Pretreatment of bromamine acid by combined TiO2/UV and ozone

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  • School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116023, China

Received date: 2004-07-09

  Online published: 2010-10-01

Abstract

The pretreatment of bromamine acid of middle or lower level COD value is conducted by combined TiO2/UV and ozone.The experimental results indicate that a synergic effect of combined TiO2/UV and ozone on the decomposition of bromamine acid exists,inherently due to more hydroxyl radicals produced synergetically by TiO2/UV and ozone.The initial pH value has little influence on the degradation by combined TiO2/UV and ozone. The removal rate of COD levels off to the range of 90%-95%. After a short time of catalytic degradation of bromamine acid,the decolorization efficiency reaches over 70% and the value of COD is decreased at certain degree.At the same time,the value of BODS/COD increases from 0.030-0.043 to 0.320-0.368,which means that biodegradability of the wastewater is largely raised.All the above factors will benefit the subsequent biologi-cal treatment.

Cite this article

Hu Jun, Zhou Jiti, Sun Liying, Yang Song . Pretreatment of bromamine acid by combined TiO2/UV and ozone[J]. Industrial Water Treatment, 2004 , 24(12) : 34 -36 . DOI: 10.11894/1005-829x.2004.24(12).34

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