cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
Jurnal Bahan Alam Terbarukan
Published by Universitas Negeri Semarang
ISSN : 23030623     EISSN : 24072370     DOI : -
Core Subject : Science,
Materials Science & Nanotechnology
This journal presents articles and information on research, development and applications in biomass conversion processes (thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion) and equipment to produce fuels, power, heat, and value-added chemicals from biomass. A biorefinery takes advantage of the various components in biomass and their intermediates therefore maximizing the value derived from the biomass feedstock. A biorefinery could, for example, produce one or several low-volume, but high-value, chemical or nutraceutical products and a low-value, but high-volume liquid transportation fuel such as biodiesel or bioethanol (see also alcohol fuel). The high-value products increase profitability, the high-volume fuel helps meet energy needs, and the power production helps to lower energy costs and reduce greenhouse gas emissions from traditional power plant facilities. Future biorefineries may play a major role in producing chemicals and materials that are traditionally produced from petroleum.
Arjuna Subject : -
Articles 426 Documents
 19   20   21   22   23 
Strategies for Lignin Pretreatment, Decomposition and Modification: A Review Tolesa, Leta Deressa; Lee, Ming-Jer
Jurnal Bahan Alam Terbarukan Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i1.23392

Abstract

The dependency of chemical industry on nonrenewable sources of energy such as petroleum based carbon feedstock is rising dramatically day to day. Nonetheless, global warming caused by greenhouse gas emissions threatens the environment balance and the climate stability. Accordingly, it is necessary to find a renewable resource to decrease the environmental concern, specifically gaseous emissions from fossil fuels and to provide the energy stock. Outstanding to the significance of lignocellulosic biomass as most remedy to the current environmental issues and substituent of nonrenewable source of energy, this review affords understandings about the role of lignin as polymer and raw material for large molecules. In this review article, types of lignin with their extraction methods, fractionation technology to valuable chemicals, modification of the macromolecules to other polymers with tunableproperties, and an extensive range of applications are discussed widely. The major valuable chemicals produced from lignin via chemical depolymerization are also summarized and illustrated with their molecular structures.
The Production of Liquid Fuel from Plastic Wastes by Using Waste Garbage Power Plant: Study on the Effect of Electric Load and Fuel/Gasoline to Solar Ratio Roni, Kiagus Ahmad; Mufrodi, Zahrul; Mustakim, Imam
Jurnal Bahan Alam Terbarukan Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i1.23231

Abstract

The type of plastic waste that is often a problem in many cities in Indonesia is Polyethylene Terephthalate (PET), his is due to the plastic waste plastic waste bags has no longer economic value. One of the goals of plastic waste processing is usng it as a raw material for the Waste Garbage Power Plant (PLTSa). The most profitable in handling plastic waste by converting plastic waste into fuel oil as an alternative energy source because plastic is basically derived from petroleum. Plastic also has a fairly high heating value equivalent to gasoline and diesel fuel. Some studies related to plastic processing have not been integrated from the production process to downstream products in the form of electric products to get the overall level of plant efficiency. Therefore a research of plastic waste power plants needs to be done at the prototype level to determine the performance of the fuel and the level of efficiency of the resulting assemblers. The Pyrolysis Reactor Prototype Unit can be used to convert plastic bottle waste into liquid fuel with a yield of 56.26% carried out at a process temperature of 170 oC and the resulting heating value reaches 19644 Btu/lb close to the heating value of Pertamina Gasoline. The generator system performance test for the liquid fuel mixture (BBC) with Gasoline and Diesel has an optimal mixture ratio in the BBC - Bensi / Solar mixture 3: 2 with an optimal load of 800 Watt. In the generator system performance test for liquid fuel mixture (BBC) with Gasoline/Diesel is more optimal for comparison of BBC fuel with Gasoline, because for the BBC mixture with Gasoline in all generator system comparison values occur ignition. Whereas BBC with Solar does not ignite at a ratio of 0: 5, 1: 4 and 2: 3.
Recovery of Minor Palm Oil Compounds Using Packed Bed Adsorption Column Bahrun, Mohd Hardyianto Vai; Bono, Awang; Dzilrazman, Nur Kamaliyah; Kamin, Zykamilia
Jurnal Bahan Alam Terbarukan Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i1.23461

