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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 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 evaluation is a quicker and extra accurate technique.
BOD evaluation is carried out to determine the influence of dirty water containing bacteria and natural material on plant and animal life when launched right into a stream or lake. ไดอะแฟรม want to soak up oxygen to interrupt down natural material (pollution) within the water. The take a look at measures the potential for the incoming water to deplete the oxygen within the receiving water due to bacterial activity.
If there are high levels of organic waste and bacteria in the water, it will have a adverse impact on the encircling ecosystem. Low levels of natural waste and less bacteria present means that BOD shall be lower and dissolved oxygen levels might be higher. the BOD check consists of obtaining an preliminary dissolved oxygen (DO) reading and a second reading after 5 days of incubation at 20 °C.
COD evaluation, on the other hand, measures the oxygen consumption capacity of a water sample contaminated with natural waste. Specifically, it measures the equivalent amount of oxygen required to chemically oxidize organic compounds within the water and thereby eliminate the contamination. COD is an integral part of all water high quality administration applications.
Almost all wastewater treatment plants must measure considered one of these two gadgets as an indicator of the air pollution value within the water. For extra water high quality indicators and related monitoring equipment for wastewater therapy, please see this article water quality sensors for water treatmet.
COD VS BOD

BODCOD

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

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

BOD is measured by preserving a sealed water pattern for incubation for a interval of 5 days at 20 degree Celsius. The reduction in dissolved oxygen offers the quantity of oxygen consumed by the aerobic organisms.In COD check, the water sample is incubated with a strong

oxidant in combination with boiling sulphuric acid for a particular time frame and temperature.
BOD value is decided by 5 days.COD may be measured

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

BOD is used to oxidize the pure

organic matter and organic waste in the waterCOD is capable of degrading the industrial sewage. COD doesn’t measure the quantity of oxygen consumed by acetates present in 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 extra about water high quality parameters:
Ammonia in wastewater

Nitrate in water high quality

Ammonia vs ammonium

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

Both COD and BOD testing strategies are designed to indicate the amount of contamination in a water sample. COD is the amount 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 evaluation is a faster and more accurate technique.
BOD analysis is performed to find out the impact of dirty water containing bacteria and organic material on plant and animal life when released right into a stream or lake. Bacteria want to soak up oxygen to interrupt down organic materials (pollution) within the water. The test measures the potential for the incoming water to deplete the oxygen in the receiving water as a end result of bacterial exercise.
If there are high levels of natural waste and bacteria in the water, it will have a negative impact on the surrounding ecosystem. Low ranges of organic waste and fewer micro organism present signifies that BOD will be lower and dissolved oxygen levels shall be higher. 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, on the other hand, measures the oxygen consumption capability of a water sample contaminated with natural waste. Specifically, it measures the equal amount of oxygen required to chemically oxidize organic compounds in the water and thereby get rid of the contamination. COD is an integral part of all water quality administration programs.
Almost all wastewater treatment vegetation must measure one of these two gadgets as an indicator of the air pollution worth in the water. For more water high quality indicators and associated monitoring gear for wastewater remedy, please see this article water quality sensors for water treatmet.
COD VS BOD

BODCOD

BOD is a organic oxidation processCOD is a chemical oxidation process

BOD is performed by cardio organismsCOD is carried out by chemical reagents

BOD is measured by preserving a sealed water pattern for incubation for a interval of 5 days at 20 degree Celsius. The discount in dissolved oxygen gives the amount of oxygen consumed by the aerobic organisms.In COD take a look at, the water sample is incubated with a powerful

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

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

BOD is used to oxidize the pure

natural matter and natural waste within the waterCOD is able to degrading the commercial sewage. COD doesn’t 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 traits of domestic wastewater

Read more about water quality parameters:
Ammonia in wastewater

Nitrate in water high quality

Ammonia vs ammonium

Solution of water air pollutionn