基于SASMBR的城镇污水PN/ANAMMOX研究  

Study of Partial Nitritation and Annmmox Process Treating Mainstream Municipal Wastewater with SASMBR

作　　者：李建启 余道道 吕育锋 刘思彤 LI Jianqi;YU Daodao;LüYufeng;LIU Sitong(Department of Environment and Energy,Peking University Shenzhen Graduate School,Shenzhen 518055;Beijing Engineering Research Center of Advanced Wastewater Treatment,Department of Environmental Science&Engineering,Peking University,Beijing 100871)

机构地区：[1]北京大学深圳研究生院环境与能源学院,深圳518055 [2]北京大学环境科学与工程学院,北京市新型污水深度处理工程技术研究中心,北京100871

出　　处：《北京大学学报（自然科学版）》2020年第2期331-340,共10页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：深圳市科技计划项目(JSGG20160429162015597)资助。

摘　　要：基于目前短程硝化–厌氧氨氧化(partial nitritation and anammox, PN/A)工艺处理城镇污水中反应器运行不稳定和氮去除负荷低的问题,本文设计一种新型复合生物反应器:序批式–折流板–分置膜生物反应器(sequencingbatch-baffled-separatemembranebioreactor,SASMBR)。将该反应器应用于PN/A工艺处理城镇污水,探究反应器的性能,并对SASMBR运行PN/A工艺的运行成本进行分析。结果表明,采用SASMBR反应器运行PN/A工艺处理城镇污水,能够实现高效稳定的脱氮效果,TN去除率达到80%~85%,氮素去除负荷(nitrogenremovalrate,NRR)达到0.20~0.22kgN/(m-3·d-1),出水TN浓度维持在8 mg/L以下。16SrRNA基因测序分析发现,短程硝化SASMBR反应器内设置的折流板能够富集氨氧化细菌(ammoniaoxidationbacteria,AOB),确保短程硝化SASMBR反应器的良好性能;厌氧氨氧化SASMBR内固定在折流板两侧的无纺布可以有效地持留厌氧氨氧化菌(ammoniumoxidizingbacteria,AnAOB),同时,厌氧氨氧化SASMBR内丰度升高的AOB可以为AnAOB提供生长的厌氧环境和NO2--N基质,使厌氧氨氧化SASMBR反应器能够快速启动和高效稳定运行。SASMBR的运行成本为0.037元/m3,比传统城镇污水处理厂的运行成本大幅度降低。Based on the reactor unstable and low nitrogen removal rate when Partial Nitritation and Anammox(PN/A) process treat municipal wastewater, a new composite bioreactor named sequencing batch-baffled-separate membrane bioreactor(SASMBR) was designed and manufactured. This reactor was applied to the treating of municipal wastewater using PN/A process to explore the performance and analyze the operating costs of the reactor. The results showed that highly efficient and stable denitrification processes had been achieved using PN/A process in this reactor, with TN removal rate up to 80%–85%, nitrogen removal rate(NRR) up to 0.20–0.22 kgN/(m3·d) and the effluent TN concentration was below 8 mg/L. 16 SrRNA gene sequencing analysis found that the baffles set inside the bioreactor could enrich ammonia oxidation bacteria(AOB), which ensuring a good treating performance of the reactor. Non-woven fabrics in the SASMBR could effectively retain anaerobic ammonium oxidizing bacteria(AnAOB), and the increasing abundance of AOB in the SASMBR could provide anaerobic environment and NO2--N substrate for the growth of AnAOB. As such, the combination inevitably accelerated the quick startup of the reactor and maintained its highly efficient and stable running. The operating costs was 0.307 yuan/m3 which was significantly lower than the traditional municipal wastewater treatment plants.

关 键 词：序批式–折流板–分置膜生物反应器 短程硝化–厌氧氨氧化 城镇污水 群落结构 

分 类 号：X703[环境科学与工程—环境工程]