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preozonation of bromide-bearing source water in south China

Journal of Environmental Sciences 2006年第2期18卷 209-213页

作者： GUO Zhao-hai YANG Min ZHANG YU PEI Yi-shan ZHANG Jing-song FAN Jie Junji HIROTSUJI Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Shenzhen Water （Group） Co. Ltd. Shenzhen 518031 China Advanced Technology R＆D Center Mitsubishi Electric Corporation Japan

The effectiveness of preozonation was evaluated on treating a bromide-bearing dam source water in south China through batch-scale experiments. preozonation at ozone doses of 0.5-1.0 mg/L （at ozone consumption base） enhanced total organic carbon （TOC） removal through coagulation, and resulted in an almost linear reduction of ultraviolet absorbance at 254 nm （LW2s4）. The removals of TOC （after coagulation） and UV254 at the ozone dose of 1.0 mg/L were 36% and 70%, respectively. preozonation at an ozone dose between 0.5 and 1.0 mg/L resulted in the removal of disinfection byproducts formation potential （DBFP） including trihalomethane formation potential （THMFP） and haloacetic acid formation potential （HAAFP） for about 50%. The removals of THMFP and HAAFP decreased with the further increase of ozone dose. Ozonation of bromide-bearing water （bromide concentration, 34 μg/L） produced a bromate concentration under the detection limit（2μg/L） at ozone doses 〈1.5 mg/L. However, bromate 〉10μg/L could be produced when the bromide concentration was increased to 96 μg/L.

关键词： ozone drinking water preozonation disinfection byproducts formation potential (DBFP) bromate formation

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Orthogonal Experiments for Controlling the Formation of DBPs During preozonation of Bromide-Containing Raw Water

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Transactions of Tianjin University 2014年第3期20卷 189-196页

作者：张怡然王启山王宏超靳冲李多鲁金凤 College of Environmental Science and Engineering Nankai University

Orthogonal method was adopted to optimize the preozonation process and to minimize the bromate formation. Factors such as contact time, pH and ammonia concentration were investigated by orthogonal experiments to understand the interaction of various operation conditions on the formation of bromate and other disinfection byproducts(DBPs). Results showed that pH had the most significant influence on the minimization of bromate formation. The factors influencing the formation of bromate were in order of pH > contact time > ammonia concentration. For the formation of trihalomethanes(THMs) and haloacetic acids(HAAs), however, contact time significantly influenced their formation potential. In the practical preozonation process of waterworks, it is appropriate to set preozonation contact time to be 20 min. In order to minimize the formation of bromate, pH value of the raw water should be adjusted to 6. 0, and a certain concentration of ammonia could be added into the water to strengthen the minimization effect when the concentration of bromide in the raw water is higher than that in the experimental water.

关键词： orthogonal experiment preozonation bromate THMs HAAs

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Comparative study on combined preoxidation by potassium permanganate composites with chlorine and preozonation for enhancing coagulation

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Journal of Harbin Institute of Technology(New Series) 2009年第6期16卷 849-853页

作者：梁恒郑文禹公维佳任南琪李圭白 State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology National Engineering Research Center of Urban Water Resources Harbin China Northeast Municipal Engineering Design and Research Institute School of Engineering Northeast Agriculture University

Comparative pilot tests were conducted to investigate the coagulation-aid effects of the combined preoxidation by potassium permanganate composites （PPC） with chlorine and preozonation. And the synergistie mechanism of combined preoxidation was discussed. Results showed that 1.0 mg/L PPC with 2. 0 mg/L chlorine could further improve the quality of treated water, as indicated by residual turbidity, TOC and algae. The enhanced efficiency could be explained by the synergistic effect of the preoxidants themselves, or the effect of chlorine and the intermediate such as hydrous manganese dioxide, which was generated by potassium permanga- nate, the main ingredient of PPC.

关键词： potassium permanganate composites (PPC) chlorine combined preoxidation preozonation enhanced coagulation

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