Effect of Biochar Addition on the Microbial Community and Methane Production in the Rapid Degradation Process of Corn Straw

Anaerobic digestion with corn straw faces the problems of difficult degradation, long fermentation time and acid accumulation in high concentration feedstocks. In order to speed up process methane production, treated sodium hydroxide was used thermophilic (50 °C) anaerobic digestion, effects biochar addition on performance production microbial community were analyzed. The results showed that cumulative all treatment groups reached over 75% theoretical yield 7 days 4% increased by 6.75% compared control group. also decreased number biogas peaks from 2 1, had a positive effect shortening start-up period reducing fluctuation during process. abundance bacterial family Peptococcaceae throughout period, promoting hydrolysis rate straw. dominant archaeal genus Methanosarcina significantly more abundant at peak stage end added