What is the percentage removal of BOD by stabilization ponds?

What is the range of pH above which aeration is required?

To what temperature is a sludge constituting liquid biosolids heated in order to treat it?

What is the temperature at which sludge constituting biosolids are composted?

The measure of pH is the __ ion concentration.

After the treatment, the BOD demand __

H2S is highly soluble in water.

What is autotrophic biomass made up of?