Journal of Engineering and Technological Sciences
Vol 47, No 2 (2015)

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

Fatriasari, Widya ( 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,)
Iswanto, Apri Heri ( Forestry Department, Forestry Faculty, North Sumatera University, Jl. Prof. A. Sofyan No.3 Kampus USU, Medan 20155)



Article Info

Publish Date
31 May 2015

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 170°C 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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Journal Info

Abbrev

JETS

Publisher

Subject

Engineering

Description

Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental ...