This document discusses the biodegradation of petrochemicals and hydrocarbons. Petrochemicals are chemicals derived from petroleum or natural gas that are used to make many products. One environmental problem is accidental releases of petroleum products from the petrochemical industry, which can pollute water and soil. There are several methods for degrading hydrocarbons, including chemical and biological degradation. Biodegradation involves microbial remediation using bacteria, fungi, and plants. The document examines the microbial degradation process and factors that influence it, such as the type of hydrocarbons, nutrients, and temperature. It concludes that microbial degradation is an important part of cleaning up spilled oil in the environment.
Hydrocarbon 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. The ability of microorganisms - bacteria, archaea, fungi, or algae - to break down hydrocarbons is the basis for natural and enhanced bioremediation. To promote biodegradation, amendments such as nitrogen and phosphorous fertilizer are often added to stimulate microbial growth and metabolism
Biodegradation or biological degradation is the phenomenon of biological transformation of organic compounds by living organisms, particularly the microorganisms.
Biodegradation basically involves the conversion of complex organic molecules to simpler (and mostly non-toxic) ones. The term biotransformation is used for incomplete biodegradation of organic compounds involving one or a few reactions. Biotransformation is employed for the synthesis of commercially important products by microorganisms.
Bioremediation refers to the process of using microorganisms to remove the environmental pollutants i.e. the toxic wastes found in soil, water, air etc. The microbes serve as scavengers in bioremediation. The removal of organic wastes by microbes for environmental clean-up is the essence of bioremediation. The other names used (by some authors) for bioremediation are bio-treatment, bio-reclamation and bio-restoration.
It is rather difficult to show any distinction between biodegradation and bioremediation. Further, in biotechnology, most of the reactions of biodegradation/bioremediation involve xenobiotic.
Hydrocarbon 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. The ability of microorganisms - bacteria, archaea, fungi, or algae - to break down hydrocarbons is the basis for natural and enhanced bioremediation. To promote biodegradation, amendments such as nitrogen and phosphorous fertilizer are often added to stimulate microbial growth and metabolism
Biodegradation or biological degradation is the phenomenon of biological transformation of organic compounds by living organisms, particularly the microorganisms.
Biodegradation basically involves the conversion of complex organic molecules to simpler (and mostly non-toxic) ones. The term biotransformation is used for incomplete biodegradation of organic compounds involving one or a few reactions. Biotransformation is employed for the synthesis of commercially important products by microorganisms.
Bioremediation refers to the process of using microorganisms to remove the environmental pollutants i.e. the toxic wastes found in soil, water, air etc. The microbes serve as scavengers in bioremediation. The removal of organic wastes by microbes for environmental clean-up is the essence of bioremediation. The other names used (by some authors) for bioremediation are bio-treatment, bio-reclamation and bio-restoration.
It is rather difficult to show any distinction between biodegradation and bioremediation. Further, in biotechnology, most of the reactions of biodegradation/bioremediation involve xenobiotic.
Exposure to lead (Pb), zinc (Zn), cadmium (Cd), copper (Cu), and selenite (SeO3−2) consider the main heavy metals that threat human health. These heavy metals can interfere with the function of vital cellular components. Soil heavy metal contamination represents risks to humans and the ecosystem through drinking of contaminated groundwater, direct ingestion or the food chain, and reduction in food quality. Bioremediation means cleanup of polluted environment via transformation of toxic heavy metals into less toxic form by microbes or its enzymes. Otherwise, bioremediation by microbes has limitations like production of toxic metabolites. The efflux of metal ions outside the cell, biosorption to the cell walls and entrapment in extracellular capsules, precipitation, and reduction of the heavy metal ions to a less toxic state are mechanisms to metals’ resistance.
Environmental Microbiology: Microbial degradation of recalcitrant compoundsTejaswini Petkar
A brief presentation on 'Microbial degradation of recalcitrant compounds'- their classes,their sources, the microorganisms involved and their modes of degradation,
ABSTRACT
INTRODUCTION
METHODOLOGY
BIOREMEDIATION OF OIL SPILLS
CASE STUDY
CONCLUSION
Subtopics
Bio remediation in hot and cold environments
Use of Nitrogen fixing Bacteria
Bio remediation using fungi from soil samples
Bio remediation using bacteria and case studies
Microbial enhanced oil recovery is one of the EOR techniques where bacteria and their by-products are utilized for oil mobilization in a reservoir.
