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What is the distinction between chemical oxygen demand (COD) and biological oxygen demand (BOD)?

Both COD and BOD testing methods are designed to point the amount 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 strong correlation between COD and BOD, however COD analysis is a faster and more correct method.
BOD analysis is carried out to discover out the impact of dirty water containing bacteria and natural materials on plant and animal life when launched right into a stream or lake. Bacteria need to absorb oxygen to break down natural material (pollution) within the water. The take a look at measures the potential for the incoming water to deplete the oxygen in the receiving water as a outcome of bacterial exercise.
If there are high ranges of organic waste and bacteria within the water, it will have a negative impression on the surrounding ecosystem. Low levels of natural waste and less micro organism present means that BOD shall be decrease and dissolved oxygen ranges might be higher. the BOD check consists of obtaining an initial dissolved oxygen (DO) reading and a second reading after 5 days of incubation at 20 °C.
COD analysis, on the opposite hand, measures the oxygen consumption capacity of a water pattern contaminated with organic waste. Specifically, it measures the equivalent amount of oxygen required to chemically oxidize organic compounds in the water and thereby remove the contamination. COD is an integral a part of all water quality administration packages.
Almost all wastewater therapy crops need to measure one of these two objects as an indicator of the air pollution value within the water. For more water quality indicators and associated monitoring equipment for wastewater therapy, please see this article 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 maintaining a sealed water sample for incubation for a period of 5 days at 20 degree Celsius. The reduction in dissolved oxygen gives the amount of oxygen consumed by the aerobic organisms.In COD take a look at, the water pattern is incubated with a powerful

oxidant together with boiling sulphuric acid for a particular period of time and temperature.
BOD value is determined by 5 days.COD can be measured

within few days.
BOD worth is lower than CODCOD worth is all the time greater than BOD

BOD is used to oxidize the natural

natural matter and natural waste within the waterCOD is able to degrading the industrial sewage. COD doesn’t measure the amount of oxygen consumed by acetates current 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 traits of home wastewater

Read more about water high quality parameters:
Ammonia in wastewater

Nitrate in water quality

Ammonia vs ammonium

Solution of water pollutionn
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What is the distinction between chemical oxygen demand (COD) and organic oxygen demand (BOD)?

Both COD and BOD testing strategies are designed to point the amount of contamination in a water pattern. COD is the quantity of oxygen required to chemically break down contaminants, whereas BOD is the quantity of oxygen required for biodegradation by microorganisms.There is a powerful correlation between COD and BOD, but COD evaluation is a quicker and extra accurate method.
BOD evaluation is performed to find out the impression of dirty water containing micro organism and natural materials on plant and animal life when launched into a stream or lake. Bacteria want to soak up oxygen to interrupt down organic materials (pollution) in the water. The check measures the potential for the incoming water to deplete the oxygen in the receiving water due to bacterial exercise.
If there are high ranges of natural waste and bacteria in the water, it’s going to have a adverse impression on the encircling ecosystem. Low levels of natural waste and less bacteria present implies that BOD shall be decrease and dissolved oxygen levels shall be greater. the BOD test consists of acquiring an initial dissolved oxygen (DO) studying 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 equivalent amount of oxygen required to chemically oxidize natural compounds within the water and thereby get rid of the contamination. COD is an integral part of all water quality administration applications.
Almost all wastewater treatment plants have to measure considered one of these two objects 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 article water quality sensors for water treatmet.
COD VS BOD

BODCOD

BOD is a biological oxidation processCOD is a chemical oxidation process

BOD is performed by aerobic organismsCOD is carried out 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 quantity of oxygen consumed by the aerobic organisms.In COD check, the water pattern is incubated with a robust

oxidant in combination with boiling sulphuric acid for a selected time frame and temperature.
BOD worth is set by 5 days.COD may be measured

inside few days.
pressure gauge octa is lower than CODCOD value is all the time larger than BOD

BOD is used to oxidize the natural

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

COD VS BOD

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

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

BOD and COD traits of domestic wastewater

Read more about water quality parameters:
Ammonia in wastewater

Nitrate in water high quality

Ammonia vs ammonium

Solution of water pollutionn