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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 Penelitian Hasil Hutan Jurnal Sylva Lestari Makara Journal of Technology Jurnal Ilmu Kehutanan International Journal of Renewable Energy Development
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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DIAPERS DARI FLUFF KENAF Haroen, Wawan kartiwa; R.P, Posma; Wistara, Nyoman
Jurnal Riset Industri Vol 3, No 3 (2009): Peningkatan Nilai Tambah melalui Inovasi Kemasan
Publisher : Badan Penelitian dan Pengembangan Industri

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Abstract

Fluf pulp mutu tingi dapat dibuat dari serat dari kenafm, yang dipisahkan dari sel parenchyma dan bahan-bahan lain secara proses mekanis. Gabungan serat terurai dengan 2-3 m perlu dipotong –potong menjadi 3-5 cm sebelum pemburuan. Penelitian ini bubur fluff disiapkan dengan mengunakan proses soda dengan parameter-parameter berikut : 12%, 14% dan 16% alkali aktif; perbandingan liquor terhadap padatan 1:4 suhu maksimum 165 oc, dan waktu hingga suhu maksimum dan waktu pada suhu maksimum adalah masing-masing 1.5 dan 2 jam. Unsur khlor bebasyang dibleaching dengan urutan OD0ED1D2  dilakukan untuk membleach pulp dihasilkan. Fluffing dilakukan dalam willeymil atau shreeder dengan atau tampa perlakuan super absorbent polymer (SAP). Perlakuan dengan SAP divariasikan dari 10 - 30 %. Hasil diperoleh menunjukan yield dan bilangan kappa masingmasing dalam rentang 6183-65.10% dan 10-14. Sifat-sifat lain sepertikeceraha, kandungan terkstrasi, viskositas dan knos berturut-turut lebih tingi daripada 89% GE,0.01%, 4.76 cP, dan 5%. Kapasitas dari kenaf dalam percobaan berada dalam rentang 7.03-18.76g/g. hal ini bergantung pada alkali aktif, konsentrasi SAP dan metode fluffing. Seluruh sifat-sifatyang diuji memenuhi persaratan diaper komersial. Perlakuan dengan SAP meningkatkan kapasitas absorben dari bubur fluff secara nyata.
KAJIAN STRUKTUR ARANG-PIROLISIS, ARANG-HIDRO DAN KARBON AKTIF DARI KAYU Acacia mangium Willd. MENGGUNAKAN DIFRAKSI SINAR-X Darmawan, Saptadi; Syafii, Wasrin; Wistara, Nyoman J; Maddu, Akhirudin; Pari, Gustan
Jurnal Penelitian Hasil Hutan Vol 33, No 2 (2015): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Litbang Keteknikan Kehutanan dan Pengolahan Hasil Hutan

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Abstract

Pengaruh Durasi Steam terhadap Kualitas Arang Aktif Limbah Sagu (The Effect of Steam Duration on Quality and Characteristics of Activated Charcoal of Sago Waste) Siruru, Herman; Syafii, Wasrin; Wistara, Nyoman J; Pari, Gustan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

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Abstract

Sago waste is a potential biomass that can be used as active charcoal raw material. The objectives of this research were to know the effect of steam duration on quality and characteristics of activated charcoal of sago waste. Carbonization process was carried out at 400 ⁰C for four hours, then activation was carried out at 100 ml bar steam pressure, at a temperature of 800 ⁰C with variations of steam duration 60, 80 and 100 minutes and activation without steam, only heating for 60 minutes. The proximate test used the SNI standard, observed the functional group using Fourier Transform Infrared Spectrophotometer (FTIR) and observed the active charcoal structure using X-ray diffraction (XRD). The results showed that the yield, moisture content, volatile, ash content, fixed carbon, iodine absorption of activated charcoal of sago bark and sago soft core were, respectively, 39.22–84.10%, 4.63–6.39%, 3.03–5.06%, 7.74–33.43%, 61.54–88.63%, 158.60–972.60 mg g-1. XRD analyzes showed that the degree of crystalline activated charcoal of sago bark waste with the highest steam time of 100 minutes (35.98%) compared with the degree of crystalline other activated charcoal is only about 20.57-7.30%. FTIR spectroscopy results from activated charcoal of sago waste also identified nitrogen compounds such as NO2 at wave numbers 1370-1390 cm-1; 1530-1560 cm-1; 1620-1660 cm-1 and phosphorus compounds such as P-S at 200-500 cm-1 wave number; P=S at the wave number 500-850 cm-1.Keywords: carbonization, active charcoal, sago, steam
Peningkatan Sifat Papan Partikel Sengon dengan Perlakuan Perendaman Air Dingin (Improvement the Propoerties of Particleboard Made from Sengon with Cold Water Immersion Treatment) Marwanto, Marwanto; Maulana, Sena; Maulana, Mohammad I; Wistara, Nyoman J; Nikmatin, Siti; Febrianto, Fauzi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 16, No 2 (2018): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Jurnal Ilmu dan Teknologi Kayu Tropis

