电流强度对三维生物膜电极反应器处理含氮污水性能研究
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摘要
考察了三维生物膜电极反应器(three-dimensional biofilm electrode reactor,3D-BER)在阳极区和阴极区分别接种硝化菌和氢自养反硝化菌后,电流强度的变化对处理含氮污水性能的影响.在水力停留时间为12h,进水氨氮浓度为30mg/L,DO调节在6mg/L,pH为7.0,将电流强度分别调至20,40,60,80mA,研究反应器的脱氮效果.结果表明:随电流强度的增大,NH4+-N的去除率呈现先升高后降低的趋势.当电流强度为40mA时,氨氮的去除率达到最高,为79.24%;电流强度升高至80 mA时,反应器对NH4+-N的去除率降为58.61%.
This study investigated the effect of changes in current intensity on the performance of nitrogen-containing wastewater after inoculation of nitrifying bacteria and hydrogen autotrophic denitrifying bacteria in the anode and cathode regions of a three-dimensional biofilm electrode reactor.When the hydraulic retention time is 12 h,the influent ammonia nitrogen concentration is 30 mg/L,the DO is adjusted at 6 mg/L,and the pH is 7.0,the current intensity is adjusted to 20,40,60,80 mA,respectively.The experimental results show that with the increase of current intensity,the removal rate of ammonia nitrogen first increases and then decreases.When the current intensity is 40 mA,the removal effect of ammonia nitrogen is the best,which can reach 79.24%.When the current intensity is 80 mA,the removal rate of ammonia nitrogen in the reactor is reduced to 58.61%.
This study investigated the effect of changes in current intensity on the performance of nitrogen-containing wastewater after inoculation of nitrifying bacteria and hydrogen autotrophic denitrifying bacteria in the anode and cathode regions of a three-dimensional biofilm electrode reactor.When the hydraulic retention time is 12 h,the influent ammonia nitrogen concentration is 30 mg/L,the DO is adjusted at 6 mg/L,and the pH is 7.0,the current intensity is adjusted to 20,40,60,80 mA,respectively.The experimental results show that with the increase of current intensity,the removal rate of ammonia nitrogen first increases and then decreases.When the current intensity is 40 mA,the removal effect of ammonia nitrogen is the best,which can reach 79.24%.When the current intensity is 80 mA,the removal rate of ammonia nitrogen in the reactor is reduced to 58.61%.
引文
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[2]郑兴灿，李亚新．污水除磷脱氮技术[M]．北京：中国建筑工业出版社，1998:9-10.ZHENG Xing-can,LI Ya-xin.The technology of phosphorus and nitrogen removal from wastewater[M].Beijing:China Architecture&Building Press,1998:9-10.(in Chinese)
[3] ZHOU M H,FU W J,GU H Y,et al.Nitrate removal from groundwater by a novel three-dimensional electrode biofilm reactor[J].Electrochimica Acta,2007,52(3):6052-6058.
[4]陈建平．三维电极生物膜反应器脱除低C/N值废水中硝酸盐氮和COD[D]．武汉：华中科技大学，2006.CHEN Jian-ping.Three-dimensional electrode-biofilm reactor for removal of nitrate nitrogen and COD from low C/N ratio wastewater[D].Wuhan:Huazhong University of Science and Technology,2006.(in Chinese)
[5]马生军．新型三维电极生物膜工艺强化脱氮除磷特性[J]．水处理技术，2016,42(4):39-41.MA Sheng-jun.New type of three dimensional electrode biofilm process strengthen denitrification and phosphorus removal characteristics[J].Water Treatment Technology,2016,42(4):39-41.(in Chinese)
[6]郝瑞霞，任晓克，徐忠强．3BER反应器极板面积和布置形式对脱氮效果的影响[J]．北京工业大学学报，2016,42(3):447-453.HAO Rui-xia,REN Xiao-ke,XU Zhong-qiang.Influence of electrode plate area and arrangement of 3BER reactor on the nitrogen removal[J].Journal of Beijing University of Technology,2016,42(3):447-453.(in Chinese)
[7]国家环境保护总局．水和废水监测分析方法[M].4版．北京：中国环境科学出版社，2002.State Environmental Protection Administration.Monitoring and analysis methods of wastewater[M].4th ed.Beijing:China Environmental Press,2002.(in Chinese)
[8]陈泽新．三维生物膜电极反应器处理硝酸氮微污染地下水研究[D]．青岛：青岛理工大学，2018.CHEN Ze-xin.Study on three demension biofilm electrode reactor for removal of nitrate nitrogen from slightly polluted groundwater[D].Qingdao:Qingdao University of Technology,2018.(in Chinese)
[9]李俊成．三维电极生物膜反应器深度处理含氮污水的试验研究[D]．青岛：青岛理工大学，2018.LI Jun-cheng.Experimental study on advanced treatment of nitrogen containing wastewater by three dimensional biofilm electrode reactor[D].Qingdao:Qingdao University of Technology,2018.(in Chinese)
[10]陈金銮．氨氮的电化学氧化技术及其应用研究[D]．北京：清华大学，2008.CHEN Jin-luan.Study and application of electrochemical oxidation technology for ammonia removal[D].Beijing:Tsinghua University,2008.(in Chinese)
[11] MELLOR R B,RONNENBERG J,CAMPBELL W H,et al.Reduction of nitrate and nitrite in water by immobilized,enzymes[J].Nature,1992,355(6362):717-719.
[12] SAKAKIBARA Y,FLORA J R,SUIDAN M T,et al.Modeling of electrochemically-activated denitrifying biofilms[J].Water Research,1994,28(5):1077-1086.