基质配比及硫酸盐对AnMBR产甲烷性能的影响.PDF

中国环境科学 2017,37(3) ：998~1002 China Environmental Science 基质配比及硫酸盐对 AnMBR 产甲烷性能的影响 * 苗 妍,王志伟 ,梅晓洁,吴志超 ( 同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上 200092) 摘要：针对厌氧膜生物反应器污泥,研究了不同基质及硫酸盐对厌氧污泥产甲烷活性(SMA)及产甲烷潜能(BMP)的影响,阐述了硫酸盐还原 及产甲烷过程的作用机制.结果表明:乙酸/丙酸比值为 60%时, 乙酸与丙酸的协同作用最佳,其厌氧污泥 SMA 最快;乙酸/丙酸比值低于 40%时,丙酸转化为乙酸的速率成为甲烷生成的限制因素,其厌氧污泥 SMA 减缓;乙酸/丙酸比值高于 60%时,SMA 受到乙酸的抑制.在硫 酸盐存在条件下,当 COD/SO42--S20 时,SMA 和 BMP 均受到抑制,当 COD/SO42--S10 时,乙酸代谢受到抑制.从硫代谢情况来看,当 COD/ 2- - 2- 2- SO -S25 时,80% 以上的硫酸盐转化为稳定价态的硫(H S,HS ,S ),硫化氢对产甲烷菌产生抑制作用;当 COD/SO -S25 时,仅有 14%的硫 4 2 4 酸盐转化为稳定价态的硫,硫酸盐还原菌因底物不足而活性受到抑制. 关键词：厌氧膜生物反应器；乙酸/丙酸；硫酸盐；产甲烷活性；污水处理 中图分类号：X703.5 文献标识码：A 文章编号：1000-6923(2017)03-0998-05 * Effects of substrate ratios and sulfates on methanogenesis in an AnMBR. MIAO Yan, WANG Zhi-wei , MEI Xiao-jie, WU Zhi-chao (State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China). China Environmental Science, 2017,37(3)：998~1002 Abstract ：In this study, effects of substrate ratios and COD/SO4--S ratios on specific methanogenic activities (SMAs) and biochemical methane potentials (BMPs) in the anaerobic membrane bioreactor (AnMBR) were investigated, and the mechanisms of sulfate reduction and methanogenesis were elaborated. The results show that when the maximum SMA was obtained when the substrate ratio of acetic acid and propionic acid was 60%. When the ratio of