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New technology for papermaking: commercializing biopulping

Tappi journal, 1998-11, Vol.81 (11), p.220-225

1999 INIST-CNRS ;ISSN: 0734-1415 ;CODEN: TAJODT

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Title:
New technology for papermaking: commercializing biopulping
Author: Scott, G.M. (SUNY-ESF, Syracuse, NY.) ; Akhtar, M ; Lentz, M.J ; Kirk, T.K ; Swaney, R
Subjects: Applied sciences ; ASTILLAS ; Atmospheric humidity ; BIODEGRADACION ; BIODEGRADATION ; Biological and medical sciences ; Biotechnology ; CERIPORIOPSIS SUBVERMISPORA ; Cost effectiveness ; Decontamination ; ELABORACION DE PULPA ; Environmental impact ; Exact sciences and technology ; FORCED VENTILATION ; Fundamental and applied biological sciences. Psychology ; Fungi ; Industrial applications and implications. Economical aspects ; Lignin ; LIGNINAS ; LIGNINE ; LIGNINOLYTIC MICROORGANISMS ; LIGNINS ; MECHANICAL METHODS ; METHODE MECANIQUE ; METODOS MECANICOS ; MICROBIAL DEGRADATION ; MICROORGANISME ; MICROORGANISMOS ; MICROORGANISMS ; Moisture ; Other applications ; Paper, paperboard, non wovens ; Papermaking ; PARTICULE DE BOIS ; PICEA ; Polymer industry, paints, wood ; PRETREATMENT ; Pulp manufacturing ; PULPING ; REDUCTION EN PATE ; Temperature ; VENTILACION ; VENTILATION ; Wood ; WOOD CHIPS ; Wood. Paper. Non wovens
Is Part Of: Tappi journal, 1998-11, Vol.81 (11), p.220-225
Description: Biopulping is defined as the treatment of wood chips with lignin-degrading fungi prior to pulping. Fungal pretreatment prior to mechanical pulping reduces electrical energy requirements during refining or increases mill throughput, improves paper strength, reduces the pitch content, reduces cooking time for sulfite pulping, and reduces the environmental impact of pulping. Our recent work involved scaling up the biopulping process toward the industrial level, investigating both the engineering and economic feasibility of the technology. We envision the process to be done in either a chip-pile or silo-based system for which several factors need to be considered: the degree of decontamination, a hospitable environment for the fungus, and the overall process economics. Currently, treatment of the chips with low-pressure steam is sufficient for decontamination. Furthermore, a simple, forced ventilation system can be used to maintain the proper temperature, humidity, and moisture content throughout the chip bed, thus promoting uniform growth of the fungus. The pilot-scale trial resulted in the successful treatment of 4 tons of wood chips (dry weight basis), with results comparable to those on a laboratory scale. For mechanical pulping, a 2-week treatment results in approximately 30% energy savings, which, considering the additional equipment and operating costs, results in an overall savings of US$ 10-20 per ton of pulp in a chip-pile system. Larger, 40-ton trials were also successful, with energy savings and paper properties comparable with the laboratory scale.
Publisher: Norcross, GA: TAPPI
Language: English
Identifier: ISSN: 0734-1415
CODEN: TAJODT
Source: Open Access: Freely Accessible Journals by multiple vendors

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New technology for papermaking: commercializing biopulping

1999 INIST-CNRS ;ISSN: 0734-1415 ;CODEN: TAJODT

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