cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Azridjal Aziz
Contact Email
azridjal.aziz@lecturer.unri.ac.id
Phone
+6285263006442
Journal Mail Official
azridjal.aziz@lecturer.unri.ac.id
Editorial Address
Jl. Soebrantas km 12,5 Kampus Bina Widya, Simpang Baru Panam, Pekanbaru 28293, RIAU
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Sains dan Teknologi
Published by Universitas Riau
ISSN : 14126257     EISSN : 25499742     DOI : https://dx.doi.org/10.31258/jst
Core Subject : Science, Education, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Mechanical Engineering
Jurnal Sains dan Teknologi (JST), is a peer-reviewed scientific journal published regularly every six months, namely in March and September. The reviewing results will be provided within four weeks for most of the submitted articles. Articles are submitted for review with the understanding that they have not been published elsewhere. Each author is advised to submit the articles using article template of JST. Authors need to pay the publication fee. The author(s) will be responsible for proof-reading the article. There are two issues a year for this Journal and reviewing results will be provided within four weeks for most of the submitted manuscripts. Details of electronic submission are shown on the JST homepage.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 192 Documents
 16   17   18   19   20 
MITIGASI RISIKO KETERLAMBATAN PROYEK PERBAIKAN TANGKI MINYAK MENTAH DI DURI DENGAN SIMULASI MONTE CARLO Arvin; Ari Sandhyavitri; Muhammad Ikhsan
Jurnal Sains dan Teknologi Vol 17 No 2 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Activities on the critical path have potential to delay the completion of a project. Critical path has a dominant risk and influential on the next job if it is late to start and finish. Activities on tank repair projects has a series of critical path of high-risk. It need to register risks to identified schedule of a project, greatly helps project management to minimizing the delay in the time a project activities.The objectives of this research are to identify, analyze and mitigate the risk factors for delays in the tank repair project located in Duri, Bengkalis Regency. As are results of identification there are 29 risk factors that cause project delays. After the risk level grouping analysis is carried out, 8 higher and dominant level risk factors are generated which greatly influence and significantly affect project delays including work safety factors during construction, lack of experienced human resources, critical path work, contractor experience, limited equipment availability, process of obtaining constrained daily work permits, lack of qualified supervisors, and lack of coordination between the teams involved. Based on risk factors, the project has experienced a delay of 257 working days. After risk mitigation is carried out, assuming the value of the risk amount is reduced about 17,34%, it is carried out using Monte Carlo simulation to estimate total time of completion of the project using @Risk program. Monte Carlo simulation using program @Risk for Excel able to estimate total duration of the project to get accurate results.
FERMENTASI KULIT NANAS MENGGUNAKAN CLOSTRIDIUM ACETOBUTYLICUM DENGAN VARIASI NUTRISI DAN INOKULUM Sri Rezeki Mulia; Elvie Yenie; Mayang Sari
Jurnal Sains dan Teknologi Vol 17 No 2 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Bioethanol is a fuel extracted from plant by fermentation process. Energy consumption increases steadily as world population increases and concerns about atmospheric pollution derived from fossil fuels have resulted in a worldwide interest in exploring for renewable energy in the form of bioenergy. The conversion of agriculture waste into biofuels so interesting now. The present study describes ethanol production from ananas waste by Clostridium acetobutylicum. This study was carried out to investigate the effect of variations inoculum, nutrition and fermentation time on the product yield resulting from fermentation using Clostridium acetobutylicum. The experiment was divided into three stages which included inoculum preparations, fermentation process and analysis. The result showed that the highest bioethanol production 9% was obtained at 8 days incubation period, using urea nutrition and 14% inoculum size. Bioethanol content increased with increasing fermentation time until 8 days after that decrease at 10 days. In contrast bioethanol concentration increased with increasing inoculum concentration until optimum condition. Nutrition urea better than using amonium sulphate.
PENGENDALIAN KEBISINGAN DENGAN METODE CONCEPTUAL MODEL DI PABRIK KELAPA SAWIT PT. TUNGGAL PERKASA PLANTATIONS Aryo Sasmita; Jecky Asmura; Nandia Rian Ambarwati
Jurnal Sains dan Teknologi Vol 17 No 2 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

