有机碳源对短程硝化系统的影响及综合调控  

Effect of organic carbon source on the performance of partial nitrification system and its comprehensive regulation

作　　者：雷勇飞 杨昌炜 彭正华 万幸[1] 潘学军[1] 杨本芹 LEI Yongfei;YANG Changwei;PENG Zhenghua;WAN Xing;PAN Xuejun;YANG Benqin(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《环境工程学报》2021年第9期3088-3100,共13页Chinese Journal of Environmental Engineering

基　　金：云南省农业环境污染控制与生态修复工程实验室开放基金(2017HC015);云南水务创新创业基金资助项目(HJ2020AY013)。

摘　　要：为探究废水中有机碳源对短程硝化系统的影响和维持短程硝化稳定过程的运行条件,利用序批式反应器(SBR)启动短程硝化过程,同时分析有机碳源质量浓度对短程硝化过程的影响。结果表明:在运行至151 d时,反应器中NH^(+)_(4)-N去除率(ARR)与NO^(−)_(2)-N积累率(NAR)分别稳定为(91±1.36)%和(99±0.04)%;在无有机碳源的环境中,仅通过调节曝气量即可成功启动短程硝化;在有机碳源存在的环境中,反硝化作用会随着有机碳源质量浓度的提高而加剧,并会加强抑制短程硝化,通过综合调控曝气量、游离氨(FA)和无机碳源量,可恢复稳定的短程硝化过程。微生物群落分析结果表明:反硝化菌属Comamonadaceae的相对丰度由0.70%上升至51.89%,说明在高质量浓度有机碳源中更有利于反硝化菌的生长;而主要功能菌亚硝化单胞菌属Nitrosomonas的相对丰度由34.70%下降至1.35%,在运行过程中短程硝化性能出现下降趋势。通过对运行参数的综合调控,最终可稳定运行短程硝化系统。A sequencing batch reactor(SBR)was used to start the partial nitrification process.The impact of organic carbon sources in wastewater on the partial nitrification system and the operating conditions of the stable process,as well as the influence of the mass concentration of organic carbon sources on the partial nitrification process were studied.The results showed that after 151 days of operation,the NH^(+)_(4)-N removal rate(ARR)and NO^(−)_(2)-N accumulation rate(NAR)in the reactor were stable at(91±1.36)%and(99±0.04)%,respectively.In the environment without organic carbon source,partial nitrification could be successfully initiated only by adjusting the aeration rate.In the presence of organic carbon sources,denitrification increased with the increase of organic carbon source concentration,and the inhibition of partial nitrification was strengthened.Stable partial nitrification process could be restored through the comprehensive regulation of aeration rate,free ammonia(FA)and inorganic carbon source.Through the analysis of microbial community,the relative abundance of Comamonadaceae of denitrifying bacteria increased from 0.70%to 51.89%,indicating that high concentrations of organic carbon sources were conducive to the growth of denitrifying bacteria.The relative abundance of the main functional bacteria Nitrosomonas decreased from 34.70%to 1.35%,and the partial nitrification performance showed a downward trend during operation.However,through the comprehensive control of operating parameters,the partial nitrification system could maintain stable finally.

关 键 词：短程硝化 有机碳源 反硝化作用 综合调控 

分 类 号：X703.1[环境科学与工程—环境工程]