CAJ | 학술논문

比较了微气泡曝气(MB)与传统气泡曝气(CB)流化床生物膜反应器启动运行性能,以及生物膜形成过程与组成特性.结果表明,启动运行中,MB反应器的COD、NH4+-N和TN平均去除率分别达到90.3%、92.7%和43.4%,而CB反应器的COD、NH4+-N和TN平均去除率分别为79.4%、86.3%和29.3%,MB反应器污染物去除性能优于CB反应器.同时,MB反应器的氧利用率高达94.3%,显著高于CB反应器.MB反应器中生物膜形成速率和稳定生物膜生物量均高于CB反应器,并且所形成的生物膜VSS/SS比值较高而EPS含量较低.因此,微气泡曝气能够加速生物膜形成并获得更高的活性生物量,从而提高生物膜反应器的启动运行性能.
비교료미기포폭기(MB)여전통기포폭기(CB)류화상생물막반응기계동운행성능,이급생물막형성과정여조성특성.결과표명,계동운행중,MB반응기적COD、NH4+-N화TN평균거제솔분별체도90.3%、92.7%화43.4%,이CB반응기적COD、NH4+-N화TN평균거제솔분별위79.4%、86.3%화29.3%,MB반응기오염물거제성능우우CB반응기.동시,MB반응기적양이용솔고체94.3%,현저고우CB반응기.MB반응기중생물막형성속솔화은정생물막생물량균고우CB반응기,병차소형성적생물막VSS/SS비치교고이EPS함량교저.인차,미기포폭기능구가속생물막형성병획득경고적활성생물량,종이제고생물막반응기적계동운행성능.
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.