To support the production process in order to meet the demands of increased productivity, the palm oil mill has implemented a mechanization system on the tools and machinery of the palm fruit processing industry. With the application of mechanization of production, it can cause adverse effects on the health of the workforce, one of which is noise disturbance while working. This study aims to provide an alternative solution to noise problems in research locations using the conceptual model. The research method was carried out by measuring noise taken at 139 points in the production area and loading ramp, then compared with the maximum intensity of noise allowed at the workplace and calculating the length of time workers may be exposed to noise. From the results of the study it was found that there were 43 points that exceeded the maximum intensity and noise standards at the point 69 with 99.7 dB. The maximum exposure time at this point is only 16.08 minutes if you do not use Personal protective equipment. Noise control with the conceptual model can be done internally, namely by controlling the source, in the intermediary or at the recipient. External controls are carried out by conducting routine health checks, K3 training and installing noise warning signs.
PENGARUH BEBAN PENDINGIN PADA MESIN PENKONDISIAN UDARA HIBRIDA DENGAN KONDENSOR DUMMY TIPE MULTI HELICAL COIL SEBAGAI WATER HEATER Afdhal Kurniawan Mainil; Sarwo Fikri; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 17 No 2 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Air conditioning machines are generally used to provide a cooling effect. The cooling effect is intended to provide comfortable zone in a cooled room, so that a sense of comfort makes people feel at home in it. Most air conditioning machines operate thermodynamically using a vapor compression cycle, where heat is absorbed inside of the evaporator in the room, then this heat is discharged in an outdoor condenser. This process can take place because of the compressor's work and the pressure drop that occurs in the expansion valve or capillary pipe, so that the vapor compression cycle works perfectly. In air conditioning systems usually heat is wasted useless, the heat can be used to heat water with the addition of a dummy condenser. The addition of a dummy condenser in this study was conducted to see the effect of adding a dummy condenser to cooling load, compression power, temperature, and the Coefficient of Performance (COP). The method used in this study is the design and experimental methods. Based on the results of the test, during the 120 minute operation the hot water temperature achieved at no load conditions (0W), 1000W, 2000W and 3000W loads are 52.83oC, 56.58oC, 57.93oC and 64.73oC, respectively.
PENGARUH PEMAKAIAN PEREMAJA ANTI RAYAP DAN ASPAL PEN 60/70 TERHADAP KINERJA RAP ( RECLAIMED ASPHALT PAVEMENT ) AC-WC GRADASI HALUS BERDASARKAN UJI MARSHALL Afdal; Gunawan Wibisono; Muhardi
Jurnal Sains dan Teknologi Vol 17 No 1 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

The need for asphalt and aggregates for the construction and maintenance of asphalt pavement is increasing every year, even though asphalt is always imported and the availability of aggregates is also decreasing. To overcome these problems, one of the efforts to overcome them is by utilizing waste products obtained from flexible pavement maintenance activities, namely paved recycled material Reclaimed Asphalt Pavement (RAP). The purpose of this study was to evaluate the effect of two rejuvenating ingredients, namely: termite and Asphalt pen 60/70 residues on the performance of hot paved mixtures using Reclaimed Asphalt Pavement (RAP). The methodology used was experimental in the laboratory, comparing the performance of asphalt mixtures using Reclaimed Asphalt Pavement plus rejuvenating and non- reinforcing use, and comparing the effects of two types of refractory to the performance of each hot asphalt mixture. The results of this study indicate that the use of Reclaimed Asphalt Pavement (RAP) in a mixture of non-rejuvenating hot asphalt stability values of 2357.905 kg, the test results on deformation and fatigue resistance is 5.033 mm. The Marshal Quotient value is 555,742 kg / mm, for the addition of 60/70 pen asphalt reinforcement by 1.0% stability value to 2644,959 kg and flow 6,067 mm, Marshall Quotient 442,411 kg / mm. For the addition of anti-termite residue material + 60/70 asphalt the best value obtained at the addition of 1.0 + 1.0 with stability value 1596.450 kg flow value 4,600 mm and Marshall Quotient value 346,661 kg / mm there is a decrease in stability but still meet the requirements of the Bina Marga specification in 2010.
EVALUASI INSTABILITAS RANGKA ATAP BAJA RINGAN SESUAI SNI 7971-2013 Widya Apriani
Jurnal Sains dan Teknologi Vol 17 No 1 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Failure of the roof frame structure can cause to large losses for the owner of the building and threaten the security and safety of building users. Collapse can be caused by planning and implementation factors. In 2016 there was a failure of roof frame structure at Building X in Pekanbaru which resulted in almost the entire roof frame collapsed. Based on visual observation there is failure at connection and buckling in some stems. Through direct observation, Scheme of roof collapse of howe girder type of roof that occurs in part in the supporting span and overall collapse in the main span. The study was conducted by analysis of numerical analysis to determine the instability of truss elements using a computer program in accordance with SNI 7971-2013. The analysis was performed for the collapse pattern of roof truss structure. The analysis includes the aksial force when the structure fails. The result of the evaluation showed that the cold rolled steel roof truss element in building x still did not meet the criteria of SNI 7971-2013 planning. Unstable press element after applied load which has been combined.
ANALISIS DAYA TAMPUNG BEBAN PENCEMARAN AIR SUNGAI MENGGUNAKAN PENDEKATAN WATER QUALITY ANALISYS SIMULATION PROGRAM (WASP)7.3 (DAS SIAK BAGIAN HILIR KABUPATEN SIAK) Ivnaini Andesgur; Imam Suprayogi; Pipi Handrianti
Jurnal Sains dan Teknologi Vol 17 No 1 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

