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 pekanbaru,
Riau
INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 3,145 Documents
 64   65   66   67   68 
Konversi Pati Sorgum Menjadi Bioetanol Menggunakan Variasi Konsentrasi Enzim Stargen tm 002 Dan Yeast Saccharomyces Cerevisiae Dengan Proses Sakarifikasi Dan Fermentasi Serentak Ilham Ilham; Chairul Chairul; Yelmida Azis
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sorghum is a resource of grain yield with 55-75% starch composition similar to corn, that was potential as raw material for production of bio ethanol. Research based sorghum bio ethanol manufacture carried out using enzymes stargenTM 002 and starch raw materials. The purpose of this study was to determine the concentration of substrate and the best time of fermentation to produce bio ethanol. The research method consists of hydrolysis and saccharification processes are aided by enzymes stargenTM 002 followed by a fermentation process using yeast Saccaromyces Cerevisiae, ferment at room temperature, pH 4.5, enzymes stargenTM 002 concentration 2,5% and evaporated at a temperature 1000C. Using enzyme concentration were 4%, 5%, 6% and 7%, particle size used was 60-80 mesh and time of fermentation 30, 36, 42, 48, 54, 60, 66 and 72 hours. At 6% concentration of enzyme and the optimum time is 60 hours can produce the highest bio ethanol concentration of 12.413% (v/v).Keyword: Bioethanol, Enzym StargenTM 002, Fermentation, Sorghum, Substract Concentrations.
Pembuatan Biodiesel Dari Biji Saga (Adhenantera Pavonina) Dengan Katalis Padat H-Zeolit James Becker; Syaiful Bahri; Syamsu Herman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Transesterification reaction is a reaction between the oil (triglyceride) with alcohol to produce methyl esters. One of commercial product is biodiesel. The production of biodieselfrom vegetable oils, especially seed oil saga is still very limited, it is necessary to develop a vegetable oil-based biodiesel. In this research, the manufacture of biodiesel bytransesterification reaction using natural zeolite catalysts are activated to H-Zeolite, with a variation of the molar ratio of reactants (1: 3, 1: 6 and 1: 9) and the number of H-zeolitecatalyst (6%, 8% and 10%) with a fixed variable is the reaction temperature 60 ° C, the reaction time of 200 minutes and the stirring speed of 200 rpm. From the test results showthat the molar ratio transesterification and the amount of catalyst affects the reaction rate toachieve equilibrium of the reaction. The best operating conditions obtained in this study isthe molar ratio of 1: 9 and the amount of catalyst 8% which resulted in a conversion reaction of 86.44%. Characteristics of biodiesel produced in this study meets the standards of commercial biodiesel with kinematic viscosity of 5.15 cp, specific gravity (40 ° C) 0.853 and saponification numbers were 0.49 mg KOH / g sample.Keywords : Biodiesel, H-zeolite, Oil, Transesterification.
Analisa Pengaruh Perbandingan Debit Bahan Bakar Gas Dengan Udara Pembakaran Terhadap Efisiensi Boiler Di PT. Chevron Pacific Indonesia Derry Hanriansyah Pratama; Ahmad Fadli; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Boiler is an equipment to generate steam. Steam has heat value in which used for some process. In this case, steam has been used for liftingoil from reservoir as an enhanced oil recovery. Operate boiler efficiently is a must. Operate boiler more efficiently can be achieved by fuel gas and air combustion adjustment. The objectives of this research are to know influences of excess oxygen for boiler efficiency and to know right composition between fuel gas and air combustion. Fix variables in this research are feed water flow (110 GPM) and heat value of fuel gas (1,000 BTU/scf). Fuel gas flow and air combustion flow are the adjustable variable. Fuel gas flow was adjusted in 5 flow variances (1050, 1070, 1090, 1110, and 1130 MSCFD). Air combustion flow was adjusted in 5 flow variances (70, 75, 80, 85, and 90% of louver opening). According to analysis results, the most efficient of boiler operation was 81.55%. That was achieved by 1050 MSCFD of fuel gas flow and 70% of air combustion flow. Boiler efficiency will decrease 2% in every 1% of excess oxygen increase.Keyword: boiler, steam, combustion, efficiency.
