研究报告
朱洪涛,孙鹏程,文湘华,黄霞.预臭氧化对二级出水微滤过程中膜有机物污染的影响[J].环境科学学报,2011,31(8):1633-1639
预臭氧化对二级出水微滤过程中膜有机物污染的影响
- Effect of pre-ozonation in microfiltration of secondary effluent organic matter
- 基金项目：北京林业大学青年科技启动基金(No.BLX2009020);国家重点实验室开放基金课题(No.10K07ESPCT)
- 作者
- 单位
- 朱洪涛
- 北京林业大学,污染水体源控与生态修复技术北京市高等学校工程研究中心,北京100083
- 孙鹏程
- 山西省环境规划院,太原, 030002
- 文湘华
- 清华大学,环境科学与工程系环境模拟与污染控制国家重点实验室,北京100084
- 黄霞
- 清华大学,环境科学与工程系环境模拟与污染控制国家重点实验室,北京100084
- 摘要：在二级出水溶解性有机物(secondary effluent organic matter, EfOM)的微滤过程中,多种因素均与膜的有机污染相关,比如总有机物的含量,溶解性有机物的亲疏水性组成等.本文主要研究了在二级出水微滤过程中溶解性有机物的膜污染,以及预臭氧化对二级出水溶解性有机物性质的影响进而对膜有机污染的影响.EfOM和其亲水组分(HIS)、疏水组分的微滤试验结果显示,亲水组分具有更强的污染潜能.原因可能在于HIS组分含有更多的溶解性微生物产物(SMP)或者类似SMP的物质,而这类物质具有分子量更大、羧酸基团含量更高的特点.溶解性有机物质的预臭氧化增加了其羧酸基团和酚羟基团的含量,这可能会导致膜污染的加重.然而预臭氧化的另一个效果是使其总溶解性有机碳(DOC)减少,并且使大的有机物分子分解,从而最终使得预臭氧化后的溶解性有机物微滤膜污染有所减轻.
- Abstract：We studied membrane organic fouling during microfiltration with secondary effluent organic matter (EfOM).The effects of pre-ozonation on the characteristics of EfOM and on EfOM membrane fouling were also investigated.The results show that hydrophilic substances (HIS) have a higher fouling potential due to a higher content of macromolecular and carboxylic groups and also higher soluble microbial products (SMP) or SMP-like substances.Pre-ozonation of EfOM increased the amount of carboxylic and phenolic groups, which could have aggravated membrane fouling.However, the reduction of dissolved organic carbon (DOC) (including the mineralization of small organic molecules) and the breakage of large molecules are suggested to be the major criteria for fouling reduction.
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