Abstract:Two fluidized biofilm reactors with microbubble aeration (MB) and conventional bubble aeration (CB) were operated simultaneously to compare their performances during start-up and stable operation. The biofilm formation and composition in both reactors were also investigated. The results showed the average removal efficiencies of COD, NH4+-N and TN were 90.3%, 92.7% and 43.4% in MB reactor during start-up and stable operation, respectively. The corresponding removal efficiencies in CB reactor were 79.4%, 86.3% and 29.3%, respectively. MB reactor presented more efficient performance of contaminant removal than CB reactor. In addition, the oxygen utilization efficiency in MB reactor reached 94.3%, which was much higher than that in CB reactor. Faster biofilm formation and larger biofilm biomass were achieved in MB reactor, compared with CB reactor. Moreover, the biofilm formed in MB reactor showed higher VSS/SS ratio and lower EPS content. These results demonstrated that biofilm formation was enhanced by microbubble aeration in MB reactor, which contained more active biomass.
刘春, 肖太民, 张晶, 杨亚男, 张静, 杨景亮. 微气泡曝气对生物膜反应器启动运行性能影响[J]. 中国环境科学, 2014, 34(12): 3093-3098.
LIU Chun, XIAO Tai-Min, ZHANG Jing, YANG Ya-Nan, ZHANG Jing, YANG Jing-Liang. Influence of microbubble aeration on start-up and performance of a biofilm reactor.. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(12): 3093-3098.