【摘要】 为实现餐厨垃圾资源化利用，采用水解酸化-厌氧消化两段式发酵，将餐厨垃圾水解酸化5 d后，利用活性污泥对酸化液进行16 d的厌氧消化，考察以餐厨垃圾为原料的生物甲烷的生产效率。结果表明，经水解酸化后，产酸现象明显，pH下降至4.69，乙酸浓度达3.11 mg/mL，酸化液的sCOD浓度达174.34 g/L。厌氧消化段产气效果明显，2 d内产气量达最高峰，pH由7.89下降至7.54，但未产生明显抑制。第6天产气量出现第二个峰值，而后随着消化体系有机质含量变少产气量逐渐降低。产气期间消化体系一直维持碱性状态，甲烷产率平均值为315.47 mL/g VS，累积沼气中平均甲烷含量为53.79%，甲烷最高含量达67.49%。可见两段式厌氧消化能够有效进行餐厨垃圾处理。更多还原

【Abstract】 In order to realize the resource utilization of kitchen waste,two-stage fermentation of hydrolysis acidification-anaerobic digestion was adopted. After the kitchen waste was hydrolyzed and acidified for 5 days,the acidified solution was digested by activated sludge for 16 days to test the production efficiency of biomethane using kitchen waste as raw material. The results showed that after hydrolytic acidification,the acid production was obvious,the pH decreased to 4.69,the concentration of acetic acid reached 3.11 mg/mL,and the sCOD of digestive juice increased obviously to 174.34 g/L. The gas production effect in the anaerobic digestion section was obvious,the gas production reached the highest peak within 2 days,and the pH dropped from 7.89 to 7.54,but no significant inhibition was produced. The second peak of gas production appeared on the 6th day,and gradually decreased with the decrease of organic matter content in the system. During the gas production period,the digestion system had always maintained an alkaline state. The average methane yield during the gas production period was 315.47 mL/g VS,the average methane content in cumulative biogas was 53.79%,and the highest content of methane was 67.49%. It can be seen that that two-stage anaerobic digestion can effectively treat kitchen waste.更多还原