去除致嗅物质的不同填料曝气生物滤池的启动特性与去除效果比较

Comparison of Start-up Characteristics and Odorant Removal Efficiencies of Biological Aerated Filters Different in Filling

搭建了填料分别为生物陶粒(CPs)和颗粒活性炭(GAC)的2个曝气生物滤池(BAF)反应器,通过考察土嗅素和2-甲基异崁醇(2-MIB)这2种致嗅物质的去除效果和稳定周期,研究不同填料BAF的启动与挂膜特性。结果表明,在相同进水条件下,2种填料BAF去除溶解性总有机碳(DOC)的效率无明显差异,均在24 d时达到稳定,且DOC去除率均基本稳定在70%以上。2种填料BAF去除土嗅素和2-MIB所需的启动时间有较大差异,CPs-BAF启动时间分别为30和26 d,而GAC-BAF启动时间分别为62和43 d。GAC-BAF和CPs-BAF对土嗅素的去除率分别稳定在约95%和69%,前者的去除率和稳定性明显高于后者;GAC-BAF和CPs-BAF对2-MIB的去除率分别稳定在约75%和73%,两者相差不大,但前者的稳定性强于后者。

Two biological aerated fiher （BAF） reactors using different fillings, separately, i.e. ceramic pellets （CPs） and granular active carbon （GAC）, were built and used to remove geosmin and 2 -MIB from water. Further, their start- up characteristics were investigated by comparing odorant removal efficiencies and start-up time. At the same influent wa- ter, the two BAFs were quite similar in dissolved organic carbon （DOC） removal efficiency and both removal rates stabi- lized over 70% in 24 days. However, the two BAFs differed significantly in start-up time for removing geosmin and 2- MIB, separately, i.e. 30 and 26 days respectively in CPs-BAF and 62 and 43 days respectively in GAC-BAF. Moreover, the geosmin removal rates in GAC-BAF and CPs-BAF were stable at about 95% and 69%, respectively, and the rate and stability for geosmin removal of the former was obviously higher than of the latter. And the removal rates of 2 - MIB in GAC-BAF and CPs-BAF were similar to each other and stable at about 75% and 73% , respectively, but the stability of the former was higher than of the latter.