Successful production of bagasse newsprint now a realty-vital concepts which made it possible
1995
Atchison, J.E. (Joseph E. Atchison Consultants, New York (USA))
After 130 years of efforts, strewn with failures, successful production of bagasse newsprint, of a quality, which is fully acceptable to the publishers, is now a reality. As a result of the cautions approach pursued by serious and competent investigations, over the past 25 years, combined with their realization of the vital elements required for success in this field, the basic technology has been perfected and large newsprint mills are now operating in India, Indonesia and Mexico, in which a high percentage of bagasse pulps are being used. The four vital concepts which have proved to be essential and which have been adopted by these mills are: 1. The necessity to use a high content of mechanical pulp in the furnish, all or part of which can be produced from bagasse. 2. The necessity to have highly efficient moist and wet depithing systems. 3. The necessity to utilize a good wet storage system which assures anaerobic conditions in the pile to prevent excess deterioration of color and brightness of the bagasse, since the brightness of the depithed bagasse controls the final brightness of the pulp. 4. The necessity to use a bleaching system which maximizes the increase in brightness, with little or no damage to the bagasse mechanical pulp properties.
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