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 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 powerful correlation between COD and BOD, however COD evaluation is a sooner and more accurate technique.
BOD analysis is performed to discover out the impact of dirty water containing micro organism and organic material on plant and animal life when released right into a stream or lake. Bacteria want to absorb oxygen to break down organic material (pollution) in the water. The check measures the potential for the incoming water to deplete the oxygen within the receiving water due to bacterial exercise.
If there are high levels of organic waste and micro organism in the water, it’s going to have a unfavorable influence on the encompassing ecosystem. Low ranges of organic waste and less bacteria current implies that BOD shall be decrease and dissolved oxygen levels shall be greater. the BOD take a look at consists of obtaining an preliminary dissolved oxygen (DO) reading and a second studying after 5 days of incubation at 20 °C.
COD evaluation, on the opposite 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 remove the contamination. pressure gauge หลักการ ทํา งาน is an integral part of all water quality management programs.
Almost all wastewater treatment plants have to measure certainly one of these two items as an indicator of the air pollution value within the water. For more water high quality indicators and associated monitoring tools for wastewater remedy, 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 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 offers the amount of oxygen consumed by the aerobic organisms.In COD take a look at, the water sample is incubated with a strong
oxidant together with boiling sulphuric acid for a particular period of time and temperature.
BOD worth is determined by 5 days.COD could be measured
within few days.
BOD value is decrease than CODCOD value is at all times greater than BOD
BOD is used to oxidize the natural
natural matter and natural waste in the waterCOD is capable of degrading the commercial sewage. COD does not measure the amount 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 domestic wastewater
Read extra about water high 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 distinction between chemical oxygen demand (COD) and organic oxygen demand (BOD)?
Both COD and BOD testing strategies are designed to indicate the amount of contamination in a water pattern. COD is the amount 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, however COD analysis is a quicker and extra accurate methodology.
BOD evaluation is carried out to find out the influence of dirty water containing bacteria and organic materials on plant and animal life when released right into a stream or lake. Bacteria need to absorb oxygen to interrupt down organic material (pollution) within the water. The check 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 excessive levels of organic waste and micro organism within the water, it’ll have a unfavorable impact on the encompassing ecosystem. Low ranges of organic waste and less micro organism current signifies that BOD will be lower and dissolved oxygen levels might be higher. the BOD test consists of obtaining an initial dissolved oxygen (DO) studying and a second reading after 5 days of incubation at 20 °C.
COD evaluation, then again, measures the oxygen consumption capacity of a water pattern contaminated with natural waste. Specifically, it measures the equal quantity of oxygen required to chemically oxidize natural compounds within the water and thereby eliminate the contamination. COD is an integral a part of all water high quality administration programs.
Almost all wastewater treatment plants have to measure considered one of these two objects as an indicator of the pollution worth in the water. For extra 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 organic oxidation processCOD is a chemical oxidation process
BOD is carried out by aerobic organismsCOD is performed by chemical reagents
BOD is measured by keeping a sealed water sample for incubation for a period 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 pattern is incubated with a powerful
oxidant together with boiling sulphuric acid for a specific time period and temperature.
BOD value is set by 5 days.COD could be measured
within few days.
BOD value is decrease than CODCOD value is at all times higher than BOD
BOD is used to oxidize the natural
natural matter and natural waste in the waterCOD is able to degrading the commercial sewage. COD does not measure the amount 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 characteristics of domestic wastewater
Read more about water high quality parameters:
Ammonia in wastewater
Nitrate in water high quality
Ammonia vs ammonium
Solution of water air pollutionn