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The decomposition of nitrogenous organic matter in the absence of oxygen gives __________

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The  decomposition of nitrogenous organic matter in the absence of oxygen gives __________

(a) Nitrites and water

(b) Carbon dioxide and water

(c) Nitrates and ammonia

(d) Nitrogen, ammonia and organic acids

This question was addressed to me in class test.

My doubt is from Biological Characteristics of Waste Water in portion Wastewater Characteristics of Environmental Engineering

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Correct option is (d) Nitrogen, ammonia and organic acids

To explain I would say: Nitrogenous organic matter (reduction by anaerobic bacteria) —–> N2 + NH3 + organic acids + Energy.

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