Kesetimbangan Adsorpsi Logam Fe (II) Menggunakan Karbon Aktif Dari Ampas Tebu Sebagai Adsorben Yuanita, Mira; Yenti, Silvia Reni; Chairul, Chairul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bagasse is a by-product from pressing liquid sugar. One of the efforts to control the bagasse is processed into activated carbon. This study aims to activated carbon from bagasse, study the effect of Fe (II) concentration on activated carbon from bagasse and adsorption equilibrium model. Processing bagasse into actived carbon carbonization process is carriedout at a temperature of 320 °C for 2 (two) hours. After that activated with KOH ratio 3:1. 2 grams of activated carbon was added to the beaker containing the solution of Fe (II) atvarious concentration (20; 30; and 40 ppm), and the reaction temperature (40; 50; and 60 °C). The results showed that activated carbon adsorption for 20 ppm and 40 °C is 90,80%,followed equilibrium Freundlich and Langmuir isotherm models (with regretion 0,986 and0,985) and the heat of reaction of 2,24 kcal/mol°K.Keywords : adsorption, ion Fe (II), adsorption isotherm, activated carbon
Studi Kajian Pembuatan Asam Oksalat Dengan Variasi Kecepatan Pengadukan Dan Lama Waktu Pengadukan Dari Bahan Dasar Ampas Tebu Afriandi Afriandi; Fajril Akbar; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bagasse is a by product from the processing of sugar cane into sugar. The growing number of bagasse quantitatively into environmental problems that require attention and special handling. The purpose of this research was conducted to study the effect of stirring speed variation and stirring time. Bagasse was reduced in size to 40 mesh, then added 250 ml of 4 N NaOH solution and stirred at a speed of 300 rpm for 20 minutes, after which the samples were heated in an oven at a temperature of 180 0C for 75 minutes, then the samples are removed and added to hot water ± 150 ml, then filtered and washed until the filtrate is clear. Samples added CaCl2 10% solution of 250 ml until the precipitate formed is then filtered, then the precipitate was dissolved by H2SO4 2 M, then filtered and washed using 96% ethanol as much as 15 ml. The filtrate heated using a water bath at a temperature of 70 0C ± 1 hr, then the filtrate cooled to oxalic acid precipitation in the form of white crystals. Results obtained was purified by recrystallization process using ethanol 96%. The crystals that formed were analyzed qualitatively and quantitatively, the qualitative analysis carried out by the test Fourier Transform Infrared Spectroscopy (FTIR), while the quantitative analysis conducted by test melting point of the Melting Point Apparatus and calculate yield. Based on the research that has been done obtained yield (%) highest oxalic acid at stirring speed of 600 rpm and a stirring time of 50 minutes long as many as 0.92 grams, with a yield (%) of 6.133%.Keywords : Bagasse, calcium chloride, oxalic acid, sodium hydroxide, sulfate acid
Pembuatan Foam Glass Menggunakan Limbah Pecahan Kaca Dan Abu Terbang (Fly Ash) Dari Pabrik Sawit Sihombing, Ambtenarie Jessica; Fadli, Ahmad; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Foam glass can be produced using cullet and fly ash with addition of dolomite as foaming agent. The aim of this research is to study the influence of adding compositon of glass powder and dolomite on the characterize of the foam glasses and to determine the best composition of the obtained foam glass. Firstly, cullets were milled using crusher. The fly ashwere calcined at 600ºC for 4 hours. Subsequently fly ash, glass powder and dolomite were sieved using 100 mesh sieve. Furthermore, 50 %wt of fly ash, (60, 55, 50, 45, 40, 35) %wt of glass powder and 8 %wt of dolomite were mixed in 32 %wt NaOH solution until formed a slurry. The slurry was stirred for 30 minutes. Slurry was dried in oven at 105ºC for 12 hoursuntil formed the dried green bodies. Green bodies was sintered at 900ºC for 30 minutes. The results show that the glass powder addition of 35-45 %wt obtained an increase in the bulkdensity and compressive strength of the foam glass. The best microstructures of pores can be obtained by adding 45 %wt glass powder and 8 %wt dolomite with bulk density dancompressive strength values of 1.041 gr/cm3; 2.877 MPa.Keywords : compressive strength, dolomite, foam glass, glass powder, palm oil fly ash
