污染控制技术及原理
刘海龙,王东升,程芳琴,汤鸿霄.微污染原水预臭氧化-强化混凝处理及其安全性[J].环境科学学报,2008,28(7):1320-1325
微污染原水预臭氧化-强化混凝处理及其安全性
- Treatment of micropolluted raw water and its safety during preozonation and enhanced coagulation
- 基金项目：
- 作者
- 单位
- 刘海龙
- 山西大学环境与资源学院, 太原 030006
- 王东升
- 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085
- 程芳琴
- 山西大学环境与资源学院, 太原 030006
- 汤鸿霄
- 中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085
- 摘要：以强化混凝和臭氧氧化技术为核心建立了中试水处理设备,采用有机物表观分子量分级、树脂分级等手段表征了原水有机物及其THMFP特征;通过实验室试验和中试运行对预臭氧和强化混凝技术应用中有机物去除效果、消毒副产物THM的产生和消除进行了研究;研究了臭氧应用中可能形成的相关副产物甲醛、溴酸盐等对饮用水安全性影响的问题.结果表明:预臭氧-强化混凝处理效果较好,采用适当浓度的臭氧(如1.0mg·L-1)进行预氧化,可以有效提高有机物去除率,从常规混凝滤后水的33.7%提高到48%,有机物浓度降到1.385mg·L-1;THMFP总体去除效果从常规处理的131μg·L-1降至53μg·L-1;未出现甲醛、溴酸盐超标的问题,对余铝没有显著影响,安全性较高;但是,AOC含量比常规混凝和强化常规混凝升高,可能增进微生物的繁殖和对管网等的腐蚀,需要进一步控制.
- Abstract：A pilot-scale drinking water treatment facility based on enhanced coagulation and ozonation was built. Organic matter and its Trihalomethane Formation Potential (THMFP) in raw water were characterized by Apparent Molecular Weight Distribution (AMWD) and resin fractionation. Jar-scale and pilot-scale experiments were conducted to investigate the removal efficiency of organic matter and the formation and removal of the disinfection by-product THM during preozonation and enhanced coagulation. Formation of formaldehyde and bromate, which affect the safety of treated water, was also studied during the preozonation and enhanced coagulation treatments. The results show that preozonation combined with enhanced coagulation yielded the best removal efficiency. When an ozone concentration of 1.0 mg·L-1 was used, removal of Dissolved Organic Carbon (DOC) was increased from 33.7% (after conventional coagulation and filtration) to 48% and a residual DOC value of 1.385 mg·L-1 was obtained. During the combined treatment, THMFP was reduced from 131μg·L-1 (conventional coagulation) to 53μg·L-1. The concentrations of formaldehyde and bromate after preozonation-enhanced coagulation were below the applicable standards. Assimilated Organic Carbon (AOC), however, increased compared with conventional coagulation and enhanced coagulation alone. AOC may stimulate the proliferation of microorganisms, cause pipe corrosion problems and therefore needs to be controlled.
摘要点击次数： 2218 全文下载次数： 2824
