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Enhancement of Coagulation and Flocculation Efficiencies by Ultrasonic Chemical Spray Nozzle I  

Kim, Jin-Kook (Division of Environmental, Civil, and Transportation Engineering, Ajou University)
Cho, Soon-Haing (Division of Environmental, Civil, and Transportation Engineering, Ajou University)
Ha, Dong-Yun (Division of Environmental, Civil, and Transportation Engineering, Ajou University)
Koh, Jae-Seok (Department of Materials Science and Engineering, Ajou University)
Kim, Yong-Hyun (Department of Materials Science and Engineering, Ajou University)
Choi, Seung-Chul (Department of Materials Science and Engineering, Ajou University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.1, 2005 , pp. 52-58 More about this Journal
Abstract
To establish low-cost and high efficiency water treatment process, feasibility of applying ultrasonic spray nozzle for chemical injection was evaluated. Ultrasonic spray nozzle was manufactured using piezoelectric ceramics. Treatment efficiencies of contaminants by ultrasonic spray nozzle were compared with conventional chemical mixing such as back-mixing. It was found out that the rate of chemical diffusion rate by ultrasonic spray nozzle was faster than by back-mixing method. Removal efficiencies of various contaminants, such as turbidity, organics and microorganism by ultrasonic spray nozzle were also higher than by back-mixing method. By adapting ultrasonic spray nozzle in coagulant injection process, it can be prevented that the decline of treatment efficiency by coagulant overdose. The amount of coagulant can be reduced by applying ultrasonic spray nozzle in water treatment. Along with these advantages chemical mixing chamber is not required if ultrasonic spray nozzle is adapted. From these results, it can be concluded that chemical injection by ultrasonic spray nozzle is an economical and highly efficient device for coagulant mixing.
Keywords
Ultrasonic Chemical Spray Nozzle; Coagulation; Mixing Method; Treatment Efficiencies;
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