| 摘要 |
PURPOSE:To increase the amount of immobilized microorganisms per unit area of a carrier, shorten treating time and improve treatment efficiency, by carrying and immobilizing a microorganism on the surface of a ceramic carrier having surface electric potential of opposite polarity to that of the surface potential of the microorganism. CONSTITUTION:The surface potential of a microorganism and that of a ceramic carrier are premeasured. The surface potential of the microorganism is measured by suspending the microbial cells in, e.g. a test solution adjusted to pH3 and 0.3mS electric conductivity with HCl and KCl, injecting the suspension into Brigg's cell having electrodes mounted at both ends, measuring migration velocity of the microorganism under a microscope while passing a current across both electrodes and judging the positive or negative electric charge from the moving direction at the same time. The surface potential of the ceramic carrier is similarly measured by finely pulverizing the carrier. The microorganism is then carried and immobilized on the surface of the ceramic carrier having the surface potential of polarity opposite to that thereof.
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