超滤/臭氧氧化工艺对再生水中AOC的去除效果  

Removal of Assimilable Organic Carbon in Reclaimed Water by Ultrafiltration/Ozonation Process

作　　者：赵欣[1] 蒋丰[1,2] 李明堂[2] 胡洪营[1,3] 李淑华 

机构地区：[1]清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京100084 [2]吉林农业大学资源与环境学院,吉林长春130118 [3]清华大学深圳研究生院国家环境保护环境微生物利用与安全控制重点实验室,广东深圳518055 [4]桑德集团肖家河污水处理有限公司,北京100091

出　　处：《中国给水排水》2012年第23期18-21,共4页China Water & Wastewater

基　　金：国家自然科学基金资助重点项目(51138006);国家杰出青年科学基金资助项目(50825801)

摘　　要：如何控制微生物生长、保障水质生物稳定性,是再生水输配与利用过程中关注的重要问题。可同化有机碳(AOC)是评价水质生物稳定性的重要指标。对北京市某再生水厂超滤/臭氧氧化处理过程中AOC浓度及其分子质量分布特性的变化进行了研究,结果表明:二级出水中的AOC主要为分子质量>10 ku的有机物,超滤对二级出水中有机物的去除效果良好,对AOC的去除率达到73%。臭氧氧化可提高有机物的可生化性,导致AOC浓度升高了48%。在二级出水和超滤出水中,AOC物质以分子质量>10 ku的有机物为主,分别占79%和59%;经臭氧处理后,小分子质量(<1 ku)有机物对AOC的贡献明显上升,所占比例达到74%,同时大分子质量(>10 ku)和中等分子质量(1～10 ku)有机物所占的比例分别下降到22%和3%。Control of microbial growth and biostability is important to the transportation, distribu- tion and use of reclaimed water. Assimilable organic carbon （AOC） is an important index to evaluate wa- ter biostability. The changes in AOC concentration and its molecular weight distribution in the ultrafiltra- tion/ozonation treatment process were investigated in a reclaimed water plant in Beijing. The results showed that the AOC in the secondary effluent was mainly composed of macromolecular organic com- pounds （more than 10 ku）. The removal rate of AOC in ultrafiltration was 73%. Ozonation could im- prove the biodegradability of organic matters in reclaimed water, resulting in a 48% increase in AOC.The proportions of AOCs with molecular weight more than 10 ku to total AOC were 79% and 59% in the secondary effluent and after uhrafihration, respectively. The proportion of AOCs with molecular weight less than 1 ku increased to as high as 74% after ozonation. Meanwhile, the proportions of AOC with mo- lecular weights of more than 10 ku and of 1 to 10 ku decreased to 22% and 3% respectively after ozona- tion.

关 键 词：再生水 可同化有机碳 超滤 臭氧氧化 生物稳定性 分子质量分布 

分 类 号：X703[环境科学与工程—环境工程]