. Bod is the


(a)           amount of oxygen present in water at 370C.

(b)          amount of oxygen altered by organisms in water.

(c)           amount of oxygen altered by microbes for decomposition of organic matter.

 (d)          amount of CO2 altered by microbes in water.

Best Answer

(c)        amount of oxygen altered by microbes for decomposition of organic matter.

Biochemical Oxygen Demand (BO(D) is the rate at which microorganisms use the oxygen available in water or wastewater while stabilizing decomposable organic matter under aerobic conditions.

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