Hydrothermal Treatment of Shrub Willow Followed by Sulfate Pulping and Bleaching
K. Dölle *
Department of Paper and Bioprocess Engineering (PBE), College of Environmental Science and Forestry (ESF), State University of New York (SUNY), Syracuse, New York, 13210, USA
C. Schomann
Department of Paper and Bioprocess Engineering (PBE), College of Environmental Science and Forestry (ESF), State University of New York (SUNY), Syracuse, New York, 13210, USA
*Author to whom correspondence should be addressed.
Abstract
The laboratory study examines the suitability of shrub willow for paper making applications. The shrub willow was harvested, debarked, chopped, sorted and hydrothermal pretreated before sulfate pulping. After pulping a four stage bleaching process followed. The results show that shrub willow can be utilized as a sustainable hardwood source for papermaking applications with acceptable whiteness values.
Keywords: Bleaching, sulfate pulp, hydrothermal treatment, short rotation woody crops, willow