Diurnal Temperature Cycle(°C) HRT(d) Gas Composition
CH4 (%) CO2 (%) Others** (%)
20-40 25 69.0±1.7 25.8±1.5 5.2
20 67.6±1.3 28.6±2.3 3.8
15 62.6±1.0 37.3±1.0 0.1
10 64.9±1.0 34.9±1.0 0.2
15-25 25 71.8±2.1 25.3±1.0 3.0
20 69.6±1.8 27.3±1.0 3.1
15 47.8±0.5 44.0±1.2 8.2
10 44.6±0.5 43.6±1.8 11.8
*Each mean represents the average of 12 samples **Nitrogen, hydrogen sulphide, carbon monoxide, etc
Table 5: Biogas composition*.