The Siak River Basin (DAS) including its special downstream river basin, where the decrease of river flow and water quality is triggered by increased activity along the river flow that is dominated by plantation activities. This study aims to analyze the load pollution load of BOD, COD and TSS in Siak downstream watershed using WASP 7.3 method; and determine the amount of pollution load reduction. Siak River Basin downstream is divided into 14 segments then simulated load pollution parameters BOD, COD and TSS in each segment. In this simulation, the minimum discharge of 151 m3 / dt is followed by reducing the pollution load by 75%, 50% and 25% until in accordance with the standard water quality of class II. In this simulation, the minimum discharge of 151 m3 / dt is followed by reducing the pollution load by 75%, 50% and 25% until in accordance with the standard water quality of class II. WASP7.3 Modeling Results Siak Siege Load Capacity of Siak Siak downstream of Siak District at minimum discharge respectively for BOD parameters of -68,877.82 kg / day, COD of -300.242,11 kg / day and TSS of -169,065,78 kg / day, where the minus sign (-) indicates that the pollutant load exceeds the capacity of the river. The BOD parameter is the highest parameter of reduction because all segments of Siak DAS downstream of Siak regency exceed the standard class for class II. Siak River Basin capacity downstream of Siak district to accommodate pollutant load based on standard quality for class II after the reduction of each pollutant parameters is 75% BOD 12,134.95 kg / day, COD 50% of 12,958.94 kg / day, and TSS 25% of 36,280.66 kg / day.
ANALISA KUANTITATIF DEBIT SUNGAI SAIL MENGGUNAKAN MODEL RAINRUN Jecky Asmura; Imam Suprayogi; Septya Ardiani
Jurnal Sains dan Teknologi Vol 17 No 1 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

The Sail River is considered to be a potential source of raw water. This study aims to determine the quantity of Sail River related to reliable discharge, the water balance of the Sail River which can be used as a source of raw water, in this case the supply of clean water to meet the needs of the people of Bukit Raya District. The calculation results obtained a reliable discharge of 95% River Sail of 0.21 m3/s. Domestic and non-domestic clean water needs in 2033 are 0.283 m3/sec. Based on the amount of discharge available in the river and the amount of clean water demand, it is known that the Sail River water balance has a water deficit of -0,073 m3/s.
OPTIMASI PROSES PEMUTIHAN ACACIA KRAFT PULP DENGAN PROSES BIOBLEACHING SEBELUM CHEMICAL BLEACHING UNTUK MENGURANGI PEMAKAIAN BAHAN KIMIA Amrizal; Adrianto Ahmad; Bahruddin
Jurnal Sains dan Teknologi Vol 15 No 2 (2016): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Proses pemutihan pulp dengan enzim (Biobleaching) sebelum pemutihan dengan bahan kimia membantu menurunkan konsumsi bahan kimia pemutih (ClO2). Penelitian ini bertujuan untuk mengetahui kondisi optimum proses biobleaching terhadap kenaikkan derajat kecerahan pulp, pengaruhnya terhadap konsumsi ClO2 dan kualitas pulp serta dampaknya terhadap lingkungan. Sampel kraft pulp, terbuat dari campuran kayu acacia mangium, acacia crassicarpa dan eucalyptus. Enzim yang digunakan xylanase dengan aktivitas enzim sebesar 5000 IU/ml. Variabel proses terdiri dari waktu (X1), suhu (X2), pH (X3), dan dosis enzim (X4). Optimasi dilakukan pada berbagai variasi waktu (30, 60, 120, 180) menit, suhu (60, 70) oC, pH (4, 5, 6, 7, 8), dan dosis (0,2, 0,5, 1,0) kg/ton pulp dimana biaya enzim dan bahan kimia sebagai faktor kendala. Hasil penelitian menunjukkan bahwa pH dan dosis enzim merupakan faktor signifikan yang berpengaruh terhadap kenaikan derajat kecerahan pulp. Hubungan antara kenaikkan derajat kecerahan (Y) terhadap pH dan dosis enzim ditunjukkan dengan persamaan Y = 0,792+0,576X3+0,688X4. Kondisi optimum biobleching diperoleh pada pH 8 dan dosis enzim 0,142 kg/Ton pulp dimana kenaikkan derajat kecerahan adalah sebesar 5,5%. Konsumsi ClO2 turun 15,2% dan kadar AOX turun 30% dibandingkan proses tanpa enzim. Kekuatan tarik pulp menunjukkan kenaikkan dari 64,2 N/m2 menjadi 65,2 N/m2 .
KAJI EKSPERIMENTAL PEMBANGKIT LISTRIK BERBASIS THERMOELECTRIC GENERATOR (TEG) DENGAN PENDINGINAN MENGGUNAKAN UDARA Hasra Rafika; Rahmat Iman Mainil; Azridjal Aziz
Jurnal Sains dan Teknologi Vol 15 No 2 (2016): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik - Universitas Riau

