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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Efektifitas Poly Aluminium Chloride (PAC) Pada Pengolahan Limbah Lumpur Pemboran Sumur Minyak Yustinawati Yustinawati; Nirwana Nirwana; Irdoni HS
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

Handling on waste oil drilling mud in research area uses an integrated sludge waste treatment method known as Mud Centralized Treatment Facility (CMTF). One processing stage performed in CMTF is chemical treatment using aluminum sulfate coagulant where the process of coagulation is optimum yet because there were still contain sediment solids. Poly Aluminium Chloride (PAC) thus becomes an alternative coagulant for the treatment because the main properties of colloidal particles in PAC do coagulation in quickly and optimum pace. Research on the “Effectiveness Coagulant Treatment using Poly Aluminium Chloride on Waste Oil Drilling Mud" aims to evaluate the performance of PAC as coagulant in waste oil drilling mud compare to coagulant Aluminum Sulfate. Jar Test method resulting the optimum conditions of using PAC is on fast stirring speed 140 rpm and slow stirring speed 40 rpm in 6000 ppm (TSS: 84-88%, COD: 62-83% , Oil and grease: 73-75% and NH3: 69-92 %), while using aluminum sulfate in same stirring speed, the optimum result gain in 12,000 ppm (TSS: 34-77% , COD: 36-69% , Oil and grease: 39-55% and NH3: 53-55%). Based on two coagulants test result, the most effective coagulant is using PAC for waste oil drilling mud handling.Key words: Drilling mud, Coagulation, PAC
Alkaline Treatment of Oil Palm Frond Fibers by Using Extract of Oil Palm Empty Fruit Bunch Ash for Use in Natural Fiber Reinforced Composite
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

In Indonesia, 187 megaton biomass is produced from 8.11 million hectare oil palm plantation in 2009. The massive amount of biomass is mainly accounted for oil palm frond (OPF) and oil palm empty fruit bunch (EFB) which normally categorized as wastes. The properties of OPF fibers such as low density, low cost, less abrasion of equipment, safer production compare to synthetic fibers makes the fibers become an attractive reinforcement for composite. In this work, the utilization of oil palm empty fruit bunch ash is studied for OPF fiber-polyester resin composite to analyze the effect of condition processes. Water absorption, tensile and flexural strength were used to characterize the effects of alkaline treatment on modified OPF fibers in polyester resin. The work is focused on the effect of alkaline treatment time, temperature treatment and liquid to solid ratio that going to be analyzed using Response Surface Method-Central Composite Design (RSM-CCD). The highest tensile strength (44.87 MPa) resulted in 12 hours soaking time, 40ºC temperaturetreatment and 5:1 water to ash ratio. The highest flexural strength (120.50 MPa) was obtained at 1.3 hours soaking time, 4 dissolving ratio and 35oC temperature treatment. The lowest water absorption of composite (3.00%) is achieved on thelongest soaking time (14.7 hours), 4 dissolving ratio and 35oC temperature treatment.Keywords: Alkaline treatment; composite; palm oil empty fruit bunch ash palm oil frond.
Production of Natural Composite with Alkaline Treatment Using Empty Fruit Bunch Ash Extract Solution
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Abstract

Empty fruit bunch (EFB) is one of waste from oil palm mill which is abundantly available and sustainable but not optimally utilized. EFB fiber can be used as composite reinforcement. EFB fiber have a specific strength, low density, biodegradable and low cost. The combustion of EFB generated ash which is rich in potassium. Hydrolysis of EFB ash creates base solution that can be utilized in alkaline treatment process to increase the mechanical properties of natural composite. Objective of this research is to study the effect of alkaline treatment using EFB ash extract solution, to obtain the optimum process condition in alkaline treatment process, to characterize tensile strength, flexural strength and water absorption of the composite. Fiber with various length 1, 2 and 3 cm are soaked using EFB ash extract solution with various concentration of the extract solution 5, 10 and 15%wt for 12, 24 and 36 hours respectively. Tensile strength is tested by JIS K6781. Flexural strength is tested by ASTM D790 and ASTM D570 for water absorption testing. Design experiment using response surface method (RSM) used for response optimizing. Tensile strength resulted is increase with increasing fiber length and increasing concentration of the EFB ash extract solution. Longer soaking time caused brittleness in fiber so that the tensile strength is decrease. Flexural strength is increase with increasing fiber length. Increasing concentration of the EFB ash extract solution and longer soaking time decrease the flexural strength.Keywords: alkaline treatment; composite; EFB ash extract solution; EFB fiber; flexural strength; response surface method; tensile strength; water absorption.
Konversi Termal Kayu Akasia (Acacia Mangium) Menjadi Bio-Oil Dengan Teknologi Pirolisis Menggunakan Katalis Mo/NZA Meliagustin, Adilla; Bahri, Syaiful; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Abstract

