西安市某污水处理厂倒置A^2/O工艺改造研究  

Transformation of Inverted A^2/O Process in a Wastewater Treatment Plant in Xi'an City

作　　者：张雨[1] 王先宝[1] 孙红芳 蔡虎林 金鹏康[1] 李晓乐 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安市污水处理有限责任公司第四污水处理厂,陕西西安710018 [3]陕西四季春清洁热源股份有限公司,陕西西安710061

出　　处：《中国给水排水》2016年第7期117-120,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07302-001);陕西省科技统筹创新工程项目(2011KTZ B03-03-03);新世纪优秀人才项目(NCET-12-1043);陕西省创新团队项目(IRT 2013KCT-13);西安市科技计划项目(CX12160)

摘　　要：针对西安市某污水厂一期工程处理能力不足且出水水质无法达到一级A标准的现状,通过对一期工艺的解析和进出水水质的分析,明确了一期倒置A2/O工艺存在缺氧区停留时间不足及污泥处置回流液对水质影响过大的问题,基于一期存在的问题并结合二期扩建工程,提出在好氧池中段增加停留时间为1 h的缺氧段、增加前置缺氧选择池及提高污泥处置效率的工艺改进方案。二期工艺改进建设完成后,出水各项指标均能稳定达到一级A标准。In view of the insufficient treatment capacity of the first-stage project of a wastewater treatment plant in Xi＇ an and that the effluent quality could not meet the first level A criteria specified in the national discharge standards, the problems of insufficient residence time in anoxic zone and the excessive impact of sludge disposal reflux liquid on water quality in the inverted A＆2/O process were defined by analyzing the influent and effluent quality in the first-stage project. Based on these problems and the second-stage project, the improvement scheme of adding an anoxic zone with residence time of 1 h in the middle of aerobic tank, adding a bio-selecting tank and improving the efficiency of sludge disposal was proposed. After the improvement, the effluent quality could meet the first level A criteria specified in the national discharge standards.

关 键 词：倒置A^2/O工艺 反硝化 释磷 硝酸盐 污泥回流 提标改造 

分 类 号：X703[环境科学与工程—环境工程]