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In water environment, what are : (i) Biotic Oxygen Demand and (ii) Chemical Oxygen Demand?

Asked by Indra Datta, 20 Nov '08 03:06 pm
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Biotic / biological oxygen demand: An indirect measure of the concentration of biologically degradable material present in organic wastes. It usually reflects the amount of oxygen consumed in five days by biological processes breaking down organic waste in water. Chemical oxygen demand: A measure of the oxygen required to oxidize all compounds, both organic and inorganic, in water.
Answered by swathi sudhapalli, 20 Nov '08 11:23 pm

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