Impregnasi Logam Co, Cu Dan Ni Pada Hidroksiapatit Yang Disintesis Dari Kulit Kerang Lokan (Gelonia Expansa) Nuruzzaman Shiqhi; Yelmida A; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is a compound of calcium phosphate which is the main constituent of the inorganic component of human hard tissue such as bone and teeth. Hydroxyapatite (HAp) is a material used as a bone implant, adsorbents and catalysts. In this study, hydroxyapatite supported Cu catalyst was prepared using wet impregnation method. A series of Cu-HAp catalysts have been prepared by varying the amount of Cu viz., 3, 6 and 12 % w/w. The solutions were dried with stirring 350 rpm at 30 oC for 24 h. The dried samples were kept in oven maintained at 105 oC for a duration of 1 h. Finally, the dried catalyst were calcined at 500 oC for 3 h. The best results of the catalyst Cu-HAp used as the ratio to the metal Co and Ni. Impregnation results were analyzed using FTIR spectrophotometer, Surface Area Analyzer (SAA), X-ray diffraction (XRD) and Scanning Electron Microscopy - Electron Dispersive X-ray (SEM-EDX). Based on the analysis SAA synthesized HAp surface area was 17.753 m²/g, while the metal-HAp most optimal in Cu-HAp (3%) reached 31.138 m²/g, meaning that the increase in surface area reaches 75%. Results of analysis by X-ray diffraction, it shows insignificant different compare to HAp catalyst. Results of elemental analysis by SEM-EDX showed that the metal impregnation process on hydroxyapatite was quite successful. The impregnation process is influenced by stirring, drying and calcination process. Keywords: calcination, catalyst, hydroxyapatite, impregnation, metals (Cu, Co and Ni)
Pelapisan Hidroksiapatit Pada Stainless Steel 316L Menggunakan Metode DIP Coating Dengan Variasi Rasio Binder Pati Sagu Dan Waktu Pengadukan Hidayah, Putri Husni; Fadli, Ahmad; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Utilization of stainless steel 316L as bone implant could be done by coating hydroxyapatite on it’s surface, to obtain a material with good biocompatibility and mechanical strength. The purpose of this research is to coating hydroxyapatite on stainless steel 316L using starch asbinder and understand the influence of binder ratio and stirring time on characters of coating hydroxyapatite deposited by dip coating method. Stainless steel was cut into size 2×3cm2 and sterilized with acetone. The substrat then dipped into solution which consist of 10 gram hydroxyapatite, 20 gram aquadest and starch 1; 1,25 and 1,5 gram. The substrat wasdried at 110oC for 30 minutes and then sintered at 800oC for 1 hour. The result of SEM analysis showed that at 16 and 20 hour stirring time the coating thickness increased from 35μm to 77 μm. At 24 hour stirring time the obtained thickness was decrease to 60 μm. The coating thickness decreased with binder ratio, at binder ratio addition the thickness obtainedwas 60 μm, 58 μm and 35 μm, respectively. The shear strength was increase with binder ratio. While increasing stirring time decreased the shear strength. The highest shear strength obtained is 3,07 MPa. The layer that deposited on the substrat is contain 99,4% hydroxyapatite based on XRD analysis result.Keywords : Binder, Dip Coating, Hydroxyapatite, Stainless Steel.
