免曝气混合填料反应器处理生活污水的性能  

Performance of passive aerated hybrid carrier bioreactor for treatment of domestic sewage

作　　者：陈申良 郭其艺 成亮 黎启明 庄琛 张超群 杨阳[2] CHEN Shenliang;GUO Qiyi;CHENG Liang;LI Qiming;ZHUANG Chen;ZHANG Chaoqun;YANG Yang(School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,P.R.China;School of Civil Engineering,Chongqing University,Chongqing 400045,P.R.China)

机构地区：[1]江苏大学环境与安全工程学院,江苏镇江212013 [2]重庆大学土木工程学院,重庆400045

出　　处：《土木与环境工程学报（中英文）》2023年第6期198-205,共8页Journal of Civil and Environmental Engineering

基　　金：江苏大学人才启动基金(4111370003)。

摘　　要：采用沸石-塑料混合填料为载体构建固定床生物膜反应器,周期性进水(厌氧)-排水(好氧)富集培养聚糖菌(GAOs),结合沸石颗粒吸附作用实现厌氧条件下COD和氨氮的去除。在进水COD和氨氮浓度分别为(508±19)mg/L和(40±3)mg/L、HRT为12 h(厌氧6 h、好氧6 h)的运行条件下,单级反应器COD、氨氮和总氮去除率分别为89.2%、57.5%、57.5%。双级反应器条件下,COD、氨氮和总氮的平均去除率分别为93.1%、84.9%、70.8%。缩短50%HRT(厌氧/缺氧3 h+好氧3 h)后,双级反应器总氮去除率提升到81.7%。16S rRNA高通量测序结果显示,聚糖菌Candidatus Competibacter的相对丰度在塑料填料表面上升了30.43倍(0.46%→14%),而在沸石颗粒表面上升了14.35倍(0.46%→6.60%),表明塑料填料表面更有利于聚糖菌的富集。In this study,a fixed-bed biofilm reactor using hybrid zeolite and plastic bio-carriers was constructed,in which successful enrichment of glycogen accumulating organisms(GAOs)under oscillating filling(anaerobic)-draining(aerobic)conditions was achieved.Associated with zeolite chemical adsorption,anaerobic removal of COD by GAOs and ammonia by zeolite was achieved.The hybrid carrier bioreactor was fed with synthetic wastewater with COD and ammonia concentration of(508±19)mg/L and(40±3)mg/L,respectively,and operated under periodical cycles of anaerobic(6 h)and aerobic(6 h).The removal rates of COD,ammonia nitrogen,and total nitrogen(TN)by single-stage treatment were 89.2%,57.5%,and 57.5%,respectively.The removal rates of COD,ammonia nitrogen,and TN by the two-stage reactors were 93.1%,84.9%,and 70.8%,respectively.By reducing the HRT by 50%(anaerobic/anoxic 3 h+aerobic 3 h),the TN removal rate in the two-stage reactors was increased to 81.7%.The results of 16S rRNA high-throughput sequencing showed that the relative abundance of Candidatus Competibacter(GAOs)increased by 30.43 times(0.46%→14%)on the surface of the plastic carrier,while it only increased by 14.35 times(0.46%→6.60%)for the zeolite carrier,indicating that the surface of the plastic carrier is more favorable for the enrichment of Candidatus Competibacter.

关 键 词：混合填料反应器 沸石 聚糖菌 同步硝化反硝化 污水处理 

分 类 号：X703.1[环境科学与工程—环境工程]