Drinking Water Disinfection With Electrolysis
Updated: Aug 30, 2019
"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 pro-
cess. A comparison of flow and circulating (3 times) regimes for electro-
lysis 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."
An excerpt of a research paper published in the Latvian Journal of Chemistry in May 2013. DOI: 10.2478/v10161-012-0016-9
The authors are: Madars Reimanis, Linda Mezule, Jurijs Ozolins, T. Juhna and Juris Malers.
You can read the full article here: