Question

The fermentation of animal dung slurry is carried by

• A. aerobic fermentation
• B. anaerobic fermentation
• C. either (a) or (b)
• D. none of these

Answer 1

The correct option is B anaerobic fermentation

Answer is B.

Microbial conversion of organic matter(eg: animal dung slurry) to methane has become attractive as a method of waste treatment and resource recovery. This process is anaerobic and is carried out by action of various groups of anaerobic bacteria. Anaerobic means absence of oxygen'.
Most of the important bacteria involved in biogas production from animal dung slurry process are anaerobes and slow growing. A greater degree of metabolic specialization is observed in these anaerobic microorganisms and most of the free energy present in the substrate is found in the terminal product methane. Since less energy is available for the growth of organism, less microbial biomass is produced and, consequently, disposal of sludge after the digestion may not be a major problem.