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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Korelasi Empirik Kompresibilitas Tanah Permukaan Di Kota Pekanbaru Wahyudi, Akmam; Satibi, Syawal; Nugroho, S A
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

preliminary study is needed to provide a general overview as well as the characteristics of the local soil conditions. So, we need an estimate of the local soil conditions and characteristics based on soil conditions and characteristics that have been known about the condition and characteristics, in order for a plan to be more efficient. Basically one soil parameter that is needed in the design of index compression (compression index) can be found using the correlation formula. This study aims to find the correlation formula recommendations more precise than some formula to use in calculating or predicting the value of index compression. Hand drill data obtained from the Laboratory of Soil Mechanics. To find a correlation formula recommendations, used some statistical parameters such as mean, standard deviation, and correlation index. Zoning analysis results showed that the thickness of the soft soil in general area of Pekanbaru has soft soil thickness was (a thickness of ten to fifteen feet). Zoning analysis results showed that the level of congestion ground Pekanbaru City area has a moderate level of congestion ground. From the evaluation of the correlation formula, based on static parameters obtained correlation formula recommendations azzous et al (1976) that Cc = 0:40 (E-0.25) and Cc = -0156 + + 0.00058wn sebgai 0.41eo correlation formula is best used in Pkenabaru.Keywords: soft ground, index compression, empirical correlations, the statistical parameters
Identifikasi Parameter Signifikan Dalam Penentuan Prioritas Rencana Pengembangan Daerah Irigasi (DI) Kabupaten Rokan Hulu Rumeisyah, Rumeisyah; Sandhyavitri, Ari; Fauzi, Manyuk
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Rokan Hulu is one of districts that are members of the Operasi Pangan Riau Mandiri program (OPRM) which is a program implemented by the Riau Province in order to achieve self-sufficiency in rice for the Riau Province in 2013. To support the program, the governments of Rokan Hulu sought to develop rice fields irrigated area. Under budget constraint it is necessary to identify priority in the development plan for the irrigation area.This research discusses prioritization approache in developing of the irrigation areas based from the Analytical Hierarchy Process (AHP) method. Five criteria for development of the irrigation areas are prioritited as follow: technical aspec, economic, environmental, social/cultural and institutional.The results of the AHP analysis obtained the significant parameters as the following order: institutional (45,0%), technical criteria (21,9%), economic criteria (18,6%), Social/Culture criteria (8,6%), and environmental criteria (5,9%). The significant sub-criteria as the following order: the performance of farmer groups P3A, the condition and function of irrigation channel, availability of rehabilitation funds from local government (APBD), the availability of farmers implementing and availability of water resources. The significant irrigation areas are prioritited as follow Kaiti Samo irrigation area (56,9%)I, Menaming irrigation area (19,7%)II, Palis irrigation area (14,2%)III, Perak irrigation area (9,3%)IV.Keywords: analytical hierarchy process, Irrigation areas, Priority, Rokan Hulu
Evaluasi Kurva Beban Harian Energi Listrik Terhadap Kapasitas Transformator Untuk Keperluan Pengembangan Jaringan Distribusi Fakultas Teknik Universitas Riau
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Faculty of Engineering is one of faculty which belongs to University of Riau, which consists of 10 buildings as follows: C building, 3 of chemical engineering laboratory buildings, 3 of civil engineering laboratory buildings, mechanical engineering laboratory, and electrical engineering laboratory. The electric power installed in the Faculty of Engineering supplied from PLN with 2 pieces of transformer which capacity of 2 x 400 kVA. The large of attached power and used power still need to be evaluated to forming the daily load curve considering that the engineering faculty which keep on experiencing development and construction that has been planned in the future. From the curve is formed it will be known how the electrical conditions in the Faculty of Engineering as well as for the achievement of a reliably electrical installation systems, safe, and used as efficiently as possible. From the analysis of measurements for 1 month and the calculation of the maximum load of 286,7 kVA, so that the remaining power which can be used for development and construction is 513,3 kVA.Keywords:Distribution System, Load Curve, Electric Power
The Estimate Of Building Maintenance Cost Based On Building Conservation And Maintenance Guide (Permen Number: 24/PRT/M/2008) (Case Study On Kampar Regency Office) Lidno Fery HS; Rian Trikomara; Hendra Taufik
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Abstract

