Wang Guangzhi, Chen Rui, Huang Likun, Ma Hemeng, Mu Deying, Zhao Qingliang
School of Environment, Harbin Institute of Technology, Harbin 150090, China.
School of Food Engineering, Harbin University of Commerce, Harbin 150076, China E-mail:
Water Sci Technol. 2018 Feb;77(3-4):1089-1097. doi: 10.2166/wst.2017.628.
An aerobic moving bed biofilm reactor (MBBR) was applied to treat landfill leachate generated from a domestic waste incineration plant. Pollutant removal efficiency of this reactor under stable operating condition was studied. The biomass, bacteria species, and microbial metabolism in this reactor were investigated. These results showed that the average removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen in the aerobic MBBR achieved 64% and 97% in the optimum conditions, respectively. The three-dimensional fluorescence spectrum revealed that the content of soluble microbial byproducts from extracellular polymeric substances extraction in suspended sludge was much higher than that on biofilm, and the types of pollutants were various in different regions of the reactor. It also indicated that the MBBR system had a stable, rich and regular microorganism community, including large amounts of nitrifying bacteria and denitrifying bacteria. Scanning electron microscopy suggested that biofilm attached to the packing provided a good anoxic-aerobic micro environment system to achieve a high metabolic activity, which favored COD and ammonia removal.
采用好氧移动床生物膜反应器（MBBR）处理生活垃圾焚烧厂产生的垃圾渗滤液。研究了该反应器在稳定运行条件下的污染物去除效率。对该反应器中的生物量、细菌种类和微生物代谢进行了研究。结果表明，在最佳条件下，好氧MBBR对化学需氧量（COD）和氨氮的平均去除效率分别达到64%和97%。三维荧光光谱显示，悬浮污泥中胞外聚合物提取的可溶性微生物副产物含量远高于生物膜上的含量，且反应器不同区域的污染物类型各异。这也表明MBBR系统具有稳定、丰富且规则的微生物群落，包括大量的硝化细菌和反硝化细菌。扫描电子显微镜表明，附着在填料上的生物膜提供了良好的缺氧-好氧微环境系统，以实现较高的代谢活性，有利于COD和氨的去除。
