CRI处理氧化沟出水的效果及菌群分析  

Performance and Bacterial Communities of Constructed Rapid Infiltration(CRI)Treating Oxidation Ditch Effluent

作　　者：高明刚 童山原 钟振兴[1] 余屿锋 陆谢娟[1] GAO Ming-gang;TONG Shan-yuan;ZHONG Zhen-xing;YU Yu-feng;LU Xie-juan(School of Environmental Science&Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《中国给水排水》2020年第5期91-97,共7页China Water & Wastewater

基　　金：国家重点研发计划项目(2016YFC0400704)。

摘　　要：采用改进型人工快速渗滤系统(CRI)对氧化沟出水进行深度处理,对比分析添加/不添加玉米芯作为固体碳源的CRI系统对COD、氨氮、TN、TP的去除效果和机制,并对饱水段和非饱水段的微生物菌群进行Illumina高通量测序分析。结果表明,CRI对COD、NH4+-N、TN和TP的去除率分别达到60%~73. 3%、62. 5%~100%、57. 1%~89. 3%和85. 9%~99. 4%。CRI去除TP的主要途径是化学沉淀、渗滤介质吸附和微生物代谢等,其中海绵铁的高效化学除磷是主要作用。高通量测序结果表明,Proteobacteria、Bacteroidetes、Firmicutes和Acidobacteria是CRI内主要的门级菌群;但在属水平上,饱水层和非饱水层的厌氧菌、兼性菌、好氧菌、聚磷菌、硝化菌和反硝化菌等存在明显差异,这可能与溶解氧浓度和外加碳源有关。A modified constructed rapid infiltration(CRI)was applied for advanced treatment of oxidation ditch effluent.The removal efficiency and mechanisms of COD,NH+4-N,TN and TP by the CRI with or without corn cob as an additional solid carbon source were investigated.High-throughput sequencing technology was applied to analyze the microbial community compositions of the saturated and non-saturated layers in the CRI.The removal rates of COD,NH+4-N,TN and TP reached 60%-73.3%,62.5%-100%,57.1%-89.3%and 85.9%-99.4%,respectively.The removal mechanism of TP mainly included chemical precipitation,media adsorption and microbial degradation,and the sponge iron played a major role in TP removal.Meanwhile,high-throughput sequencing showed that Proteobacteria,Bacteroidetes,Firmicutes and Acidobacteria were the dominant phyla.However,obvious differences between the saturated and the non-saturated layers were found in the composition and relative abundance of anaerobes,facultative bacteria,aerobes,PAOs,nitrifiers and denitrifiers at the genus level,which might be related to the DO concentration and the additional carbon source.

关 键 词：人工快速渗滤系统 氧化沟出水 深度处理 TP去除机理 功能菌群 

分 类 号：TU992[建筑科学—市政工程]