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 Posted: Wed 22:48, 06 Apr 2011 Post subject: Pulp and paper industry in the biotechnology and b |
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Pulp and paper industry in the bio-technology and bio-bleaching
Expanding the role of manganese peroxidase Lai Ye kraft pulp, obtained very good results. 1995 also reported the use of some dependence on manganese peroxidase purified bleaching treatment, to make unbleached kraft pulp brightness increased about 15% (Chen Jiaxiang, l998). 3.3.3 Biological bleaching of laccase in 1883, Yoshida in oriental furniture, paint found on a protein can catalyze the paint curing process. This protein was named in 1894 by the Bertrand laccase. 1987-1992, Call and other published several articles on the use of laccase for bleaching of pulp patent coverage. In 1992, Bourbo / anais and Paice reported bleached kraft pulp with laccase found in the presence of mediator ABTS obviously off pulp and delignification methoxy cable effect. Call and Mucke 1994 reported a laccase - mediator system that can successfully handle a variety of pulp types, including hardwood, softwood, or annuals of kraft pulp, sulfite pulp slurry and solvent, pulp brightness is greatly increased. In 1996, BourbonnaJs and Paice ABTS with laccase system for a pulp concentration of 10% sulfate and sulfite pulp handling, processing, then by alkali extraction, pulp kappa number decreased by 25% -40% and 5o% also proved that laccase - Mediator technology is a great potential for development of bio-bleaching process (Wang Pingdeng, 2000). 4 Conclusion pulp and paper biotechnology research early in the sixties and the seventies had begun. However, due to lack of basic research and other reasons, for a long time failed to reach a breakthrough. The late eighties, early nineties,[link widoczny dla zalogowanych], industry demand has greatly pushed the pace of biotechnology research. In the pulp and paper industry in application of biotechnology to improve the pulp yield and lower consumption of fiber raw materials, eliminating pollution 23 dye, saving energy has great potential. Biotechnology is the application-oriented multi-disciplinary and cross-disciplinary. The development of modern pulp and paper industry and the emergence of a series of f can be problems, it is the micro-organisms and biotechnology in particular projects are becoming increasingly closer over the past decade, people of Biotechnology in Pulp and Paper Industry was a lot of research, the research involved almost all aspects of pulp and paper industry. In these studies, some still in the laboratory research stage, while others were intermediate or plant-scale trials, and some have gained large-scale production of modern applications. There is no doubt, with the implementation of the strategy of sustainable development and environmental ecology higher requirements, the application of biotechnology for the pulp and paper industry will play a significant role in promoting development.
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