It is the process that increases oil recovery through inoculation of microorganisms in a reservoir, aiming that bacteria and their by-products cause some beneficial effects.
Bioremediation of heavy metals pollution by Udaykumar Pankajkumar BhanushaliUdayBhanushali111
Mechanisms and techniques used for Bioremediation which includes phytoremediation, Bacterial & fungal bioremediation. Examples of heavy metal pollution
Introduction
Type of pesticides
Advantage & disadvantages of pesticides
Degradation of pesticide
Microbial degradation of pesticides
Mode of microbial metabolism of pesticides
Strategies for biodegradation
Approaches for biodegradation of pesticide
Chemical reaction leading biodegradation of pesticide
Metabolism of pesticides by MO
Metabolism of DDT
Biosensors in Environmental MonitoringSindhBiotech
This lecture is presented by our volunteer Bushra Umer, she is from Karachi, Pakistan, and she is covering "Biosensors in Environmental Monitoring"
For video: https://youtu.be/DoO2Aw7bRrk
“Bioleaching" or "bio-oxidation" employs the use of naturally occurring bacteria, harmless to both humans and the environment, to extract of metals from their ores.
Conversion of insoluble metal sulfides into water-soluble metal sulfates.
It is mainly used to recover certain metals from sulfide ores. This is much cleaner than the traditional leaching.
Exposure to lead (Pb), zinc (Zn), cadmium (Cd), copper (Cu), and selenite (SeO3−2) consider the main heavy metals that threat human health. These heavy metals can interfere with the function of vital cellular components. Soil heavy metal contamination represents risks to humans and the ecosystem through drinking of contaminated groundwater, direct ingestion or the food chain, and reduction in food quality. Bioremediation means cleanup of polluted environment via transformation of toxic heavy metals into less toxic form by microbes or its enzymes. Otherwise, bioremediation by microbes has limitations like production of toxic metabolites. The efflux of metal ions outside the cell, biosorption to the cell walls and entrapment in extracellular capsules, precipitation, and reduction of the heavy metal ions to a less toxic state are mechanisms to metals’ resistance.
Environmental Microbiology: Microbial degradation of recalcitrant compoundsTejaswini Petkar
A brief presentation on 'Microbial degradation of recalcitrant compounds'- their classes,their sources, the microorganisms involved and their modes of degradation,
ABSTRACT
INTRODUCTION
METHODOLOGY
BIOREMEDIATION OF OIL SPILLS
CASE STUDY
CONCLUSION
Subtopics
Bio remediation in hot and cold environments
Use of Nitrogen fixing Bacteria
Bio remediation using fungi from soil samples
Bio remediation using bacteria and case studies
Microbial enhanced oil recovery is one of the EOR techniques where bacteria and their by-products are utilized for oil mobilization in a reservoir.
It is the process that increases oil recovery through inoculation of microorganisms in a reservoir, aiming that bacteria and their by-products cause some beneficial effects.
Bioremediation of heavy metals pollution by Udaykumar Pankajkumar BhanushaliUdayBhanushali111
Mechanisms and techniques used for Bioremediation which includes phytoremediation, Bacterial & fungal bioremediation. Examples of heavy metal pollution
Introduction
Type of pesticides
Advantage & disadvantages of pesticides
Degradation of pesticide
Microbial degradation of pesticides
Mode of microbial metabolism of pesticides
Strategies for biodegradation
Approaches for biodegradation of pesticide
Chemical reaction leading biodegradation of pesticide
Metabolism of pesticides by MO
Metabolism of DDT
Biosensors in Environmental MonitoringSindhBiotech
This lecture is presented by our volunteer Bushra Umer, she is from Karachi, Pakistan, and she is covering "Biosensors in Environmental Monitoring"
For video: https://youtu.be/DoO2Aw7bRrk
“Bioleaching" or "bio-oxidation" employs the use of naturally occurring bacteria, harmless to both humans and the environment, to extract of metals from their ores.
Conversion of insoluble metal sulfides into water-soluble metal sulfates.
