What is the distinction 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. pressure gauge is the amount of oxygen required to chemically break down contaminants, while BOD is the quantity of oxygen required for biodegradation by microorganisms.There is a strong correlation between COD and BOD, but COD evaluation is a sooner and more correct method.
BOD evaluation is carried out to determine the impact of dirty water containing micro organism and organic material on plant and animal life when launched into a stream or lake. Bacteria need to absorb oxygen to interrupt down natural material (pollution) within the water. The check 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 ranges of natural waste and micro organism within the water, it’s going to have a negative impression on the encircling ecosystem. Low levels of organic waste and fewer bacteria current means that BOD shall be decrease and dissolved oxygen levels will be higher. the BOD check consists of obtaining an preliminary dissolved oxygen (DO) studying and a second studying after 5 days of incubation at 20 °C.
COD analysis, however, measures the oxygen consumption capability of a water pattern contaminated with natural waste. Specifically, it measures the equivalent quantity of oxygen required to chemically oxidize organic compounds in the water and thereby remove the contamination. COD is an integral a half of all water high quality management applications.
Almost all wastewater treatment vegetation have to measure one of these two items as an indicator of the air pollution worth in the water. For more water quality indicators and associated monitoring gear for wastewater therapy, please see this text water high quality sensors for water treatmet.
COD VS BOD
BODCOD
BOD is a biological oxidation processCOD is a chemical oxidation course of
BOD is carried out by cardio organismsCOD is performed by chemical reagents
BOD is measured by keeping a sealed water pattern for incubation for a interval of 5 days at 20 diploma Celsius. The reduction in dissolved oxygen gives the quantity of oxygen consumed by the cardio organisms.In COD test, the water pattern is incubated with a powerful
oxidant together with boiling sulphuric acid for a selected time period and temperature.
BOD worth is set by 5 days.COD could be measured
inside few days.
BOD worth is lower than CODCOD value is always higher than BOD
BOD is used to oxidize the natural
organic matter and natural waste in the waterCOD is capable of degrading the economic 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 traits of home wastewater
Read more about water quality parameters:
Ammonia in wastewater
Nitrate in water high 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 indicate the amount of contamination in a water pattern. 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, however COD evaluation is a quicker and extra correct methodology.
BOD analysis is performed to discover 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 need to soak up oxygen to break down organic materials (pollution) in the water. The test measures the potential for the incoming water to deplete the oxygen within the receiving water due to bacterial exercise.
If there are excessive levels of organic waste and bacteria in the water, it will have a adverse impression on the surrounding ecosystem. Low levels of organic waste and less bacteria current means that BOD shall be lower and dissolved oxygen levels shall be greater. the BOD check consists of acquiring an preliminary 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 sample contaminated with natural waste. Specifically, it measures the equal amount of oxygen required to chemically oxidize natural compounds within the water and thereby eliminate the contamination. COD is an integral part of all water quality administration programs.
Almost all wastewater treatment crops must measure considered one of these two objects as an indicator of the air pollution worth in the water. For extra water high quality indicators and related monitoring tools 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 discount in dissolved oxygen provides the amount of oxygen consumed by the cardio organisms.In COD take a look at, the water sample is incubated with a strong
oxidant in combination with boiling sulphuric acid for a particular time period and temperature.
BOD value is set by 5 days.COD may be measured
within few days.
BOD worth is decrease than CODCOD worth is always larger than BOD
BOD is used to oxidize the pure
organic matter and organic waste within the waterCOD is capable of degrading the commercial 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 extra about water high quality parameters:
Ammonia in wastewater
Nitrate in water high quality
Ammonia vs ammonium
Solution of water pollutionn