The cumulative total volume of biogas generated within the
60 days retention period is 85,200 cm3. The gas chromatography
analysis of the biogas revealed CH4 to be 58%, CO2 24% and other
impurities 19%. Table 3 shows the properties of the compost
obtained from the digestate and indicates a modification in pH.
From Table 3, the carbon, nitrogen and phosphate contents of the
compost were found to be 37.91%, 2.49% and 3.49% respectively.
The C/N ratio and pH of the resulting compost are 15.9:1 and 7.2.
Curing improved pH, carbon and nitrogen contents as found in
the composted digestate (Table 3) in comparison to the uncured
digestate (Table 2). The mean microbial count per week of the
species of microorganisms found in the digester during the
anaerobic digestion, shows that the methanogens had the leas