摘要
为了考察曝气量对序批式生物膜反应器(SBBR)除磷效果的影响,采用厌氧/好氧交替运行的方式,通过控制好氧反应过程中的曝气量,研究了不同曝气量时SBBR的好氧吸磷效果,以及不同曝气量对生物膜脱落量的影响,并推导了生物除磷过程中生物膜内溶解氧的扩散模型。结果表明,曝气量是影响生物除磷效果的一个重要因素,为了满足生物膜内聚磷菌对氧的需求量,加快氧的传递速率,增加活性生物膜的厚度,加快聚磷菌的好氧吸磷速率,必须提高液相主体中溶解氧的含量。选择适宜的曝气量能够促进生物膜的脱落与更新,起到调控污泥龄的作用,从而增强生物除磷的稳定性。
In order to investigate the effect of aeration rate on biological phosphorus removal in sequencing batch biofilm reactor（SBBR）, the aerobic phosphorus uptake efficiency of SBBR at different aeration rates and the influence of different aeration rates on biofilm detachment quantity were studied by using alternating anaerobic/aerobic operation mode and controlling aeration rate during aerobic reaction.The diffusion model of DO in biofilm during biological phosphorus removal was deduced.The results show that the aeration rate is a key factor affecting biological phosphorus removal.The DO concentration in liquid phase must be increased to meet the oxygen demand of phosphorus accumulating organisms（PAOs） in biofilm,quicken the transfer rate of oxygen,increase the active thickness of biofilm and accelerate the aerobic phosphorus uptake.On the other hand,the appropriate aeration rate can promote biofilm detachment and regeneration to control sludge age and enhance stable phosphorus removal.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第5期72-76,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(50578044)
国家“十一五”科技支撑计划重点项目(2006BAC19B03)
