WASTEWATER By Rick Lallish

What is the desired pH level for a properly operating anaerobic digester?

A. 4.0 to 6.6

B. 6.8 to 7.2

C. 7.6 to 9.0

D. Above 10.0

Answer: B. Anaerobic digesters can operate at pH 6.0 to 8.0; the desired range is 6.8 to 7.2. If the pH...