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Publikācija: Drinking Water Disinfection with Electrolysis

Publication Type Scientific article indexed in ERIH database, in INT1 or INT2 category journals
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Drinking Water Disinfection with Electrolysis
Field of research 2. Engineering and technology
Sub-field of research 2.4 Chemical engineering
Authors Madars Reimanis
Linda Mežule
Jurijs Ozoliņš
Juris Mālers
Tālis Juhna
Keywords electrolysis, disinfection, oxidants, chlorine, technological parameters
Abstract Nowadays electrochemical disinfection has gained an increasing attention as an alternative to conventional drinking water disinfection, since it is regarded as environmentally friendly, amendable to automation, inexpensive, easily operated and is known to inactivate a wide variety of microorganisms from bacteria to viruses and algae. We found that along with increasing the number of electrodes in our equipment from 2 to 24, the resistance of chlorine-generating electrolytic cell and specific work of electric current decreased. During the electrolysis the amount of generated Cl2 increased along with the increase of chloride ion concentration in the solution and the intensity of electric current. The technological process parameters (flow rate, current intensity) have been established to obtain a predetermined amount of generated chlorine during the electrolysis process. A comparison of flow and circulating (3 times) regimes for electrolysis of tap water with chloride ion concentration below 10 mg/L showed that circulation is necessary to generate active chlorine (above 1 mg/L). At the same time, when no circulation was performed, even a 0.9 A treatment was not enough to generate detectable levels of free chlorine. Electrochemical disinfection of tap water with non-stoichiometric titanium oxide electrodes was effective enough to inactivate both metabolically active and cultivable bacteria E. coli to undetectable levels within 15 minutes at 0.5 A current intensity.
DOI: 10.2478/v10161-012-0016-9
Reference Reimanis, M., Mežule, L., Ozoliņš, J., Mālers, J., Juhna, T. Drinking Water Disinfection with Electrolysis. Latvian Journal of Chemistry, 2012, Vol.51, Iss.4 , pp.296-304. ISSN 0868-8249. Available from: doi:10.2478/v10161-012-0016-9
ID 17366