ABSTRACT

The current study investigated the Ethiopian sugarcane bagasse during its delignification using the Kraft pulping process and bleaching by single stage hydrogen peroxide process. The multilevel categoric experimental design was used to appraise the effects of the independent process variables (temperature, NaOH concentration, and time) on the pulp yield and kappa number during the Kraft pulping process. The central composite experimental design of response surface methodology was used to appraise the effects of independent bleaching variables (bleaching temperature, H₂O₂ concentration, and time) on the pulp yield, brightness, and whiteness during the bleaching process. The optimal pulp yield was 38.41% with 17.68 kappa number. The bleached pulp yield for the pulp with kappa number of 17.68 and the pulp with kappa number of 8.41 were 84.12% and 83.91%, respectively. The brightness and whiteness for the pulp with kappa number of 17.68 were 61.92% and 85.36%, respectively. Similarly, for the pulp with a kappa number of 8.41, the brightness and whiteness were 68.35% and 91.43%, respectively. Paper from the pulp with kappa number of 17.68 has higher tensile, burst, and tear strength. The study shows the promising utilization of the Ethiopian sugarcane bagasse for paper production via the Kraft delignification and single stage hydrogen peroxide bleaching.

摘要

目前的研究调查了埃塞俄比亚甘蔗渣在使用牛皮纸制浆工艺和单级过氧化氢工艺漂白期间脱木质素的过程。多级分类实验设计用于评估独立过程变量（温度、NaOH 浓度和时间）对牛皮纸制浆过程中纸浆产量和卡伯值的影响。响应面法的中心复合实验设计用于评估独立漂白变量（漂白温度，H ₂ O ₂浓度和时间）对漂白过程中纸浆产量、亮度和白度的影响。最佳纸浆产率为 38.41%，卡伯值为 17.68。卡伯值为17.68的纸浆和卡伯值为8.41的纸浆的漂白纸浆得率分别为84.12%和83.91%。卡伯值为17.68的纸浆的亮度和白度分别为61.92%和85.36%。同样，对于卡伯值为 8.41 的纸浆，亮度和白度分别为 68.35% 和 91.43%。由卡伯值为 17.68 的纸浆制成的纸具有更高的拉伸、破裂和撕裂强度。该研究表明，通过牛皮纸脱木素和单级过氧化氢漂白，埃塞俄比亚甘蔗渣在造纸中的应用前景广阔。