Reasons for low COD removal rate of anaerobic tank

Anaerobic tank sludge concentration is insufficient (return biochemical sludge to anaerobic tank).

Anaerobic pool into a large number of physicochemical sludge (inorganic substances accounted for the majority).

The insufficient or unbalanced nutrient ratio in the anaerobic tank.

The water temperature exceeds the adaptive range of anaerobic microorganisms (over 4O).

Influent ph greater than 10.5 or lower than 6.5.

Anaerobic tank residence time is too short to reach the anaerobic hydrolysis state (design problem).

Enter toxic substances.

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