不同生物预处理方式对污泥厌氧消化过程性能的影响  

Effect of Different Biopretreatments on Anaerobic Digestion Process Performance of Sludge

作　　者：李雪[1] 林聪[1] 沙军冬 李想[1,3] 王飞 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]北京盈和瑞环保工程有限公司,北京100043 [3]农业部农业生态与资源保护总站,北京100125

出　　处：《农业机械学报》2015年第8期186-191,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：公益性行业(农业)科研专项资助项目(201303101-03)

摘　　要：利用微生物处理技术对经聚丙烯酰胺脱水后的污泥进行不同方式微生物预处理,研究进料总固体(TS)质量分数为3%、发酵温度为35℃时厌氧消化过程中累积产气量与产甲烷含量、p H值、氨氮和化学需氧量(TCOD)等参数的变化趋势,探索真菌宛氏拟青霉不同预处理方式对脱水污泥厌氧消化过程特性的影响。试验结果表明:微生物预处理脱水污泥厌氧消化技术具有较好的可行性。直接添加宛氏拟青霉和添加宛氏拟青霉预处理2 d的污泥进行厌氧消化反应能够有效提高产气量和产甲烷量,加快水解速率,促进污泥中有机物的有效降解,使产甲烷过程顺利进行。直接添加宛氏拟青霉处理的产甲烷效果最优,其净累积产气量和产甲烷量较纯污泥分别提高85.79%和42.76%,且1 kg污泥可产甲烷12.69 L,较纯污泥提高42.74%。With the rapid development of the sewage treatment, dewatered sludge, as an inevitable byproduct, is increasing its amount. Anaerobic digestion performance of dewatered sludge flocculated by polyacrylamide under different biopretreatments conditions were studied. The feeding concentration was 3% of total solid, and the digestion temperature was 35℃. The cumulative biogas yield, methane content, pH value, ammonia nitrogen content and total chemical oxygen demand （TCOD） were analyzed to explore the effect of fungus--Paecilomyces variotii on anaerobic digestion process. The result showed that biopretreatment of dewatered sludge prior to anaerobic digestion was an alternative method. Direct addition and 2 d biopretreatments can both enhance cumulative biogas yield and methane content with faster hydrolysis rate and better organic matter degradation rate. Compared with the pure sludge treatment, direct addition of Paecilomyces variotii was optimal, and its cumulative biogas production and methane production were increased by 85.79% and 42. 76%, respectively. While 1 kg dewatered sludge can produce 12. 69 L methane with an increase of 42.74% of sludge without pretreatment. The result would provide theoretical basis for solving the problem of dewatered sludge resourceful treatment.

关 键 词：微生物预处理 脱水污泥 厌氧消化 过程性能 

分 类 号：X705[环境科学与工程—环境工程] TQ920.6[轻工技术与工程—发酵工程]