改性砂高速过滤技术用于污水再生回用的研究  

Application of Modified Sand High-speed Filtration Technology to Reclaimed Wastewater Reuse

作　　者：贾仁勇[1,2] 孙力平[2] 齐兆涛[2] 吕建波[2] 衣雪松[2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]天津城市建设学院环境与市政工程系,天津300384

出　　处：《中国给水排水》2009年第3期15-19,共5页China Water & Wastewater

基　　金：天津市重大科技攻关项目(043112011)

摘　　要：采用SJ材料作为改性剂对石英砂滤料进行改性,经测定,其表面的物理化学性能优于石英砂。将改性砂应用于煤砂双层滤料高速过滤工艺,并处理某污水厂的二级出水,其出水的平均浊度、COD、UV254、PO43--P分别为1.23NTU、27.4mg/L、0.1335cm-1、0.42mg/L,对各项指标的去除率均高于石英砂滤料,且完全符合GB/T18920—2002标准中的城市杂用水水质要求。研究发现,高速过滤工艺应该以自然条件下的最大滤速为起始滤速;污染物积累和滤层负压导致水中溶解气体的析出会减小有效过水断面面积,这是引起滤速衰减的主要原因。SJ material gained from industrial waste was applied to modify quartz sand filter media. The physical and chemical properties of the modified sand were determined, being better than those of natural quartz sand. Anthracite and the modified sand were used as filter media of high-speed filtration process to treat the secondary effluent from a WWTP. The average turbidity, COD, UV254, PO4^3- - P of the filtration effluent are 1.23 NTU, 27.4 mg/L, 0. 133 5 cm^-1 and 0.42 mg/L respectively. The removal rates of pollutants by anthracite and the modified sand are higher than those by anthracite and natural quartz sand. The effluent quality meets the requirement of Reuse of Urban Recycling Water - Water Quality Standard for Urban Miscellaneous Water Consumption （ GB/T 18920 - 2002）. The initial filtration rate of high-speed filtration process should be the maximum filtration rate under natural conditions, and the causation of filtration rate decay is proved to be the reduction of the effective filtration area caused by the accumulation of pollutants and the separation of dissolved gas by filter vacuum.

关 键 词：改性砂 微絮凝 高速过滤 再生回用 

分 类 号：X703[环境科学与工程—环境工程]