热水解预处理强化污水污泥厌氧消化产甲烷。
Enhancement of methane production in anaerobic digestion of sewage sludge by thermal hydrolysis pretreatment.
机构信息
Department of Civil Engineering, The University of Suwon, Hwaseong, Gyeonggi 18323, Republic of Korea.
Department of Environmental Health, Korea National Open University, Seoul 03087, Republic of Korea.
出版信息
Bioresour Technol. 2018 Jul;259:207-213. doi: 10.1016/j.biortech.2018.02.123. Epub 2018 Feb 27.
This study was performed to optimize thermal hydrolysis pretreatment (THP) of sewage sludge for enhanced anaerobic digestion (AD). Using the response surface methodology (RSM), the optimal conditions were found 180 °C of reaction temperature and 76 min of reaction time. Through THP under optimal conditions, high molecular substances in sewage sludge such as soluble microbial by-products (SMPs) and extracellular polymeric substances (EPSs) were hydrolyzed into low molecular ones without the generation of refractory compounds. The microbial community analysis revealed that relative abundances of Methanomicrobia such as Methanosarcina, Methanosaeta (acetoclastic methanogens), and Methanoculleus (hydrogenotrophic methanogens) in AD with THP were higher than those in conventional AD.
本研究旨在优化污水污泥的热水解预处理（THP），以增强厌氧消化（AD）。使用响应面法（RSM），找到了最佳条件为 180°C 的反应温度和 76 分钟的反应时间。通过在最佳条件下进行 THP，污水污泥中的高分子物质，如可溶性微生物产物（SMPs）和胞外聚合物物质（EPSs），被水解成低分子物质，而没有产生难降解的化合物。微生物群落分析表明，经过 THP 的 AD 中，产甲烷菌门（如产甲烷八叠球菌属、产甲烷丝菌属）和甲烷微菌科（氢营养型产甲烷菌）等 Methanomicrobia 的相对丰度高于常规 AD。
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