摘要
某污水处理厂原有三期工程存在的主要问题包括频繁出现超负荷运行,导致污水处理系统不稳定;一体化MBR工艺成本高,运行和管理要求严格;碳源不足、氮磷偏高,影响生化处理效率和出水达标。四期工程建设总结了前三期工程的运行经验,在生物处理段采用优化MSBR工艺,以多点进水、合理分配碳源来强化脱氮除磷;池型组合上增加功能分区,形成多级A/O以利于脱氮;深度处理段采用滤布滤池+超滤工艺来保证出水水质。四期项目"MSBR+滤布滤池+超滤"组合工艺占地小、设备少、管理与维修方便,出水水质达到了《城镇污水处理厂污染物排放标准》(GB 18918-2002)中的一级A标准,且COD<30 mg/L,满足设计要求。
There are some problems existing in a three-phase project of a WWTP including frequent influent overload leading to unstable operation, and the main drawbacks of the integrated MBR system were high cost and strict management requirement. In addition, shortage of carbon sources and high concentration of nitrogen and phosphorus had a severe impact on processing performance and effluent quality. Based on the operation experience of the three-phase project, an optimized MSBR technology was adopted in the fourth-phase expansion project, which enhanced the removal of nitrogen and phosphorus by the way of multi-point-water-inflow and reasonable distribution of carbon sources. The biological reaction tanks were divided into different functional partitions(multistage A/O) to enhance nitrogen removal, and cloth media filter and UF were used in advanced treatment stage to assure effluent quality. The combined process of MSBR, cloth media filter and UF in the fourth-phase expansion project had many advantages such as less space occupation, less equipment and convenience of management and maintenance. The effluent quality of the plant could meet the first level A criteria in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002) and the COD concentration of effluent was lower than 30 mg/L, which satisfied the design requirements.
作者
华佳
柏双友
张茂刚
张军
王涛
HUA Jia;BAI Shuang-you;ZHANG Mao-gang;ZHANG Jun;WANG Tao(Wuxi Research Center for Environmental Science and Engineering,Wuxi 214153,China;College of Architectural and Environmental Engineering,Wuxi City College of Vocational Technology,Wuxi214153,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第24期46-51,共6页
China Water & Wastewater
基金
中国博士后科学基金资助项目(2014M561688)
无锡城市职业技术学院科研创新团队项目(KYCXTD201801)