Abstract

Carotene and tocopherol are valuable products that exist as minor compounds in palm oil and mostly extracted out during many stages of palm oil processing. Hence, most of it ended up in wastewater or palm oil mill effluent (POME). Fortunately, adsorption is potentially one of the most efficient method as compared to the others. In fact, it is widely studied in laboratory scale, in order to obtain equilibrium data for the steady state system. However, industrial practices are mostly operated in unsteady state in a continuous manner. Consequently, this study is executed to design a recovery process of one of the minor compounds in palm oil mill effluent (POME), which is carotene, using silica gel. It aims to predict the dynamic adsorption of recovery of minor compounds from palm oil mill effluent based on available equilibrium data, investigate the effects of dynamic and physical properties of the system towards the process by analyzing the breakthrough curve and study the feasibility of the scale up process by performing a sensitivity analysis on the system. Then, a base simulation was prepared by using available equilibrium data. Operating and design parameters such as, bed height, inlet flowrate and concentration were manipulated. Consistent with previous packed column studies, increase flow and concentration will reduce the time required for the column to achieve saturation, while increase bed height effects were vice versa. Finally, the last objective to achieve was to study the practicality of the packed bed column and perform a sensitivity on assumptions and predictions such as predicted mass transfer coefficient and isotherm model. It is proven that the selection of isotherm model and prediction in coefficient did not pose a large impact to the breakthrough curve and the average time required for the column of 1.5 m tall and 0.8 in diameter, to reach breakthrough time is 1.7 days. Hence, it can be concluded that adsorption technology using silica gel as its adsorbent can be applied is recovering minor compounds in palm oil mills.
Pyrolysis of Palm Kernel Shell to Chemicals by Using Bayah Natural Zeolites Suhendi, Endang; Naibaho, Pipiet P.U.; Fauzan, Eka R.; Kurniawan, Teguh
Jurnal Bahan Alam Terbarukan Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i1.22250

Abstract

Palm kernel shell (PKS) is one of the biomass with high potential that can be converted into chemicals. In this study, palm kernel shell (PKS) was converted by pyrolysis method to produce condensed liquid products, gas, and solid. The purpose of this study was to determine the effect of catalyst activation time on yields and characteristics of PKS waste pyrolysis products. The pyrolysis process was carried out at a temperature of 500oC. Based on the results obtained with the addition of catalysts at 7 hr of activation can reduce the yield of solid products by 1.5% wt and 9.01% wt of liquid and increase the yield of gas products by 10.51% wt. On the characteristics of solid product there is a decrease in volatile matter by 55.04% wt and an increase fixed carbon by 40.27% wt. The gas characteristics, the H2 and CO gas decreases by 5.43% v/v and 1.36% v/v and the increase in CH4 and CO2 gas by 1.07% v/v and 5.72% v/v. Characteristics of the liquid obtained an increase in the amount of acetic acid by 11.75% v/v and decrease phenol compounds by 13.08% v/v. The result liquid product can be applied as a chemical.
Athmospheric Hydrocracking of Jatropha Oil Using Woodchar Catalyst Hendriyana, Hendriyana; Nurdini, Lulu; Khotimah, Rizqi Ajeng Khusnul; Sukandi, Nur Refianti; Ainun, Tika Dwi; Nurjanah, Evi Ojo; Yunengsih, Yuyun; Khoerunnisa, Fadilah
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.27304

Abstract

Jatropha oil which is non-edible oil were hydro-crack at atmospheric pressure using an activated wood char catalyst in a fixed bed reactor. The hydro-cracking process was carried out at three temperature variations of 400, 450 and 500oC, and three variations of the oil feed injection rate of 2/2, 2/5 and 2 mL/10 minutes. The catalysts were characterized using SEM and BET. The composition of the liquid product obtained from the hydro-cracking process was analyzed using GC-MS. The effects of operating temperature and oil feed injection rate on oil recovery and conversion have been discussed. The results showed that the feed injection temperature and rate had an effect on the yield and conversion. The highest yield of 59.8% oil liquid products was achieved at a temperature of 450oC with injection rate of 2 mL/10 min. The composition of the oil-liquid product was dominated by heptanal at 32.9% -mass. Alkanes group contain C5 to C20 and alkene compounds consist of C8 until C18.
Preparation of Polyelectrolyte Complex Films of Chitosan-Alginate Incorporated by Eugenol and its Potency as an Antioxidant Packaging Riyandari, Baiq Amelia
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.26146

