论文部分内容阅读
以某微污染河网水为原水,考察了膜生物反应器/粉末活性炭(MBR/PAC)工艺对其处理的效果和运行特性,并与超滤工艺进行比较。膜组件采用聚乙烯中空纤维超滤膜,膜孔径为0.2μm,面积为2 m2;组合工艺的活性炭和污泥浓度分别为0.5、2 g/L;通过时间控制器控制出水泵间歇运行,开/停时间比为8 min/2 min。结果表明:与超滤工艺相比,MBR/PAC工艺对CODMn、TOC、UV254、UV410等有机污染指标的去除效果显著提高,其中对UV410的去除率为85%~100%,对CODMn、TOC、UV254的去除率均可达50%以上,出水CODMn满足生活饮用水卫生标准。对氨氮、铁和浊度的去除率分别超过80%、87%和90%,出水值分别低于0.5 mg/L、0.1 mg/L和0.5 NTU,满足《生活饮用水卫生标准》(GB 5749—2006)的要求。
A slightly polluted river network water was used as raw water to investigate the effect and operating characteristics of membrane bioreactor / powdered activated carbon (MBR / PAC) process and compare with ultrafiltration technology. Membrane modules using polyethylene hollow fiber ultrafiltration membrane pore size of 0.2μm, an area of 2 m2; combined process of activated carbon and sludge concentrations were 0.5,2 g / L; through the time controller to control the discharge pump intermittent open / Stop time ratio is 8 min / 2 min. The results showed that compared with the ultrafiltration process, the MBR / PAC process significantly improved the removal efficiency of organic pollutants such as CODMn, TOC, UV254 and UV410, and the removal rate of UV410 was 85% -100% UV254 removal rates can reach more than 50%, effluent CODMn meet drinking water health standards. The removal rates of ammonia nitrogen, iron and turbidity are more than 80%, 87% and 90%, respectively, and the effluent values are lower than 0.5 mg / L, 0.1 mg / L and 0.5 NTU respectively, which meets the requirements of the standards of sanitary drinking water -2006) requirements.