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Abstract

The objectives of this research is to evaluate the physical and mechanical properties of particle board made from sengon and mangium woods treated with cold water immersion. Particles of sengon and mangium immersed in cold water for 24 hours. The particles of sengon and mangium are combined with a ratio of 100: 0; 0: 100; 75:25; and 50:50. Particle boards are made in size (30x30x0,9) cm3 with target densities of 0.7 g cm-3. The particle board was binded with methylene diphenyl diisocyanate (MDI) adhesive at 10% content and hot press at 140 °C with 25 kgf cm-2 for 7 minutes. The physical and mechanical properties of particle board are evaluated according to JIS A 5908-2003 standard. The physical and mechanical properties of particle board were much affected by particle combination and cold water immersion treatment. The physical (i.e density, moisture content, water absorption (WA), and thickness swelling (TS)) and mechanical properties (ie. modulus of elasticity (MOE), modulus of rupture (MOR), and internal bonding (IB)) were evaluated. The results showed that cold water immersion improved dimensional stability (WA and TS) of particle board obtained. However, some mechanical properties decreased.Keyword: cold water immersion, mangium, particleboard, sengon
PERFORMANCE OF MICROWAVE PRETREATMENT ON ENZYMATIC AND MICROWAVE HYDROLYSIS OF BETUNG BAMBOO (Dendrocalamus asper) Fatriasari, Widya; Syafii, Wasrin; Wistara, Nyoman; Syamsu, Khaswar; Prasetya, Bambang
Teknologi Indonesia Vol 37, No 3 (2014)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v37i3.232

Abstract

In this present study, we focused on how the changes in the best microwave pretreatment affected the performance of enzymatic and microwave hydrolysis of pretreated bamboo. This solid fraction was subjected to enzymatic hydrolysis following NRE L protocol and microwave acid-hydrolysis with/without presence of activated carbon (0.5 g/g) at 1% and 5% of sulfuric acid concentration for 512.5 m at 330 watt. Short duration microwave-acid hydrolysis of microwave pretreated bamboo showed better reducing sugar yield than that of enzymatic one. Microwave heating for 12.5 inm at 330 W hydrolyzed with 1% acid using microwave irradiation demonstrated a high reducing sugar yield (25.81% of dry biomass or 27.12% of dry substrate). In this treatment, 37.92% of hollocellulose can be converted into reducing sugar or equivalent to 36.12% of maximum potential sugar released. This yield was increased 6.09 times compared to the highest reducing sugar yield coming from enzymatic hydrolysis using 20 FPU/g of cellulase enzymes. Reducing sugar yield obtained with 5% microwave acid hydrolysis of microwave pretreatment for 5 m at 770 W was equal to the result of hydrolysis for 12.5 m at 330 W. Unfortunately, the activated carbon as solid catalyst in microwave hydrolysis could only reduce brown compound without reducing sugar yield improvement.
The characteristic changes of betung bamboo (Dendrocalamus asper) pretreated by fungal pretreatment Fatriasari, Widya; Syafii, Wasrin; J Wistara, Nyoman; Syamsu, Khaswar; Prasetya, Bambang
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.
Model Persamaan Massa Karbon Akar Pohon dan Root-Shoot Ratio Massa Karbon Elias; Nyoman Jaya Wistara; Miranti Dewi; Hania Purwitasari
Jurnal Manajemen Hutan Tropika Vol. 16 No. 3 (2010)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The case study was conducted in the area of Acacia mangium plantation at BKPH Parung Panjang, KPH Bogor. The objective of the study was to formulate equation models of tree root carbon mass and root to shoot carbon mass ratio of the plantation. It was found that carbon content in the parts of tree biomass (stems, branches, twigs, leaves, and roots) was different, in which the highest and the lowest carbon content was in the main stem of the tree and in the leaves, respectively. The main stem and leaves of tree accounted for 70% of tree biomass. The root-shoot ratio of root biomass to tree biomass above the ground and the root-shoot ratio of root biomass to main stem biomass was 0.1443 and 0.25771, respectively, in which 75% of tree carbon mass was in the main stem and roots of tree. It was also found that the root-shoot ratio of root carbon mass to tree carbon mass above the ground and the root-shoot ratio of root carbon mass to tree main stem carbon mass was 0.1442 and 0.2034, respectively. All allometric equation models of tree root carbon mass of A. mangium have a high goodness-of-fit as indicated by its high adjusted R2.
Metode Estimasi Massa Karbon Pohon Jeunjing (Paraserianthes falcataria L Nielsen) di Hutan Rakyat (Method for Estimation of Tree Carbon Mass of Paraserianthes falcataria L Nielsen in Community Forest) Elias .; I Nyoman Jaya Wistara
Jurnal Manajemen Hutan Tropika Vol. 15 No. 2 (2009)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The study was conducted at Jalagajaya Village, Jasinga Subdistrict, Bogor District, West Java, Indonesia. The objective of the study was to apply a methodology and method for tree carbon mass stock estimation in community forest based on a field survey of the forest and a model of tree carbon mass equation. The study revealed that there was a difference on carbon content in the parts of the tree biomass. Based on the analysis, model of tree carbon mass equation of Paraserianthes falcataria L Nielsen at Julagajaya Village was C = 0.7D1.48, with R² adj. = 95.7%. Results of the tree carbon mass estimation of the Paraserianthes falcataria L Nielsen based on the tree carbon mass-equation model were lower than the results estimated based on the tree biomass-equation model of Brown (1997), but higher than the results estimated based on the tree biomass-equation model of Ketterings et al. (2001). The study showed that the tree carbon stock of the community forest Paraserianthes falcataria L Nielsen at Julagajaya Village in 1,2,3,4,5, and 6 year age stand were 29.262, 33.555, 36.041, 39.163, 33.163, and 56.943 ton ha-1, respectively.Keywords: biomass-equation model, tree carbon mass-equation model, tree carbon stock, communityforest
RAYON FILAMENT PROPERTIES FROM FIVE LESSER KNOWN TROPICAL WOODS SPECIES Wawan Kartiwa Haroen dan Nyoman Wistara
Jurnal Teknologi Industri Pertanian Vol. 18 No. 2 (2008): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

