Studies on the Development of OA-Paper Renewal Process Using Bisphenol A-Degrading Bacteria

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Application of a bisphenol A(BPA)-degrading bacterial strain to regenerate thermographic papers was proposed. BPA contained in such troublesome papers make strongly-colored compounds in the renewal processes by the reaction with redox dyes which are also contrained in the papers, and thereby spoils the renewal of papers. If we can utilize BPA-degrading bacteria for removing BPA.above-mentioned problem may be overcome. An isolated bacterial strain Pseudomonas paucimobilis FJ-4 could completely and efficiently degrade BPA via its cleavage at the propane-part. Production of the catabolic enzymes was highly inducible and the optimal pH and temperature of FJ-4 for BPA degradation were 7.0-7.2 and ca.30ﾟC,respectively. FJ-4 showed the capability of degrading BPA contained in a thermographic paper pulp, which consequently lead to the decolorization of the colored matter made from a redox dye catalyzed by BPA.The decolorization was not affected at all by the presence of chemicals such as CaCO_3, NaOH,AL_2(SO_4)_3 which are used in existing paper renewal processes. These results suggested that renewal processes of renewal of themographic paper using BPA-degrading bacteria is possible.