Buiiding maintenance in consistent manner has become a requirement that has to be fulfilled. Especially for buildings intended for public service. Rationally, the level of which the building is easy to maintenance will significantly affect the cost every year. considering the problems above, it is therefore required to conduct a study regarding maintenance cost to make system of assessment to help determine priority scale for maintenance of Kampar regency office base on Permen no. 24/PRT/M/2008. It is expected that with this system. The process of maintenance and concervation of Kampar regency office will be make effective and right on target. The cost of the repair was analysis using approximate estimate with the highest unit price per square meter for high rise building from the result of the analysis using the above metho. The repair cost needed is Rp. 289,587,503.16,- with the percentage of damage at 1.62 %. The damage occurred on Kampar regency office is still consired as minor damage which is below. The below percentage required of 30% from maximumconstruction cost for new building. While the maintenance cost is Rp. 2,408,379,210.60,-and increase annually at 7.55% Every years.Keywords: approximate estimate, repair costs, maintenance costs, buildingmaintenance, regency office of Kampar
Studi Kelayakan Teknis Dan Finansial Proyek Pembangunan Hotel X Pekanbaru Shesilya Febita; Hendra Taufik
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Rapid development of hotel constructions in Pekanbaru due to economic growth make national and international investors eager to transform Pekanbaru City into business place. Investation in lodging sector is very risky because the funds needed as initial investment is enormous. Therefore, appropriate technical and financial feasibility studies are necessary. The technical feasibility study includes the analysis of spaced required for parking slots, whereas the financial feasibility study includes the analysis of net present value, benefit cost ratio, internal rate of return, payback period, and sensitivity analysis. The analysis result shows that the available parking slot is 188 SRP, which is smaller than the standard required parking slot stated by Dirjen Perhubungan Darat (279 SRP). This indicates that the available parking slots full fill about 67% of the standard parking requirement. Hotel investation Rp 265.276.637.520,55 with NPV Rp 55.955.191.071,46, BCR is 1,11, IRR 19,82% is bigger than return flow of 13,50% and PBP for 10 years and 7 months (project plan life is 50 years). In summary, the investation project of X Hotel construction is financially feasible if the minimum hotel occupancy of 46,90%. However, the investation project is not feasible for the technical aspect.Keywords : Technical Analysis, Financial Analysis, Sensitivity Analysis, X Hotel, Occupancy Hotel.
Analisis Karakteristik DAS Di Kota Pekanbaru Berbasis Sistem Imformasi Geografis Untuk Menganalisis Hidrograf Satuan Sintetik Fatiha Nadia; Manyuk Fauzi; Ary Sandhyavitri
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

