曝气方式对活性污泥脱氮除磷效能的影响  

Influence of Aeration on Nitrogen and Phosphorus Removal Efficiency of Activated Sludge

作　　者：施昱 胡金财 景婧 华云洁 叶亮 郑凯凯 李激[4] SHI Yu;HU Jincai;JING Jing;HUA Yunjie;YE Liang;ZHENG Kaikai;LI Ji(Wuxi Water Group Co.,Ltd.,Wuxi 214001,China;Jiangsu Zhishanhui Smart Technology Co.,Ltd.,Wuxi 214121,China;Wuxi Puhui Environmental Protection Technology Co.,Ltd.,Wuxi 214028,China;School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]无锡市水务集团有限公司,江苏无锡214001 [2]江苏至善汇智慧科技有限公司,江苏无锡214121 [3]无锡普汇环保科技有限公司,江苏无锡214028 [4]江南大学环境与土木工程学院,江苏无锡214122

出　　处：《净水技术》2023年第S02期65-69,79,共6页Water Purification Technology

基　　金：城北污水处理厂智能除磷加药控制系统研究(KY202209)。

摘　　要：随着出水标准的不断提高,大量以氧化沟为主体工艺的城镇污水处理厂面临升级改造问题。文章进行了氧化沟生化池表曝改底曝前后污染物去除效果,以及活性污泥硝化速率、反硝化潜力和释磷潜力的测试分析。结果表明,改造后优化了曝气充氧效果,活性污泥的脱氮效果得到强化,出水氨氮平均值从2.8 mg/L降低至1.2 mg/L,降低幅度为57.1%;出水总氮平均值从10.2 mg/L降低至8.4 mg/L,降低幅度为17.6%。释磷潜力由0.5 mg PO_(4)^(3-)-P/(g VSS·h)增加至3.1 mg PO_(4)^(3-)-P/(g VSS·h),显著提高了生物除磷能力,出水总磷质量浓度从0.21 mg/L降低至0.15 mg/L。出水COD_(Cr)平均质量浓度也有5.2 mg/L的下降。氧化沟表曝改底曝的方式大大提升了活性污泥的整体脱氮除磷及有机物去除能力,实现出水从不达标到稳定达标排放的转变。With the continuous improvement of effluent standards,a large number of wastewater treatment plants with oxidation ditch as the main process are facing upgrading and renovation issues.This study tested and analyzed the pollutants removal effect,nitrification rate,denitrification potential and phosphorus release potential of the activated sludge in the biochemical section before and after the aeration form transformation.The results showed that the denitrification effect of activated sludge had been improved under the condition of sufficient aeration.The average concentration of ammonia nitrogen in efluent decreased from 2.8 mg/L to 1.2 mg/L,with a decrease of 57.1%,and the average concentration of total nitrogen in effluent decreased from 10.2 mg/L to 8.4 mg/L,with a decrease of 17.6%.The phosphorus release potential increased from 0.5 mg PO-P/(g VSS·h)to 3.1 mg PO-P/(g VSS·h),which significantly improved biological phosphorus removal capacity,leading to the total phosphorus concentration in effluent decreased from 0.21 mg/L to 0.15 mg/L.The average concentration of CODc.in the efluent also decreased by 5.2 mg/L.The research indicated that the method of replacing surface aeration with bottom aeration in oxidation ditch greatly improved the overall nitrogen and phosphorus removal ability of activated sludge,and enhanced the removal effect of nitrogen and phosphorus pollutants,which ensured stable and compliant discharge of effluent.

关 键 词：曝气方式 氧化沟 硝化速率 反硝化潜力 释磷潜力 

分 类 号：X703[环境科学与工程—环境工程]