indicating it was the most polluted water. Distilled water had the lowest BOD level of 0.412 mg/L, showing it was the least polluted. BOD levels increased over time as microorganisms broke down organic matter, using up dissolved oxygen. Drain water likely had a high BOD due to large amounts of waste providing food for microorganisms. This experiment demonstrated how BOD can identify relative pollution levels between different water samples.
Genetic methods of microbial taxonomy
Genetic methods such as nucleic acid hybridization and restriction mapping are used in microbial taxonomy. Nucleic acid hybridization involves allowing single-stranded nucleic acids to interact and form complexes called hybrids between molecules with complementary sequences. Restriction mapping generates a map of where restriction enzyme recognition sites are located on a DNA molecule. These genetic methods provide precise information that can be used to classify microorganisms based on their DNA or RNA sequences.
Penta aquaticf ate and effects
This document summarizes the aquatic fate and effects of pentachlorophenol (PCP). PCP readily dissolves in water but degrades through photodegradation and biodegradation. While PCP can be toxic to aquatic organisms, organisms can also metabolize it rapidly and it does not significantly bioaccumulate or biomagnify in food chains. Modeling studies show exposures from treated wood structures will result in PCP concentrations in water and sediment below EPA toxicity thresholds.
Report BOD
1. The document describes an experiment to determine the biochemical oxygen demand (BOD) of various water samples using data loggers.
2. Samples of pond water, drain water, distilled water, aquarium water, and pipe water were tested by recording the initial and final dissolved oxygen concentrations over 5 days.
3. The BOD value, which indicates how polluted the water is, was calculated using the difference between initial and final dissolved oxygen levels. The higher the BOD value, the more polluted the water sample.
Experiment #7 dna. khafi
This document describes experiments to identify products of DNA hydrolysis. It lists materials used and procedures for tests to detect peptides, purine bases, reducing sugars like ribose and 2-deoxyribose, and inorganic phosphates. The results of qualitative tests on samples are presented, along with answers to questions about extracting DNA and RNA, comparing results to another experiment, tests to detect ribose and 2-deoxyribose, and other samples that can be used to isolate RNA and DNA.
chemical oxygen demand -analysis using APHA manual
This document provides details on methods for analyzing chemical oxygen demand (COD) using standards from the American Public Health Association (APHA) manual. It describes three common COD analysis methods: the open reflux method, closed reflux titrimetric method, and closed reflux colorimetric method. For each method, it outlines the key steps, including refluxing samples with dichromate and sulfuric acid, and then titrating or measuring color change to determine the amount of dichromate consumed and calculate the COD level. The document also discusses interferences, limitations, sampling, and analysis of COD values both above and below 50 mg O2/L.
Bod slide
The document discusses a study conducted by UPSI students to measure biochemical oxygen demand (BOD) in two rivers near Tg. Malim. They found that one river had higher BOD due to more organic waste, leaving less oxygen for fish and resulting in more fish deaths. The students measured BOD using a data logger by tracking dissolved oxygen levels over 5 days in different water samples, finding the highest BOD in drain water.
Biochemical oxygen demand(bod)
BOD measures the amount of oxygen required by bacteria to decompose organic matter in sewage over 5 days. High BOD indicates more bacteria and organic matter, risking anaerobic conditions. BOD is usually lower than COD since not all organic matter is biodegradable. COD measures oxygen required to chemically oxidize all organic matter and is faster than BOD, making it better for industrial waste. Both tests determine organic pollutant levels, but COD captures a wider range and does not differentiate biodegradable and non-biodegradable matter.
Biological Oxygen Demand
The biological oxygen demand (BOD) measures the amount of dissolved oxygen needed by aerobic organisms to break down organic matter in water. Water with a high BOD cannot replenish oxygen fast enough to support aquatic life, potentially causing suffocation. BOD is normally measured over 5 days, with polluted water having a BOD above 5 parts per million. Thermal pollution degrades water quality by changing the ambient temperature, such as from careless discharge of heated water by industries or removing shading vegetation.
Coimbra 2008 2
The document describes Ion Jelly, a new conducting and biocompatible material made by mixing gelatin with ionic liquids. Ion Jelly is light, flexible, thermally stable up to 180°C, and has conductivity above 10-4 S/cm. It can be adjusted to various surfaces and is environmentally friendly. Ion Jelly shows potential for applications such as biosensors and electron transfer due to its ability to immobilize proteins while maintaining their activity.
RIP, OSPF, OPNET14.5, Performance analysis, IPv6.
RIP, OSPF, OPNET14.5, Performance analysis, IPv6.International Journal of Technical Research & Application
This study evaluated the biosorption of zinc and nickel from wastewater using dead fungal biomass of Aspergillus flavus. The maximum biosorption capacity for zinc was found to be 47.36% at pH 6.5, with a biomass concentration of 2g/L, contact time of 50 minutes, and zinc concentration of 2ppm. For nickel, the maximum biosorption capacity was 61.60% at pH 5, with a biomass concentration of 2g/L, contact time of 60 minutes, and nickel concentration of 2ppm. Desorption using 0.1M HCl was found to be effective in removing zinc and nickel from the fungal biomass,Biochemical Oxygen Demand and its Industrial Significance
BOD is the amount of dissolved oxygen needed by aerobic biological organism in a body of water to breakdown organic material present in a given water sample at certain temperature over a specific time period .
Most of Bacteria in the aquatic columns are aerobic. Escherichia coli, Bacillus subtilis, Vibrio cholera.
Atmosphere contains 21% oxygen (210000 mg/dm3)
Higher the temperature of water higher will be the rate of respiration. So, concentration of oxygen decreases.
Many Animal species can grow and reproduce normally when dissolved oxygen level is ~ 5.0 mg/L.
HYPOXIA: When dissolve oxygen content below 3.0 mg/L. Many Species move elsewhere and immobile species may die
ANOXIA: When dissolve oxygen content below 0.5 mg/L. All aerobic species will die
Fertilizer contains Nitrate contributes to high BOD
Phosphate present in Soap and detergent that enhances the growth of algal blooms. As a result depletion of oxygen occur.
