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

• Published in: Transactions of Tianjin University Vol. 20; no. 3; pp. 189 - 196
• Main Author: 张怡然 王启山 王宏超 靳冲 李多 鲁金凤
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01.06.2014; Springer Nature B.V; College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
• Subjects: Ammonia; Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Optimization; Science; Water utilities; Waterworks; 原水; 接触时间; 控制; 正交实验; 氨氮浓度; 消毒副产物; 溴化物; 预臭氧化; HAAs; preozonation; THMs; orthogonal experiment; bromate; orthogonal; experiment
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-014-2266-y

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 ofbromate were in order ofpH 〉 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.