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

Abstract

Termoelektrik adalah suatu perangkat yang dapat mengubah energi kalor (perbedaan temperatur) menjadi energi listrik. Pembangkit daya termoelektrik (Thermoelectric Generator / TEG) digunakan untuk menghasilkan energi listrik. Ketika perbedaan temperatur terjadi antara dua material semi konduktor yang berbeda, maka elemen termoelektrik ini akan mengalirkan arus sehingga menghasilkan perbedaan tegangan. Prinsip ini dikenal dengan nama ‘efek Seebeck’ yang merupakan fenomena kebalikan dari efek peltier TEC (Thermoelectric Cooling). Penelitian ini bertujuan untuk mengetahui potensi energi listrik yang bersumber dari elemen termoelektrik sebanyak empat buah dengan tipe TEC 12706 dan tipe TEG SP 1848. Sumber panas disimulasikan dengan menggunakan heater tegangan 60 volt, sedangkan sisi pendinginan menggunakan fan kecepatan 3,5 m/s. Hasil pengujian menunjukkan bahwa Thermoelectric tipe TEG SP 1848 menghasilkan daya maksimum 0,055 W, arus 0,279 A, sedangkan tipe TEC 12706 menghasilkan daya maksimum 0,109 W arus 0,147 A, dengan perbedaan temperatur rata-rata 14,87 ºC. Kinerja elemen termoelektrik TEG tipe SP 1848 lebih besar potensi listrik yang dihasilkan dibandingkan TEC 12706.

Page 19 of 20 | Total Record : 192

 16   17   18   19   20 

Filter by Year

2012 2024


Reset
Filter By Issues
All Issue Vol 23 No 1 (2024): Jurnal Sains dan Teknologi Vol 22 No 2 (2023): Jurnal Sains dan Teknologi Vol 22 No 1 (2023): Jurnal Sains dan Teknologi Vol 21, No 2 (2022): Jurnal Sains dan Teknologi Vol 21 No 2 (2022): Jurnal Sains dan Teknologi Vol 21 No 1 (2022): Jurnal Sains dan Teknologi Vol 21, No 1 (2022): Jurnal Sains dan Teknologi Vol 20 No 2 (2021): Jurnal Sains dan Teknologi Vol 20, No 2 (2021): Jurnal Sains dan Teknologi Vol 20 No 1 (2021): Jurnal Sains dan Teknologi Vol 20, No 1 (2021): Jurnal Sains dan Teknologi Vol 19, No 2 (2020): Jurnal Sains dan Teknologi Vol 19 No 2 (2020): Jurnal Sains dan Teknologi Vol 19 No 1 (2020): Jurnal Sains dan Teknologi Vol 19, No 1 (2020): Jurnal Sains dan Teknologi Vol 18, No 2 (2019): Jurnal Sains dan Teknologi Vol 18 No 2 (2019): Jurnal Sains dan Teknologi Vol 18, No 1 (2019): Jurnal Sains dan Teknologi Vol 18 No 1 (2019): Jurnal Sains dan Teknologi Vol 17 No 2 (2018): Jurnal Sains dan Teknologi Vol 17, No 2 (2018): Jurnal Sains dan Teknologi Vol 17, No 1 (2018): Jurnal Sains dan Teknologi Vol 17 No 1 (2018): Jurnal Sains dan Teknologi Vol 16, No 2 (2017): Jurnal Sains dan Teknologi Vol 16, No 1 (2017): Jurnal Sains dan Teknologi Vol 15 No 2 (2016): Jurnal Sains dan Teknologi Vol 15, No 2 (2016): Jurnal Sains dan Teknologi Vol 15, No 1 (2016): Jurnal Sains dan Teknologi Vol 15 No 1 (2016): Jurnal Sains dan Teknologi Vol 14, No 2 (2015): Jurnal Sains dan Teknologi Vol 14 No 2 (2015): Jurnal Sains dan Teknologi Vol 14 No 1 (2015): Jurnal Sains dan Teknologi Vol 14, No 1 (2015): Jurnal Sains dan Teknologi Vol 13, No 2 (2014): Jurnal Sains dan Teknologi Vol 13, No 1 (2014): Jurnal Sains dan Teknologi Vol 12, No 2 (2013): Jurnal Sains dan Teknologi Vol 12, No 1 (2013): Jurnal Sains dan Teknologi Vol 11, No 2 (2012): Jurnal Sains dan Teknologi Vol 11, No 1 (2012): Jurnal Sains dan Teknologi More Issue