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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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The characteristic changes of betung bamboo (Dendrocalamus asper) pretreated by fungal pretreatment Widya Fatriasari; Wasrin Syafii; Nyoman J Wistara; Khaswar Syamsu; Bambang Prasetya
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.133-143

Abstract

The fungal pretreatment effect on chemical structural and morphological changes of Betung Bamboo was evaluated based on its biomass components after being cultivated by white rot fungi, Trametes versicolor. Betung bamboo powder (15 g) was exposed to liquid inoculum of white rot fungi and incubated at 270C for 15, 30 and 45 days. The treated samples were then characterized by FT-IR spectroscopy, X-Ray diffraction and SEM-EDS analyses. Cultivation for 30 days with 5 and 10% loadings retained greater selectivity compared to that of the other treatments. FTIR spectra demonstrated that the fungus affected the decreasing of functional group quantities without changing the functional groups. The decrease in intensity at wave number of 1246 cm-1 (guaiacyl of lignin) was greater than that at wave number of 1328 cm-1 (deformation combination of syringyl and xylan) after fungal treatment. X-ray analysis showed the pretreated samples had a higher crystallinity than the untreated ones which might be due to the cleavage of amorphous fractions of cellulose. The pretreated samples have more fragile than the untreated ones confirmed by SEM. Crystalline allomorph calculated by XRD analysis showed that fungus pretreatment for 30 days has transformed triclinic structure of cellulose to monoclinic structure.
KAJIAN STRUKTUR ARANG-PIROLISIS, ARANG-HIDRO DAN KARBON AKTIF DARI KAYU Acacia mangium Willd. MENGGUNAKAN DIFRAKSI SINAR-X Saptadi Darmawan; Wasrin Syafii; Nyoman J Wistara; Akhirudin Maddu; Gustan Pari
Jurnal Penelitian Hasil Hutan Vol. 33 No. 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2015.33.2.81-92

Abstract

Activated carbon has been used widely for various applications. Hydro-char which is hydrothermally carbonized from biomass could be used as an alternative precursor for activated carbon manufacture, which is commonly obtained from pyrolized-char. This paper observes crystalline structure of Acacia mangium’s pyrolized-char and hydro-char using XRD (X-raydiffraction). The mangium wood was carbonized in 200°C and 300°C and depth analysis was conducted based on activated carbon product. Result shows carbon maturity index and aromaticity from both precursors (conventional and alternative) tends to increase after being activated; interlayer spacing (d002) is getting closer; meanwhile, crystallinity is greater; and the number, height as well as width of aromatic layers are increasing. Hydro-char exhibited crystallinity degree, maturity and aromaticity lower than those of the pyrolized-char obtained at 300°C carbonization, with the greater volatile content. Both types of char perform carbon structure with amorphous texture. The greatest iodine adsorption is achieved by hydro-char which was carbonized at 300°C. In general, XRD analysis on low temperature carbonization of pyrolized-char and hydro-char could predict the porosity of activated carbon.
Fiber Disruption of Betung Bamboo (Dendrocalamus asper) by Combined Fungal and Microwave Pretreatment Fatriasari, Widya; Syafii, Wasrin; Wistara, Nyoman; Syamsu, Khaswar; Prasetya, Bambang; Anita, S Heris; Risanto, Lucky
BIOTROPIA Vol. 22 No. 2 (2015): BIOTROPIA Vol. 22 No. 2 December 2015
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1200.375 KB) | DOI: 10.11598/btb.2015.22.2.363

Abstract

Combined microwave pretreatment is an effective method to modify carbohydrate and lignin structures of fungal and lignocellulosic materials, thereby improving the hydrolysis process for bioethanol conversion. This study aimed to evaluate the structural changes in carbohydrate and lignin components of betung bamboo following a combined biological–microwave pretreatment. Based on previous findings, a 30-day incubation using 5% and 10% (w/v) inoculum loading of the white-rot fungus Trametes versicolor—which showed the highest delignification selectivity—was selected as the fungal pretreatment. Microwave irradiation was then applied for 5, 10, and 12.5 minutes at 330 W. Characterization of structural changes was conducted using FTIR spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). FTIR analysis revealed that the combined pretreatment affected only the intensity of absorption bands without altering the functional groups. A decline in peak intensity occurred at 1,736 cm⁻¹ (C=O in xylan), 1,373 cm⁻¹ (C–H deformation in cellulose and hemicellulose), 1,165 cm⁻¹ (C–O–C vibration in cellulose and hemicellulose), and 895 cm⁻¹ (β-glycosidic linkage in cellulose). The pretreatment reduced hydrogen bonding in cellulose and weakened lignin–carbohydrate linkages associated with bamboo cellulose crystallinity. A slight increase in crystallinity index was observed due to cleavage of the amorphous fraction. SEM imaging confirmed the disruption of fiber structure, showing increasing degradation with longer microwave exposure durations.
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