Pulp quality of oil palm empty bunches produced by bio-chemical mechanical processes
2002
Pasaribu, R.A. (Pusat Penelitian Hasil Hutan dan Sosial Ekonomi Kehutanan, Bogor (Indonesia))) | Goenadi, D.H. | Irawadi, T.
A study had been conducted to evaluate the characterictics of empty bunches of oil palm (EFBOP) and its suitability to biological pretreatment in pulping process. The study included: (a) characterization of EFBOP's fibres, (b) selection of most effective natural white-rot fungal isolates, and (c) optimization of conditions for newsprint pulp processing technique. Six isolates., i.e. Phanerochaete chrysosporium, Coriolus versicolor, Pleurocybella porrigens, PSM01, KTJ02, and CPS01 were first tested qualitatively in producing lignin-degrading enzymes on wood agar plate. Most potential isolate in degrading lignin was selected and used for further experiments. A 7.5 kg of 2.5 cm chopped EFBOP was inoculated with selected isolated incubated for 0, 10, 20, and 30 days at ambient conditions. After sundrying, the EFBOP samples were cooked using a mixture of 1 percent NaOH at 4, 6, and 8 percent (v/w) concentrations and anthraquinone 0.1 percent (v/w). The pulps produced were then bleached with 4 percent peroxides and 1.6 percent chlordioxides and analyzed for their physical and chemical properties. The results indicated that the fibres of EFBOP were classified as short fibre with Runkel number less than 1 and grouped as Class III according to be the Indonesian National Standard. The CPS01 showed high capabilities in degrading lignolytic compounds without any significant effect on cellulose content. Pretreatment by CPS01 isolate incubated for 10 days and processed by 8 percent of 1 percent NaOH - anthraquinone resulted in pulp yield of 48 percent, alkali consumption of 4.8 percent, kappa number of 46, burst factor of 42 Nmg, tear index of 6,5 Nmg, printing capacity of 97 percent, and brightness of 32' GE
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