选矿循环水降氮工艺研究  

Study on Nitrogen Reduction Process of Circulating Water of Mineral Processing

作　　者：季红军 王玉洁 JI Hongjun;WANG Yujie(Mining Branch,Baowu Resources Nanjing Baodi Meishan Industrial City Development Co.,Ltd.)

机构地区：[1]宝武资源南京宝地梅山产城发展有限公司矿业分公司,江苏省南京市210041

出　　处：《现代矿业》2025年第3期214-218,共5页Modern Mining

摘　　要：为了降低高浓度总氮选矿循环水的处理成本及不达标环水对周边环境造成的危害,针对选矿循环水降氮问题,以出水化学需氧量(COD)变化值、总氮(TN)、氨氮(NH_(3)-N)和硝氮(NO_(3)-N)为检测指标,通过控制反应时间和缺氧与好氧时间比值,进行了厌氧好氧(A/O)工艺和序批式活性污泥(SBR)工艺最佳工艺参数研究。研究结果表明:A/O反应器在反应至27 d后,各项指标已达到排放标准;SBR反应器中各指标去除率随好氧时间的增加而上升,当h_(缺氧)∶h_(好氧)=3∶3时,TN、NH_(3)-N、NO_(3)-N的去除率达到最大值;采用A/O反应器和SBR反应器进行选矿废水降氮处理时的最佳工艺参数分别为反应时间27 d和h_(缺氧)∶h_(好氧)=3∶3。In order to reduce the treatment cost of circulating water of mineral processing with high concentration total nitrogen and the harm to the surrounding environment caused by substandard circulating water,aiming at the problem of nitrogen reduction in mineral processing circulating water,the change value of effluent chemical oxygen demand(COD),total nitrogen(TN),ammonia nitrogen(NH_(3)-N)and nitrate nitrogen(NO_(3)-N)are used as detection indexes.By controlling the reaction time and the ratio of anoxic to aerobic time,the optimal process parameters of anaerobic/aerobic(A/O)process and sequencing batch acti-vated sludge(SBR)process are studied.The results show that the indexes of A/O reactor have reached the emission standard after 27 days of reaction.The removal rate of each index in SBR reactor increased with the increase of aerobic time.When h_(anoxic)∶h_(aerobic)=3∶3,the removal rate of TN,NH_(3)-N and NO_(3)-N reached the maximum.The optimum process parameters for nitrogen reduction treatment of mineral processing wastewa-ter by A/O reactor and SBR reactor are reaction time of 27 d and h_(anoxic)∶h_(aerobic)=3∶3.

关 键 词：选矿循环水 A/O工艺 SBR工艺 反应时间 缺氧好氧 

分 类 号：X70[环境科学与工程—环境工程]