Home » water pollution mcqs » How is the amount of biodegradable organic matter in sewage water estimated? Water Pollution MCQs How is the amount of biodegradable organic matter in sewage water estimated? September 22, 2022 28 Views Q. How is the amount of biodegradable organic matter in sewage water estimated? Chemical Oxygen DemandPhysical Oxygen DemandBiological Oxygen DemandMathematical Oxygen Demand Answer: Biological Oxygen Demand