1999 | OriginalPaper | Chapter
Biopulping: a Less Polluting Alternative to CTMP
Authors : Dr. Pratima Bajpai, Dr. Pramod K. Bajpai, Prof. Dr. Ryuichiro Kondo
Published in: Biotechnology for Environmental Protection in the Pulp and Paper Industry
Publisher: Springer Berlin Heidelberg
Included in: Professional Book Archive
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At present, pulp is produced from wood either by chemical delignification, mechanical separation of the fibers, or combinations of chemical and mechanical methods. Mechanical pulping methods are being used increasingly because they give much higher yields (>90%) than do chemical methods (40-50%) and require less capital investment. The main disadvantages of mechanical pulping are the high energy requirement, the low strength and the low brightness stability of mechanical pulps (Table 3.1). Addition of chemical pulp is often required to produce papers with adequate strength.