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Decolorization of oxygen-delignified bleaching effluent and biobleaching of oxygen-delignified kraft pulp by non-white-rot fungus Geotrichum candidum Dec 1
Authors:Noboru Shintani  Makoto Shoda
Institution:1. Advanced Science Research Laboratory, Saitama Institute of Technology, 1690 Fusaiji, Fukaya-city, Saitama 3690293, Japan;2. Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 2268503, Japan;1. Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China;2. Research Center of Surface and Interface Chemistry and Engineering Technology, Nanjing University, Nanjing 210093, PR China;3. Nanjing Institute of Supervision and Testing on Product Quality, Nanjing 210028, PR China;1. Çanakkale Onsekiz Mart University, Faculty of Science and Arts, Department of Chemistry, Çanakkale, Turkey;2. Ondokuz May?s University, Faculty of Science and Arts, Department of Physics, Samsun, Turkey;3. Çanakkale Onsekiz Mart University, Faculty of Science and Arts, Department of Biology, Çanakkale, Turkey;1. Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary;2. Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary;1. Department of Agro-Industrial, Food, and Environment Technology, Faculty of Applied Science, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;2. The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut''s University of Technology Thonburi, Bangkok, 10140, Thailand;3. The Biosensor and Bioelectronics Technology Centre, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;4. The Research and Technology Center for Renewable Products and Energy, King Mongkut''s University of Technology North Bangkok, 10800, Thailand;1. Biomedical Engineering Department, University of Alberta, Edmonton, Alberta, Canada;2. Electrical and Computer Engineering Department, University of Alberta, Edmonton, Alberta, Canada;3. IntelligentNano Inc., Edmonton, Alberta, Canada;4. Department of Laboratory Medicine and Pathology, University of Alberta, Canada;5. Alberta Innovates Technology Futures, Vegreville, Alberta, Canada;1. University of Turin, Department of Agricultural, Forest and Food Sciences, Largo Paolo Braccini 2, 10095 Grugliasco (TO), Italy;2. University of Natural Resources and Life Sciences, Vienna (BOKU), Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln), Konrad-Lorenz-Str. 20, Tulln 3430, Austria
Abstract:Decolorization of oxygen-delignified bleaching effluent (abbreviated as OBE) and biobleaching of oxygen-delignified kraft pulp (OKP) were conducted using a non-white rot fungus Geotrichum candidum Dec 1 (abbreviated as Dec 1) which has ability to decolorize various synthetic dyes and molasses. Dec 1 decolorized up to 77% of OBE for 6 days. In addition, Dec 1 increased the brightness of OKP from 47.8% to 51.2% and decreased the kappa value of OKP from 12.4 to 10.4 points during a 6-day incubation period at a 25% of pulp-concentration. At 2% pulp-concentration, the brightness of OKP increased by 13% and the kappa value of OKP decreased by 4 points only for a 3-day incubation period. When the decolorized OBE was used for bleaching of OKP, the brightness of OKP increased to 62.7% under the shaking culture to a 2% pulp-concentration using culture fluid of decolorized OBE. It was revealed that Dec 1 is a potential to apply for decolorization of wastewater and biobleaching of pulp in paper-mills.
Keywords:decolorization  oxygen-delignified bleachning effluent  biobleaching  oxygen-delignified kraft pulp
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