Civil Engineering MCQAE Level Civil Engineering
In aerobic biological waste treatment, the organic matter (BOD) is oxidized to:
Environmental EngineeringAerobic Biological TreatmentMEDIUM
Choose the correct answer
A
Methane and CO2
B
CO2, H2O, and new cell mass (biomass)
C
Nitrates and sulphates only
D
Ammonia and H2S
Correct Answer
B. CO2, H2O, and new cell mass (biomass)
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Aerobic treatment: organic matter + O2 -> CO2 + H2O + biomass (new cells) + energy. Net energy is released, used for microbial growth. Aerobic processes include activated sludge, trickling filters, and aerated lagoons. Anaerobic processes produce CH4.
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