无机-有机基质配置对反硝化生物滤池脱氮除磷效能的影响机制  

The influence mechanism of nitrogen and phosphorus removal efficiency in a denitrification biofilter with inorganic and organic matter substrate

作　　者：李亚楠[1] 张皓 王宇晖[1] 宋新山[1] 许中硕 LI Yanan;ZHANG Hao;WANG Yuhui;SONG Xinshan;XU Zhongshuo(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2023年第2期150-158,共9页Journal of Donghua University(Natural Science)

基　　金：资源型城市雨污协同高效利用关键技术集成与示范项目(2019YFC0408603);上海市“扬帆计划”项目(20YF1400200);上海市青年科技启明星项目(19QC1401100);中央高校基本科研业务费专项资金项目(21D111324)。

摘　　要：以火山岩-聚羟基丁酸戊酸酯(PHBV)、黄铁矿-PHBV为基质分别构建反硝化生物滤池R_(1)和R_(2)系统,考察系统间脱氮除磷的效果差异,并探究微生物群落结构特征以揭示其影响机制。结果表明,R1系统具备更好的氮负荷抗冲击能力,而R2系统的PO_(4)^(3-)—P去除率远高于R1系统,这主要是由火山岩和黄铁矿的物理形貌和化学组成差异所导致的。高通量测序结果表明,尽管R_(1)系统具有更好的氮负荷抗冲击能力,但R_(1)系统的反硝化细菌的相对丰富度低于R_(2)系统,说明黄铁矿更有利于系统反硝化菌属的优势形成。研究结果可为生物滤池中基质优化配置提供新思路,为开发高效同步脱氮除磷的生物滤池系统提供新策略。The denitrification biofilter systems R1 and R_(2)were constructed using volcanic rockpolyhydroxybutyrate(PHBV)and pyrite-PHBV as substrates to investigate the differences in nitrogen and phosphorus removal between the systems,and to investigate the structural characteristics of the microbial community to reveal the influence mechanism.The results show that the R_(1)system has better shock resistance to nitrogen loading,while the R_(2)system has a much higher PO_(4)^(3-)—P removal rate than the R1 system,which is mainly due to the difference in physical morphology and chemical composition of volcanic rocks and pyrite.The high-throughput sequencing results show that the relative abundance of denitrifying bacteria in the R1 system is lower than that in the R_(2)system,despite the better shock resistance of the R_(1)system to nitrogen loading,suggesting that pyrite is more conducive to the formation of a dominant genus of denitrifying bacteria in the system.The results of the study may provide new ideas for the optimal configuration of substrates in biofilters and new strategies for the development of biofilter systems for efficient simultaneous denitrification and phosphorus removal.

关 键 词：脱氮除磷 反硝化生物滤池 基质 微生物群落结构 

分 类 号：X703.1[环境科学与工程—环境工程]