Removal of residual ozone in drinking water treatment using hydrogen peroxide and sodium thiosulfate

과산화수소와 티오황산나트륨을 이용한 정수처리공정에서의 잔류오존 제거

Kwon, Minhwan;Kim, Seohee;Ahn, Yongtae;Jung, Youmi;Joe, Woo-Hyun;Lee, Kyunghyuk;Kang, Joon-Wun

  • Received : 2015.06.03
  • Accepted : 2015.08.12
  • Published : 2015.08.15


The aim of this study was to evaluate the chemical quenching system for residual ozone and to determine the operating condition for the quenching system. Hydrogen peroxide ($H_2O_2$) and sodium thiosulfate ($Na_2S_2O_3$) were investigated as quenching reagents for ozone removal, and the tendency of each chemical was notably different. In the case of $H_2O_2$, the degradation rate of ozone was increased as the concentration of $H_2O_2$ increase, and temperature and pH value have a significant effect on the degradation rate of ozone. On the other hand, the degradation rate of ozone was not affected by the concentration of $Na_2S_2O_3$, temperature and pH value, due to the high reactivity between the ${S_2O_3}^{2-}$ and ozone. This study evaluates the decomposition mechanism of ozone by $H_2O_2$ and $Na_2S_2O_3$ with consideration for the water quality and reaction time. Furthermore, the removal test for the quenching reagents, which can be remained after reaction with ozone, was conducted by GAC process.


Hydrogen peroxide;Ozone process;Quenching;Residual ozone;Sodium thiosulfate


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Grant : 고도정수 처리시의 잔류오존 제거방안 연구

Supported by : 상수도공동연구협의회(7개 특.광역시 상수도사업본부, 제주특별자치도 수자원본부, K-water, 한국상하수도협회)