膜吸附生物反应器(MABR)用于饮用水去除有机物

Membrane adsorption bioreactor (MABR) for organics removal in drinking water treatment

为更加有效地制备优质饮用水,考察了膜吸附生物反应器(MABR)强化去除水中有机污染物的效能.结果表明,当粉末活性炭(PAC)投加量为8mg/L时,MABR对进水中TOC、CODMn、DOC、UV254以及BDOC和AOC的去除率分别达41.3%,59.4%,36.7%,53.5%,67.9%和44.0%.在MABR中,膜的物理截留作用、生物降解作用以及PAC的吸附作用协同完成对溶解性有机污染物的去除;就DOC而言,3种作用的贡献分别为11.1%,7.6%和18.0%.微观分析结果表明,MABR中膜表面的动态污泥层能强化膜对混合液中溶解性有机物的截留.考虑到0.5h的短水力停留时间,MABR无论是从技术上还是从经济上考虑都有着很好的应用前景.

To produce high quality drinking water more effeciently, a submerged membrane adsorption bioreactor （MABR） was evaluated for enhanced removal of organic matter from contaminated raw water. The results showed that the MABR was able to decrease influent TOC, CODMn, DOC and UV254, as well as BDOC and AOC by 41.3%, 59.4%, 36.7%, 53.5%, 67.9% and 44.0%, respectively, when powdered activated carbon （PAC） was dosed in the reactor at 8 mg/L. In the MABR, physical separation by the membrane, biodegradation by microorganism and adsorption by PAC were identified to jointly contribute to the removal of dissolved organic matter, with the respective contribution of 11.1%, 7.6% and 18.0% in terms of DOC removal. However, enhanced separation effect on dissolved organic matter in the mixed liquor was observed for the membrane in MABR, which was attributed to a dynamic sludge layer formed on the membrane surface based on microscopic analysis. Taking into account of the short hydraulic retention time （0. 5 h）, MABR technology may be both technically and economically promising for application in drinking water treatment.