SlideShare a Scribd company logo
1 of 12
Biochemical oxygen demand(BOD)
&
Chemical oxygen demand(COD)
Biochemical oxygen demand(bod)
 What is B.O.D. ?
- Amount of oxygen required for bacteria to decompose
organic matter. ( Biodegradable )
Why we go for the testing of B.O.D. in
sewage ?
- To determine what effect dirty water and how much
bacteria and organic matter present in the sewage .
What will happen if sewage have high B.O.D. ?
- Then sewage will be in anaerobic condition.
Why B.O.D. is usually lesser than C.O.D. ?
-Because the bacteria present in sewage is only responsible for
decompose the biodegradable matter.
In normal sewage B.O.D. is
two-third of C.O.D.
Stage of Decomposition of Organic matter
- 1st stage :-In 1st stage the carbonaceous matter are oxidized.
The B.O.D. of sewage for this stage is about 90 % of total
B.O.D.
- 2nd stage :- In the 2nd stage the oxidation of nitrogenous matter
take place . It contain protein, fats , amino acids etc.
Why we are taking 5 days when performing
B.O.D. test ?
- Because 70% to 80% of organic matter will be oxidized with
in 5 days.
In India people developed this BOD test at 27 C in 3
days .
Limitation of BOD test
1) It is not prefer for industrial sewage .
2) Time duration of the test is 5 days.
3) pre-treatment is needed if the sample contain toxic waste.
4) It is essential to have high concentration of active bacteria .
Some facts related to B.O.D.
-Oxidant is microorganism.
-For drinking water B.O.D. is less than 1mg/l.
-D.O. should at least 4mg/l at time of disposal.
-Any to be discharged in natural bodies of water should have
BOD less than 20 mg/l.
B.O.D. curve
What is C.O.D. ?
- Amount of oxygen required to chemically oxidize both matter
to water and carbon dioxide.
Why we go for COD test ?
- It take less time to perform the test as compare to BOD test.
Why COD is called theoretical demand ?
-It is impossible to know the detail of organic compound present
in the sewage so, that it called theoretical demand.
which chemical oxidizing agent is used for
COD test ? Why
- Potassium dichromate .
-Cheap.
-Completely oxidize all organic matter .
- Reagent contain no hazardous metal.
- Stable for room temperature.
Which type of sewage we prefer COD test ?
- Industrial sewage which do not respond BOD test .
Advantage of COD test
- It take less time .
- COD test oxidize a wide range of chemical compound .
Disadvantage of COD test
- It is inability to differentiate the biological oxidizable and
biologically inert organic matter .
- some organic compound aren't oxidise completely which
contain carbon compound.
Prepared By:
Masud alam Ansari

More Related Content

What's hot

Biochemical oxygen demand
Biochemical oxygen demandBiochemical oxygen demand
Biochemical oxygen demandutpal sharma
 
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMANDBIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMANDAVPatel2
 
Charecteristics of wastewater
Charecteristics of wastewaterCharecteristics of wastewater
Charecteristics of wastewaterVenuri Lakshani
 
Activated Sludge Process and biological Wastewater treatment system
Activated Sludge Process and biological Wastewater treatment systemActivated Sludge Process and biological Wastewater treatment system
Activated Sludge Process and biological Wastewater treatment systemKalpesh Dankhara
 
Biological Oxygen Demand
Biological Oxygen DemandBiological Oxygen Demand
Biological Oxygen Demandsharonmak
 
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDFBiochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDFchetansingh999
 
chemical oxygen demand -analysis using APHA manual
chemical oxygen demand -analysis using APHA manualchemical oxygen demand -analysis using APHA manual
chemical oxygen demand -analysis using APHA manualSHERIN RAHMAN
 
Dissolved oxygen and its method of determination
Dissolved oxygen and its method of determinationDissolved oxygen and its method of determination
Dissolved oxygen and its method of determinationRohit Shrikhande
 
