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Ozonation process and water disinfection
Author(s) -
Nghi Nguyen Hoang,
Cuong Le Cao,
Dieu Tran Vinh,
Ngu Tu,
Oanh Doan Thi Yen
Publication year - 2018
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201800076
Subject(s) - reduction potential , redox , ozone , oxidizing agent , chemistry , environmental chemistry , disinfectant , aqueous solution , water treatment , environmental engineering , inorganic chemistry , environmental science , organic chemistry
As commonly known, ozone is a highly effective disinfectant for both aqueous and gaseous media. It works through oxidation. Dissolved ozone causes the increases of the redox potential ORP of water. During the ozonenation process, the time‐dependent redox potential ORP of water depends strongly on the density of microbes in it. By analyzing the time‐dependent redox potential, it is possible to measure and calculate the parameters such as the oxidizing rate, the maximal redox potential ORP max etc. of the ozonated water. These parameters of water reflect the microbiological pollution level of water. Ozonated water having a certain ORP level obtains disinfecting ability. Bacteriological analysis of the water samples after ozonation show that total coliform and E. coli bacteria were fully removed after a few minutes at ORP of 800 mV.