In a body of water with large amount of decaying organic material , the dissolved oxygen level may drop by 90 %, this would represent High BOD
In a body of water with small amount of decaying organic material , the dissolved oxygen level may drop by 10 %, this would represent Low BOD
ANALYSIS OF BOD OF WATER
Use glass bottles having 60 mL or greater capacity. Take samples of water.
Turn on the constant temperature chamber to allow the
controlled temperature to stabilize at 20°C ±1°C.
Record the DO level (ppm) of one immediately.
Place water sample in an incubator in complete darkness at 20 C for 5 days. Exclude all light to prevent possibility of photosynthetic production of DO
If don't have an incubator, wrap the water sample bottle in aluminum foil or black electrical tape and store in a dark place at room temperature (20o C or 68 °F).
DILUTION OF SAMPLE
Most relatively unpolluted streams have a BOD5 that ranges from 1 to 8 mg/L
Dilution is necessary when the amount of DO consumed by microorganisms is greater than the amount of DO available in the air-saturated.
If the BOD5 value of a sample is less than 7 mg/L, sample dilution is not needed.
The DO concentration after 5 days must be at least 1 mg/L and at least 2 mg/L lower in concentration than the initial DO
(American Public Health Association and others, 1995).
BOD of the dilution water is less than 0.2 mg/L.
Discard dilution water if there is any sign of biological growth.
pH of the dilution water needs to be maintained in a range suitable for bacterial growth
Bacterial growth is very good between 6.5 to 7.5
Sulfuric acid or sodium hydroxide may need to be added to the dilution water to lower or raise the pH, respectively.
CALCULATION:
The general equation for the determination of a BOD5 value is:
BOD = D1-D2/P
Where
D1 = initial DO of the sample,
D2 = final DO of the sample after 5 days, and
P = decimal volumetric fraction of sample used.
If 100 mL of sample a
Biochemical Oxygen Demand (BOD)
Details about Biochemical Oxygen Demand(BOD) with solved examples. Extra examples are given for homework. You can contact me for details on pratik1516@gmail.com.
12 water and waste water treatment
Nano materials have properties that make them well suited for addressing issues with current water treatment technologies. Their large surface area and reactivity allows them to more effectively adsorb contaminants. Nano adsorbents like carbon nanotubes and metal oxides can remove higher levels of pollutants. Nano catalysts like titanium dioxide and zinc oxide use photoactivity to break down chemicals. Nanoscale filters made of alumina or carbon nanotubes can remove bacteria and viruses. While nanotechnology shows promise for improving water treatment, further research is needed to assess environmental and health risks and make the techniques economically viable at large scales.
Chemical Oxygen Demand
This document provides instructions for measuring chemical oxygen demand (COD) using the dichromate reactor digestion method. Key points include:
- The test measures COD concentrations from 0.7-40 mg/L (ULR range), 3-150 mg/L (LR range), 20-1500 mg/L (HR range), and 200-15,000 mg/L (HR Plus range).
- Samples are digested using COD reagent vials in a heated reactor to oxidize organic compounds. Absorbance of digested samples is then measured colorimetrically.
- Interferences from chloride are removed by mercuric sulfate in the reagent vials. Samples with high chloride must
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
BOD and COD are common measures of water pollution. BOD measures the amount of dissolved oxygen needed by microorganisms to break down organic matter over 5 days. COD measures the amount of oxygen required to chemically oxidize organic and inorganic compounds. While both measure organic compounds, COD is less specific as it measures all chemically oxidizable material. BOD only measures biologically oxidizable organic matter. Calculations of BOD and COD involve measuring dissolved oxygen levels before and after incubation over 5 days or chemical oxidation. COD uses a chemical oxidation process while BOD relies on microbial decomposition.
journal.pone.0138448
This document summarizes a research study that investigated using a microbial fuel cell coupled with an activated sludge process to simultaneously generate electricity and bioremediate an azo dye wastewater. The study tested different concentrations of the azo dye acid navy blue R in the microbial fuel cell. Decolorization of the dye followed pseudo-first order kinetics. Peak power density and coulombic efficiency were achieved at 200 ppm dye concentration. Cyclic voltammetry confirmed redox reactions were occurring. The degradation products were further treated in an aerobic reactor to achieve complete mineralization. Microbial community analysis and SEM-EDX characterization were also conducted. The combined anaerobic-aerobic process shows potential for effective dye degradation and
BIOLOGICAL OXYGEN DEMAND
The document discusses biochemical oxygen demand (BOD) and its importance as a measure of water quality. BOD is defined as the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material in a water sample over a 5 day incubation period at 20°C. A higher BOD indicates a higher level of organic pollution. BOD is used to assess the effectiveness of wastewater treatment plants and provides an indication of overall water quality. The standard BOD test involves measuring the dissolved oxygen in a sample before and after 5 days, with the difference representing the oxygen consumed during decomposition of organic compounds.
Pb S Nanostructures.Work At Ii Sc
Lead sulfide (PbS) is a semiconductor with applications in photonics and optoelectronics. PbS nanostructures of different morphologies including flower dendrites, sheets, and rod-like structures were synthesized via hydrothermal methods. These nanostructures exhibited broad absorption spectra in the near-infrared region and photoluminescence emission around 0.6 eV. Capping the nanostructures' surfaces with organic ligands improved their optical properties by passivating surface defects. Films of PbS nanostructures embedded in a conducting polymer showed photoconductive behavior and potential for photodetector applications.
Water pollution
The document describes an experiment to measure water pollution using biochemical oxygen demand (BOD), chemical oxygen demand (COD), and dissolved oxygen (DO). [1] The experiment tested leachate from a landfill and a nearby river. [2] The leachate had much higher COD and BOD levels compared to the river, indicating it was highly polluted and possibly polluting the river. [3] BOD measures biodegradable pollution over 5 days while COD more quickly measures all oxidizable chemicals, so COD is usually higher.
Bod5 copy
The document discusses the biochemical oxygen demand (BOD) test procedure for determining the amount of dissolved oxygen consumed by microorganisms while decomposing organic matter in water samples over a 5 day period. It provides background on BOD and dissolved oxygen, lists the necessary supplies and reagents, and describes the steps to conduct the BOD test and calculate results to evaluate water quality. A 5-day duration is used for the BOD test because most of the biodegradable organic matter will be degraded within 5 days if sufficient microorganisms and oxygen are present.
