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

Hongwei YANG; Haoyu WANG; Yunxia LIU; Wenjun LIU; Shaoxia YANG

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Journal of Tsinghua University(Science and Technology) ›› 2014, Vol. 54 ›› Issue (5) : 607-612.

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

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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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ozone (O3) / biological activated carbon (BAC) / trihalomethanes (THMs) / haloacetic acid (HAAs) / bromide

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Hongwei YANG, Haoyu WANG, Yunxia LIU, Wenjun LIU, Shaoxia YANG. Ozone-biological activated carbon treatment of DBP in high-bromide water[J]. Journal of Tsinghua University(Science and Technology). 2014, 54(5): 607-612

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