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Waste Water Engineering

Q1: PH value of sludge during alkaline regression stage, is

A more than 7

B less than 7

C less than 6

D more than 6.

ANS:A - more than 7

During the alkaline fermentation stage of sludge treatment, the pH value typically increases significantly due to the production of alkaline compounds such as ammonia (NH3) and bicarbonates (HCO3^-) through microbial activity. Therefore, the pH value of sludge during the alkaline regression stage is generally more than 7. The correct option is: a. more than 7



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