What is the difference between chemical oxygen demand (COD) and organic oxygen demand (BOD)?

Both COD and BOD testing methods are designed to point the quantity of contamination in a water pattern. COD is the amount of oxygen required to chemically break down contaminants, whereas BOD is the amount of oxygen required for biodegradation by microorganisms.There is a strong correlation between COD and BOD, but COD analysis is a quicker and more accurate technique.
BOD evaluation is carried out to determine the impact of dirty water containing micro organism and organic materials on plant and animal life when released right into a stream or lake. Bacteria want to absorb oxygen to interrupt down natural materials (pollution) within the water. The test measures the potential for the incoming water to deplete the oxygen within the receiving water as a end result of bacterial exercise.
If there are pressure gauge ยี่ห้อ tk of organic waste and micro organism in the water, it’s going to have a adverse influence on the encompassing ecosystem. Low ranges of natural waste and fewer micro organism present means that BOD shall be lower and dissolved oxygen ranges shall be larger. the BOD test consists of obtaining an initial dissolved oxygen (DO) reading and a second studying after 5 days of incubation at 20 °C.
COD analysis, however, measures the oxygen consumption capacity of a water pattern contaminated with natural waste. Specifically, it measures the equal amount of oxygen required to chemically oxidize natural compounds within the water and thereby get rid of the contamination. COD is an integral a part of all water quality administration packages.
Almost all wastewater treatment crops need to measure considered one of these two gadgets as an indicator of the pollution worth within the water. For extra water quality indicators and associated monitoring equipment for wastewater treatment, please see this text water quality sensors for water treatmet.
COD VS BOD

BODCOD

BOD is a biological oxidation processCOD is a chemical oxidation course of

BOD is performed by aerobic organismsCOD is performed by chemical reagents

BOD is measured by preserving a sealed water pattern for incubation for a period of 5 days at 20 degree Celsius. The discount in dissolved oxygen gives the amount of oxygen consumed by the cardio organisms.In COD test, the water pattern is incubated with a strong

oxidant together with boiling sulphuric acid for a specific period of time and temperature.
BOD worth is decided by 5 days.COD could be measured

within few days.
BOD worth is lower than CODCOD value is always greater than BOD

BOD is used to oxidize the natural

organic matter and organic waste within the waterCOD is able to degrading the industrial sewage. COD does not measure the quantity of oxygen consumed by acetates present within the water pattern

COD VS BOD

ClassificationBOD (mg/l )COD (mg/l )

Weak<200<400 Medium350700 Strong5001000 Very Strong>750>1500

BOD and COD characteristics of domestic wastewater

Read extra about water high quality parameters:
Ammonia in wastewater

Nitrate in water quality

Ammonia vs ammonium

Solution of water air pollutionn
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What is the difference between chemical oxygen demand (COD) and biological oxygen demand (BOD)?

Both COD and BOD testing methods are designed to point the quantity of contamination in a water sample. COD is the quantity of oxygen required to chemically break down contaminants, while BOD is the amount of oxygen required for biodegradation by microorganisms.There is a robust correlation between COD and BOD, but COD analysis is a faster and more accurate technique.
BOD analysis is carried out to determine the impression of dirty water containing bacteria and organic material on plant and animal life when launched right into a stream or lake. Bacteria need to soak up oxygen to interrupt down natural material (pollution) in the water. The test measures the potential for the incoming water to deplete the oxygen within the receiving water due to bacterial activity.
If there are excessive ranges of natural waste and bacteria in the water, it will have a unfavorable impression on the encircling ecosystem. Low ranges of natural waste and fewer micro organism current signifies that BOD will be lower and dissolved oxygen levels might be greater. the BOD test consists of obtaining an initial dissolved oxygen (DO) reading and a second reading after 5 days of incubation at 20 °C.
COD evaluation, on the opposite hand, measures the oxygen consumption capability of a water pattern contaminated with natural waste. Specifically, it measures the equal amount of oxygen required to chemically oxidize organic compounds in the water and thereby eliminate the contamination. COD is an integral a half of all water quality administration applications.
Almost all wastewater remedy crops have to measure one of these two items as an indicator of the pollution value within the water. For extra water high quality indicators and associated monitoring equipment for wastewater treatment, please see this article water high quality sensors for water treatmet.
COD VS BOD

BODCOD

BOD is a organic oxidation processCOD is a chemical oxidation process

BOD is carried out by aerobic organismsCOD is carried out by chemical reagents

BOD is measured by maintaining a sealed water pattern for incubation for a period of 5 days at 20 diploma Celsius. The discount in dissolved oxygen offers the quantity of oxygen consumed by the cardio organisms.In COD check, the water pattern is incubated with a robust

oxidant together with boiling sulphuric acid for a selected time frame and temperature.
BOD worth is determined by 5 days.COD could be measured

inside few days.
BOD worth is decrease than CODCOD value is at all times higher than BOD

BOD is used to oxidize the pure

organic matter and organic waste within the waterCOD is capable of degrading the economic sewage. COD does not measure the amount of oxygen consumed by acetates current in the water sample

COD VS BOD

ClassificationBOD (mg/l )COD (mg/l )

Weak<200<400 Medium350700 Strong5001000 Very Strong>750>1500

BOD and COD characteristics of domestic wastewater

Read extra about water high quality parameters:
Ammonia in wastewater

Nitrate in water quality

Ammonia vs ammonium

Solution of water pollutionn