Nanoparticles in modern separation science
Nanoparticles have various applications in modern separation science techniques. They can be used in liquid chromatography, gas chromatography, capillary electrophoresis, microchip electrophoresis, and ion chromatography. Nanoparticles are relatively easy to synthesize and functionalize, and have large surface area to volume ratios ideal for separations. Common nanoparticles used include gold nanoparticles, silica nanoparticles, and magnetic nanoparticles. They have been shown to improve separation efficiency, selectivity, and resolution compared to conventional separation methods. However, while successful in research, nanoparticle-based separations have not been widely adopted in industrial settings.
seminar presentation
The document summarizes the total synthesis of (±)-spiroindimicins B and C, which are alkaloids isolated from a deep-sea marine actinomycete. Key steps in the synthesis include installing a spirocenter using an intramolecular Heck reaction, forming a pentacyclic spirobisindole through Fischer indolization, and constructing a trisubstituted pyrrole ring via a late-stage Schöllkopf–Magnus–Barton–Zard reaction. The synthesis confirms the unique heteroaromatic structure of these natural products and demonstrates the use of mild reactions to install functional groups like the spirocenter and pyrrole ring.
sewage determination by bod method
The document discusses the biochemical oxygen demand (BOD) method for determining sewage quality. It defines BOD as the amount of dissolved oxygen needed by organisms to break down organic material in water. The most common BOD test is the 5-day BOD (BOD5) test, which measures the oxygen demand over a 5-day incubation period at 20°C. Elevated BOD levels can be caused by human/animal waste, fertilizer runoff, and higher water temperatures that increase plant growth. The document outlines the detailed procedures for conducting the BOD5 test and analyzing the results. It notes advantages of the test being simple and widely used but disadvantages include its long incubation period and susceptibility to inhibition.
Fc24961966
This document summarizes a study that isolated and characterized a chromium-remediating bacterium from electroplating effluent.
Key findings:
- A bacterium, identified as Bacillus subtilis strain PESA, was isolated that could grow in media with high chromium concentrations up to 800 mg/L.
- Experiments found that strain PESA reduced chromium levels in media by over 50% within 10 days when incubated at pH 3.0 and 30-32°C.
- Optimal conditions for chromium reduction were determined to be pH 3.0 and temperatures between 28-32°C, with up to 93% reduction observed under these conditions.
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
The document discusses the estimation of dissolved oxygen (DO), biological oxygen demand (BOD), and chemical oxygen demand (COD) in a canal water sample. DO was found to be 3.20 ppm, BOD was 54.24 ppm, and COD was 220 ppm in the sample. BOD measures the amount of oxygen consumed by microorganisms to break down organic matter over 5 days. COD uses a strong chemical oxidant to measure total organic compounds and some inorganic compounds. While related, BOD and COD measure oxygen demand slightly differently. BOD is more relevant for organic-rich waters, while COD provides a faster test that is not affected by toxins.
pesticide-persistence
This document defines persistent pollutants as toxic chemicals that remain in the environment for long periods without breaking down, accumulate in animals through the food chain, and are widespread. It discusses specific persistent organic pollutants like DDT, PCBs, dioxins, and mercury that were widely used but are now regulated or banned due to health effects. The document also outlines integrated pest management as a more sustainable approach than using persistent pesticides.
3.4.2polychlorinated
Polychlorinated biphenyls (PCBs) are a group of man-made organic chemicals consisting of chlorinated derivatives of biphenyl. PCBs were domestically manufactured from 1929 until their manufacture was banned in 1979 due to evidence they build up in the environment and can cause harmful health effects. PCBs are still widely found in the environment and human body because they do not break down easily.
More Related Content
What's hot
Bod slide
The document discusses a study conducted by UPSI students to measure biochemical oxygen demand (BOD) in two rivers near Tg. Malim. They found that one river had higher BOD due to more organic waste, leaving less oxygen for fish and resulting in more fish deaths. The students measured BOD using a data logger by tracking dissolved oxygen levels over 5 days in different water samples, finding the highest BOD in drain water.
Biochemical oxygen demand(bod)
BOD measures the amount of oxygen required by bacteria to decompose organic matter in sewage over 5 days. High BOD indicates more bacteria and organic matter, risking anaerobic conditions. BOD is usually lower than COD since not all organic matter is biodegradable. COD measures oxygen required to chemically oxidize all organic matter and is faster than BOD, making it better for industrial waste. Both tests determine organic pollutant levels, but COD captures a wider range and does not differentiate biodegradable and non-biodegradable matter.
Biological Oxygen Demand
The biological oxygen demand (BOD) measures the amount of dissolved oxygen needed by aerobic organisms to break down organic matter in water. Water with a high BOD cannot replenish oxygen fast enough to support aquatic life, potentially causing suffocation. BOD is normally measured over 5 days, with polluted water having a BOD above 5 parts per million. Thermal pollution degrades water quality by changing the ambient temperature, such as from careless discharge of heated water by industries or removing shading vegetation.
Coimbra 2008 2
The document describes Ion Jelly, a new conducting and biocompatible material made by mixing gelatin with ionic liquids. Ion Jelly is light, flexible, thermally stable up to 180°C, and has conductivity above 10-4 S/cm. It can be adjusted to various surfaces and is environmentally friendly. Ion Jelly shows potential for applications such as biosensors and electron transfer due to its ability to immobilize proteins while maintaining their activity.
RIP, OSPF, OPNET14.5, Performance analysis, IPv6.
RIP, OSPF, OPNET14.5, Performance analysis, IPv6.International Journal of Technical Research & Application
This study evaluated the biosorption of zinc and nickel from wastewater using dead fungal biomass of Aspergillus flavus. The maximum biosorption capacity for zinc was found to be 47.36% at pH 6.5, with a biomass concentration of 2g/L, contact time of 50 minutes, and zinc concentration of 2ppm. For nickel, the maximum biosorption capacity was 61.60% at pH 5, with a biomass concentration of 2g/L, contact time of 60 minutes, and nickel concentration of 2ppm. Desorption using 0.1M HCl was found to be effective in removing zinc and nickel from the fungal biomass,Biochemical Oxygen Demand and its Industrial Significance
BOD is the amount of dissolved oxygen needed by aerobic biological organism in a body of water to breakdown organic material present in a given water sample at certain temperature over a specific time period .
