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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 |
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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.
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| Keywords
ozone (O3)
biological activated carbon (BAC)
trihalomethanes (THMs)
haloacetic acid (HAAs)
bromide
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Issue Date: 15 May 2014
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2014,
Vol. 54
