PULPING SODA PANAS TERBUKA BAMBU BETUNG DENGAN PRAPERLAKUAN FUNGI PELAPUK PUTIH (PLEUROTUS OSTREATUS DAN TRAMETES VERSICOLOR)
ABSTRACT: 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
Penulis: Widya FATRIASARI,
Riksfardini Annisa ERMAWAR, Faizatul FALAH, Dede Heri Yuli YANTO, Euis HERMIATI
Kode Jurnal: jpkehutanandd090053