Most of Bacteria in the aquatic columns are aerobic. Escherichia coli, Bacillus subtilis, Vibrio cholera.
Atmosphere contains 21% oxygen (210000 mg/dm3)
Higher the temperature of water higher will be the rate of respiration. So, concentration of oxygen decreases.
Many Animal species can grow and reproduce normally when dissolved oxygen level is ~ 5.0 mg/L.
HYPOXIA: When dissolve oxygen content below 3.0 mg/L. Many Species move elsewhere and immobile species may die
ANOXIA: When dissolve oxygen content below 0.5 mg/L. All aerobic species will die
Fertilizer contains Nitrate contributes to high BOD
Phosphate present in Soap and detergent that enhances the growth of algal blooms. As a result depletion of oxygen occur.
In a body of water with large amount of decaying organic material , the dissolved oxygen level may drop by 90 %, this would represent High BOD
In a body of water with small amount of decaying organic material , the dissolved oxygen level may drop by 10 %, this would represent Low BOD
ANALYSIS OF BOD OF WATER
Use glass bottles having 60 mL or greater capacity. Take samples of water.
Turn on the constant temperature chamber to allow the
controlled temperature to stabilize at 20°C ±1°C.
Record the DO level (ppm) of one immediately.
Place water sample in an incubator in complete darkness at 20 C for 5 days. Exclude all light to prevent possibility of photosynthetic production of DO
If don't have an incubator, wrap the water sample bottle in aluminum foil or black electrical tape and store in a dark place at room temperature (20o C or 68 °F).
DILUTION OF SAMPLE
Most relatively unpolluted streams have a BOD5 that ranges from 1 to 8 mg/L
Dilution is necessary when the amount of DO consumed by microorganisms is greater than the amount of DO available in the air-saturated.
If the BOD5 value of a sample is less than 7 mg/L, sample dilution is not needed.
The DO concentration after 5 days must be at least 1 mg/L and at least 2 mg/L lower in concentration than the initial DO
(American Public Health Association and others, 1995).
BOD of the dilution water is less than 0.2 mg/L.
Discard dilution water if there is any sign of biological growth.
pH of the dilution water needs to be maintained in a range suitable for bacterial growth
Bacterial growth is very good between 6.5 to 7.5
Sulfuric acid or sodium hydroxide may need to be added to the dilution water to lower or raise the pH, respectively.
CALCULATION:
The general equation for the determination of a BOD5 value is:
BOD = D1-D2/P
Where
D1 = initial DO of the sample,
D2 = final DO of the sample after 5 days, and
P = decimal volumetric fraction of sample used.
If 100 mL of sample a
Biochemical Oxygen Demand (BOD)
Details about Biochemical Oxygen Demand(BOD) with solved examples. Extra examples are given for homework. You can contact me for details on pratik1516@gmail.com.
12 water and waste water treatment
Nano materials have properties that make them well suited for addressing issues with current water treatment technologies. Their large surface area and reactivity allows them to more effectively adsorb contaminants. Nano adsorbents like carbon nanotubes and metal oxides can remove higher levels of pollutants. Nano catalysts like titanium dioxide and zinc oxide use photoactivity to break down chemicals. Nanoscale filters made of alumina or carbon nanotubes can remove bacteria and viruses. While nanotechnology shows promise for improving water treatment, further research is needed to assess environmental and health risks and make the techniques economically viable at large scales.
Chemical Oxygen Demand
This document provides instructions for measuring chemical oxygen demand (COD) using the dichromate reactor digestion method. Key points include:
- The test measures COD concentrations from 0.7-40 mg/L (ULR range), 3-150 mg/L (LR range), 20-1500 mg/L (HR range), and 200-15,000 mg/L (HR Plus range).
- Samples are digested using COD reagent vials in a heated reactor to oxidize organic compounds. Absorbance of digested samples is then measured colorimetrically.
- Interferences from chloride are removed by mercuric sulfate in the reagent vials. Samples with high chloride must
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
BOD and COD are common measures of water pollution. BOD measures the amount of dissolved oxygen needed by microorganisms to break down organic matter over 5 days. COD measures the amount of oxygen required to chemically oxidize organic and inorganic compounds. While both measure organic compounds, COD is less specific as it measures all chemically oxidizable material. BOD only measures biologically oxidizable organic matter. Calculations of BOD and COD involve measuring dissolved oxygen levels before and after incubation over 5 days or chemical oxidation. COD uses a chemical oxidation process while BOD relies on microbial decomposition.
journal.pone.0138448
This document summarizes a research study that investigated using a microbial fuel cell coupled with an activated sludge process to simultaneously generate electricity and bioremediate an azo dye wastewater. The study tested different concentrations of the azo dye acid navy blue R in the microbial fuel cell. Decolorization of the dye followed pseudo-first order kinetics. Peak power density and coulombic efficiency were achieved at 200 ppm dye concentration. Cyclic voltammetry confirmed redox reactions were occurring. The degradation products were further treated in an aerobic reactor to achieve complete mineralization. Microbial community analysis and SEM-EDX characterization were also conducted. The combined anaerobic-aerobic process shows potential for effective dye degradation and
BIOLOGICAL OXYGEN DEMAND
The document discusses biochemical oxygen demand (BOD) and its importance as a measure of water quality. BOD is defined as the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material in a water sample over a 5 day incubation period at 20°C. A higher BOD indicates a higher level of organic pollution. BOD is used to assess the effectiveness of wastewater treatment plants and provides an indication of overall water quality. The standard BOD test involves measuring the dissolved oxygen in a sample before and after 5 days, with the difference representing the oxygen consumed during decomposition of organic compounds.
