The Kraft Pulp And Paper Properties of Sweet Sorghum Bagasse (Sorghum bicolor L Moench)

Authors

  • Widya Fatriasari Research Center for Biomaterials LIPI Jl. Raya Bogor KM 46, Cibinong, Bogor 16911
  • Supriyanto Supriyanto The Southeast Asian Regional Centre for Tropical Biology (SEAMEO BIOTROP), Jl. Raya Tajur Km 6, PO Box 116, Bogor 16134,
  • Apri Heri Iswanto Forestry Department, Forestry Faculty, North Sumatera University, Jl. Prof. A. Sofyan No.3 Kampus USU, Medan 20155

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2015.47.2.4

Abstract

This study investigated the potency of sweet sorghum (Sorghum bicolor) bagasse as raw material for pulp and paper using kraft pulping. The effects of alkali and sulfidity loading on kraft pulp and paper properties were also investigated. The pulping condition of the kraft pulp consisted of three levels of alkali loading (17, 19 and 22%) and sulfidity loading (20, 22 and 24%). The maximum cooking temperature was 170C for 4 h with a liquid to wood ratio of 10:1. Kraft pulping of this Numbu bagasse produced good pulp indicated by high screen yield and delignification selectivity with a low Kappa number (< 10). The unbleached pulp sheet produced a superior brightness level and a high burst index. The increase of active alkali loading tended to produce a negative effect on the pulp yield, Kappa number and paper sheet properties. Therefore, it is suggested to use a lower active alkaline concentration.

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Published

2015-05-31

How to Cite

Fatriasari, W., Supriyanto, S., & Iswanto, A. H. (2015). The Kraft Pulp And Paper Properties of Sweet Sorghum Bagasse (Sorghum bicolor L Moench). Journal of Engineering and Technological Sciences, 47(2), 149-159. https://doi.org/10.5614/j.eng.technol.sci.2015.47.2.4

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