Treatment of water for drinking purpose
Treatment of water for drinking purposeTreatment of water for drinking purpose
Treatment of water for drinking purposesridevi244
 
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS Rabia Aziz
 
wastewater treatment
wastewater treatmentwastewater treatment
wastewater treatmentEzhilmathi S
 
Sludge treatment and disposal
Sludge treatment and disposalSludge treatment and disposal
Sludge treatment and disposalRomanus Peter
 

What's hot (20)

Biochemical oxygen demand
Biochemical oxygen demandBiochemical oxygen demand
Biochemical oxygen demand
 
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMANDBIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND
BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND
 
Charecteristics of wastewater
Charecteristics of wastewaterCharecteristics of wastewater
Charecteristics of wastewater
 
Waste Water Treatment
Waste Water TreatmentWaste Water Treatment
Waste Water Treatment
 
DO, BOD and COD
DO, BOD and CODDO, BOD and COD
DO, BOD and COD
 
COD &BOD&TOC& DO
COD &BOD&TOC& DOCOD &BOD&TOC& DO
COD &BOD&TOC& DO
 
Water Analysis & Test Method
Water Analysis & Test MethodWater Analysis & Test Method
Water Analysis & Test Method
 
Activated Sludge Process and biological Wastewater treatment system
Activated Sludge Process and biological Wastewater treatment systemActivated Sludge Process and biological Wastewater treatment system
Activated Sludge Process and biological Wastewater treatment system
 
Biological Oxygen Demand
Biological Oxygen DemandBiological Oxygen Demand
Biological Oxygen Demand
 
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDFBiochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
Biochemical oxygen demand (BOD) AND Chemical Oxygen Demand PDF
 
chemical oxygen demand -analysis using APHA manual
chemical oxygen demand -analysis using APHA manualchemical oxygen demand -analysis using APHA manual
chemical oxygen demand -analysis using APHA manual
 
Practical on COD
Practical on CODPractical on COD
Practical on COD
 
WASTE WATER TREATMENT
WASTE WATER TREATMENTWASTE WATER TREATMENT
WASTE WATER TREATMENT
 
Dissolved oxygen and its method of determination
Dissolved oxygen and its method of determinationDissolved oxygen and its method of determination
Dissolved oxygen and its method of determination
 
Treatment of water for drinking purpose
Treatment of water for drinking purposeTreatment of water for drinking purpose
Treatment of water for drinking purpose
 
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS
WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN & PHOSPHORUS
 
cod and Bod
cod and Bodcod and Bod
cod and Bod
 
Treatment of waste water
Treatment of waste waterTreatment of waste water
Treatment of waste water
 
wastewater treatment
wastewater treatmentwastewater treatment
wastewater treatment
 
Sludge treatment and disposal
Sludge treatment and disposalSludge treatment and disposal
Sludge treatment and disposal
 

Viewers also liked

Biochemical Oxygen Demand (BOD)
Biochemical Oxygen Demand (BOD)Biochemical Oxygen Demand (BOD)
Biochemical Oxygen Demand (BOD)pratik kulkarni
 
Chemical oxygen demand.ppsx
Chemical oxygen demand.ppsxChemical oxygen demand.ppsx
Chemical oxygen demand.ppsxAniket Agrawal
 
Biochemical Oxygen Demand and its Industrial Significance
Biochemical Oxygen Demand and its Industrial SignificanceBiochemical Oxygen Demand and its Industrial Significance
Biochemical Oxygen Demand and its Industrial SignificanceAdnan Murad Bhayo
 
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.Acmas Technologies Pvt. Ltd.
 
