What is the distinction between chemical oxygen demand (COD) and organic oxygen demand (BOD)?
Both COD and BOD testing methods are designed to indicate 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, but COD evaluation is a quicker and extra correct method.
BOD evaluation is carried out to discover out the impression of dirty water containing bacteria and organic materials on plant and animal life when released into a stream or lake. Bacteria want to absorb oxygen to interrupt down organic materials (pollution) within the water. The take a look at measures the potential for the incoming water to deplete the oxygen in the receiving water because of bacterial activity.
If there are excessive levels of organic waste and micro organism in the water, it will have a negative impression on the encompassing ecosystem. Low ranges of organic waste and less micro organism current implies that BOD will be lower and dissolved oxygen levels shall be higher. the BOD take a look at consists of acquiring an initial dissolved oxygen (DO) reading and a second studying after 5 days of incubation at 20 °C.
COD analysis, then again, measures the oxygen consumption capability of a water pattern contaminated with organic waste. Specifically, it measures the equivalent amount of oxygen required to chemically oxidize natural compounds in the water and thereby get rid of the contamination. COD is an integral a half of all water high quality administration applications.
Almost all wastewater treatment vegetation have to measure certainly one of these two gadgets as an indicator of the pollution value within the water. For extra water high quality indicators and related monitoring gear for wastewater remedy, please see this article 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 performed by cardio organismsCOD is performed by chemical reagents
BOD is measured by preserving a sealed water sample for incubation for a period of 5 days at 20 degree Celsius. The reduction in dissolved oxygen offers the amount of oxygen consumed by the aerobic organisms.In COD take a look at, the water pattern is incubated with a powerful
oxidant in combination with boiling sulphuric acid for a specific period of time and temperature.
BOD value is determined by 5 days.COD could be measured
inside few days.
BOD value is lower than CODCOD worth is always higher than BOD
BOD is used to oxidize the natural
organic matter and natural waste within the waterCOD is capable of degrading the commercial 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 quality parameters:
Ammonia in wastewater
Nitrate in water high quality
Ammonia vs ammonium
Solution of water pollutionn
Don’t allow #keyword# to drive you insane due to fear or not knowing where you need to start. We’ve supplied you with loads of things which can help you and now it is simply a matter of actually determining to invest all of your attention to this issue. Ordinarily the first step is the most difficult one for folks to take but always remind yourself that information doesn’t actually help you unless you in fact utilize it. There is no need to do everything perfectly, but when you actually start to work you are going to see that things are quite a lot easier. You ought to definitely, for instance, invest some time looking through #links# and taking in the essential information it has to offer.
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 amount of contamination in a water sample. COD 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 analysis is a quicker and extra correct technique.
BOD analysis is carried out to discover out the impact of soiled water containing micro organism and natural material on plant and animal life when launched right into a stream or lake. Bacteria need to absorb oxygen to interrupt down organic materials (pollution) within the water. The test measures the potential for the incoming water to deplete the oxygen within the receiving water because of bacterial exercise.
If there are high levels of organic waste and bacteria in the water, it will have a negative impression on the encircling ecosystem. Low levels of organic waste and less bacteria present signifies that BOD will be decrease and dissolved oxygen ranges shall be greater. the BOD take a look at consists of acquiring an preliminary dissolved oxygen (DO) studying and a second studying after 5 days of incubation at 20 °C.
COD analysis, then again, measures the oxygen consumption capability of a water sample contaminated with natural waste. Specifically, it measures the equivalent quantity of oxygen required to chemically oxidize organic compounds within the water and thereby remove the contamination. COD is an integral a part of all water high quality management applications.
Almost all wastewater therapy vegetation have to measure considered one of these two items as an indicator of the air pollution worth within the water. For extra water high quality indicators and related monitoring gear 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 performed by aerobic organismsCOD is performed by chemical reagents
BOD is measured by preserving a sealed water pattern for incubation for a interval of 5 days at 20 diploma Celsius. ตัววัดแรงดัน in dissolved oxygen gives the amount of oxygen consumed by the cardio organisms.In COD take a look at, the water sample is incubated with a robust
oxidant in combination with boiling sulphuric acid for a specific time frame and temperature.
BOD value is decided by 5 days.COD may be measured
inside few days.
BOD value is lower than CODCOD value is at all times higher than BOD
BOD is used to oxidize the natural
organic matter and natural waste within the waterCOD is capable of degrading the economic sewage. COD doesn’t 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 more about water quality parameters:
Ammonia in wastewater
Nitrate in water high quality
Ammonia vs ammonium
Solution of water air pollutionn