改良多级A/O对低C/N生活污水强化除磷效果研究  

Study on enhanced phosphorus removal effect of improved multi-stage A/O on low C/N domestic sewage

作　　者：王宏伟 张国珍[1,2,3] 武福平 明驹[4] 闵芮 严婉铒 程锦 WANG Hongwei;ZHANG Guozhen;WU Fuping;MING Ju;MIN Rui;YAN Wan’er;CHENG Jin(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China;Key laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,Gansu,China;Engineering Research Center for Comprehensive Utilization of Water Resource in Cold and Arid Regions of Ministry of Education,Lanzhou 730070,Gansu,China;Wuhan Metro Group Co.,Ltd.,Wuhan 430000,Hubei,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]甘肃省黄河水环境重点实验室,甘肃兰州730070 [3]寒旱地区水资源综合利用教育部工程研究中心,甘肃兰州730070 [4]武汉地铁集团有限公司,湖北武汉430000

出　　处：《化工进展》2020年第S02期379-384,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51768031);兰州交通大学青年基金(2019012);甘肃省非常规水资源化利用技术重点实验室开放课题(UWKL-1903)。

摘　　要：针对传统多级A/O工艺处理低碳氮比生活污水除磷效果差的问题,通过增设前置厌氧段改良多级A/O工艺,重点研究了除磷效果的可行性。结果表明:在温度为17℃±3℃、流量分配比为100%∶0∶0、水力停留时间为10h、污泥回流比为50%、污泥龄为14天的条件下,系统总体除磷效果较好。其中COD、TP平均去除率分别为89.81%、90.35%,出水平均浓度分别为32.65mg/L、0.49mg/L,均优于GB 18918—2002《城镇污水处理厂污染物排放标准》一级A排放标准。由于受到硝化反硝化的综合影响,对污水中含有的氮素去除效果一般,其中NH3-N、TN去除率均为50%左右,出水平均浓度为30.32mg/L、30.41mg/L,可通过外加碳源的方式增强反硝化能力,进一步提高系统脱氮效果,出水有望达到一级B标准。改良工艺在保证有机物去除效果的基础上基本实现了脱氮除磷,可为实际生活中处理低C/N生活污水提供参考。The problem is that the traditional multi-stage A/O process is inferior to the phosphorus removal effect of low-carbon nitrogen and domestic sewage,by adding a pre-anaerobic section to improve the multi-stage A/O process,the feasibility of the phosphorus removal effect was mainly studied.The results show that under the conditions of temperature 17℃±3℃,flow distribution ratio of 100%∶0∶0,hydraulic retention time of 10h,sludge return ratio of 50%,and sludge age of 14d,the system of the overall phosphorus removal effect is better.Among them,the average removal rates of COD and TP were 89.81%and 90.35%,and the average effluent concentrations were 32.65mg/L and 0.49mg/L,which were better than Grade A of GB 18918—2002"Emission Standards for Pollutants of Urban Wastewater Treatment Plants"Emission Standards.Due to the comprehensive influence of nitrification and denitrification,the removal effect of nitrogen in sewage is general.The removal rate of NH3-N and TN is about 50%,and the average concentration of effluent is 30.32mg/L and 30.41mg/L.By adding a carbon source,the denitrification capacity is enhanced to further improve the denitrification effect of the system,and the effluent is expected to reach Class B standards.The improved process basically realizes the removal of nitrogen and phosphorus on the basis of ensuring the removal effect of organic matter,which can provide a reference for the treatment of low C/N domestic sewage in actual life.

关 键 词：改良多级A/O 低碳氮比 生活污水 强化除磷 环境 

分 类 号：X703[环境科学与工程—环境工程]