【摘要】 对内置转盘式膜-生物反应器(SRMBR)处理污水工艺进行了研究.进水COD 160~368 mg/L时,出水COD在运行1d后降低到20 mg/L以下,去除率大于90%;转盘式膜组件的转速在0~25 r/min范围内,平衡膜通量随转速增大而快速增加,继续增大转速则平衡膜通量的增加变得不显著;在一定范围(0~1min)内延长停抽时间有助于缓解膜污染;SRMBR在较低的气水比(15∶1)下运行,也可达到较高的平衡膜通量.研究表明,SRMBR在最佳组合操作条件(转速为25r/min,抽/停为9min/1min,气水比为15∶1,抽吸压力为25kPa)下运行,其平衡膜通量高达53.75L/(m2.h).更多还原

【Abstract】 The process for wastewater treatment in submerged rotating membrane bioreactor(SRMBR) was studied.It was found that the effluent COD reduced to 20(mg/L) after one day running when the influent COD varied from 160(mg/L) to 368(mg/L).The equilibrium membrane flux increased rapidly with increasing rotation speed of membrane in the range of 0 to(25r/min.) Within one minute,the increase of suspended suction time could alleviate the membrane fouling.Moreover,higher membrane flux could be reached even at lower aeration/water ratio(15∶1) in SRMBR process. The optimum processing condition was suggested as follows: the rotation speed was(25r/min,) suction time/suspended time was(9min/1min,) aeration/water ratio was 15/1,and operation pressure was 25kPa.Under this condition,the equilibrium membrane flux could reach 53.75(L/(m~2·h).)更多还原