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDF
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDFDissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDF
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDFchetansingh999
 
Why cod is greater than bod
Why cod is greater than bodWhy cod is greater than bod
Why cod is greater than bodPrionath Roy
 
Group 6 dissolved oxygen determination ppt
Group 6 dissolved oxygen determination pptGroup 6 dissolved oxygen determination ppt
Group 6 dissolved oxygen determination pptApril Marcelino
 
BOD Analysis as per APHA Manual
BOD Analysis as per APHA ManualBOD Analysis as per APHA Manual
BOD Analysis as per APHA ManualGayathri Mohan
 
BOD Ratio Presentation
BOD Ratio PresentationBOD Ratio Presentation
BOD Ratio PresentationEdward B. Lis
 
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLEESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLESadia Rahat
 
Jumlah sampel dalam mewakili populasi dalam metode penelitian
Jumlah sampel dalam mewakili populasi dalam metode penelitianJumlah sampel dalam mewakili populasi dalam metode penelitian
Jumlah sampel dalam mewakili populasi dalam metode penelitianhelmut simamora
 
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.Acmas Technologies Pvt. Ltd.
 
The hierarchy theory view of speciation
The hierarchy theory view of speciationThe hierarchy theory view of speciation
The hierarchy theory view of speciationEmanuele Serrelli
 
Media ecology
Media ecologyMedia ecology
Media ecologyjakeob14
 
Dissolved oxygen in the river
Dissolved oxygen in the riverDissolved oxygen in the river
Dissolved oxygen in the rivereliebengston
 
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...helmut simamora
 

Viewers also liked (20)

Biochemical Oxygen Demand (BOD)
Biochemical Oxygen Demand (BOD)Biochemical Oxygen Demand (BOD)
Biochemical Oxygen Demand (BOD)
 
Bod slide
Bod slideBod slide
Bod slide
 
Bod
BodBod
Bod
 
Chemical oxygen demand.ppsx
Chemical oxygen demand.ppsxChemical oxygen demand.ppsx
Chemical oxygen demand.ppsx
 
Biochemical Oxygen Demand and its Industrial Significance
Biochemical Oxygen Demand and its Industrial SignificanceBiochemical Oxygen Demand and its Industrial Significance
Biochemical Oxygen Demand and its Industrial Significance
 
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.
Chemical Oxygen Demand (COD) Analysis System by ACMAS Technologies Pvt Ltd.
 
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDF
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDFDissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDF
Dissolved Oxygen Demand (DO) AND Chemical Oxygen Demand (COD) PDF
 
Air Pollution
Air PollutionAir Pollution
Air Pollution
 
Why cod is greater than bod
Why cod is greater than bodWhy cod is greater than bod
Why cod is greater than bod
 
Group 6 dissolved oxygen determination ppt
Group 6 dissolved oxygen determination pptGroup 6 dissolved oxygen determination ppt
Group 6 dissolved oxygen determination ppt
 
BOD Analysis as per APHA Manual
BOD Analysis as per APHA ManualBOD Analysis as per APHA Manual
BOD Analysis as per APHA Manual
 
BOD Ratio Presentation
BOD Ratio PresentationBOD Ratio Presentation
BOD Ratio Presentation
 
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLEESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
ESTIMATION OF DO, BOD AND COD IN CANAL WATER SAMPLE
 
Jumlah sampel dalam mewakili populasi dalam metode penelitian
Jumlah sampel dalam mewakili populasi dalam metode penelitianJumlah sampel dalam mewakili populasi dalam metode penelitian
Jumlah sampel dalam mewakili populasi dalam metode penelitian
 
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.
Dissolved Oxygen (DO) Meters by ACMAS Technologies Pvt Ltd.
 
The hierarchy theory view of speciation
The hierarchy theory view of speciationThe hierarchy theory view of speciation
The hierarchy theory view of speciation
 
Differential pressure measurement-Level transmiter
Differential pressure measurement-Level transmiterDifferential pressure measurement-Level transmiter
Differential pressure measurement-Level transmiter
 
Media ecology
Media ecologyMedia ecology
Media ecology
 
Dissolved oxygen in the river
Dissolved oxygen in the riverDissolved oxygen in the river
Dissolved oxygen in the river
 
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...
Tabel penghitung efisiensi proses uraian kebutuhan mikroorganisme terhadap ok...
 

