脱水污泥高温两相与单相厌氧消化工艺比较研究  

Comparison of Performance between Thermophilic Two-phase and Single-phase Anaerobic Digestion of Dewatered Sludge

作　　者：戴晓虎[1] 叶宁[1] 董滨[1] 

机构地区：[1]同济大学环境科学与工程学院,城市污染控制国家工程研究中心,上海200092

出　　处：《科学技术与工程》2014年第33期132-138,共7页Science Technology and Engineering

基　　金：国家高技术研究发展计划(863计划)(2012AA063502);国家水体污染控制与治理科技重大专项(2011ZX07316-004)资助

摘　　要：采用课题组自主研发的自动控温间歇搅拌高含固厌氧消化反应器,针对合肥市十五里河污水处理厂的脱水污泥(稀释至含固率10%)进行了超高温(70℃)酸化-高温(55℃)甲烷化和高温(55℃)酸化-高温(55℃)甲烷化两相与高温(55℃)单相厌氧消化系统性能的比较研究。结果表明,在污泥停留时间为两相产酸相4 d、产甲烷相16 d,单相20 d的条件下,超高温-高温和高温-高温两相的VS降解率分别为40.5%和40.2%,高温单相则只有34.9%。在总停留时间相等的条件下,两相消厌氧化系统的VS降解率、甲烷产率均比高温单相厌氧消化系统高,而出泥VFA含量小于高温单相厌氧消化系统。总体来说,两相厌氧消化系统运行更为稳定,效果更好,并且有较高的H2可供利用为清洁能源,但较高的H2S含量则须控制。Performance of thermophilic two-phase and single-phase anaerobic digestion treating dewatered sludge（ diluted to 10% total solid content with distilled water） was experimentally studied and reported. The experimental results showed that volatile solid degradation rates of ultra-high,high-high temperature two-phase and thermophilic single-phase anaerobic digestion are 40. 5%,40. 2% and 34. 9%,respectively,while the sludge retention time of acidification phase is 4 d,methanation phase is 16 d,single-phase is 20 d. The degrading efficiency of volatile solid and the methane yield of the two-phase anaerobic digestion are better than that of the single-phase anaerobic digestion in the same total sludge retention time. While the volatile fatty acids content is less. Overall,the two-phase anaerobic digestion system is more stable and more effective than single-phase anaerobic digestion,and the higher H2 is available for use as clean energy,but the control of high content of H2 S is required.

关 键 词：脱水污泥 高温两相厌氧消化 高温单相厌氧消化 

分 类 号：X705[环境科学与工程—环境工程]