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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Teknologi Industri Pertanian Jurnal Ilmu dan Teknologi Hasil Hutan Reaktor International Journal of Renewable Energy Development BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Penelitian Hasil Hutan Jurnal Riset Industri Jurnal Ilmu dan Teknologi Kayu Tropis Teknologi Indonesia Jurnal Sylva Lestari Makara Journal of Technology Jurnal Ilmu Kehutanan International Journal of Renewable Energy Development Jurnal Penelitian Hasil Hutan
I Nyoman Jaya Wistara
Department Of Forest Products, Faculty Of Forestry And Environment, IPB University
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 Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Veterinary

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Journal : Makara Journal of Technology

 1 
Medium Density Fibreboard Made of Acetylated Sludge from Paper Mill Hakim, Luthfi; Herawati, Evalina; Wistara, I Nyoman Jaya
Makara Journal of Technology Vol. 15, No. 2
Publisher : UI Scholars Hub

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Medium Density Fibreboard Made of Acetylated Sludge from Paper Mill. Research of using sludge as raw material for making medium density fibreboard (MDF) was useful to create additional value of sludge. The objective of the research was to evaluate physical properties, mechanical properties, and durability of MDF from acetylated sludge in 4 levels of acetate anhydride (0%, 3%, 5%, and 7%) with 3 replicates. The MDF was made using dry process. After materials were mixed with adhesives, they were pressed using hotpress under 170 oC temperature and 45 Pa pressure for 25 minutes. The size of the MDF sample was 25 cm x 20 cm x 1 cm with 0.8 g/cm3 density. The physical properties (density, moisture content, water absorption, thickness swelling) and mechanical properties (modulus of elasticity, modulus of rupture, internal bond, screw holding power) was tested based on JIS A 5905-2003 standard. The durability was evaluated using SNI 01-7207-2006. All physical properties of MDF fulfill JIS A 5905-2003. Acetate anhydride decreased the moisture content value of MDF. On the other hand, all mechanical properties did not fulfill the standard. That was caused by calcium carbonate in sludge that blocked the adhesion between sludge fibres. The durability of MDF tested here was classified Class I which is very resistant to termites.
Digestibility of Betung Bamboo Fiber Following Fungal Pretreatment Fatriasari, Widya; Syafii, Wasrin; Wistara, Nyoman J.; Syamsu, Khaswar; Prasetya, Bambang
Makara Journal of Technology Vol. 18, No. 2
Publisher : UI Scholars Hub

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This research evaluated the effect of fungal pretreatment of betung bamboo fibers and enzymatic- and microwaveassisted hydrolysis on the reducing sugar yield. The enzymatic hydrolysis of the pretreated biomass was carried out with cellulase and 10 and 20 FPU/g of substrate in a shaking incubator at 50 °C and 150 rpm for 48 h. The sulfuric acid concentration used in the microwave-assisted acid hydrolysis was 1.0, 2.5, and 5%, either with or without the addition of activated carbon. Microwave irradiation (330 Watt) was applied for 5–12.5 min. The yield of reducing sugar was better with the microwave-assisted acid hydrolysis, and the yield tended to increase with an increase in the irradiation time. Based on the dry weight of the initial biomass (bamboo), pretreatment with 5% inoculum loading resulted in a higher reducing sugar yield (17.06%) than with 10% inoculum loading (14.54%). At a 1% acid concentration, the formation of brown compounds decreased, followed by a reduction in the reducing sugar yield. The addition of activated carbon at a 1% acid concentration seemed to be of no benefit with respect to the yield in the microwaveassisted acid hydrolysis. The pretreatment with the 5% inoculum loading for 12.5 min at 1% acid concentration resulted in the highest reducing sugar yield. Under these conditions, the yield was 6.3-fold that of the reducing sugar yield using 20 FPU/g of cellulase. The rate of bamboo hollocellulose hydrolysis reached 22.75% of the maximum theoretical reducing sugar reducing sugar of dry biomass.
Co-Authors Abi K Arif Adesna Fatrawana Adesna Fatrawana Akhirudin Maddu Akhirudin Maddu Anak Agung Istri Sri Wiadnyani Arif Wijayanto Aris Purwanto Bambang Prasetya Bambang Prasetya Bambang Prasetya Byantara D Purusatama D R Agungpriyono Deded Sarip Nawawi Devi Nurmala Dewi R Agungpriyono Dian A Indrawan Dwi A Purnamasari Elias Elias . Evalina Herawati Evelin Yustiana Fauzi Febrianto Gokma Silaban Gustan Pari Gustan Pari Gustan Pari Gustan Pari Gustan Pari Hania Purwitasari Hanif N HIDAYAH Hari Wijayanto Herman Siruru Herman Siruru Hikma Yanti Hotman Effendi IETJE WIENTARSIH Ihak Sumardi Ihak Sumardi Istie Rahayu Itje Wintarsih Iwan Risnasari Khaswar Syamsu L N Sutardi Lina Karlinasari Lucky Risanto Luthfi Hakim Martua YS Nababan Marwanto Marwanto Marwanto Marwanto Marwanto Marwanto, Marwanto Maulana, Mohammad I Maulana, Sena Merry Sabed Min Lee Miranti Dewi Muhammad Iqbal Maulana Muhammad QA Damanik Nopen Meisaroh Philippe Gérardin Posma R.P . Posma R.P, Posma Purnawati, Renny Rahmi N Hidayah Rita K Sari Rita Kartika Sari S Heris Anita, S Heris Saptadi DARMAWAN Saptadi Darmawan Se-Hwi Park Sehwi Park Siruru, Herman Siti Nikmatin Subangkit, Mawar Sucahyo Sadiyo Sudirman Sudirman Totok K Waluyo Vera Junita Sitanggang Vetnizah Juniantito Wasrin Syafii Wawan kartiwa Haroen Wawan kartiwa Haroen, Wawan kartiwa Widya FATRIASARI Widya Fatriasari Wulan Starini Yuhana Rahayu Yusup AMIN