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J Korean Soc Environ Eng > Volume 38(6); 2016 > Article
J Korean Soc Environ Eng 2016;38(6): 329-333. doi: https://doi.org/10.4491/KSEE.2016.38.6.329
묽은 산 전기분해에 의한 복합 산화제 생성
강신영, 박종훈, 김상현
대구대학교 환경공학과
Composite Oxidizing Agents Generation Using Electrolysis of Dilute Hydrochloric Acid
Shin-Young Kang, Jong-Hun Park, Sang-Hyoun Kim
Department of Environmental Engineering, Daegu University
Corresponding author  Sang-Hyoun Kim ,Tel: 053-850-6691, Fax: 053-850-6699, Email: sanghkim1@daegu.ac.kr
Received: March 29, 2016;  Revised: April 19, 2016;  Accepted: April 27, 2016.  Published online: June 30, 2016.
ABSTRACT
Disinfection by electrolysis would be useful for small wastewater treatment plant, combined sewer overflow, ballast water, swimming pool, and fish farming, where the transport, storage, and the use of chlorine gas is limited. This study investigated the feasibility of the electrolysis of dilute hydrochloric acid (HCl) for disinfection. The effects of HCl concentration, voltage and reaction time on the generation of oxidizing agents, HOCl, O3, and H2O2, were examined in a series of batch test. The highest current efficiency was 99.3% which was found at 2.2%, 3 V, and 5 min of HCl concentration, voltage, and reaction time, respectively. Continuous electrolysis at 2.2% HCl, 3 V, and 5 min of the hydraulic retention time showed 97.4% of the current efficiency. Addition of sodium chloride up to 20 g/L linearly increased the oxidizing agents production. 92.2% of total coliforms were removed by the contact with the electrolyzed water.
Key Words: Electrolysis, Oxidizing Agent, Current Efficiency, Voltage, Dilute Hydrochloric Acid
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