Abstract

Preparation of PEC chitosan-alginate films incorporated by eugenol has been investigated. Incorporation of eugenol in chitosan-alginate films was conducted by using the different concentration of eugenol including 0.25% 0.5%, and 1% (% w/v). The effect of eugenol incorporation in chitosan-alginate films was investigated through some properties of the films such as tensile strength, elongation at break, transparency value, and water vapor permeability. Meanwhile, the effectiveness of eugenol incorporation as an active compound of the films was investigated from antioxidant activity of chitosan-alginate films incorporated eugenol. Polyelectrolyte complex (PEC) films of chitosan-alginate was occurred through molecular interaction between polycationic groups of chitosan and polyanionic groups of alginate. The formation of chitosan-alginate PEC films was synthesized at pH ± 4.0. Based on FTIR analysis, the ionic interaction between amine groups (–NH3+) and carboxylate groups (–COO¬) formed strongly. Characterization of films also indicated that PEC films of chitosan-alginate incorporated of eugenol was formed. Study showed that PEC chitosan-alginate films had good mechanical properties. Antioxidant activity assay through  fixed reaction time method  using DPPH radical (α,α-difenil-β- pikrilhidrazil) resulted in good percentage of radical scavenging activity (%RSA) from the films. The E3 films which contain 1% eugenol has 55.99% of  RSA value in 96 hours.
Application of Bacterial Nano Cellulose as a Reinforcing Material in The Liner Test Paper Sriwedari, Daisy A; Sijabat, Edwin Kristianto
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.26812

Abstract

This research is about the application of Bacterial nano cellulose (BNC) as a reinforcing material in the making of liner test paper. BNC was obtained from the fermentation of banana peel extract using Gluconacetobacter xylinum bacteria obtained from the making starter of nata de coco. The reason for using banana peel waste is because it’s available in large number all across Indonesia. BNC is mixed with secondary fiber as a raw material for making liner test paper. From the experimental handsheets results, strength properties and absorption properties were then tested. Variations in the composition of the use of BNC are 0% (blank), 5%, 10%, 15%, 20%, 25%, 30% of the handsheet dry weight. The BNC is also applicated on surface sizing as a substitute for the surface sizing agent. The results of this study indicate that BNC can be used as an alternative raw material on wet end and on surface sizing, because both applications can increase the strength properties of liner test paper, and can reduce the use of chemical additive. The highest increase in strength properties of liner test paper was obtained at the composition of nano cellulose 30% and using surface sizing. Ring crush index is 14.02 Nm / g, concora index is 12.73 Nm / g, bursting index is 3.78 KPa.m² / g, ply bonding is 388.57 J / m². The absorption properties of paper increases but it has a low prosity. The highest cobb size results are obtained at 30% BNC composition, which is 45.30 g / m2 without using surface sizing and 41.83 g / m² using surface sizing. The highest porosity value is obtained at 30% BNC composition, which is 158 s / 100cc using surface sizing. This research is expected to be a reference for further research in the field of BNC, as the alternative raw materials besides wood in paper making.
Magnetically modified corn cob as a new low-cost biosorbent for removal of Cu (II) and Zn (II) from wastewater Lestari, Ajeng Yulianti Dwi; Chafidz, Achmad; Hapsari, Anindita Ratih; Elnaufal, Wildan Denly; Indri, Silvi Nurukma; Alatas, Mukhsin Moh; Mulyono, Sarwono
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.27136

Abstract

Wastewater containing heavy metals can potentially harm the human and living organisms and also damage the environment and ecosystem. Wastewater containing total copper (Cu) and zinc (Zn) over the normal threshold will result in Wilson's disease and digestive health, respectively. One of the most widely used methods to remove heavy metals from wastewater is adsorption. One type of adsorbent that has gained interest among researchers was biomass-based adsorbent or biosorbent. In this work, magnetic modification was used to increase the adsorption capacity of the biosorbent. Therefore, the aim of this study was to determine the effect of magnetic modification of corncobs as biosorbent on the adsorption of Cu(II) and Zn(II) heavy metals from an aqueous solution. Magnetic modification with FeCl3.7H2O on corncobs has successfully increased the adsorption capability of Zn(II) and Cu(II) from aqueous solution. The optimum modification ratios for the adsorption of Zn(II) and Cu(II) were 1:2 and 2:1. The adsorption of these both heavy metals took place at temperature of 50°C with the adsorbent doses of 1 g and 1.5 g for Cu(II) and Zn(II), respectively. The highest adsorption percentages for the adsorption of Zn(II) and Cu(II) were 89.3% and 89.2%, respectively. Whereas, the maximum adsorption capacities of Cu(II) and Zn(II) were 75.76 mg/g and 63.93 mg/g, respectively. The adsorption mechanism of Zn(II) and Cu(II) has followed the Freundlich isothermal adsorption model.
Characteristics of Environmentally Friendly Food Container Composite Made From Sorghum Bagasse and Citric Acid ismadi, ismadi; Kusumah, Sukma Surya; Subyakto, Subyakto; Subiyanto, Bambang; Suryanegara, Lisman; Marlina, Resti
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.27345