ABSTRACTFive lesser known hardwood species from recently opened settlement area in Kalimantan and Sumatra islands of Indonesia were collected and identified as Symplocos sp., Pterygota sp., Schima sp., Nyssa sp., and Gymnotroches sp. The present experiments were intended to evaluate the potential of these species for dissolving pulp and rayon production. Prehydrolized kraft process was applied to pulp the woods and an ECF bleaching method with DEDED sequences were chosen to purify the resulting pulp. All dissolving pulp and rayon filament properties were compared to Indonesian Industrial Standard SNI 14-0938-1989 for regular rayon filament and high wet modulus (HWM) rayon filament properties. It has been found that these woods can be classified as class II for raw material of pulp making with medium to long fiber, medium wood density and acceptable bulk density of chips. Gymnotroches sp. was the most difficult to delignify, as indicated by the highest kappa number of 18.8. Except for pulp brightness, all parameters tested indicated that these species are highly potential for dissolving pulp and regular rayon production. Some parameters were even indicating that these woods can be used for HWM rayon fiber.Keywords: prehydrolysis, tropical hardwood, dissolving pulp, regular rayon, HWM rayon.
HIDROLISIS ENZIMATIS DAN MICROWAVE BAMBU BETUNG (Dendrocalamus asper (Schult.f.)) SETELAH KOMBINASI PERLAKUAN PENDAHULUAN SECARA BIOLOGIS DAN MICROWAVE Widya Fatriasari, Wasrin Syafii, Nyoman Wistara, Khaswar Syamsu, Bambang Prasetya
Jurnal Teknologi Industri Pertanian Vol. 25 No. 2 (2015): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Enzymatic and acid microwave-assisted hydrolysis of a newly combined biological and microwavepretreatment was developed to evaluate the reducing sugar yield of betung bamboo fibers. In previous parallelstudy of single (biological or microwave) pretreatment, the improvement of reducing sugar yield of microwaveassistedacid hydrolysis has been reported previously. The cellulase of 10 and 20 FPU/g substrate was appliedin the enzymatic hydrolysis of pretreated biomass using a shaking incubator at 50°C and 150 rpm for 48 hours.In the microwave-assisted acid hydrolysis, 1.0% sulfuric acid concentration was used either with or without theactivated carbon aditionat microwave hydrolysisat 330 watt for 7.5-12.5 minutes. There was an improvement inreducing sugar yield of bamboo pretreated biological-microwave pretreatment after microwave assisted-acidhydrolysis compared to enzymatic hydrolysis. This hydrolysis performance improvement was greater than that ofthe single pretreatment (biological or microwave pretreatment). Bamboo pretreated by biological-microwavepretreatment (5% inoculum loading and irradiated for 5 minutes at 330 W) showed the highest reducing sugaryield after microwave hydrolysis for 12.5 minutes (16.65% per dry biomass or 18.92% per dry substrate). Asmuch as 27.21% of hollocellulose can be converted to reducing sugar or 23.84% of theoritical maximumreducing sugar yield. The benefical effect of activated carbon addition in microwave assisted acid hydrolysiswas the reduction of brown compound even though oligomer adsorption caused the decreasing of reducing sugaryield.Keywords: betung bamboo, brown compound, combination of biological and microwave pretreatment, enzymaticand acid-microwave hydrolysis, reducing sugar yield
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 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 Khaswar Syamsu L N Sutardi Lina Karlinasari Lucky Risanto Luthfi Hakim 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 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 Wasrin Syafii dan Kurnia Sofyan Gustan Pari Buchari Wawan kartiwa Haroen Wawan kartiwa Haroen, Wawan kartiwa Widya FATRIASARI Widya Fatriasari Widya Fatriasari Wulan Starini Yuhana Rahayu Yusup AMIN