The sludge removed from earlier steps in wastewater treatment can further be broken down into stable solids and methane (natural

Question

The sludge removed from earlier steps in wastewater treatment can further be broken down into stable solids and methane (natural gas) by:
a) aerobic digestion
b) disinfection
c) anaerobic digestion
d) sedimentation

Kunduz · Accepted Answer

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