difference between bod and cod

- 5 191 B Cubic Fit Cubic equation is fitted for the observed behaviour of BOD as a function of COD. The rate at which organisms use oxygen in the sample while stabilizing organic matter.

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Total soluble COD Total BOD5 SS BOD5 x 24 12 20 x 05 x 24 48 mgL O2.

. Industrial sewage is only degraded by COD. Quality of a given water sample depends on some variable factors. BOD 0386 COD07645The following points can be noted from the abvove graphThe average error in predicting the BOD is 527The standard deviation observed is 589The graph shows equal deviation in entire range of COD.

COD or Chemical Oxygen Demand is the total measurement of all chemicals in the water that can be oxidized. Total BOD5 about 12 mgL O2 TSS concentration 20 mgL multiplied by a factor of 24. What does BOD COD and TOC stand for.

BOD usually takes 5 days and TOC used to require large expensive pieces of equipment that could measure. BOD- Biochemical Oxygen Demand is supposed to measure the amount of food or organic carbons that bacteria can oxidize. It measures oxygen taken up by the bacteria during the oxidation of organic matter.

BOD means biochemical oxygen demand And COD means chemical oxygen demand Simply explain BOD- the water pollution by organic waste in terms of biochemical oxygen demand. It is the amount of dissolved oxygen needed by bacteria in decomposing the organic waste presen. A full explanation of any of the parameters can be found by clicking on the blue links.

COD stands for the quantity of oxygen needed to oxidise total organic matter in water. Soluble BOD or COD will always be a fraction of the total unfiltered test. CBOD measures DO depletion from only carbonaceous sources.

The key difference between BOD and COD is that the BOD is the oxygen demand of microorganisms to oxidize organic matter in the water under aerobic conditions while the COD is the oxygen demand to oxidize all the pollutants in the water chemically. Hydraulic drilling at some biological filters. This distinguishes particulate vs readily available food.

COD stands for Chemical Oxidation Degradation. If BOD is too lower compared to COD then the sample can be visualized as toxic although its not confirmation. BOD value is lower than the COD value.

The COD is less specific than BOD as it measures the oxygen consumption for any pollutant that can be chemically oxidized versus BOD which is only that portion which is biodegradable. The test usually runs for a five-day period but can run 7 or 10 days as well depending on specific sample circumstances. 2-Decomposition BOD is a term that refers to a biological oxidation process.

COD value is always greater than the BOD value. Therefore the more organic material can be oxidized by COD. Carbonaceous Biochemical Oxygen Demand CBOD Carbonaceous BOD is a subset of BOD.

Answer 1 of 3. COD is closely related to BOD or Biochemical Oxygen Demand the difference being that BOD is a test of the level of organic matter that can be biologically oxidised while COD is a test of the amount of organic matter that can be chemically oxidised. BOD Biochemical Oxygen Demand.

There is a strong correlation between COD and BOD however COD analysis is a much faster and more accurate method. To determine the soluble biodegradable COD at the municipal plant outlet the. In general BOD to COD ration is.

COD is usually a measurement of chemicals and the test is simple and easy to perform with the right equipment and can be done in 2 hours. 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. TOC or Total Organic Carbon is the measurement of organic carbons.

Vacuum filter for removing particulates. Regulators may assign either BOD or CBOD or both to wastewater treatment facilities. BOD results are based on DO depletion from both carbonaceous and nitrogenous actors in a wastewater sample.

1-Definition BOD stands for the amount of oxygen required by bacteria during the aerobic decomposition of organic materials. COD should always measure higher than TOC and then BOD. NPDES permits for our wastewater treatment plants have specifications for all three variables DO BOD and COD and frequent measurements are required.

Biological oxidation is capable of oxidizing natural organic detritus and organic waste in the water. The biochemical oxygen demand BOD test tries to closely model an aerobic wastewater treatment system and the natural aquatic ecosystem. Increased BOD conductivity decreased COD pH hardness alkalinity and significant release of SO 42- confirm the mineralization of the polluted water during this treatment process.

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