Similar to Biochemical oxygen demand(bod)

Routine analysis of wastewaters quality parameters
Routine analysis of wastewaters quality parametersRoutine analysis of wastewaters quality parameters
Routine analysis of wastewaters quality parametersArvind Kumar
 
An Overview of Phenomenon of BOD and COD
An Overview of Phenomenon of BOD and CODAn Overview of Phenomenon of BOD and COD
An Overview of Phenomenon of BOD and CODIRJET Journal
 
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...Microbiology Note
 
L8- ESTIMATION OF ORGANIC CONTENT.pptx
L8- ESTIMATION OF ORGANIC CONTENT.pptxL8- ESTIMATION OF ORGANIC CONTENT.pptx
L8- ESTIMATION OF ORGANIC CONTENT.pptxPRACHI DESSAI
 
lecture on characterization 2015
lecture on characterization 2015lecture on characterization 2015
lecture on characterization 2015Manish Goyal
 
2. water pollution
2. water pollution2. water pollution
2. water pollutionZubair Awan
 
ABG_water testing lab requirements_1-1-1.pptx
ABG_water testing  lab requirements_1-1-1.pptxABG_water testing  lab requirements_1-1-1.pptx
ABG_water testing lab requirements_1-1-1.pptxssuser77047f
 
Chemical Characteristics of Wastewater
Chemical Characteristics of WastewaterChemical Characteristics of Wastewater
Chemical Characteristics of WastewaterParth Desani
 
Water pollution
Water pollution Water pollution
Water pollution mypptslide
 
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECH
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECHACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECH
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECHACQUEAU, EUREKA Cluster for Water
 
CBSE-Class 11 - Chemistry -Chapter 14-Environmental Chemistry
CBSE-Class 11 - Chemistry -Chapter 14-Environmental ChemistryCBSE-Class 11 - Chemistry -Chapter 14-Environmental Chemistry
CBSE-Class 11 - Chemistry -Chapter 14-Environmental ChemistryAarti Soni
 
suspended growth bio treatments - BOD and Nitrification
suspended growth bio treatments - BOD and Nitrificationsuspended growth bio treatments - BOD and Nitrification
suspended growth bio treatments - BOD and NitrificationSiti Nadzifah Ghazali
 
Exp. 4 & 5 COD and BOD..pptx
Exp. 4 & 5 COD and BOD..pptxExp. 4 & 5 COD and BOD..pptx
Exp. 4 & 5 COD and BOD..pptxssuserb2c0be
 

Similar to Biochemical oxygen demand(bod) (20)

Routine analysis of wastewaters quality parameters
Routine analysis of wastewaters quality parametersRoutine analysis of wastewaters quality parameters
Routine analysis of wastewaters quality parameters
 
Lecture-3.pptx
Lecture-3.pptxLecture-3.pptx
Lecture-3.pptx
 
An Overview of Phenomenon of BOD and COD
An Overview of Phenomenon of BOD and CODAn Overview of Phenomenon of BOD and COD
An Overview of Phenomenon of BOD and COD
 
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...
Difference between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand...
 
BODCOD.ppt
BODCOD.pptBODCOD.ppt
BODCOD.ppt
 
Chapter 2.pptx
Chapter 2.pptxChapter 2.pptx
Chapter 2.pptx
 
L8- ESTIMATION OF ORGANIC CONTENT.pptx
L8- ESTIMATION OF ORGANIC CONTENT.pptxL8- ESTIMATION OF ORGANIC CONTENT.pptx
L8- ESTIMATION OF ORGANIC CONTENT.pptx
 
lecture on characterization 2015
lecture on characterization 2015lecture on characterization 2015
lecture on characterization 2015
 
