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All Journal Reaktor International Journal of Renewable Energy Development Bioma : Berkala Ilmiah Biologi Indonesian Journal of Forestry Research Jurnal Penelitian Hasil Hutan ANNALES BOGORIENSES Teknologi Indonesia Makara Journal of Technology Indonesian Journal of Forestry Research Annales Bogorienses
Euis HERMIATI
R&D Unit for Biomaterials, Indonesian Institute of Sciences, Cibinong, Bogor 16911, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology

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Journal : Makara Journal of Technology

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Biological Pretreatment of Oil Palm Frond Fiber Using White-Rot Fungi for Enzymatic Saccharification Hermiati, Euis; Anita, Sita Heris; Risanto, Lucky; Styarini, Dyah; Sudiyani, Yanni; Hanafi, Achmad; Abimanyu, Haznan
Makara Journal of Technology Vol. 17, No. 1
Publisher : UI Scholars Hub

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Oil palm frond is one type of lignocellulosic biomass abundantly and daily available in Indonesia. It contains cellulose which can be converted to glucose, and further processed to produce different kinds of value –added products. The aim of this research is to study the effects of biological pretreatment of oil palm frond (OPF) fiber using Phanerochaete chrysosporium and Trametes versicolor on the enzymatic saccharification of the biomass. The OPF fiber (40-60 mesh sizes) was inoculated with cultures of the two fungi and incubated at 27 °C for 4 weeks. The samples were taken after 1, 2, 3, and 4 weeks of incubation. Chemical components of the biomass after pretreatment were analyzed. The saccharification of the pretreated samples using cellulase and β-glucosidase was performed in a water bath shaker at 50 °C for 48 hours. The concentration of reducing sugar increased with increasing of incubation time, either in those pretreated with culture of P. chrysosporium or with T. versicolor. Pretreatment of OPF fiber using single culture of T. versicolor for 4 weeks gave the highest reducing sugar yield (12.61% of dry biomass).
Properties of Lignin from Oil Palm Empty Fruit Bunch and Its Application for Plywood Adhesive Risanto, Lucky; Hermiati, Euis; Sudiyani, Yanni
Makara Journal of Technology Vol. 18, No. 2
Publisher : UI Scholars Hub

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Lignin from lignocellulosic biomass is a potential biopolymer for wood adhesive. The aims of this study were to characterize lignin isolated from the black liquor of oil palm empty fruit bunch fiber pretreated with steam explosion in alkaline conditions and to examine the bond quality of aqueous polymer isocyanate (API) adhesive prepared from lignin, natural rubber latex (NRL), and polyvinyl alcohol (PVA) as base polymers with isocyanate crosslinkers. Lignin was precipitated from the black liquor by adding hydrochloric acid; then the precipitate was separated by filtration, thoroughly washed with water up to pH 2 and pH 5, and dried. The isolated lignin was characterized by ultimate analysis, UV spectroscopy, FT-IR spectroscopy, and thermal analysis. Three-layer plywood samples were prepared, and the bond strengths of the plywood samples were determined in dry conditions and after cyclic boiling. The lignin isolates with different pH values did not have significantly different chemical and thermal properties. Both lignin isolates had similar C, H, and O contents, identical functional groups in the FTIR spectra, similar absorption in the UV spectra, and high decomposition temperatures. The base polymers composition that could produce API adhesive for exterior applications was NRL/PVA/lignin (4/4/2). The use of more lignin in the adhesive formulation decreased the bond strength of the plywood.
Co-Authors - Fitria Achmad Hanafi, Achmad Ahmad Hanafi Ahmad Thontowi Apri Heri Iswanto Atit Kanti Bambang Prasetya Danang Sudarwoko Adi Dede Heri Yuli YANTO Djumali Mangunwidjaja Dyah Styarini Endang Kusdiyantini Fahriya Puspita Sari Faizatul FALAH Fajriutami, Triyani Fajriutami, Triyani Faradila Ayu, Near Putri hamzah, fajar nur Haznan Abimanyu Ika WAHYUNI Ina Winarni, Ina Kholida, Lutfi Nia Laksana, Raden Permana Budi Laksana, Raden Permana Budi Lucky Risanto Muhammad Ghozali N Nurhayati Oktaviani, Maulida Ono Suparno Pratomo, Bagas Ikhasan Ramadhan, Kharisma Panji Riksfardini Annisa ERMAWAR Sita Anita, Sita Sita Heris Anita Siti Mardiana Sri Rulliaty Sri Rullyati Sunarti, Ttiti C Takashi Watanabe Titi C. Sunarti Wahyu DWIANTO Widya FATRIASARI Yanni Sudiyani Yosi Aristiawan