摘要
为了考察延长水力停留时间对改善生物造粒流化床对有机物去除效果的影响,进行了二级串联生物造粒流化床的工艺试验,在每隔12 h进行串联顺序交替的运行条件下,两柱中的颗粒污泥均能保持108个/g数量级的生物量,且在作为二级柱运行的过程中,流化床仍能保持良好的颗粒污泥形态。两级串联的流化床中,CODCr的去除和DO的消耗具有延续性,且CODCr的去除符合相近的一级反应规律。研究结果表明,生物造粒流化床中的颗粒污泥具有良好的动态稳定性,采用二级串联的方法延长流化床的水力停留时间有望作为提高生物造粒流化床污水处理功效的方法。
In order to understand the removal of organic matter in the fluidized pellet bed (FPB) bioreactor by extending hydraulic retention time (HRT), a 2-stage serial FPB bioreactor was used for laboratory experiment. Under a condition of changing the sequence of the two reactor columns every 12 hours, a biomass concentration of 108ind./g could be maintained and the sludge particles could keep good granular shape in both columns. The removal of COD_(Cr) and consumption of DO showed a continuity in the two columns. A first order kinetic relationship could be found for COD_(Cr) in both columns with quite similar kinetic coefficients. The results indicated that the granular sludge in the FPB had very good dynamic stability, and the 2-stage serial FPB operation could provide an effective way to extend HRT and to improve the efficiency of pollutant removal.
出处
《给水排水》
CSCD
北大核心
2009年第S2期131-135,共5页
Water & Wastewater Engineering
基金
国家自然科学基金资助项目(50778148)
国家水体污染与控制重大专项课题(2008ZX07317-004)
关键词
生物造粒流化床
二级串联
颗粒化
动态稳定性
Fluidized pellet bed bioreactor
2-stage serial
Granulation
Dynamic stability
