Study on the Influence of Thermal Hydrolysis on the Gas Production Performance of Primary Sludge by High Temperature Anaerobic Digestion
At present,anaerobic digestion is the main way to treat sludge in municipal sewage treatment plants,and the traditional anaerobic digestion of sludge has low organic conversion and gas production performance.A pilot test was conducted using thermal hydrolysis combined with high temperature anaerobic digestion to investigate the influence of thermal hydrolysis process on the high temperature anaerobic digestion gas production performance of primary sludge.The test results show that the maximum particle size,average particle size and median particle size of the initial sludge after thermal hydrolysis are 0.49 times,0.55 times and 0.51 times,respectively,the content of organic matter in the sludge that can be decomposed by anaerobic microorganisms is significantly increased,and the COD dissolution rate reaches 27.1%.Compared with that before the treatment,the total gas production per unit VS of the initial sludge was increased by 21.93%,and the conversion rate of organic matter was increased by 4.93%.The thermal hydrolysis process effectively improved the gas production performance of the initial sludge during high temperature anaerobic digestion.
primary sludgethermal hydrolysishigh temperature anaerobic digestionanaerobic digestion gas production
NETL
NSTL
万方数据
维普