Pb S Nanostructures.Work At Ii Sc
Lead sulfide (PbS) is a semiconductor with applications in photonics and optoelectronics. PbS nanostructures of different morphologies including flower dendrites, sheets, and rod-like structures were synthesized via hydrothermal methods. These nanostructures exhibited broad absorption spectra in the near-infrared region and photoluminescence emission around 0.6 eV. Capping the nanostructures' surfaces with organic ligands improved their optical properties by passivating surface defects. Films of PbS nanostructures embedded in a conducting polymer showed photoconductive behavior and potential for photodetector applications.
Water pollution
The document describes an experiment to measure water pollution using biochemical oxygen demand (BOD), chemical oxygen demand (COD), and dissolved oxygen (DO). [1] The experiment tested leachate from a landfill and a nearby river. [2] The leachate had much higher COD and BOD levels compared to the river, indicating it was highly polluted and possibly polluting the river. [3] BOD measures biodegradable pollution over 5 days while COD more quickly measures all oxidizable chemicals, so COD is usually higher.
Bod5 copy
The document discusses the biochemical oxygen demand (BOD) test procedure for determining the amount of dissolved oxygen consumed by microorganisms while decomposing organic matter in water samples over a 5 day period. It provides background on BOD and dissolved oxygen, lists the necessary supplies and reagents, and describes the steps to conduct the BOD test and calculate results to evaluate water quality. A 5-day duration is used for the BOD test because most of the biodegradable organic matter will be degraded within 5 days if sufficient microorganisms and oxygen are present.
Nanoparticles in modern separation science
Nanoparticles have various applications in modern separation science techniques. They can be used in liquid chromatography, gas chromatography, capillary electrophoresis, microchip electrophoresis, and ion chromatography. Nanoparticles are relatively easy to synthesize and functionalize, and have large surface area to volume ratios ideal for separations. Common nanoparticles used include gold nanoparticles, silica nanoparticles, and magnetic nanoparticles. They have been shown to improve separation efficiency, selectivity, and resolution compared to conventional separation methods. However, while successful in research, nanoparticle-based separations have not been widely adopted in industrial settings.
seminar presentation
The document summarizes the total synthesis of (±)-spiroindimicins B and C, which are alkaloids isolated from a deep-sea marine actinomycete. Key steps in the synthesis include installing a spirocenter using an intramolecular Heck reaction, forming a pentacyclic spirobisindole through Fischer indolization, and constructing a trisubstituted pyrrole ring via a late-stage Schöllkopf–Magnus–Barton–Zard reaction. The synthesis confirms the unique heteroaromatic structure of these natural products and demonstrates the use of mild reactions to install functional groups like the spirocenter and pyrrole ring.
sewage determination by bod method
The document discusses the biochemical oxygen demand (BOD) method for determining sewage quality. It defines BOD as the amount of dissolved oxygen needed by organisms to break down organic material in water. The most common BOD test is the 5-day BOD (BOD5) test, which measures the oxygen demand over a 5-day incubation period at 20°C. Elevated BOD levels can be caused by human/animal waste, fertilizer runoff, and higher water temperatures that increase plant growth. The document outlines the detailed procedures for conducting the BOD5 test and analyzing the results. It notes advantages of the test being simple and widely used but disadvantages include its long incubation period and susceptibility to inhibition.
Fc24961966
This document summarizes a study that isolated and characterized a chromium-remediating bacterium from electroplating effluent.
Key findings:
- A bacterium, identified as Bacillus subtilis strain PESA, was isolated that could grow in media with high chromium concentrations up to 800 mg/L.
- Experiments found that strain PESA reduced chromium levels in media by over 50% within 10 days when incubated at pH 3.0 and 30-32°C.
- Optimal conditions for chromium reduction were determined to be pH 3.0 and temperatures between 28-32°C, with up to 93% reduction observed under these conditions.
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
The document discusses the estimation of dissolved oxygen (DO), biological oxygen demand (BOD), and chemical oxygen demand (COD) in a canal water sample. DO was found to be 3.20 ppm, BOD was 54.24 ppm, and COD was 220 ppm in the sample. BOD measures the amount of oxygen consumed by microorganisms to break down organic matter over 5 days. COD uses a strong chemical oxidant to measure total organic compounds and some inorganic compounds. While related, BOD and COD measure oxygen demand slightly differently. BOD is more relevant for organic-rich waters, while COD provides a faster test that is not affected by toxins.
What's hot (20)
Biochemical Oxygen Demand and its Industrial Significance
Biochemical Oxygen Demand and its Industrial Significance
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
Viewers also liked
pesticide-persistence
This document defines persistent pollutants as toxic chemicals that remain in the environment for long periods without breaking down, accumulate in animals through the food chain, and are widespread. It discusses specific persistent organic pollutants like DDT, PCBs, dioxins, and mercury that were widely used but are now regulated or banned due to health effects. The document also outlines integrated pest management as a more sustainable approach than using persistent pesticides.
3.4.2polychlorinated
Polychlorinated biphenyls (PCBs) are a group of man-made organic chemicals consisting of chlorinated derivatives of biphenyl. PCBs were domestically manufactured from 1929 until their manufacture was banned in 1979 due to evidence they build up in the environment and can cause harmful health effects. PCBs are still widely found in the environment and human body because they do not break down easily.
Pressurized accelerated extraction of pollutants
Accelerated solvent extraction (ASE) is a technique that uses solvents, elevated temperatures, and pressures to efficiently extract analytes from solid samples. It provides several advantages over traditional techniques like Soxhlet extraction, including requiring smaller sample and solvent volumes and shorter extraction times. Key factors that influence ASE extraction include sample preparation, solvent selection, temperature, pressure, static time, flush volume, and number of cycles. These parameters require optimization for different sample matrixes and target analytes. ASE is useful for extracting pesticides, PAHs, PCBs, and dioxins from soils, sediments, plants and other solid environmental samples.
PCBs and PAHs
This document discusses polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), two common air pollutants. It provides background on PCBs and PAHs, including their chemical structures and properties. PCBs were widely used but are now banned globally due to their persistence in the environment and toxicity. Long-term exposure to PCBs and PAHs can lead to cancer and other health effects in animals and humans. The document also describes methods used to measure levels of PCBs and PAHs in ambient air samples.
