Influence of Temperature on Biogas Componsition of Thermostatic Anaerobic Fermentation

To study the influence of temperature on biogas composition of thermostatic anaerobic fermentation with cattle manure,four parallel anaerobic digesters of 11.5 L were operated in batch mode at temperature of 19℃,30℃,37℃ and 52℃,respectively,and the real-time analysis were carried out to determine the biogas composition with Biogas Check instrument.The results shows that the highest cumulative biogas and the highest methane production are under 37℃,and the lowest cumulative biogas and the lowest methane production are under 19℃. The fermentation period for 37℃is 22 day during which the volumetric biogas production rate was 0.76 m3·m-3d-1 with TS biogas production yield of 0.31 m3·kg-1,and average content of methane was 53.59%.