餐厨垃圾两段式厌氧消化的性质研究  

Study on properties of two-stage anaerobic digestion of kitchen waste

作　　者：李春艳 吕育财[1,2,4] 龚大春 刘陈杰[1,2] 朱佳琪 李宁 LI Chun-yan;LYU Yu-cai;GONG Da-chun;LIU Chen-jie;ZHU Jia-qi;LI Ning(Hubei Engineering Research Center for Biological Jiaosu(China Three Gorges University),Yichang 443002,Hubei,China;College of Biological and Pharmaceutical Sciences,China Three Gorges University,Yichang 443002,Hubei,China;College of Water Resources and Environment,China Three Gorges University,Yichang 443002,Hubei,China;Key Laboratory of Functional Yeast,China National Lignt Industry(China Three Gorges University),Yichang 443002,Hubei,China)

机构地区：[1]湖北省生物酵素工程技术研究中心(三峡大学),湖北宜昌443002 [2]三峡大学生物与制药学院,湖北宜昌443002 [3]三峡大学水利与环境学院,湖北宜昌443002 [4]中国轻工业功能酵母重点实验室(三峡大学),湖北宜昌443002

出　　处：《湖北农业科学》2022年第5期70-75,共6页Hubei Agricultural Sciences

基　　金：湖北省技术创新专项(重大项目)(2019ABA114)。

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。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.

关 键 词：餐厨垃圾 活性污泥 水解酸化 厌氧消化 甲烷产率 

分 类 号：X705[环境科学与工程—环境工程]