A5067960476- Biofuel production and bioconversion
- Advanced Cellulose Research Studies
- Biodiesel Production and Applications
- Enzyme Catalysis and Immobilization
- Petroleum Processing and Analysis
- Microbial Metabolic Engineering and Bioproduction
- Heat transfer and supercritical fluids
- Subcritical and Supercritical Water Processes
- Food composition and properties
- Cassava research and cyanide
- Catalysis for Biomass Conversion
- Advanced Combustion Engine Technologies
- Geological and Geophysical Studies
- Lignin and Wood Chemistry
- Geochemistry and Elemental Analysis
- IoT-based Smart Home Systems
- Enzyme Production and Characterization
- Enzyme-mediated dye degradation
- Polysaccharides and Plant Cell Walls
- Chemical Thermodynamics and Molecular Structure
- Pineapple and bromelain studies
- Educational Methods and Outcomes
- Water and Wastewater Treatment
- Electromagnetic wave absorption materials
- Electrohydrodynamics and Fluid Dynamics
Sam Ratulangi University
2011-2025
Sepuluh Nopember Institute of Technology
2014-2021
Bandung Institute of Technology
2002
Abstract This work aimed to produce HHO gas through water electrolysis, investigating the effect of varying electric current from 10 A 100 as well changing quantity catalyst. The apparatus was set up in an acrylic container, with nine pairs electrode plates, each area 30 cm × , separated by a diaphragm. container filled 25 L electrolyte, and connected power supply that allowed voltage be adjusted. initial experiment involved producing using pure without catalyst, adjusting required....
The pretreatment of a high lignin substrate, coconut coir dust, was studied by chemical techniques (NaOH solution, ionic liquid, and NaOH followed liquid) physical method (subcritical water, SCW). Following substrate washing step, structural analyses were performed scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy. It found that all substrates pretreated methods had more amorphous structures than the untreated substrate. XRD patterns chemically...
This paper presents an approach for hydrolyzing cellulose nanocrystals from oil palm empty fruit bunch (OPEFB) presented through hydrochloric acid hydrolysis under sonication–hydrothermal conditions. Differences in concentration, reaction time, and acid-to-cellulose ratio affect toward the yield, crystallinity, microstructure, thermal stability were obtained. The highest yield of up to 74.82%, crystallinity 78.59%, a maximum degradation temperature (Tmax) 339.82 °C achieved using 3 M HCl at...
This study aims to produce reducing sugar hydrolyzed from substrate, coconut coir dust pretreated by recycled ionic liquid and its combination with alkaline. The 1H NMR FTIR were performed ver-ify the synthesized methylmethylimidazolium dimethyl phosphate ([mmim][dmp]). structure of substrates was analyzed XRD measurement. used recy-cled twice re-employ for substrate pretreatment. treated- untreated-coconut into sugars using pure cellulase. reaction, which called an enzymatic hydrolysis,...
Abstract This study aims at preparing and characterizing of bioplastics that utilized cassava biomass which was available abundantly in Indonesia. The bioplastic synthesis conducted with two variations the reactant, namely + starch glycerol water acetic acid (vinegar) ethanol. Bioplastic obtained characterized by employing scanning electron microscopic (SEM), X-Ray diffraction (XRD), Fourier transform infra-red (FTIR), thermogravimetric analysis (TGA), differential calorimetric (DSC)....
Sugarcane bagasse is one of lignocellulose materials that can be converted to biofuel. This work was aimed develop new pretreatment combination methods process sugarcane into biofuel (bio-hydrogen). Pretreatment using NaOH solution in with ionic liquid [DMIM]DMP enhanced the enzymatic hydrolysis significantly. After pretreat-ment, content cellulose and hemicellulose increased by 29.31% compared untreated one. Cellulose hemicelluloses were used as raw produce reducing sugars, con-verted...
Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one challenges for fermentable production. In this study, performance subcritical water (SCW) and enzymatic hydrolysis coconut husk toward reducing production was investigated using a severity factor (SF) approach. Furthermore, optimal condition SCW optimized response surface methodology (RSM), where composition changes lignocellulose yield as responses. From results, at low SF...
Penelitian ini bertujuan untuk membuat dan mengkarakterisasi bioplastik yang memanfaatkan biomassa singkong. Pembuatan dilakukan dengan dua variasi campuran yaitu pati singkong sebagai bahan dasar, gliserol + air plasticizer, asam asetat (cuka) katalis kedua kombinasi sama penambahan alkohol pembanding. Karakterisasi meliputi pengamatan permukaan menggunakan SEM; kristalinitas XRD; penentuan gugus fungsi FTIR; serta menganalisis sifat termal TGA DSC. Hasil karakterisasi menunjukkan bahwa...
This work was to analyze the effect of alkaline concentration on coconut coir husk crystallinity and sugar liberated enzymatically. The data showed that employing lignocellulose transformed crystallinity. XRD peaks increased highly which indicated cellulose more opened exposed. After pretreatment, chemical compositions (cellulose, hemicellulose, lignin) were changed significantly. 1% alkaline, cellulosic content inclined if compared non-pretreatment. When added 4%, decreased slightly a part...