Ph.D. work
Introduction of Mycobacterium tuberculosis, quinoline and their biological importance. Design, diversity oriented synthesis, primary antimycobacterial activity evaluation against M.smegmatis strain and library generation of bedaquiline related quinolinyl heterocycles. Structure optimization of obtained active hits by using molecular hybridization, ring functionalization and antimycobacterial activity evaluation against M.smegmatis strain. Low cytotoxicity against A549 cells highlighted the efficiency of the hits. Also antimicrobial and anti-inflammatory activities were also carried out. BDMS catalyzed one pot multicomponent synthesis of imidazo[1,2-a]pyridine and Friedlander synthesis of quinolone under solvent free conditions.
Xinobiotic Biodegradation
The document discusses biodegradation of various industrial wastes. It describes how wastes from petrochemical, plastic, paint, pesticide and other industries like pharmaceutical are broken down by microorganisms. For petrochemical waste, oil spills can be degraded by bacteria and fungi over time. Plastic waste is difficult to degrade but alternatives like bioplastics are discussed. Paint waste requires physical, chemical and biological treatment. Various microbes are able to degrade different pesticides. Nitrile compounds in waste can be broken down by nitrilase enzymes produced by some bacteria, yeast and fungi.
Biodegradation of petroleum
BIODEGRADATION OF PETROLEUM using microorganisms,various techniques by which bioremediation is done-such as physical,chemical and biological
Petroleum biodegradation
This document defines key terms related to petroleum biodegradation and bioremediation. It discusses how bioremediation uses microorganisms to transform pollutants like oil spills into less toxic forms through biodegradation. Several factors influence bioremediation, including the presence of microbes that can degrade pollutants, availability of the pollutants to the microbes, and environmental conditions like temperature, pH, oxygen, and nutrients. The document also provides examples of microbes involved in hydrocarbon degradation and outlines the principles and processes of bioremediation.
Biodegradation of pollutant 1
The document discusses various forms of pollution and methods of pollutant biodegradation. It focuses on biodegradation, the process by which microorganisms break down pollutants for energy. Specific examples discussed include biodegradation of hydrocarbons in oil spills by hydrocarbon-degrading bacteria. While many pollutants can be broken down biologically, some like heavy metals require additional remediation methods. Overall the document provides an overview of pollution types and how bioremediation can help reduce environmental contamination.
Biodegradation
Guest lecture given to the University of Greenwich MSc in in Environmental Science class on 9 February 2004.
N.B. Contact details are out of date.
Viewers also liked (10)
Similar to Rotation I Presentation
0145PM-Carolina Zampol Lazaro.pdf
The document discusses various biological methods for hydrogen production, including reduction of CO2 with hydrogen, biomass processing through fermentation or reforming, and microbial routes like biophotolysis and dark fermentation. It summarizes different approaches to biophotolysis using cyanobacteria and photosynthetic bacteria. Efforts to improve process efficiency through co-cultures and sequential systems combining metabolic pathways are also outlined. The strategies aim to optimize variables like substrate concentration and organism ratios to increase hydrogen yield and removal of chemical oxygen demand while reducing byproducts.
Selected Research Topics
Research topic listing including marine ecology, neurochemistry, toxicology, pharmacology, biochemistry, and biology
Treatment of Chlorinated Chemicals
The document summarizes a pilot-scale study on ex-situ bioremediation of chlorobenzenes in contaminated soil. Three 6 m3 soil cells were treated with varying amounts (0-35%) of organic amendments and nutrients to stimulate native microorganisms. Over 2-3 weeks, approximately 90% of dichlorobenzene was removed from soils, with residual levels below detection limits. Laboratory tests confirmed the presence of microorganisms capable of mineralizing chlorobenzenes in the treated soils. The study demonstrates that vented ex-situ biotreatment can effectively remove chlorobenzenes through biodegradation without excessive losses from volatilization.
Bioremediation of Chlorobenzenes
The document summarizes a pilot-scale study on ex-situ bioremediation of chlorobenzenes in contaminated soil. Three soil cells were treated with varying amounts (0-35%) of organic amendments and nutrients to stimulate native microorganisms. Over 2-3 weeks, approximately 90% of dichlorobenzene was removed from soils, with residual levels below detection limits. Adding organic matter did not enhance removal under test conditions designed to minimize volatilization. Biodegradation was estimated to account for 90% of chlorobenzene removal. Laboratory tests confirmed the presence of microorganisms capable of mineralizing chlorobenzenes in the treated soils.
Biodegradation of pc bs
This document discusses the biodegradation of polychlorinated biphenyls (PCBs). PCBs can accumulate in organisms and biomagnify up the food chain, posing risks to human health. The document outlines two mechanisms by which microorganisms can biodegrade PCBs: aerobic bacteria that use the 2,3-dioxygenase pathway to convert PCBs to chlorobenzoic acids, and anaerobic bacteria that use reductive dechlorination to remove chlorines from highly chlorinated PCBs. A two-step combined anaerobic/aerobic process can first convert highly chlorinated PCBs to lightly chlorinated ones via anaerobic dechlorination before final aer
JBEI Science Highlights - November 2022
November 2022 - Summary slides of Joint BioEnergy Institute (JBEI) research on biofuels and bioproducts.
Colloquium presentation (Yang)
This document summarizes a study on the biodegradation of Pharmaceutically Active Compounds (PhACs) in the presence of humus under different redox conditions. The study tested PhAC biodegradation under aerobic and anaerobic redox conditions including aerobic respiration, aerobic nitrification, denitrification, sulfidogenic, and methanogenic conditions. It was found that humus increased removal of Naproxen under some aerobic and anaerobic conditions. The document concludes with recommendations for improving experimental controls and using enrichment bacteria in future studies.
corrosion
CleanOxide 75 is a 0.75% solution of pure chlorine dioxide in water that is not corrosive when used at recommended dose rates. Previous research found that chlorine dioxide generated from acidifying sodium chlorite solutions can be corrosive due to excess acid present, but pure chlorine dioxide in gas or solution form is not corrosive. Testing of CleanOxide 75 on 304 and 316 stainless steel found no corrosion at levels up to 100 ppm chlorine dioxide at pH 7.2 over 10 days, demonstrating it is not corrosive.
