固定床生物反应器处理铀矿冶废水中NO-3模拟试验研究  

Simulated Experimental Study on the Treatment of Nitrate in Uranium Mining Wastewater by Fixed-bed Bioreactor

作　　者：周文[1] 苏豪 雷治武 胡鄂明[1] 王清良[1] ZHOU Wen;SU Hao;LEI Zhiwu;HU Eming;WANG Qingliang(School of Resource Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China;School of Chemistry and Chemical Engineering,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学资源与环境安全工程学院,湖南衡阳421001 [2]南华大学化学化工学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2020年第5期37-43,共7页Journal of University of South China：Science and Technology

基　　金：核能开发项目(190GJG001)。

摘　　要：针对铀矿冶废水中存在过量硝酸根的问题,通过以轻质黏土陶粒为载体的上流式固定床生物反应器对模拟的铀矿山废水进行了NO-3的去除试验研究。考察了载体种类、挂膜次数、NO-3质量浓度、pH、n(C)/n(N)和水力停留时间(hydraulic retention time,HRT)等因素对反硝化效果的影响,结果表明生物反应器对硝酸根去除效果良好。以NO-3质量浓度为500 mg/L模拟废水进行流动实验,tHRT由6 h下降至2 h的过程中,反应体系稳定后NO-3去除率均为100%,达到了预期的去除效果。Aiming at the problem of excessive nitrate in uranium mining wastewater,a NO-3removal test study on simulated uranium mine wastewater using an upflow fixed bed bioreactor with light clay ceramsite as a carrier was carried out.The effects of factors such as carrier type,number of hanging films,NO-3mass concentration,pH,ratio of COD concentration to NO-3 concentration and hydraulic retention time(HRT)on the denitrification effect were investigated,and the results show that the bioreactor has a good effect on nitrate removal.The flow experiment was performed with simulated wastewater with NO-3 concentration of 500 mg/L.During the reduction of HRT from 6 h to 2 h,the NO-3 removal rate was 100%after the reaction system was stable,and the expected removal effect was achieved.

关 键 词：反硝化细菌 地浸采铀 硝酸根 生物反应器 

分 类 号：X703.1[环境科学与工程—环境工程]