The ionicliquid [MMIM][DMP] was synthesized from the reactants methyl imidazole [MIM] and trimethylphosphate [TMP] verified using 1HNMR FTIR. Coconut coir dust pretreated with a 1% alkaline solution.Its crystalline structure increased significantly due to dissolution of lignin hemicelluloses under conditions, exposing cellulose. After NaOH IL were employed, XRD showed that peak (002) decreased (101) almost vanished. This significant decrease in crystallinity related alteration substrate...
To enhance the hydrolysis to produce fermentable sugar, oil palm empty fruit bunch (OPEFB) has undergone ultrasonication pretreatment prior subjection subcritical water hydrolysis. This work aims optimize effect of temperature, reaction time, and concentration sodium dodecyl sulfate (SDS) as surfactant, with primary aim maximizing sugar production in process applied (OPEFB). The conditions were optimized using response surface methodology central composite design (RSM–CCD). experimental...
The cassava has been modified successfully by using the saline water, which was abundantly available on planet. biomass submerged in waters that salt concentrations were altered at 0, 3.5 percent (seawater) and 10 (w/w) kept 5 days. After recovery washing steps, treated solids characterized XRD (X-ray diffraction ), FTIR (Fourier transform infra-red), SEM (Scanning electron microscopic). results showed pattern of water pretreatment decreased significantly. biggest decrease X-ray intensity...
Objective of this work is to study the effects a saline solution used pretreat lignocellulosic material derived from champak timber. The native solids, in powder form, were mixed with water solutions three different concentrations and maintained for 2 weeks without stirring. treated solids washed, recovered, then dried under sunlight. substrates characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM). crystallinity...
Kayu cempaka (Elmerrillia ovalis) adalah salah satu jenis tanaman kayu yang dipakai dalam pembuatan rumah adat/rumah panggung dan paling banyak dijumpai di Sulawesi Utara. Industri ini menghasilkan limbah dari proses pengergajian. memiliki komponen kimia utama yaitu selulosa, hemi-selulosa lignin mana dua pertama dapat dikonversi menjadi gula etanol. Modifikasi struktur lignoselulosa dengan melakukan perlakuan/pretreatment lewat pemanasan gelombang mikro (microwave) supaya bahan...
The structures, crystallinities, Miller indices, and particle sizes of cassava treated with microwave radiation or saline water were analysed compared. Cassava was milled to 100 120 mesh then dried under solar for several days. first set substrates by at 300 W 10, 20, 30 min 1000 8 min. second immersed in 5 days salt concentrations 3.43% 10% (w/w). characterised x-ray diffraction, Fourier transform infra-red spectroscopy, scanning electron microscopy, the results compared characteristics...
Abstract A more sustainable energy source is needed to fulfill the increasing demand for energy. In Indonesia, biomass waste utilization as biofuel shows high potential. Coconut husk a comprised of cellulose and hemicellulose that can converted reducing sugar through enzymatic hydrolysis be further into biofuel. However, expensive, enzyme soluble cannot separated after use. Immobilization technique where an trapped onto insoluble inert support material so recovered reused. Chitosan magnetic...
STUDY OF BIO-ETHANOL PREPARATION FROM ARENGA PALM SUGAR Hanny F. Sangian1), Seni Tongkukut1) 1) Deptartment of Physics, University Sam Ratulangi Manado 95115 ABSTRACT This study purposes to prepare bio ethanol by using two column reflux distillation. In North Sulawesi has been known a very potential crop for yielding ethanol, is palm crop. Palm crops more productive than cane in sugar and fuel per hectare. Its productivity about 4-8 times compared cane, its rendement 14%, while only 7%....
Abstract This study aimed to investigate the effect of surfactant Tween 80 in enzymatic hydrolysis coconut husks by using immobilized cellulase from Aspergillus niger , Trichoderma reesei and xylanase. Surfactant is common enhance yield sugar process. However, its application enzymes has not been well investigated. Coconut husk an abundant resource cellulose that can be converted reducing which utilized produce various products such as biofuel, lactic acid, 5-hydroxymethyl furfural,...
Many countries worldwide encounter the greatest difficulties in improving people's life quality since fossil fuel reserves are decreasing, causing prices to rise drastically. This problem has made many countries, including Indonesia, struggle import them from producers Middle East. Adding a small part of ethanol gasoline is one solutions that been investigated and developed. The previous works relating blended fuels, ethanol, generally employed absolute alcohol, which was expensive. A...
To enhance the hydrolysis to produce fermentable sugar, OPEFB has undergone ultrasonication pretreatment. This work aims optimize effect of temperature, reaction time, and SDS concentration on sugar production in subcritical water hydrolysis. The pretreatment conditions were optimized using a central composite design. experimental design includes three factors levels, with range 180-220 oC temperature (X1), 60-80 minutes process time (X2), 1-5% w/w (X3), reducing (g/L) as responese (Y1)....