A novel membrane bioreactor enhanced by effective microorganisms for the treatment of domestic wastewater
A novel membrane bioreactor enhanced by effective microorganisms for the treatment of domestic wastewater
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DOI：
10.1007/s00253-005-0108-5
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发表时间：
2005-11-01
影响因子：
5
通讯作者：
Li, JW
中科院分区：
文献类型：
--
作者：
Jin, M;Wang, XW;Li, JW
活性污泥膜生物反应器（MBR）在生活污水处理和资源化方面具有一定的优势。我们假设，某些微生物，选择他们的能力，分解原污水的化学成分，将与MBR相结合时，显着提高该系统的稳定性和效率。我们选择了环境细菌菌株，氧化氨和亚硝酸盐，并产生蛋白酶，淀粉酶和纤维素酶的开发和测试的一种新的生物强化膜生物反应器（eMBR）。我们比较了eMBR和活性污泥MBR。采用eMBR，出水水质的平均值为：化学需氧量（COD），40 mg/l（平均去除率90.0%）;和NW 4 +-N，0.66 mg/l（平均去除率99.4%）。出水水质符合标准，在整个90天的研究期间保持稳定。活性污泥膜生物反应器对COD的去除率为91.7%，对NH 4 +-N的去除率为94.8%，低于eMBR。eMBR的启动时间仅为24-48小时，远短于标准MBR启动功能所需的7-8天。eMBR中总异养细菌和自养细菌的生物量浓度在研究过程中没有显著波动。各种微生物将在反应器中建立生态平衡。与活性污泥膜生物反应器相比，eMBR不仅出水水质稳定，而且启动时间短，NH 4 +-N去除效率显著提高。
The activated sludge membrane bioreactor (MBR) has been shown to have some advantages for the processing and reclamation of domestic wastewater. We hypothesized that certain microorganisms, chosen for their abilities to decompose the chemical components of raw sewage, would, when coupled with the MBR, significantly improve the stability and efficiency of this system. We selected environmental bacterial strains which oxidize ammonia and nitrites and produce protease, amylase, and cellulase for the development and testing of a novel biologically enhanced MBR (eMBR). We compared the eMBR with the activated sludge MBR. With the eMBR, the average values of effluent quality were: chemical oxygen demand (COD), 40 mg/l(average efficiency of removal 90.0%); and NW4+-N, 0.66 mg/l(average efficiency of removal 99.4%). Effluent qualities met the standard and were stable during the entire 90 days of this study. For the activated sludge MBR, the COD removal rate was 91.7%, and the NH4+-N removal (94.8%) was less than that of the eMBR. Start-up time for the eMBR was only 24-48 h, much shorter than the 7-8 days required to initiate function of the standard MBR. The biomass concentrations of total heterotrophic bacteria and autotrophic bacteria in the eMBR did not fluctuate significantly during the course of the study. Various kinds of microorganisms will establish an ecological balance in the reactor. Compared with the activated sludge MBR, the eMBR not only produced an excellent and stable quality of effluent but also resulted in a shorter time to start-up and significantly improved the efficiency of NH4+-N removal.