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3. Research institutions looking for technology transfer to enterprises and for partners for joint research venture

P5: Oligodynamic water disinfection method, R. Khaydarov

Title:

M.S.

First Name:

Renat

Family Name:

Khaydarov

Position:

senior scientist

Name of organization:

Institute of Nuclear Physics

Address:

Ulugbek

Postcode:

702132

City:

Tashkent

Country:

Uzbekistan

Telephone:

998-712-606144

Fax:

998-712-642590

E-mail:

physicist@sarkor.uz

Website:

www.greentech.agava.ru

Proposed Title

Oligodynamic water disinfection method.

Abstract

Proposed method can be used for preventing bacterial contamination in potable water supply and water storage systems, for disinfecting cooling water in building ventilation systems and humidification systems. Our investigation examined an oligodynamic water disinfection method employing metal ions (Ag+, Cu2+, Au) generated by an electrolytic process. The efficacy of using different silver/copper/gold combinations (within the limits of current drinking water regulations) for killing E. coli, Legionella pneumophila, Salmonella, and other pathogens was examined. The study investigated the dependence of bacteria killing time against metal ion concentration, different initial bacteria concentrations (from 103 to 1012 CFU/L), and the influence of different ion (Cl-, SO42-, S2-, Fe2+, Fe3+)) concentrations on the disinfection process. The best disinfection is obtained by oligodynamic method using an alloy of silver/copper/gold composition with concentrations of metals in the ratio 70 to 90 percent/10 to 30 percent/0.1 to 0.2 percent, respectively. On the base of these microbiological investigations it was constructed: 1) devices for disinfection of drinking water for individual (portable and household stationary) and collective use (stationary); They are currently utilized by some Food Companies of Uzbekistan, Russia and South Korea; 2) devices for disinfection of water in household air humidifiers; 3)equipment for prevention of flowering and growing algae in swimming-pools, fountains, etc; 4) experimental equipment for disinfection of cooling water in building ventilation systems and humidification systems; 4) devices for alternative water supply in distant small settlements (using ordinary or solar batteries as an energy source) designed as a nozzle for manual water pumps and local artesian water supply systems. Several hundreds of these disinfection devices with capacity of 1 m3/h were installed in Aral Sea region. Energy consumption of intended drinking water disinfection equipment with a production capacity of 50 cubic meters of water per hour does not exceed 40 W-h. The destruction time for bacteria does not exceed 60 minutes at a bacterial concentration 1000 CFU/L. Disinfecting efficiency of these devices was tested in several certified independent labs and universities of USA, Korea, Russia, Malaysia during the period of 1998 through 2003. We have considered this water disinfection method to be a commercially viable technology to market and we are looking for partners from industry. Preliminary test results for destroying spores of Bacillus Subtilis and Bacillus Megatherium in water have demonstrated synergetic effect of using Ultraviolet Light and electrolytically generated metal ions with simultaneous treatment by the electrostatic field. We are looking for partners for joint research venture to carry out materials and microbiological testing the discovered synergetic effect for various vegetative bacteria and acceptable non-toxic simulant spores in water.

A. Enterprises Corner

Enterprises looking for complementary partners in research arena and

x

Researchers offer their findings for technology transfer to enterprises

B. Research Corner

x

Research institutions looking for partners for joint research venture

x

Potentially interested for continuation of projects preparations on Tuesday afternoon 1 st July

Keywords:

water, disinfection, bacteria, air, oligodynamic

Received: 28/05/2003

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