2. water pollution
2. water pollution2. water pollution
2. water pollution
 
ABG_water testing lab requirements_1-1-1.pptx
ABG_water testing  lab requirements_1-1-1.pptxABG_water testing  lab requirements_1-1-1.pptx
ABG_water testing lab requirements_1-1-1.pptx
 
Chemical Characteristics of Wastewater
Chemical Characteristics of WastewaterChemical Characteristics of Wastewater
Chemical Characteristics of Wastewater
 
L 16 and 17 bod
L 16 and 17 bodL 16 and 17 bod
L 16 and 17 bod
 
sewage determination by COD method
sewage determination by COD methodsewage determination by COD method
sewage determination by COD method
 
Water pollution
Water pollution Water pollution
Water pollution
 
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECH
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECHACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECH
ACQUEAU Workshop Helsinki 2015_Brokerage session_Stephen Moore_MANTECH
 
CBSE-Class 11 - Chemistry -Chapter 14-Environmental Chemistry
CBSE-Class 11 - Chemistry -Chapter 14-Environmental ChemistryCBSE-Class 11 - Chemistry -Chapter 14-Environmental Chemistry
CBSE-Class 11 - Chemistry -Chapter 14-Environmental Chemistry
 
suspended growth bio treatments - BOD and Nitrification
suspended growth bio treatments - BOD and Nitrificationsuspended growth bio treatments - BOD and Nitrification
suspended growth bio treatments - BOD and Nitrification
 
Exp. 4 & 5 COD and BOD..pptx
Exp. 4 & 5 COD and BOD..pptxExp. 4 & 5 COD and BOD..pptx
Exp. 4 & 5 COD and BOD..pptx
 
R8161-Treatmentplants
R8161-TreatmentplantsR8161-Treatmentplants
R8161-Treatmentplants
 
Bod types
Bod typesBod types
Bod types
 

More from Masud Alam Ansari

Civil Internship Presentation
Civil Internship Presentation Civil Internship Presentation
Civil Internship Presentation Masud Alam Ansari
 
CIvil Engineering Training Report
CIvil Engineering Training Report CIvil Engineering Training Report
CIvil Engineering Training Report Masud Alam Ansari
 
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...Masud Alam Ansari
 
Energy Efficeint and Eco-friendly Building
Energy Efficeint and Eco-friendly Building Energy Efficeint and Eco-friendly Building
Energy Efficeint and Eco-friendly Building Masud Alam Ansari
 
Energy Efficient and Eco-friendly Building
Energy Efficient and Eco-friendly Building Energy Efficient and Eco-friendly Building
Energy Efficient and Eco-friendly Building Masud Alam Ansari
 
Water supply & waste water
Water supply & waste waterWater supply & waste water
Water supply & waste waterMasud Alam Ansari
 

More from Masud Alam Ansari (13)

Civil Internship Presentation
Civil Internship Presentation Civil Internship Presentation
Civil Internship Presentation
 
CIvil Engineering Training Report
CIvil Engineering Training Report CIvil Engineering Training Report
CIvil Engineering Training Report
 
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...
Major Ingredients and Raw materials of Ordinary concrete including Optimum wa...
 
Energy Efficeint and Eco-friendly Building
Energy Efficeint and Eco-friendly Building Energy Efficeint and Eco-friendly Building
Energy Efficeint and Eco-friendly Building
 
Maturity model
Maturity modelMaturity model
Maturity model
 
Child labour in nepal
Child labour in nepalChild labour in nepal
Child labour in nepal
 
Industrial accident
Industrial accidentIndustrial accident
Industrial accident
 
The factories Act 1948
The factories Act 1948The factories Act 1948
The factories Act 1948
 
Energy Efficient and Eco-friendly Building
Energy Efficient and Eco-friendly Building Energy Efficient and Eco-friendly Building
Energy Efficient and Eco-friendly Building
 
Earthquake and tsunami
Earthquake and tsunami Earthquake and tsunami
Earthquake and tsunami
 
