HERMIATI, Euis, Indonesia

  • Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 2 No. 2 (2009): Jurnal Ilmu Teknologi Hasil Hutan - Articles

    This research was conducted to study the effects of pretreatment with white-rot fungi on pulp properties of betung bamboo. Inoculum stocks of white-rot fungi (25 ml) were injected into polybag contained barkless fresh bamboo chips of 1.6 cm in width. Each polybag contained 221.21-230.43 g oven dry weight of chips. Bamboo chips in the polybags were inoculated by P. ostreatus and T. versicolor. Both of them were then incubated for 30 and 45 days in an incubator. Bamboo chips were cooked in open hot soda process. The cooked bamboo chips were then fibrillated using beater hollander and stone refiner. Yield, kappa numbers (TAPPI 236 cm-85) and freeness (CSF) of the pulp were then analyzed. Pulp yield pretreated with P.ostreatus and incubated for 30 days was the highest (increased by control 22.31%), while that pretreated with T.versicolor was the lowest (decreased by control 22.20%). The increasing of incubation time had positive correlation with the reduction of kappa number. Statistic test (ANOVA) at 95% level of confidence show that fungi give significant effect on kappa number, freeness, and kappa number degradation. Besides that fungi, the interaction between fungi and incubation times give significant effect on the yield changes and pulp yield. T. versicolor had better activity in 45 days of incubation. Pulp freeness resulted              from this study were still lower than the desired value. Pretreatment of betung bamboo using T. versicolor with               45 days of incubation was considered better than the other treatments.

     

    Keywords : Betung bamboo, biopulping, pulp yield, kappa number, degree of freeness


    Abstract  PDF
  • Jurnal Ilmu dan Teknologi Hasil Hutan Vol. 1 No. 2 (2008): Jurnal Ilmu Teknologi Hasil Hutan - Articles

    Six species of bamboos, that were andong bamboo (Gigantochloa verticillata), tali bamboo (Gigantochloa apus), hitam bamboo (Gigantochloa nigrocillata), ampel bamboo (Bambusa vulgaris), betung bamboo (Dendrocalamus asper), and kuning bamboo (Bambusa vulgaris), were analyzed for their fiber morphological as well as their physical-chemical properties. Results of these analysis would be used as a matter of consideration in choosing species of bamboos to be used as raw material for pulp and paper. Fiber morphological analyses include determination of fiber dimensions and followed by calculation of derivation of fiber dimensions.  Determination of fiber dimensions includes fiber length, fiber diameter, lumen diameter and cell wall thickness, while calculation of derivation fiber dimensions includes runkell ratio, felting power/slenderness), muhlsteph ratio, coefficient of rigidity and flexibility ratio. Physical analyses include moisture content and specific gravity, while chemical analyses include determination of extractive (ethanol-benzene), hot water solubles, cold water solubles, lignin, holocellulose, ash and silicate contents.  Results of this study showed that of the six species of bamboos studied, kuning bamboo had the most suitable properties as raw material for pulp and paper, followed by betung, tali, andong, hitam, and ampel bamboos.

     

    Keywords : Bamboo, fiber morphology, physical-chemical properties, pulp, paper


    Abstract  PDF