Anita, Sita H
Jurnal Ilmu dan Teknologi Kayu Tropis

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Kraft and Soda Pulping of White Rot Pretreated Betung Bamboo Fatriasari, Widya; Ermawar, Riksfardini A; Falah, Faizatul; Yanto, Dede HY; Adi, Deddy TN; Anita, Sita H; Hermiati, Euis
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

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Abstract

This research was conducted to study the effects of pre-treatment with white-rot fungi on pulp properties of betung bamboo. Inoculum stocks of white-rot fungi (25 ml) were injected into polybags contained barkless fresh bamboo chips. Each polybag contained 214.9–286.8 g oven dry weight of chips. Bamboo chips in the polybags were inoculated by Pleurotus ostreatus and Trametes versicolor. Both of them were then incubated for 30 and 45 days at room temperature. Bamboo chips were cooked using soda and Kraft processes. The cooked bamboo chips were then defiberize using disc refiner for 3 times. Pulp yield, kappa number and degree of freeness of the pulp were then analyzed. The treatment of two white rot fungi, gave different effects on the characteristic of betung bamboo pulp. The effects of fungi treatment on kappa number and degree of freeness can be seen only at samples cooked using kraft process. Incubation time did not affect pulp yield of bamboo treated with both fungi, but it affected kappa number and degree of freeness of bamboo pulp cooked using kraft process. Bamboo treated with T. versicolor incubated for 45 days and cooked using kraft process produced the best pulp quality with high pulp yield.Key words: betung bamboo, biopulping, degree of freeness, kappa number, pulp yield.
The Pretreatment Effect of Single Culture White Rot Fungi on the Anatomical Structure of Betung Bamboo Fatriasari, Widya; Damayanti, Ratih; Anita, Sita H
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

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Abstract

This study was to investigate the changes of morphological, macroscopic and microscopic characteristic on betung bamboo fiber during single culture of white rot fungi pretreatment. Fresh, and bark less 2 years old betung bamboo (Dendrocalamus asper) chips, 1.6 cm in length were inoculated by 10% of white-rot fungi inoculums stock for 30 and 45 days in room temperature. This study used three kinds of fungi i.e Trametes versicolor, Pleurotus ostreatus and Phanerochaete chrysosporium. After the incubation period was finished the chips were separated by maceration process (Schutze method) to analyze the fiber dimension and its derived value. The fibers were then observed the macroscopic and microscopic structure by optical microscope. The pretreatment caused the decreasing of fiber length, cell wall thicknesses, while the lumen and fiber diameter were since in versa. The improvement on fiber derived value except muhlsteph ratio was found in this study. Bamboo pretreated by T. versicolor for 30 days showed the best fiber dimension and fiber derived value and the treated bamboos were predicted to produce pulp with superior grade quality (grade I).Key words: bamboo structure, betung bamboo, fiber dimension, white rot fungi