压力接触氧化塔处理吡虫啉废水脱氮研究  

Study on denitrification of imidacloprid wastewater by using pressurized bio-contact oxidation process

作　　者：巩有奎[1] 李国新[2] 任丽芳[1] 

机构地区：[1]石家庄铁路职业技术学院建筑系,河北石家庄050041 [2]中国科学院城市环境研究所,福建厦门361003

出　　处：《化学工程》2009年第5期66-70,共5页Chemical Engineering(China)

基　　金：2006年河北省教育厅自然科学指导基金资助项目(Z2006441)

摘　　要：采用压力式接触氧化塔处理吡虫啉废水,并对其脱氮性能进行了试验研究。详细考察了溶解氧、容积负荷、废水含盐质量分数对氧化塔脱氮性能的影响,并对其脱氮机理进行了探讨。结果表明:当进水容积负荷(以COD计)<18.26 kg/(m3.d),NH3—N质量浓度为110 mg/L,总氮(TN)质量浓度为200 mg/L时,控制系统溶解氧的质量浓度为5.8 mg/L,压力为0.3 MPa,其COD去除率超过70%,NH3—N和TN去除率分别可达85%和80%;含盐质量分数的增加会抑制硝化菌的增殖;加压接触氧化塔在内部能够形成厌氧微环境,实现同步硝化反硝化。Pressurized bio-contact oxidation process removal characteristics were experimentally studied. was used for treating imidacloprid wastewater, and nitrogen The mechanism of simultaneous nitrification and denitrification （SND） was proposed. The effects of dissolved oxygen, organic loading rate and salt mass fraction on SND were investigated. The results demonstrate that the average NH3-N and total nitrogen can reach 85% and 80% COD） is less than 18.26 kg/（m^3 · d） are 110 mg/L, 5. 8 mg/L, 200 mg/L proliferation of nitrifying bacteria. The removal efficiency of COD is more than 70%, and that of respectively when the influent of organic loading rate （as the mass concentrations of NH3-N, dissolved oxygen and total nitrogen , and pressure 0.3 MPa. Increasing salt mass fraction can inhibit the pressurized bio-contact oxidation process can build an anaerobic microenvironment and result in SND process.

关 键 词：吡虫啉废水 加压接触氧化 脱氮 

分 类 号：X703[环境科学与工程—环境工程]