Reports on Ozone Bleaching in Vietnam’s Pulp and Paper Industry

Miyanishi Takanori

doi:10.2524/jtappij.73.447

One of the smaller Asian countries that has done well in recent years is Vietnam. Indeed, the country’s paper and paperboard consumption are showing relatively stable increases of over 15％ per annum. Since Vietnam is quite dependent on imports at the moment, it will have to invest in to ensure that it has the quality and quantity of domestic paper production required to stop the market from being taken over by overseas producers as its markets develop.Among the other challenges currently facing Vietnam’s pulp and paper industry, the treatment of colored effluent discharged from pulp mills and the shift from conventional bleaching to Elementary Chlorine Free（ECF）bleaching are drawing attention. Ozone has a powerful oxidation potential to react with any type of lignin compounds and can thoroughly replace chlorine gas in bleaching pulps to high brightness. Effluent is non–toxic, colorless and does not cause any environment problems. Approximately 50％ of new ozone bleaching equipment installed during the year of 2000–2013 in the world is successfully operated by Japanese paper companies.Upon the request of Vietnam Pulp and Paper Association（VPPA），I was invited to give a lecture at Hanoi in Vietnam and share my experiences in ozone bleaching with scientists and engineers of pulp and paper companies, university students and lecturers. The technical seminar was fruitful, and many questions were raised from the audience. The following day, we visited An Hoa Pulp and Paper Factory. It is a new paper mill committed to producing and supplying high quality pulp and paper products including calcium carbonate coated paper, printing and writing paper, and photocopy paper.

Reports on Ozone Bleaching in Vietnam’s Pulp and Paper Industry

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