| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1987: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1986: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Research Abstract |
Water disinfection is important in the protcetion of public health. The most popular process is the treatment with chlorine and other related chemicals, but the formation of trihalomethanes and other carcinogens is a serious defect in this procedure. These organohalogen compounds are reported to undergo biocondensation, which results in a serious pollution of the environment. A recent report from this labolatory has demonstrated that insoluble pyridinium-type resin strongly captures many bacterial cells on the surface by contact with them. The purpose of this research project is to develop a new, reliable, and effective process for termoval of microorganisms from water based on the insoluble pyridinium-type resin, which does not produce any toxic chemical substances and does not exert pollution upon the environment. The capturing ability of the resin increased with the content of the pyridinium group in the resin, as well as hydrophilicity and high degree of swellin in water of the res
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in matrix. Hydrophobic bacteria and hydrophilic bacteria showed distinct difference in the capturing interaction between the resin and bacterial cells. With hydrophobic bacteria, electrostatic interaction and hydrophobic interaction between the resin and cells appeared to be important. with Hydrophilic bacteria, other factors such as solvent (water) mediated forces and hydrodynamic forces were suggested. On the other hand, the corresponding linear polymer, i.e., soluble pyridinium-type polymer was found exhibit antibacterial activity. In addition, the soluble pyridinium-type polymer was. found to be an excellent polymeric coagulant for the suspension of microbial cells. These phenomena appeared to be related with the strong ability of the pyridinium-type resin to capture microbial cells. Based on these experimental observations, the insoluble pyridinium-type resin was demonstrated to be an excellent material for removal of microorganisms from waster without production of toxic chemicals such as trihalomethanes, and with31t environmental pollution. Less
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