Ex-situ Bioremediation of Chlorobenzenes in Soil
Chlorinated benzenes, including chlorobenzene (CB) and 1,2-dichlorobenzene (DCB) are widely used as chemical intermediates and solvents
across industry. Soil contaminated with these compounds was treated in a pilot-scale trial in 6m3 cells. Air was drawn through each cell and
exhausted via an activated carbon (GAC) filter system. The trial objective was to stimulate native microflora with nutrients and varying levels
of organic amendments (0%, 12% and 35%). Initial soil DCB concentrations varied from <1 /><5% of the chlorinated benzenes were removed by volatilization
and 90% removed by biodegradation. Laboratory shake flask trials confirmed that the soils in the pilot-scale treatment contained a microbial
consortium capable of mineralizing CB and DCB. This consortium was capable of mineralizing both CB and DCB with up to 50% of carbon added
as chlorinated benzene substrate being recovered as CO2 and up to 44% of organic chlorine being released as chloride ion in mineralization tests,
further confirming these chlorinated benzenes were biodegraded. The study confirms that vented ex-situ biotreatment processes for chlorinated
benzenes can be achieved without excessive losses from volatilization and that naturally occurring microflora can be readily stimulated with aeration
and nutrients.
Research Inventy : International Journal of Engineering and Science
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Biocrude from Switchgrass
Switchgrass can be depolymerized to produce biocrude using subcritical water in the presence of alkali salt.
microbial community structure of polluted river sediments
Phospholipid Fatty Acid Analysis to measure the Impact of acid rock drainage on microbial communities in sediment and comparison with other measures,
Biodegradation of hydrocarbon
Hydrocarbons are major constituents of crude oil and petroleum. They can be biodegraded by naturally-occurring microorganisms in freshwater and marine environments under a variety of aerobic and anaerobic conditions. Oxygen, nitrate, or sulfates are sometimes added as electron acceptors to enhance biodegradation rates.
Presentacion3
The document discusses research conducted at CINVESTAV-IPN on bioreactors for treating wastewater contaminated with chlorinated aliphatic compounds like perchloroethylene (PCE) under various anaerobic conditions. Simultaneous electron acceptor (SEA) systems using methanogenesis and denitrification were evaluated. An anaerobic fluidized bed bioreactor and two complete mix reactors were compared over different periods with varying PCE concentrations and loading ratios. The fluidized bed bioreactor generally achieved better PCE and organic matter removal than the complete mix reactors. Bacterial community analysis showed differences between reactors and operating periods.
JBEI Science Highlights - February 2023
February 2023 - Summary slides of Joint BioEnergy Institute (JBEI) research on biofuels and bioproducts.
JBEI Highlights April 2020
This document summarizes several research studies:
1. One study investigated the metabolic flexibility of Pseudomonas taiwanensis VLB120 by knocking out NADH dehydrogenases and performing multi-omics analysis. It revealed the bacterium's high robustness and proposed a metabolic response to type-2 NADH dehydrogenase deficiency.
2. Another characterized the BorB thioesterase from Streptomyces parvulus, determining its structure provides a substrate binding site and specificity.
3. A third engineered Pseudomonas putida to produce bisdemethoxycurcumin by leveraging its native lignin catabolism pathways.
4. A fourth studied Aspergillus niger's
Final Draft of Poster Blue
The researchers genetically engineered the archaeon Haloferax volcanii to produce butanol from cellulose. They developed a synthetic pathway that hijacks H. volcanii's native fatty acid synthesis pathway. By interrupting the gene that converts the four-carbon product to six carbons, they aim to accumulate butyryl-CoA which can then be converted to butanol. They designed gene knockout constructs targeting two genes, ACD2 and ACD3, and obtained some successful knockouts as confirmed by PCR. Future work will incorporate cellulases, increase ionic liquid tolerance, and test for butyric acid accumulation in the knockouts.
Distillery Wastewater Decontamination by the Fenton Advanced Oxidation Method
This study evaluated the effect of Fenton advanced oxidation process on the treatment of an industrial wastewater (distillery). The comparison of the effects of Fe2+ loadings, H2O2 dosages (2%(v/v)and 4%(v/v)), reaction temperature and reaction time, established optimum efficiency in terms of BOD and COD reductions. The best operating conditions for the treatment of the distillery wastewater containing 43.85 mg/L BOD concentration and 274.28 mg/L COD concentration in the raw effluent was 2% H2O2 dosage at constant loadings of Fe2+ (1.5 g), 80 oC pretreatment temperature, and 1 h reaction time. At this optimized condition, the BOD content reduced to about 35 mg/L (about 21% removal) and COD content reduced to about 53 mg/L (about 81% removal). There was a complete removal of the initial colour present in the wastewater after the treatment process. The process proved the ability to effectively reduce the COD content which when high in industrial wastewaters can lead to serious impacts to the environment.
Irwa Presentation 2009
The document discusses the use of chlorine dioxide (ClO2) in drinking water applications. It provides an overview of ClO2 generation methods and attributes. ClO2 is an effective disinfectant that does not form regulated disinfection byproducts. It can be generated on-site electrochemically using a single precursor for a pure, reliable and safe product. Case studies show ClO2 improved disinfection and reduced DBPs and odor/taste issues compared to chlorine.
ENVIRONMENTAL FATE OF POLYCHLORINATED BIPHENYL (PCB).pptx
Polychlorinated biphenyls (PCBs) are a class of artificial organic compound that are produced by the direct chlorination of the biphenyl ring.
This seminar presentation looks into key headings such as:
i. uses of PCBs
ii. routes of entry into the environment
iii. Current sources of PCBs
iv. Toxicity
v. Management and Control of PCBs
Similar to Rotation I Presentation (20)
Research Inventy : International Journal of Engineering and Science
Research Inventy : International Journal of Engineering and Science
microbial community structure of polluted river sediments
microbial community structure of polluted river sediments
Distillery Wastewater Decontamination by the Fenton Advanced Oxidation Method
Distillery Wastewater Decontamination by the Fenton Advanced Oxidation Method
ENVIRONMENTAL FATE OF POLYCHLORINATED BIPHENYL (PCB).pptx
ENVIRONMENTAL FATE OF POLYCHLORINATED BIPHENYL (PCB).pptx
Recently uploaded
GraphSummit Singapore | Enhancing Changi Airport Group's Passenger Experience...
