Water and water purification technologies

Scientific and technical news

TREATING MICROBIOLOGICAL FLUIDS WITH METAL FILTERS, CHARACTERIZED BY VARIABLE SIGN AND MAGNITUDE CHARGE OF SURFACE

V. A. Shablovski1, A. V. Tuchkovskaya1, V.N. Belyakov2, S.L. Vasilyuk2

1 – Research Institute for Physical-Chemical Problems of the Belarusian State University, Minsk, Belarus

2 – Vernadsky Institute of general and inorganic chemistry NAS Ukraine, Kiev, Ukraine

e-mail: shablovski@bsu.by

In the paper, to study the effect of structural and electrochemical parameters of metal-ceramic filters based on titanium as the objects were selected cultures of bacteria Escherichia coli and Bacillus subtilis, and yeast cells Saccaharomyces cereviciae.

It was found that the electrofiltration process proceeds at small values of potential difference on the porous metal-ceramic membrane and the counter electrode (-1.5 V). When the potential difference <1.8 V – takes place electrofiltration process with intensive sedimentation of bacterial cells to filter, when a potential difference >1.8 V begins the electrolysis of water, accompanied by anode deposition of atomic oxygen and thereby sterilized aqueous colloid-disperse solution of microorganisms.

We had found that Gram-positive bacteria are filtered better than Gram-negative. All microorganisms are separated from the liquid well, but living cells keep better than dead, mobile keep better than immobile, rodlike bacterium – better than spherical.

Key words: microbiological fluids, metal-ceramic filters, electrofiltration, Escherichia coli, Bacillus subtilis, Saccaharomyces cereviciae.

Download (PDF)

, , , , ,
21.08.2011 at 7:55 pm