The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
A. Imhoff tanks
B. Trickling filters
C. Sludge sedimentation tanks
D. None of these
Answer: Option B
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Trickling filter, oxidation ponds , RBCs are based on aerobic process where as
Septic tanks ,imhoff tanks sludge digestion tanks and anaerobic lagoons are based on anaerobic process.
Septic tank
Imhoff tank
Trilling filter is not correct Option
i think imhoff tank is the correct answer.