Water supply & waste water
Water supply & waste waterWater supply & waste water
Water supply & waste water
 
Concreting operation
Concreting operationConcreting operation
Concreting operation
 
Electrochemistry 1
Electrochemistry 1Electrochemistry 1
Electrochemistry 1
 

Recently uploaded

"Solid waste Fill Site Analysis: Proximities & Parameters"
"Solid waste Fill Site Analysis: Proximities & Parameters""Solid waste Fill Site Analysis: Proximities & Parameters"
"Solid waste Fill Site Analysis: Proximities & Parameters"KeerthireddyNussi
 
Monitoring songbirds' online market
Monitoring songbirds' online market Monitoring songbirds' online market
Monitoring songbirds' online market CIFOR-ICRAF
 
The Dark Cloud of Global Air Pollution - Epcon
The Dark Cloud of Global Air Pollution - EpconThe Dark Cloud of Global Air Pollution - Epcon
The Dark Cloud of Global Air Pollution - EpconEpconLP
 
Item 8. Developing EPOC's PWB related to adaptation
Item 8. Developing EPOC's PWB related to adaptationItem 8. Developing EPOC's PWB related to adaptation
Item 8. Developing EPOC's PWB related to adaptationOECD Environment
 
How Long Does It Take Jackfruit To Bear Fruit?
How Long Does It Take Jackfruit To Bear Fruit?How Long Does It Take Jackfruit To Bear Fruit?
How Long Does It Take Jackfruit To Bear Fruit?EvergladesFarm
 
4th Earthquake Drill Narraative Report.docx
4th Earthquake Drill Narraative Report.docx4th Earthquake Drill Narraative Report.docx
4th Earthquake Drill Narraative Report.docxJeneroseBaldoza
 
Item 6. Revision and consolidation of energy-related legal instruments
Item 6. Revision and consolidation of energy-related legal instrumentsItem 6. Revision and consolidation of energy-related legal instruments
Item 6. Revision and consolidation of energy-related legal instrumentsOECD Environment
 
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdfweADAPT
 
Ecosystem and their types ||Environmental Science||.pdf
Ecosystem and their types ||Environmental Science||.pdfEcosystem and their types ||Environmental Science||.pdf
Ecosystem and their types ||Environmental Science||.pdfMUKUL GAUR
 
How do TOPCon Solar Cells/Solar Panel Work?
How do TOPCon Solar Cells/Solar Panel Work?How do TOPCon Solar Cells/Solar Panel Work?
How do TOPCon Solar Cells/Solar Panel Work?Bluebird Solar Pvt. Ltd.
 
Pathways to sustainable trade and system dynamic simulation
Pathways to sustainable trade and system dynamic simulationPathways to sustainable trade and system dynamic simulation
Pathways to sustainable trade and system dynamic simulationCIFOR-ICRAF
 
EC-funded Projects and CAPs Webinar slides
EC-funded Projects and CAPs Webinar slidesEC-funded Projects and CAPs Webinar slides
EC-funded Projects and CAPs Webinar slidesweADAPT
 
Exploring the snake evolution (wild's gravity).pdf
Exploring the snake evolution (wild's gravity).pdfExploring the snake evolution (wild's gravity).pdf
Exploring the snake evolution (wild's gravity).pdfdrsk203
 
Save the Environment - Environ Craft
Save the Environment -     Environ CraftSave the Environment -     Environ Craft
Save the Environment - Environ Craftenvironcraft
 
Item 7. Discussion on PWB 2023-24 work related to adaptation
Item 7. Discussion on PWB 2023-24 work related to adaptationItem 7. Discussion on PWB 2023-24 work related to adaptation
Item 7. Discussion on PWB 2023-24 work related to adaptationOECD Environment
 
