投加粉末活性炭强化好氧颗粒污泥的稳定性  

Enhancement of Stability of Aerobic Granules by Powdered Activated Carbon Addition

作　　者：魏燕杰[1,2] 季民[1] 李国一[2] 秦菲菲[3] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]交通运输部天津水运工程科学研究所,水路交通环境保护技术交通行业重点实验室,天津300456 [3]天津塘沽中法供水有限公司,天津300450

出　　处：《天津大学学报》2012年第3期247-253,共7页Journal of Tianjin University(Science and Technology)

基　　金：天津市科技攻关计划资助项目(06YFGZSH06700);国家水体污染控制重大专项资助项目(2009ZX07314-002)

摘　　要：好氧颗粒污泥系统稳定运行一段时间后,往往会发生颗粒污泥解体现象,系统内水力选择压与基质选择压之间的平衡失调,是导致颗粒污泥解体、系统失调的内在诱因.采用了投加粉末活性炭(PAC)强化好氧颗粒污泥稳定性的调控措施.结果发现,PAC的投加对污泥物理性状及微生物生长动力学方面影响明显:投加PAC可以强化系统内水力选择压,提高污泥的湿密度和强度,降低污泥生长速率和产率,调节污泥浓度和粒径大小,降低粒径分布分散化的趋势,避免因传质阻力引起的颗粒内部分裂,保证好氧颗粒污泥系统持久维持稳定.PAC的投加对污泥化学性状影响甚微:不管投加PAC污泥与否,在颗粒污泥形成过程中均伴随着胞外蛋白浓度的增加及污泥表面相对疏水性的上升.Due to the disorder of balance between hydraulic and substrate selective pressures, a great quantity of aerobic granules began to break down into flocculent sludge after a while of stable operation period. Powdered acti- vated carbon （PAC） was used to regulate the hydraulic selective pressure and strengthen the stability of aerobic gran- ules. Experimental results showed that PAC addition had great effects on the physical properties of sludge and micro- bial growth kinetics： PAC addition could enhance granular wet density and strength, slow down the sludge growth rate and yield rate, moderate the sludge concentration and size, and reduce the dispersion trend of size distribution, so as to avoid internal segmentation of granule and improve the stability of aerobic granular sludge system. PAC addition had little effect on the chemical properties of sludge： the aerobic granulation process was accompanied with increments of extracellular protein content and surface relative hydrophobicity, whether PAC was added or not.

关 键 词：好氧颗粒污泥 稳定性 选择压 粉末活性炭 

分 类 号：X703[环境科学与工程—环境工程]