Which of the following is correct regarding anaerobic digestion in the sludge digestion process?

Which of the following is correct regarding anaerobic digestion in the sludge digestion process? Correct Answer It is a low energy process

Anaerobic digestion is a low energy process that contains low amount of biomass and where both facultative and anaerobic bacteria solubilize the organic matter.

Related Questions

Statement (I): Anaerobic sludge digester, by itself, is considered to be the better method than other methods of sludge treatment: Statement (II): During anaerobic sludge digestion, CH4 is produced; also rodents and other pests are attracted when digester sludge is dried. 
Statement (I): When waste water is treated at an oxidation ditch, anaerobic sludge digester is not required. Statement (II): Oxidation ditch admits an extended aeration process whereby sludge gets mineralized.