Green Horizons: Ecotourism Conference 2024 in Amsterdam
Green Horizons: Ecotourism Conference 2024 in AmsterdamGreen Horizons: Ecotourism Conference 2024 in Amsterdam
Green Horizons: Ecotourism Conference 2024 in AmsterdamDIGITALCONFEX
 
Supporting Farmer Transition to Produce Deforestation-Free Coffee
Supporting Farmer Transition to Produce Deforestation-Free CoffeeSupporting Farmer Transition to Produce Deforestation-Free Coffee
Supporting Farmer Transition to Produce Deforestation-Free CoffeeCIFOR-ICRAF
 
Capacity Building in oil palm trade and sustainability
Capacity Building in oil palm trade and sustainabilityCapacity Building in oil palm trade and sustainability
Capacity Building in oil palm trade and sustainabilityCIFOR-ICRAF
 
Purva Tranquillity best living place in East Bangalore
Purva Tranquillity best living place in East BangalorePurva Tranquillity best living place in East Bangalore
Purva Tranquillity best living place in East BangaloreNikki Harris
 

Recently uploaded (20)

"Solid waste Fill Site Analysis: Proximities & Parameters"
"Solid waste Fill Site Analysis: Proximities & Parameters""Solid waste Fill Site Analysis: Proximities & Parameters"
"Solid waste Fill Site Analysis: Proximities & Parameters"
 
Monitoring songbirds' online market
Monitoring songbirds' online market Monitoring songbirds' online market
Monitoring songbirds' online market
 
The Dark Cloud of Global Air Pollution - Epcon
The Dark Cloud of Global Air Pollution - EpconThe Dark Cloud of Global Air Pollution - Epcon
The Dark Cloud of Global Air Pollution - Epcon
 
Item 8. Developing EPOC's PWB related to adaptation
Item 8. Developing EPOC's PWB related to adaptationItem 8. Developing EPOC's PWB related to adaptation
Item 8. Developing EPOC's PWB related to adaptation
 
How Long Does It Take Jackfruit To Bear Fruit?
How Long Does It Take Jackfruit To Bear Fruit?How Long Does It Take Jackfruit To Bear Fruit?
How Long Does It Take Jackfruit To Bear Fruit?
 
4th Earthquake Drill Narraative Report.docx
4th Earthquake Drill Narraative Report.docx4th Earthquake Drill Narraative Report.docx
4th Earthquake Drill Narraative Report.docx
 
Item 6. Revision and consolidation of energy-related legal instruments
Item 6. Revision and consolidation of energy-related legal instrumentsItem 6. Revision and consolidation of energy-related legal instruments
Item 6. Revision and consolidation of energy-related legal instruments
 
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf
07.02.2024_Master-slide-deck_EU-funded-projects-European-CAPs-webinar.pptx.pdf
 
International Day of Forests 2024
International Day of Forests 2024International Day of Forests 2024
International Day of Forests 2024
 
Ecosystem and their types ||Environmental Science||.pdf
Ecosystem and their types ||Environmental Science||.pdfEcosystem and their types ||Environmental Science||.pdf
Ecosystem and their types ||Environmental Science||.pdf
 
How do TOPCon Solar Cells/Solar Panel Work?
How do TOPCon Solar Cells/Solar Panel Work?How do TOPCon Solar Cells/Solar Panel Work?
How do TOPCon Solar Cells/Solar Panel Work?
 
Pathways to sustainable trade and system dynamic simulation
Pathways to sustainable trade and system dynamic simulationPathways to sustainable trade and system dynamic simulation
Pathways to sustainable trade and system dynamic simulation
 
EC-funded Projects and CAPs Webinar slides
EC-funded Projects and CAPs Webinar slidesEC-funded Projects and CAPs Webinar slides
EC-funded Projects and CAPs Webinar slides
 
Exploring the snake evolution (wild's gravity).pdf
Exploring the snake evolution (wild's gravity).pdfExploring the snake evolution (wild's gravity).pdf
Exploring the snake evolution (wild's gravity).pdf
 
