biological oxygen demand
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We can determine the amount of organic pollutants present in water by determining the amount of oxygen used up by microbes in unit volume of water is given time .This type of measurement is called Biochemical Oxygen Demand -BOD
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BOD - Biochemical Oxygen Demand. The BOD (biological or biochemical oxygen demand) value indicates the amount of oxygen which is needed for the biological degradation of organic substances in water in mg O2/ l. Generally, the biological oxygen demand serves as a sum parameter for the assessment of pollution of sewage.
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