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

摘要

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24d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 startup characteristics were investigated by comparing odorant removal efficiencies and start-up time.At the same influent water,the two BAFs were quite similar in dissolved organic carbon (DOC) removal efficiency and both removal rates stabilized 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.