What is the difference between BOD & COD?

What is the difference between BOD & COD?

The main difference between BOD and COD is that BOD is the amount of oxygen which is consumed by bacteria while decomposing organic matter under aerobic conditions whereas COD is the amount of oxygen required for the chemical oxidation of total organic matter in water.

What is the difference between BOD and BOD?

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What is the difference between BOD COD and TOD?

The most popular sum parameter in waste water analysis are the BOD (biochemical oxygen demand), COD (chemical oxygen demand), TOD (total oxygen demand) and TOC (total organic carbon). The other parameters are based on oxygen, which is required to reduce or to oxidise the samples’ substances.

Which is more accurate BOD or COD?

COD is the amount of oxygen required to chemically breakdown the pollutants whereas BOD is the amount of oxygen required to do this biologically through micro-organisms. There is a strong correlation between COD and BOD, however COD analysis is a much faster and more accurate method.

What is COD BOD ratio?

The ratio COD/BOD is defined as the portion of biodegradable organics compared to total (bio + non bio) degradable organics. This ratio is generally greater than 1, but can be equal to 1 if sample has only biodegradable organics.

Why is COD important?

In wastewater treatment, the Chemical Oxygen Demand (COD) is an important measurement for the amount of oxygen that is required to break down pollutants (organic substances) in water. Compared to off-line measurement this method is much quicker providing an easier way to analyse the chemical oxygen demand.

What is BOD COD ratio?

BOD is oxygen demand for oxidation of organic matter by micro organism. COD is oxygen demand for oxidation of organic and non biodegradable organic matter. In domestic waste the ratio between BOD/COD is 1:2. The COD/BOD ratio is useful for assessing the amount of sewage available for biological treatment.

Is COD less than BOD?

COD stands for ‘Chemical Oxygen Demand’ where BOD stands for Biochemical Oxygen Demand. COD is normally higher than BOD because more organic compounds can be chemically oxidised than biologically oxidised.

What is the relationship between BOD, COD and TOC?

COD or Chemical Oxygen Demand is the total measurement of all chemicals in the water that can be oxidized. TOC or Total Organic Carbon is the measurement of organic carbons. BOD or Biological Oxygen Demand is supposed to measure the amount of food (or organic carbons) that bacteria can oxidize.

What is BOD and cod?

The main difference between BOD and COD is that BOD is the amount of oxygen which is consumed by bacteria while decomposing organic matter under aerobic conditions whereas COD is the amount of oxygen required for the chemical oxidation of total organic matter in water.

Do, BOD and cod?

BOD and COD are two measurements which describe the demand of DO by bacteria in the water . BOD refers to the biochemical oxygen demand and COD is the chemical oxygen demand.

What is the difference between scrod and Haddock?

As nouns the difference between haddock and scrod is that haddock is a marine fish, melanogrammus aeglefinus , of the north atlantic, important as a food fish while scrod is (new england|sometimes|new york) any cod, pollock, haddock, or other whitefish. (nonstandard|new england|humorous) (screw).