1.

Which is correct sequence for purification process of STPs ?

A. Primary Sludge EffluentFlocks Active Sludge Biogas
B. Flocks Primary Sludge Effluent Active Sludge Biogas
C. Primary Sludge Effluent Active Sludge Flocks Biogas
D. EffluentFlocks Primary Sludge Active Sludge Biogas
Answer» B.


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