Adsorpsi Ion Logam Pb Dengan Menggunakan Karbon Aktif Kulit Durian Yang Teraktivasi Nuvicha Rizqi Yuniva Zikra; Chairul Chairul; Silvia Reni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Lead (Pb) is purified so widely used by humans in a variety of activities. Environmental pollution by lead (Pb), mostly from human activities are extracting and exploiting these metals. One way to prevent environmental contamination that is the technique of adsorption using activated carbon from durian skin. Manufacture of activated carbon durian skin consists of sample preparation process, carbonization, activation with KOH, washing and sieving. Activated carbon durian skin with carbonization temperature 3200C for 2 hours, the activation is done by calcination at a temperature of 400oC for 2 hours with 0.1 N KOH activator and activated carbon filtration with a sieve size of 60, 80 and 100 mesh. From research conducted activated carbon has met the quality standards of quality according to SNI 06-3730-1995 activated carbon with a water concentration of 7.4%, 6.76% ash concentration, as well as the absorption of I2 solution of 576.95 mg/g. Activated carbon works very well in absorbing Pb where the sample was stirred with a speed of 140 rpm using the batch system. The contact time used after mixing is 60, 90 and 120 minutes. The size of the activated carbon from durian skin best for the entrapment of Pb is 100 mesh and 120 minutes contact time with the adsorbent adsorption efficiency reached 90.68%.Keywords: durian skin, adsorption, activated carbon, lead (Pb)
Karbonasi Pelepah Sawit Yemita, Sylvia; Helwani, Zuchra; Fatra, Warman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Palm fronds only used as a source of raw materials for animal feed, compost and organic fertilizer in the garden area so far. The heating value of palm fronds is 17.200 kJ/kg. The heating value can be improved by conducting carbonization process. Carbonization is a method to process biomass into solid fuel without oxygen where the temperature range is between 400-600 °C. The aim of this study is to produce a solid fuel from palm fronds by using carbonization process, to know the characteristics of products and to see the influence of reaction temperature, carbonization time and particle size of product towards heating value and volatile matter content. Carbonization temperature used were 400, 500, 600oC, carbonization time used were 90, 120, 150 minutes, and particle size used were 2, 4, 6 cm. Processing data in this study was conducted by Response Surface Methodology (RSM) by using Design Expert 7.0.0 program which is experimental design determined by Central Composite Design (CCD). The highest result of heating value was 28.469 kJ/kg at 400oC for 150 minutes and particle size 2 cm. The highest result of volatile matter content was 21,14 %-wt at 670oC for 120 minutes and particle size 4 cm. Significant process condition affecting the heating value was temperature and carbonization time. However, the condition affecting the volatile matter content were carbonization temperature, carbonization time and particle size.Keywords: Carbonization, Heating Value, Palm Frond, Volatile Matter.

Page 66 of 315 | Total Record : 3145

 64   65   66   67   68 

Filter by Year

2014 2022


Reset
Filter By Issues
All Issue Vol 9 (2022): Edisi 1 Januari s/d Juni 2022 Vol 8 (2021): Edisi 2 Juli s/d Desember 2021 Vol 8 (2021): Edisi 1 Januari s/d Juni 2021 Vol 7 (2020): Edisi 2 Juli s/d Desember 2020 Vol 7 (2020): Edisi 1 Januari s/d Juni 2020 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 2 Juli s/d Desember 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 2 Juli s/d Desember 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5 (2018): Edisi 1 Januari s/d Juni 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 5, No 1 (2018): Wisuda April Tahun 2018 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 4, No 1 (2017): Wisuda Februari Tahun 2017 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 3, No 1 (2016): Wisuda Februari Tahun 2016 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 2, No 1 (2015): Wisuda Februari Tahun 2015 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 Vol 1, No 1 (2014): Wisuda Februari Tahun 2014 More Issue