PTA^2O工艺用于养猪废水处理及其Anammox现象分析  

Application of PTA^2O Process in Swine Wastewater Treatment and Its Anammox Phenomenon Analysis

作　　者：王建西 WANG Jian-xi(North China Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300381,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300381

出　　处：《中国给水排水》2020年第8期56-62,共7页China Water & Wastewater

摘　　要：PTA^2O工艺是在传统A^2O工艺基础上的改进工艺,它将曝气、污泥回流、污泥沉淀集约在一个构筑物内,占地小,投资省。某养猪废水处理项目规模为1 500 m^3/d,原采用AO工艺,针对其废水高COD、高氨氮的特点,改造工程采用水解酸化+PTA^2O工艺,出水执行《畜禽养殖业污染物排放标准》(GB 18596-2001)。工程运行100多天后生物池自发产生厌氧氨氧化现象,之后进行生产性厌氧氨氧化调试5个月,生物池运行功率由143 k W降为37 k W,节能74. 1%,碱液及碳源基本停止投加,处理成本(不包括人工费)由9. 49元/m^3降为1. 38元/m^3,COD去除率达80%左右,总氮去除率维持在90%水平。厌氧氨氧化运行一年多来,从未发生崩溃,一直稳定运行,出水达标,节能显著。本案例证明,PTA^2O工艺采用的曝气、沉淀、污泥回流及水力循环方式在适宜的水质条件下易于自发产生厌氧氨氧化现象,且有较强生命力。PTA^2O process is an improved process on the basis of traditional A^2O process,which integrates aeration,sludge reflux and sludge sedimentation in one structure,occupies small area and saves investment. The capacity of a swine wastewater treatment project was 1 500 m^3/d under the originally AO process. Swine wastewater has the characteristics of high COD and high-strength ammonium,so the transformation project adopts hydrolysis acidification and PTA^2O process. The effluent after transformation is required to meet the Discharge Standard of Pollutants for Livestock and Poultry Breeding( GB 18596-2001). Anammox occurred spontaneously after about 100 days’ operation of the project. Afterwards,full-scale Anammox was carried out for 5 months. The power consumption of the biological tank was reduced by 74. 1% from 143 kW to 37 k W;alkali and carbon source were basically stopped addition. The treatment cost excluding labor decreased from 9. 49 yuan/m^3 to 1. 38 yuan/m^3;the removal rate of COD was about 80%;the removal rate of total nitrogen was maintained at the level of90%. Anaerobic ammonia oxidation process operated for more than a year,with no collapse,stable operating,effluent up to standard,energy saving remarkable. This case showed that the aeration,sedimentation,sludge reflux and hydraulic circulation that PTA^2O process adopted could easily produce spontaneous anaerobic ammonium oxidation under suitable water quality conditions,and had strong sustainability.

关 键 词：PTA^2O工艺 养殖废水 厌氧氨氧化 

分 类 号：TU992[建筑科学—市政工程]