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Abstract

A physical characteristic of a river is specifically able to describ by the morphometry parameters of a watershed. One method avalaible to analyze the characteristics of river stream is by itilizing the Digital Elevation Model (DEM) data obtained from the satellite image. Then this is processed by the GeographicInformation System (GIS) in order to develop river network mapping. Watershed characteristic data can be used to calculate the flood discharge using synthetic unit hydrograph method. Flood discharge data is used in many fields of waterresource design such as drainage, dams, and many others. Syhntetic unit hydrograph is the most pratical and simple method analyze flood discharge at watersheds which are not measurable. The most popular type of HSS is Gama Iand Nakayasu method. The principle of unit hydrograph with one millimeter of direct runoff is used to determine the most appropriate synthetic unit hydrograph method to be applied in watershed. In the case study of Siak-sub-watershed,Nakayasu method provides better result with less than 5% of error value and HDRO value close to 1 mm.Key words: Watershed characteristic, GIS, Gama I, Nakayasu, DRO
Pemanfaatan Kulit Telur Sebagai Sumber CaO Untuk Katalis Pada Transesterifikasi Sawit Off Grade Menjadi Biodiesel
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Indonesia produces waste eggshell are abundant and untapped optimally. Eggshell waste as a source of CaO has the advantage that environmentally friendly, reusable and economical and thus potentially be developed as a catalyst in the reaction of biodiesel from palm fruit off grade. This research aims to produce biodiesel from low-quality raw materials and determine the effectiveness of the process by looking at the effect of process conditions such as reaction temperature, mole ratio of oil: methanol and the concentration of CaO catalyst for biodiesel yield. The process of making biodiesel is done with two stages of the reaction of esterification and transesterification reactions because the raw materials used have a free fatty acid levels are high. Processing of the data in this study conducted by response surface methodology (RSM) using Design Expert 6.0.8 program, which attack determined by central composite experimental design (CCD), which consists of three variables. Obtaining the highest biodiesel obtained as much as 88,6% under the conditions of 60°C reaction temperature, mole ratio of oil: methanol 1: 9 and concentration of CaO is 3 wt%. The characteristics of biodiesel produced in the form of density, kinematic viscosity, acid number and flash point are in accordance with the standards of Indonesian biodiesel. Process conditions that give real effect on the yield of biodiesel is the reaction temperature and catalyst concentration.Keywords : biodiesel, calcium oxide, response surface methodology, palm fruit off grade, transesterification.
Pembuatan Biodiesel Dari Minyak Sawit Off-Grade Menggunakan Katalis CaO Yang Berasal Dari Kulit Telur Melalui Proses Dua Tahap Putri, Febrina Dwi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Biodiesel is an alternative the fuel of derived from vegetable oil transesterification reaction with methanol. Off-grade palm is one of the sources of vegetable oils that can be used as raw material for making biodiesel. In the transesterification reaction using a CaO catalyst. CaO obtained from calcined of eggshell at a temperature of 900ºC during 2 hours. This goal of research to produce biodiesel from off-grade palm use a two-stage reaction, study the performance of the CaO catalyst calcined of eggshell on the transesterification reaction, and determine the reaction of temperature influence, mole ratio of oil:methanol, and the concentration of catalyst on the yield of biodiesel transesterification reaction. Esterification is runned at a temperature of 60°C with a mole ratio of oil:methanol 1:12 and use1%wt of catalyst H2SO4. FFA can be lowered from 16.18% to 0.6%. Transesterification conducted with variations mole ratio of oil:methanol 1:7, 1:9, 1:11, catalyst of CaO concentrations are 2%wt, 4%wt, 6%wt, 50ºC, 60ºC, 70ºC of temperature’s reaction and reaction time during 2 hours. Processing of the data conducted by Response Surface Methodology (RSM), while the number of experiments are determined by Central Composite Design (CCD). Yield is resulted in this research are 62.30%-87.41%. Optimums yield is produced at a temperature of 70ºC with a mole ratio of oil:methanol 1:11 and catalyst of CaO 2%wt. Process conditions which significant effect on the yield of biodiesel are the reaction temperature, mole ratio of oil:methanol, and the interaction between temperature with mole ratio of oil:methanol but in the other side, the catalyst concentration does not have a significant influence.Keywords: biodiesel, CaO, off-grade palm oil, rsm, transesterification
Optimasi Proses Produksi Biodiesel Dari Sawit Off Grade Menggunakan Katalis Zeolit Alam Teraktivasi Pada Tahap Transesterifikasi Heriza Saputri; Zuchra Helwani; Hari Rionaldo
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Oil-palm off grade is a source of vegetable oil that unmaximum utilization from the rest of the sorting in Crude Palm Oil (CPO) factory. The availability of oil-palm off grade is about 7-10% of a CPO factory with capacity of 30 tons per hour. This research aims to produce biodiesel from oil-palm off grade with two-stage reaction (esterification and transesterification) using activated natural zeolite catalysts in transesterification reaction. The other aims of this research is to study the influence of the reaction temperature (50, 60, 70°C), the molar ratio methanol : oil (6:1, 8:1, 10:1), and catalyst concentration (1, 3, 5%-wt) to yield of biodiesel and also to predict the optimum of proccess condition that give maximum yield. Natural zeolite is modificated by impregnation with 75% KOH solution and calcined at 450°C for 4 hours. The highest yield of biodiesel is 92,04% at the reaction temperature of 60°C, the molar ratio of methanol : oil 8:1, and 3%-wt catalyst concentration.Keywords : oil-palm off grade, biodiesel, natural zeolite modificated, response surface methodology, transesterification
Sawit Off Grade Sebagai Bahan Baku Alternatif Pembuatan Biodiesel Melalui Proses Dua Tahap Menggunakan Katalis Zeolit Alam Yang Dimodifikasi Ayu Naluri; Hari Rionaldo; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Palm off grade is a sort of CPO mill utilization which is not maximized. Palm off grade produced approximately 7-10% of the processing capacity of the plant CPO. Oil-palm off grade has a high free fatty acid contents, so it needs two stage process to produce biodiesel. The purpose of this research is to produce biodiesel with a maximum yield above 90%, determine the effectiveness of biodiesel production using a two-stage process with natural zeolite catalysts and determine the effect of temperature, mole ratio of oil : methanol and the concentration of catalyst to biodiesel yield. In this research, natural zeolite modified using 75% KOH solution. Then, biodiesel production have done in two stage, that was esterification and transesterification with variation of temperature (50°C, 60°C, 70°C), mole ratio of oil : methanol (1: 6, 1: 8, 1:10) and concentration of catalyst (2%-w, 4%-w, 6%-w) in transesterification. The highest yield of biodiesel is 96.99% at temperature 60°C, mole ratio of oil : methanol 1: 8 and concentration catalyst 4%-w. The result showed that the process conditions which influencing the yield of biodiesel is the reaction temperature and catalyst concentration.Keywords: biodiesel, natural zeolite, off grade palm oil, response surface methodology.

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