缺氧/好氧膜生物反应器处理尿液污水的研究

Treatment of urine wastewater with an anoxic/aerobic membrane bioreactor

采用缺氧/好氧膜生物反应器(A/OMBR)对尿液污水进行处理。结果表明:当进水NH+4N、COD和BOD5分别为400～980(容积负荷为0.42～1.01kg/(m3·d))、390～630和120～280mg/L时,平均去除率分别为79.5%、75.1%和95.0%,同时系统对色度也有一定的脱除效果,经过A/OMBR和活性炭(PAC)处理后出水色度降为8倍;运行期间膜污染较严重,膜内表面微生物的滋生和膜外表面形成沉积层是造成膜污染的主要原因。

An anoxic/aerobic membrane bioreactor was used to treat urine wastewater. The results showed that 79.5%, 75. 1% and over 95.0% NH4^＋-N, COD and BOD5 can be removed respectively when NH4^＋-N,COD and BOD5 in the influent was 400-980 （volume loading was 0.42--1.01 kg/（m^3· d））, 390-630 mg/L and 120-280 mg/L. Meanwhile, the color was decreased to 8 after further treatment by MBR and PAC filter. It was also found that membrane fouling was serious during the experimental period, mainly due to bio fouling on the inner membrane surface and sludge cake layer on the outer membrane surface.