多级多段AO工艺在市政污水处理中的应用  

Application of Multistage and Multistage AO Process in Municipal Wastewater Treatment

作　　者：王婷 朱晓禹 董斌 王政委 孙永军 肖雪峰 WANG Ting;ZHU Xiaoyu;DONG Bin;WANG Zhengwei;SUN Yongjun;XIAO Xuefeng(Jiangsu Honest Environmental Protection Technology Co.,Ltd.210046;School of Urban Construction,Nanjing Tech University,211816:Nanjing,China)

机构地区：[1]江苏奥尼斯环保科技有限公司,210046 [2]南京工业大学城市建设学院,江苏南京211816

出　　处：《水处理技术》2022年第4期143-144,153,共3页Technology of Water Treatment

基　　金：国家重点研发计划资助(2017YFB0602500);江苏省自然科学基金项目(BK20201362)。

摘　　要：山西某市政污水处理厂提标改造规模 4×10^(4)m^(3)/d。污水处理厂原采用厌氧+氧化沟生化处理工艺,出水执行一级 A 标准(GB 18918-2002),提标改造要求出水指标 COD、氨氮、总磷执行地表水环境质量标准(GB 3838-2002)Ⅴ类标准。针对生化系统中脱氮、除磷效果不稳定等特点,改造工程生化系统采用厌氧+多级 AO 工艺,将原有氧化沟改造成多级 AO 池,配置底部曝气系统及推流系统,且出水增设混凝加药等措施,工艺升级改造后稳定运行。结果表明,通过一系列提标改造,出水水质明显优于设计标准。The upgrading and reconstruction scale of a municipal sewage treatment plant in Shanxi Province is 4×10^(4)m^(3)/d. The wastewater treatment plant used to adopt Anaerobic + oxidation ditch biochemical treatment process, and the effluent was in accordance with grade a standard (GB 18918-2002). The effluent indexes of COD, ammonia nitrogen and total phosphorus required in the upgrading and reconstruction were in accordance with class V standard of surface water environmental quality standard (GB 3838-2002). In view of the unstable effect of nitrogen and phosphorus removal in the biochemical system, the biochemical system of the reconstruction project adopts Anaerobic + multi-stage AO process, transforms the original oxidation ditch into multi-stage AO tank, configures the bottom aeration system and plug flow system, and adds coagulant dosing in the effluent. After the process upgrading and reconstruction, it runs stably. The results show that the effluent quality is obviously better than the design standard.

关 键 词：提标改造 多级A/O 混凝 

分 类 号：X703.1[环境科学与工程—环境工程]