生物造粒流化床中颗粒污泥的物理性质及破碎与恢复特性研究  

Physical property of granular sludge in a fluidized-pellet-bed bioreactor and its breakage-recovery characteristics

作　　者：王晓昌[1] 邹林琳[1] 李侃[1] 朱蕊[1] 李忠民[1] 刘金光[1] 

机构地区：[1]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第1期60-64,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

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)

摘　　要：通过两套生物造粒流化床试验装置的并联和串联运行,运用摄影与图像分析、颗粒静沉和密度分析等方法,研究了流化床中颗粒污泥的物理性质及破碎与恢复特性.在作为一级柱(接受人工配置污水)运行的过程中,流化床主要经历了颗粒成长;在作为二级柱(接受一级柱出水)运行的过程中,流化床主要经历了颗粒破碎.试验结果表明,在多次轮回切换工作的过程中,流化床中的颗粒污泥具有动态稳定性,破碎的颗粒很容易得到恢复.颗粒污泥的有效密度随粒径而变化的趋势不明显,粒径-密度关系在双对数坐标图上始终处于同一领域,且远高于常规絮凝体的密度,表明流化床中形成的颗粒污泥具有密实的构造.The physical property of granular sludge generated in a fluidized-pellet-bed （FPB） bioreactor and its breakage-recovery characteristics were investigated by laboratory experiment using two sets of FPB columns under parallel and series operation modes. Particle size distribution was measured by photographing and image analysis, and particle density was measured by single particle sedimentation method. By series operation, the first FPB underwent mainly particle growth, while the second FPB underwent mainly particle breakage. The experimental results indicated that the granular sludge particles had very good dynamic stability. The broken particles could easily recover their previous state. The effective density of the granular sludge did not show a tendency of variation of particle density with particle size as the ordinary flocs. The size-density relation remained within a certain area in the log-log plot and with effective density much higher than the ordinary flocs, indicating that the granular sludge formed by FPB operation possessed a dense structure.

关 键 词：生物造粒 流化床 颗粒污泥 粒径分布 有效密度 

分 类 号：X703[环境科学与工程—环境工程]