Save the Environment - Environ Craft
Save the Environment -     Environ CraftSave the Environment -     Environ Craft
Save the Environment - Environ Craft
 
Item 7. Discussion on PWB 2023-24 work related to adaptation
Item 7. Discussion on PWB 2023-24 work related to adaptationItem 7. Discussion on PWB 2023-24 work related to adaptation
Item 7. Discussion on PWB 2023-24 work related to adaptation
 
Green Horizons: Ecotourism Conference 2024 in Amsterdam
Green Horizons: Ecotourism Conference 2024 in AmsterdamGreen Horizons: Ecotourism Conference 2024 in Amsterdam
Green Horizons: Ecotourism Conference 2024 in Amsterdam
 
Supporting Farmer Transition to Produce Deforestation-Free Coffee
Supporting Farmer Transition to Produce Deforestation-Free CoffeeSupporting Farmer Transition to Produce Deforestation-Free Coffee
Supporting Farmer Transition to Produce Deforestation-Free Coffee
 
Capacity Building in oil palm trade and sustainability
Capacity Building in oil palm trade and sustainabilityCapacity Building in oil palm trade and sustainability
Capacity Building in oil palm trade and sustainability
 
Purva Tranquillity best living place in East Bangalore
Purva Tranquillity best living place in East BangalorePurva Tranquillity best living place in East Bangalore
Purva Tranquillity best living place in East Bangalore
 

Biochemical oxygen demand(bod)

  • 3.  What is B.O.D. ? - Amount of oxygen required for bacteria to decompose organic matter. ( Biodegradable ) Why we go for the testing of B.O.D. in sewage ? - To determine what effect dirty water and how much bacteria and organic matter present in the sewage .
  • 4. What will happen if sewage have high B.O.D. ? - Then sewage will be in anaerobic condition. Why B.O.D. is usually lesser than C.O.D. ? -Because the bacteria present in sewage is only responsible for decompose the biodegradable matter. In normal sewage B.O.D. is two-third of C.O.D.
  • 5. Stage of Decomposition of Organic matter - 1st stage :-In 1st stage the carbonaceous matter are oxidized. The B.O.D. of sewage for this stage is about 90 % of total B.O.D. - 2nd stage :- In the 2nd stage the oxidation of nitrogenous matter take place . It contain protein, fats , amino acids etc.
  • 6. Why we are taking 5 days when performing B.O.D. test ? - Because 70% to 80% of organic matter will be oxidized with in 5 days. In India people developed this BOD test at 27 C in 3 days . Limitation of BOD test 1) It is not prefer for industrial sewage . 2) Time duration of the test is 5 days. 3) pre-treatment is needed if the sample contain toxic waste. 4) It is essential to have high concentration of active bacteria .
  • 7. Some facts related to B.O.D. -Oxidant is microorganism. -For drinking water B.O.D. is less than 1mg/l. -D.O. should at least 4mg/l at time of disposal. -Any to be discharged in natural bodies of water should have BOD less than 20 mg/l.
  • 9. What is C.O.D. ? - Amount of oxygen required to chemically oxidize both matter to water and carbon dioxide. Why we go for COD test ? - It take less time to perform the test as compare to BOD test. Why COD is called theoretical demand ? -It is impossible to know the detail of organic compound present in the sewage so, that it called theoretical demand.
  • 10. which chemical oxidizing agent is used for COD test ? Why - Potassium dichromate . -Cheap. -Completely oxidize all organic matter . - Reagent contain no hazardous metal. - Stable for room temperature. Which type of sewage we prefer COD test ? - Industrial sewage which do not respond BOD test .
  • 11. Advantage of COD test - It take less time . - COD test oxidize a wide range of chemical compound . Disadvantage of COD test - It is inability to differentiate the biological oxidizable and biologically inert organic matter . - some organic compound aren't oxidise completely which contain carbon compound.