Abstract

The common food container product was made from plastic such as polypropylene, polystyrene, etc which has slowed to degrade hence affected to the environmental pollution and health disorder. Therefore, environmentally friendly food container composite is developed from sustainable resources such as sorghum bagasse and citric acid. The effects of sorghum species, sorghum particles and citric acid content on the composite properties were investigated. Local species of sorghum was used as raw material such as Super 2 in the manufacturing of food packaging.  The size and moisture content of the particles were passthrough on 40 mesh and 10%, respectively. The content of the particle was variated such as 10, 15, and 20% wt. Furthermore, citric acid was used as a binder with difference content such as 10, 20, and 30% wt.  Those raw materials were mixed with tapioca starch, polyvinyl alcohol (PVA), and glutaraldehyde. The mixing material was hot pressed at 180 ℃ for 15 minutes. The composite dimension was 12 cm x 10 cm x 3 mm. The physical and mechanical properties of the composite were carried out. Considering the properties of the composite, sorghum bagasse and citric acid are suitable as raw material of food container composite.
Active Charcoal from Palm Kernel Shells as a Catalyst in The Production of Biodiesel Astuti, Erna; Mufrodi, Zahrul; Budiarti, Gita Indah; Dewi, Ayu Citra; Husna, Mar'atul
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.21991

Abstract

Palm kernel shells are one of the main wastes for processing of palm oil. Palm kernel shells are waste that can be used as a catalyst in the biodiesel production. Besides many natural ingredients, the price of catalyst prepared from these materials is also relatively cheap compared to other catalysts, make the biodiesel production more sustainable, and environmentally friendly. This study aims to make activated carbon from palm shell through the process of carbonization and chemical activation. The carbonization process was carried out at 550oC for 3 hours until charcoal was formed. While the activation process was carried out using ZnCl2 activators with concentrations of 0.1 M, 0.25 M, 0.5 M and 1 M which were activated for 4 hours at 90oC.  Based on the results of the FTIR analysis the presence of O-H and C-O bonds indicates that the carbon produced from the palm kernel shell tends to be polar (volatile). Thus the charcoal produced can be used as catalyst in the biodiesel production. For the SEM test results, it can be seen morphologically that more pore crystals are added and are still brittle at a ZnCl2 concentration of 0.1 M. Based on FTIR and SEM analysis, the best activated charcoal was activated charcoal with a concentration of 0.25 M ZnCl2.

Page 21 of 43 | Total Record : 426

 19   20   21   22   23 

Filter by Year

2012 2024


Reset
Filter By Issues
All Issue Vol 13, No 1 (2024): June 2024 [Nationally Accredited Sinta 2] Vol 12, No 2 (2023): December 2023 [Nationally Accredited Sinta 2] Vol 12, No 1 (2023): June 2023 [Nationally Accredited - Sinta 2] Vol 11, No 2 (2022): December 2022 [Nationally Accredited - Sinta 2] Vol 11, No 1 (2022): June 2022 [Nationally Accredited - SINTA 2] Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2] Vol 10, No 1 (2021): June 2021 [Nationally Accredited - SINTA 2] Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2] Vol 9, No 1 (2020): June 2020 [Nationally Accredited - Sinta 2] Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2] Vol 8, No 1 (2019): June 2019 [Nationally Accredited - Sinta 2] Vol 7, No 2 (2018): December 2018 [Nationally Accredited] Vol 7, No 1 (2018): June 2018 [Nationally Accredited] Vol 6, No 2 (2017): December 2017 [Nationally Accredited] Vol 6, No 1 (2017): June 2017 [Nationally Accredited] Vol 6, No 1 (2017): June 2017 [Nationally Accredited] Vol 5, No 2 (2016): December 2016 [Nationally Accredited] Vol 5, No 2 (2016): December 2016 [Nationally Accredited] Vol 5, No 1 (2016): June 2016 [Nationally Accredited] Vol 5, No 1 (2016): June 2016 [Nationally Accredited] Vol 4, No 2 (2015): December 2015 Vol 4, No 2 (2015): December 2015 Vol 4, No 1 (2015): June 2015 Vol 4, No 1 (2015): June 2015 Vol 3, No 2 (2014): December 2014 Vol 3, No 2 (2014): December 2014 Vol 3, No 1 (2014): June 2014 Vol 3, No 1 (2014): June 2014 Vol 2, No 2 (2013): December 2013 Vol 2, No 2 (2013): December 2013 Vol 2, No 1 (2013): June 2013 Vol 2, No 1 (2013): June 2013 Vol 1, No 2 (2012): December 2012 Vol 1, No 2 (2012): December 2012 Vol 1, No 1 (2012): June 2012 Vol 1, No 1 (2012): June 2012 More Issue