Dr. Sean Tan, Head of Data Science, Changi Airport Group
Discover how Changi Airport Group (CAG) leverages graph technologies and generative AI to revolutionize their search capabilities. This session delves into the unique search needs of CAG’s diverse passengers and customers, showcasing how graph data structures enhance the accuracy and relevance of AI-generated search results, mitigating the risk of “hallucinations” and improving the overall customer journey.
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
Full-RAG: A modern architecture for hyper-personalization
Mike Del Balso, CEO & Co-Founder at Tecton, presents "Full RAG," a novel approach to AI recommendation systems, aiming to push beyond the limitations of traditional models through a deep integration of contextual insights and real-time data, leveraging the Retrieval-Augmented Generation architecture. This talk will outline Full RAG's potential to significantly enhance personalization, address engineering challenges such as data management and model training, and introduce data enrichment with reranking as a key solution. Attendees will gain crucial insights into the importance of hyperpersonalization in AI, the capabilities of Full RAG for advanced personalization, and strategies for managing complex data integrations for deploying cutting-edge AI solutions.
Climate Impact of Software Testing at Nordic Testing Days
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
AI 101: An Introduction to the Basics and Impact of Artificial Intelligence
Imagine a world where machines not only perform tasks but also learn, adapt, and make decisions. This is the promise of Artificial Intelligence (AI), a technology that's not just enhancing our lives but revolutionizing entire industries.
GraphSummit Singapore | Neo4j Product Vision & Roadmap - Q2 2024
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
TrustArc Webinar - 2024 Global Privacy Survey
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Presentation of the OECD Artificial Intelligence Review of Germany
Consult the full report at https://www.oecd.org/digital/oecd-artificial-intelligence-review-of-germany-609808d6-en.htm
“I’m still / I’m still / Chaining from the Block”
“An Outlook of the Ongoing and Future Relationship between Blockchain Technologies and Process-aware Information Systems.” Invited talk at the joint workshop on Blockchain for Information Systems (BC4IS) and Blockchain for Trusted Data Sharing (B4TDS), co-located with with the 36th International Conference on Advanced Information Systems Engineering (CAiSE), 3 June 2024, Limassol, Cyprus.
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
UiPath Test Automation using UiPath Test Suite series, part 5
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
20240609 QFM020 Irresponsible AI Reading List May 2024
Everything I found interesting about the irresponsible use of machine intelligence in May 2024
Essentials of Automations: The Art of Triggers and Actions in FME
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Building Production Ready Search Pipelines with Spark and Milvus
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.
Programming Foundation Models with DSPy - Meetup Slides
Prompting language models is hard, while programming language models is easy. In this talk, I will discuss the state-of-the-art framework DSPy for programming foundation models with its powerful optimizers and runtime constraint system.
Infrastructure Challenges in Scaling RAG with Custom AI models
Building Retrieval-Augmented Generation (RAG) systems with open-source and custom AI models is a complex task. This talk explores the challenges in productionizing RAG systems, including retrieval performance, response synthesis, and evaluation. We’ll discuss how to leverage open-source models like text embeddings, language models, and custom fine-tuned models to enhance RAG performance. Additionally, we’ll cover how BentoML can help orchestrate and scale these AI components efficiently, ensuring seamless deployment and management of RAG systems in the cloud.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
Recently uploaded (20)
GraphSummit Singapore | Enhancing Changi Airport Group's Passenger Experience...
GraphSummit Singapore | Enhancing Changi Airport Group's Passenger Experience...
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Full-RAG: A modern architecture for hyper-personalization
Full-RAG: A modern architecture for hyper-personalization
Climate Impact of Software Testing at Nordic Testing Days
Climate Impact of Software Testing at Nordic Testing Days
AI 101: An Introduction to the Basics and Impact of Artificial Intelligence
AI 101: An Introduction to the Basics and Impact of Artificial Intelligence
GraphSummit Singapore | Neo4j Product Vision & Roadmap - Q2 2024
GraphSummit Singapore | Neo4j Product Vision & Roadmap - Q2 2024
Presentation of the OECD Artificial Intelligence Review of Germany
Presentation of the OECD Artificial Intelligence Review of Germany
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for Life Science to increase LLM accuracy
UiPath Test Automation using UiPath Test Suite series, part 5
UiPath Test Automation using UiPath Test Suite series, part 5
20240609 QFM020 Irresponsible AI Reading List May 2024
20240609 QFM020 Irresponsible AI Reading List May 2024
Essentials of Automations: The Art of Triggers and Actions in FME
Essentials of Automations: The Art of Triggers and Actions in FME
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024
Building Production Ready Search Pipelines with Spark and Milvus
Building Production Ready Search Pipelines with Spark and Milvus
Programming Foundation Models with DSPy - Meetup Slides
Programming Foundation Models with DSPy - Meetup Slides
Infrastructure Challenges in Scaling RAG with Custom AI models
Infrastructure Challenges in Scaling RAG with Custom AI models
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...
Rotation I Presentation
- 1. Dechlorination of Polychlorinated Biphenyl (PCB) Congeners by Dehalococcoides By: David VanHoute First Year Graduate Student Rensselaer Polytechnic Institute 11/12/2010
Editor's Notes
- Stress need for terminal electron acceptor; specific Rdase enzymes, N and P process generally preferred.
- 36 in others
- Anoxic reagents, anaerobic chamber, crimp and purge vials, limit oxygen We know that Dehalococcoides dechlorinates mixtures of PCBs, but don’t know which congeners.
- Retention times show how long specific congeners remain on GC column. Shows where product is seen and substrate
- MV provides ample supply of H, no need for hydrogenase activity by microbes.
- Both 234 and 2345 are doubly flanked congeners, significant product with removal of meta chlorine.
- 234 and 2345 are doubly flanked chlorines that get removed, don’t really know why.