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  • Writer's pictureMagneli Materials

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:

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