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<< JRScience Home     Volume 14 No.1   June  2003     << Back to Volume Home

EFFECTS OF LOW VOLTAGE ELECTROLYSIS AND FREEZING ON COLIFORM CONTENT OF CONTAMINATED WATER

 Javed I. Qazi and Faiza Saleem

Microbiology Laboratory, Department of Zoology, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Pakistan.

Email: qazi@scientist.com

Abstract: A sewage sample was mixed with drinking water and subjected to low voltage (15V) electrolysis in the presence of 1% NaCl. The prepared sample was also kept in freezer with and without the presence of sodium chloride for 4-hours. Among these treatments the electrolysis proved to kill the coliforms, while the freezing reduced the bacterial content. Antibiotics sensitivity patterns revealed that certain of the coliform strains survived the freezing and thawing shocks. Nature of such surviving bacteria and need to study chemical parameters of electrolyzed water are discussed.

 

Keywords: Antibiotic susceptibility of coliforms, coliforms and electric current,  electrolysis and water treatment, freezing and water treatment, NaCl and coliforms.