It is mainly used to recover certain metals from sulfide ores. This is much cleaner than the traditional leaching.
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere and terrestrial and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen, making it the largest pool of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.
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MECHANISM OF ANAEROBIC BIODEGRADATION new.pptxmuskanmahajan24
ANAEROBIC DEGRADATION:Anaerobic degradation is defined as the biological process that produce a gas mixture (called biogas) that contains methane (CH4) and carbon dioxide (CO2) as its primary constituents, through the concerted action of a mixed microbial population under conditions of oxygen deficiency.
Biological methane production was first noticed by Volta in 1776, who described the release of methane from a swamp.
Anaerobic digestion is most widely used and one of the oldest methods for sewage sludge stabilization.
It was first used for high-solids municipal wastewater treatment toward the end of the nineteenth century by Louis H. Mouras, who designed and constructed sewage sludge digesters in Vesoul, France.
Complete Aerobic digestion of glucose to carbon-dioxide yields up to 38 mole ATP/mole glucose while Anaerobic fermentation to mixed organic acids yields 2-4 mole ATP/mole glucose.
Microorganisms involved in degradation: Acid - forming bacteria : Clostridium sp , Corynebacterium sp , Lactobacillus sp ,Actinomycetes sp, Staphylococcus sp,Peptococcus anaerobus, Escherichia coli, Pseudomonas,Bifidobacterium, Propionibacterium, Enterobacteriaceae .
Methanogenic bacteria: Methanobacterium formicium,Methanobacterium bryantii, Methanobacterium thermoautotrophicum,Methanosarcina barkeri, Methanobrevibacte ruminantiurn,Methanobrevibacter smithii ,Methanobrevibacter arboriphilus, Methanococcus vannielii , Methanococcus thermolithotrophicus, Methanobacterium cariaci, Methanobacillus omelianskii.
Stages of Anaerobic biodegradation
Hydrolysis, Acidogenesis, Acetogenesis and Methanogenesis
Anaerobic Degradation of Carbohydrates: The anaerobic degradation of cellulose, can be divided into hydrolytic, fermentative, acetogenic and methanogenic phases.
The hydrolysis of carbohydrates proceeds favourably at a slightly acidic pH.
Hemicellulose and pectin are hydrolyzed 10 times faster than lignin-encrusted cellulose.
In the methane reactor, beta-oxidation of fatty acids,especially of propionate or n-butyrate, is the rate limiting step.
Anaerobic degradation of Proteins: Hydrolysis of precipitated or soluble protein is catalyzed by several types of proteases that cleave membrane-permeable amino acids, dipeptides, or oligopeptides.
The hydrolysis of proteins requires a neutral or weakly alkaline pH.
For complete degradadtion of amino acids in an anaerobic system , a syntrophic relationship of amino acids-fermenting anaerobic bacteria with methanogens or sulfate reducers is required.
Anaerobic degradation of Neutral fats and Lipids: Glycerol and saturated and unsaturated fatty acids(palmitic acid,linolic acid,stearic acid etc.) are formed from neutral fats.
The long chain of fatty acids are degraded by acetogenic bacteria by beta-oxidation to acetate and molecular hydrogen.
If acetate and molecular hydrogen accumulate, the anaerobic digestion process is inhibited.
Very low H2 partial pressure is mainatained by hydrogen-utilizing methanogens .
16. MICROBIOLOGY AND BIOCHEMISTRY OF BIOGAS PRODUCTION.pptRENERGISTICS
Many microorganisms affect anaerobic digestion, including acetic acid-forming bacteria (acetogens) and methane-forming archaea (methanogens). These organisms promote a number of chemical processes in converting the biomass to biogas.
Biodegradation is the chemical dissolution of materials by bacteria or other biological means.
biodegradable simply means to be consumed by microorganisms and return to compounds found in nature
Role of Microorganisms in Sewage Treatment by Usama YounasUSAMAYOUNAS11
This presentation will help to understand the various microbes involved in the sewage treatment, also included the data regarding some sewage treatment plants present in Lahore, Punjab, Pakistan
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
2. What are petrochemicals?
• Chemicals derived from petroleum or natural gas
• Major petrochemicals are acetylene, benzene,
ethane, ethylene, methane, propane, and
hydrogen
• A huge variety of products are made with
petrochemicals
• Including plastics, soaps, pharmaceuticals, fertilizers,
pesticides, detergents,
3. One of the major environmental problems
caused by HCS:
Resulting from activities of petrochemical
industry.
