O3-BAC工艺对含溴水体消毒副产物生成势的影响

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O₃-BAC工艺对含溴水体消毒副产物生成势的影响

杨宏伟¹(

),王昊宇¹,刘云霞²,刘文君¹,杨少霞²

2. 华北电力大学可再生能源学院, 北京 102206

Ozone-biological activated carbon treatment of DBP in high-bromide water

Hongwei YANG¹(

),Haoyu WANG¹,Yunxia LIU²,Wenjun LIU¹,Shaoxia YANG²

1. School of Environment, Tsinghua University, Beijing 100084, China
2. Renewable Energy School, North China Electric Power University, Beijing 102206, China

摘要:

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摘要该文主要研究了含溴水体在经过臭氧-生物活性炭(O₃-BAC)工艺处理前后消毒副产物生成势的变化。通过加氯培养测定三卤甲烷(THMs)和卤乙酸(HAAs)的生成势。结果表明: 进水经过臭氧-生物活性炭系统处理后,总三卤甲烷(TTHM)和9种卤乙酸(HAA9)的生成势均降低了20 μg/L左右, 抑制率在30%以上。其中,主要去除的是一些含氯的消毒副产物如三氯甲烷、二氯乙酸和三氯乙酸的前体物。当原水中含有高质量浓度的Br^-时,臭氧化可能会导致含溴消毒副产物(如三溴甲烷、一溴乙酸和二溴乙酸)占总消毒副产物的分配比例升高。同时,研究表明: 活性炭对于溴代副产物(Br-DBPs)前体物的去除效果低于氯代副产物(Cl-DBPs), 因此在经过Q₃-BAC工艺处理后,消毒副产物生成势中,溴代产物所占分配比例进一步增加。

关键词 ：臭氧(O3),生物活性炭(BAC),三卤甲烷(THMs),卤乙酸(HAAs),溴

Abstract：The disinfection by-product (DBP) formation of high-bromide water was evaluated before and after ozone and biological activated carbon (O₃-BAC) treatment. The objective is to remove trihalomethanes (THMs) and haloacetic acids (HAAs) formed by adding chlorine. The results showed that the O₃-BAC treatment reduced the total trihalomethanes (TTHM) and nine haloacetic acid (HAA9) by 20 μg/L. The inhibitory rate was above 30%. Precursors of chloro-byproducts (Cl-DBPs) like chloroform, dichloroacetic acid and tichloroacetic acid were also removed. Chloriation of high-bromide water increases the proportion of bromo-byproducts (Br-DBPs) such as bromform, bromoacetic acid and dibromoacetic acid after the pre-ozonation. The BAC treatment reduces the Br-DBP less than that of Cl-DBPs, which resulted in further increases of the Br-DBP proportion.

Key words：ozone (O3)biological activated carbon (BAC)trihalomethanes (THMs)haloacetic acid (HAAs)bromide

收稿日期: 2012-05-08 出版日期: 2015-09-03

ZTFLH:

基金资助:国家自然科学基金重大项目资助 (51290284);国家自然科学基金面上项目资助 (51278269)

引用本文:

杨宏伟, 王昊宇, 刘云霞, 刘文君, 杨少霞. O₃-BAC工艺对含溴水体消毒副产物生成势的影响[J]. 清华大学学报（自然科学版）, 2014, 54(5): 607-612.
Hongwei YANG, Haoyu WANG, Yunxia LIU, Wenjun LIU, Shaoxia YANG. Ozone-biological activated carbon treatment of DBP in high-bromide water. Journal of Tsinghua University(Science and Technology), 2014, 54(5): 607-612.

链接本文:

http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2014/V54/I5/607

图表:

指标	平均值	范围
pH	7.9	7.6~8.5
Br^-/(μg·L^-1)	135	120~150
COD_Mn/(mg·L^-1)	2.4	2.2~3.1
UV₂₅₄/(cm^-1)	0.047	0.039~0.053
DOC/(mg·L^-1)	2.51	2.24~2.68
碱度/(mg·L^-1,以CaCO₃计)	174	167~183
NH₃-N/(mg·L^-1)	0.15	0.05~0.23

原水水质状况

给水厂工艺流程图

三卤甲烷的生成和分配情况

卤乙酸的生成和分配情况

溴结合因子(N_Br)随流程变化

参考文献:

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