摘要
为执行严格的《四川省岷江、沱江流域水污染排放标准》(DB51/2311-2016),采用AAO-MBR脱氮除磷工艺对金堂县的4座村镇污水处理厂进行提标改造。结合水质分析,讨论了村镇污水厂存在的问题,确定了提标改造技术难点在于TN和TP的去除。以淮口厂为例,在不新增用地的情况下,将原有的氧化沟工艺改造为AAO-MBR工艺,并采用较高的污泥回流比(200%~300%)和内回流比(400%),新增碳源投加系统和PAC化学除磷系统。结果表明,AAO-MBR工艺有效提高原工艺的脱氮除磷效能。项目建成投产以来,运行状况良好,所有污水厂对TN、SS、TP、COD、NH_(3)-N和BOD_(5)去除率均在74.27%、91.01%、94.80%、88.26%、99.12%和98.26%以上,出水水质稳定达标,对保护沱江水环境具有实际意义。
To implement the strict the"Water Pollution Discharge Standard for Minjiang River and Tuojiang River in Sichuan"(DB51/2311-2016),AAO-MBR denitrification and dephosphorization process was selected to upgrade and transform the four village sewage treatment plants in Jintang County.Combined with the analysis of water quality,the problems existing in village sewage plants were discussed.The removal of total nitrogen and total phosphorus were determined to the main difficulty in upgradation and reconstruction.Take Huaikou as an example.The original oxidation ditch process is transformed into AAO-MBR process under the no increasing land principle.Meanwhile,a higher sludge reflux ratio(200%to 300%)and internal reflux ratio(400%)are adopted.In addition,a carbon source dosing system and a PAC chemical phosphorus removal system are added to AAO-MBR process.The results show that the AAO-MBR process improves the removal efficiency of nitrogen and phosphorus effectively compared with the original process.Since the completion of the project,the removal efficiency of effluent TN,SS,TP,COD,NH_(3)-N,and BOD_(5) in four sewage plants have all reached above 74.27%,91.01%,94.80%,88.26%,99.12%and 98.26%,and the effluent quality is stable and up to design standard.This project has practical significance to protect the Tuojiang River environment.
作者
祝年俊
贺阳
孙政
黄崇锐
袁绍春
蒋彬
ZHU Nianjun;HE Yang;SUN Zheng;HUANG Chongrui;YUAN Shaochun;JIANG Bin(Chengdu Tianfu Water City Urban and Rural Water Construction Co.,Ltd,Chengdu 610400,China;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610081,China;Key Laboratory of Ministry of Education for Hydraulic and Water Transport Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2022年第12期140-144,共5页
Technology of Water Treatment
关键词
AAO工艺
MBR
村镇污水处理厂
提标改造
AAO process
MBR process
rural sewage treatment
upgradation and reconstruction
