HMBR法处理某黄金矿山氨氮废水试验研究

针对某黄金矿山外排水氨氮浓度较高的特点,采用复合式膜生物反应器(HMBR)系统进行处理。研究了在好氧区pH为弱酸性及中性条件下,HMBR法对氨氮和COD等典型污染物的去除特征。试验确定了HMBR法最佳工艺参数:好氧区pH值控制为6.80~7.20,DO为2~3 mg/L,动态曝气运行周期6 min(运行-间歇时间4 min^-2 min),在线化学清洗措施为“柠檬酸+水-次氯酸钠”,水力停留时间为2.34 d,HMBR出水中氨氮和COD均达到GB 8978—1996《污水综合排放标准》一级要求。该研究为HMBR法处理氨氮废水的工业化应用提供数据支持。

Experimental study on ammonia nitrogen wastewater in a gold mine by HMBR process

According to the high ammonia nitrogen concentration characteristics of the external drainage in a gold mine,the hybrid membrane bioreactor system(HBMR)is used for treatment.When the pH in the aerobic zone is weakly acidic and neutral,the operation of HMBR on the removal characteristics of typical pollutants such as ammonia nitrogen and COD was studied.The optimum process parameters of HMBR were proved by experiments:pH control of HMBR aerobic zone was 6.80-7.20,DO was 2-3 mg/L,and dynamic aeration operation cycle was 6 min(running-intermittent time:4 min^-2 min),the online chemical cleaning measures are"citric acid+water-sodium hypochlorite",and the system HRT is 2.34 d.Ammonia nitrogen and COD in the HMBR outflow meet the first-grade requirements of the GB 8978—1996 Integrated Wastewater Discharge Standard.The study provides data support for the industrial application of HMBR ammonia nitrogen wastewater treatment.