1. Sludge will dry faster if it is put onto a sand drying bed before it is completely digested.
a. true
b. false

2. The single greatest safety hazard operators are exposed to when working around anaerobic digesters is potentially explosive conditions.
a. true
b. false

3. Volatile acids should be kept low in an anaerobic digester.
a. true
b. false

4. The BOD test is a good test for checking digester operation.
a. true
b. false

5. Carbon dioxide gas is a major component of digester gas from a properly operating digester.
a. true
b. false

Answers:

1. b
2. a
3. a
4. b
5. b