Hu Shao-Wei, Yang Feng-Lin, Liu Si-Tong, Gong Zheng
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
Huan Jing Ke Xue. 2009 Feb 15;30(2):416-20.
A carbon membrane-aerated biofilm reactor was developed to treat municipal wastewater, in which the carbon and nitrogen were removed simultaneously. The results showed that COD removal, NH4+-N removal and TN removal efficiency could reach 82.5%, 95.1% and 84.2%, respectively, under the conditions of intra-membrane pressure of 13.6 kPa, HRT of 14 h, influent COD and NH4+-N concentrations of 338 mg/L and 75 mg/L. However, in the last period during the operation of the reactor, the TN removal efficiency dramatically decreased because of the excessive growth of biomass on the nonwoven fiber, which also had serious negative effect on nitrification course. The microbiological community and spatial profiles were observed by fluorescence in situ hybridization and scanning electron microscopy. The anaerobic and anoxic bacteria were mainly located in the outer anaerobic region of the biofilm, while the aerobic ammonium oxidizing bacteria were mainly located in the inner aerobic region of the biofilm. The co-existing and coupling effect of aerobic nitrifying bacteria and anaerobic denitrifying bacteria provided the large biological potential for the simultaneous nitrification and denitrification in the carbon membrane-aerated biofilm reactor.
开发了一种碳膜曝气生物膜反应器来处理城市污水，该反应器可同时去除碳和氮。结果表明，在膜内压力为13.6 kPa、水力停留时间为14 h、进水化学需氧量（COD）和氨氮（NH4+-N）浓度分别为338 mg/L和75 mg/L的条件下，COD去除率、NH4+-N去除率和总氮（TN）去除率分别可达82.5%、95.1%和84.2%。然而，在反应器运行的最后阶段，由于非织造纤维上生物量过度生长，TN去除率急剧下降，这对硝化过程也产生了严重的负面影响。通过荧光原位杂交和扫描电子显微镜观察了微生物群落和空间分布。厌氧和缺氧细菌主要位于生物膜的外层厌氧区域，而好氧氨氧化细菌主要位于生物膜的内层好氧区域。好氧硝化细菌和厌氧反硝化细菌的共存和耦合作用为碳膜曝气生物膜反应器中同时进行硝化和反硝化提供了巨大的生物潜力。