Accidental releases of petroleum products
HCS belong to the family of carcinogens and
neurotoxic organic pollutants
Main cause of water and soil pollution
Accumulation of pollutants in living cells may
cause death or mutations
Their removal is necessary
4. Degradation of HCS
• Several methods are utilized
Chemical degradation
Biodegradation
Biodegradation involve
Microbial remediation( effective method)
Bacterial degradation
Fungal degradation
Phytoremediation (by using plants)
5. Microbial Degradation of Petroleum
Biodegradation of HCS is a complex process depending on:
• the nature
• Amount of the hydrocarbons present
Petroleum HCS divided into four classes:
• The alephatics
• The aromatics
• The asphaltenes (phenols, fatty acids, ketones, esters, and
porphyrins),
• And the resins (pyridines, quinolines, carbazoles,
sulfoxides, and amides
Cont….
Hydrocarbons
6. The susceptibility of HCS to microbes can be
ranked:
• Linear alkanes
• Branched alkanes
• Small aromatics cyclic alkanes
• High molecular weight (PAHs)
Cont…
7. Natural mechanism for degrading HCS:
• by bacteria, yeast, and fungi
• Mix population of these microbes are more
efficient
• Bacteria are the most active agents in
petroleum degradation
8. Enzymes and microbes Participating in
Degradation of HCS
Enzymes Substrates Microorganisms References
Soluble Methane
Monooxygenases
C1–C8 alkanes alkenes and
cycloalkanes
Methylococcus
Methylomonas
McDonald et
al.
Particulate Methane
Monooxygenases
C1–C5 (halogenated) alkanes
and cycloalkanes
Methylobacter
Methylococcus
McDonald et
al.
AlkB related
Alkane
Hydroxylases
C5–C16 alkanes, fatty acids,
alkyl benzenes, cycloalkanes
Pseudomonas
Burkholderia
Rhodococcus
Mycobacterium
Jan et al.
Eukaryotic P450 C10–C16 alkanes, fatty acids Candida maltosa
Candida tropicalis
Yarrowia lipolytica
Iida et al
Bacterial P450
oxygenase system
C5–C16 alkanes, cycloalkanes Caulobacter
Mycobacterium
Iida et al
Dioxygenases C10–C30 alkanes Acinetobacter sp. Maeng et al
10. • Biosynthesis of cell biomass occurs from the
central precursor metabolites, for example,
• acetyl-CoA, succinate, pyruvate.
• Other mechanisms are
• Attachment of microbial cells to the substrates
• Production of biosurfactsants
11. Biodegradation of Petroleum compounds
11
Petroleum compounds are categorized into 2 groups
• Aliphatic hydrocarbon e.g. alkane, alcohol,
aldehyde
• Aromatic hydrocarbon e.g. benzene, phenol,
toluene, catechol
• H.C. (substrate) + O2 H.C.-OH + H2O
• H.C. (substrate) + O2 H.C.
O
H
O
H
monooxyge
nase
dioxygenase
17. • under nitrate-reducing condition : Nitrate-reducing
17
bacteria couple the oxidation of org. cpd. with
water to the exergonic reduction of nitrate via
nitrite to N2
OH OH O
Metabolic
pool
3H2 H2O
H2
COOH
CH3
18. Factors Influencing Petroleum HCS
Degradation
A number of limiting factors affect the
biodegradation of petroleum HCS
• Chemistry of HCS
• Physiological factors
• Nutrients
20. conclusion
• Cleaning up of petroleum HCS is a real world problem.
• It depends on the indigenous microorganisms to transform or
mineralize the organic contaminants.
• Microbial degradation process aids the elimination of spilled
oil from the environment after critical removal of large
amounts of the oil by various physical and chemical methods.
• This is possible because microorganisms have enzyme systems
to degrade and utilize different hydrocarbons as a source of
carbon and energy.
• Therefore, based on the present review, it may be concluded
that microbial degradation can be considered as a key
component in the cleanup strategy for petroleum
hydrocarbon remediation