Availability of petroleum fuels are increasingly limited. Limitations of petroleum fuels will not be balanced with the needs of the community will fuel increased day by day. To overcome these problems needed alternative energy sources that can be updated is one of the bio-oil. Bio-oil is produced from biomass with the pyrolysis process, in the absence of oxygen. The purpose of this research was the synthesis of bio-oil from akasia wood, determine the effect of the impregnation percentage of Mo metal and ratio of catalyst Mo/NZA on the yield of bio-oil and determine the physical and chemical characteristics of bio-oil. Pyrolysis using 50 grams acacia wood, 500 ml silinap and Mo/NZA catalyst with variations of the impregnation percentage of Mo metal 0%, 1%, 3% and 6%, and the variations ratio of catalyst Mo/NZA 3%, 6% and 9% of the biomass with a stirring speed of 300 rpm and a temperature of 320ºC for 120 minutes. In this research, the highest yield on the variation of the impregnation percentage of metal 3% and the ratio of catalyst 9% of the biomass amounted to 76,084%. Characteristics of bio-oil obtained were density 0,827 gr/ml, viscosity 2,032 cSt, acid number 88,677 mg NaOH /gr sample, and the flash point 43 oC. The results of GC-MS analysis, the dominant chemical components in the bio-oil were Cyclohexane (13,477%), 2,4-Hexadiene (2,610%), 6-Tridecene (1,920%), Propane (1,684%) and 4-Nonene (0,619 %).Keyword: Bio-oil, pyrolysis, catalyst Mo/NZA, akasia wood
Model Fisik Kincir Air Sebagai Pembangkit Listrik Akhiar Junaidi; Rinaldi Rinaldi; Andy Hendri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Abstract

One type of renewable energy is a small-scale hydropower, or often referred to as micro or also called micro hydro power plant (MHP). Microhydro get energy from water flow that has a certain height difference and flow velocity. The energy generated by physical model waterwheel is a renewable energy can be measured by using a digital torque tester is connected to the axis windmill models. High rotation speed does not necessarily have a great energy because if given half the load will greatly affect the rotation speed. This research is to develop the technology, materials, mechanical components, electronic component and system design of energy resources, so as to have a strategic impact on the development of technology and can be applied in the community. Wheel rotation measurement using rpm tachometer generates value that affects the value of the energy generated from the windmill. The model used is Undershot wheel.Keyword : PLTMH, Torque Tester, Rpm, Undershot
Penelusuran Banjir (Flood Routing) Terhadap Muka Air Sungai Dengan Metode Jaringan Saraf Tiruan (Studi Kasus DAS Kampar Dan DAS Siak) Rico Ardiansyah Amri; Manyuk Fauzi; Siswanto Siswanto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Abstract

River water level data forecasting Qn to Qn+1 by using Artificial Neural Network model approach Backpropagation algorithm produces good value if the value of the correlation between upstream and downstream AWLR good enough, it can be seen from the process of training, testing and validation of the neural network that generates the value correlation learning high enough. Where in the wake of the artificial neural network model Backporagation algorithms using MATLAB programs, such as for this parameter is Epoch = 2000, Ir = 0.1, mc = 0.9. Data Variation 70 (training) and 30 (Tests), it is proven in testing the artificial neural network model is applied to predict water levels in 2012. So this data can be a flood early warning system in the downstream areas of the river.Keyword : neural network, the back propagation algorithm, face high water forecasting
Penelusuran Banjir (Stage Hydrograph) Menggunakan Jaringan Saraf Tiruan (Studi Kasus : DAS Siak)
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Abstract

The purpose of this research is to predict the height of water level of Siak River Sub DAS Siak Hulu Pantai Cermin Station in 2012 by using water level data recorded by Sub DAS Tapung Kiri Tandun Station in the same year. This is to search for a more convenient and accurate method in flood routing from all methods that have been applied in the hope that this research can be considered as an alternative method.This research is conducted by using backpropagation algorithm artificial neural network approach with single input and single output as network model configuration. The approach itself uses Matlab 7.8.0.347 (R2009a) as supporting program.This research shows that the results of the training, test, and validation of artificial neural network model have a fairly good level of correlation with the value of R 0.58713, 0.64818 and 0.65933 though not yet provide maximum results. The level of correlation between prediction result with actual data is 0,518.Keywords: flood routing, water level, artificial neural network, backpropagation, tapung kiri, siak hulu
Pengaruh Penambahan Semen Terhadap Kuat Geser Lempung Sebelum Dan Sesudah Penjenuhan Ali, Miftahul; Satibi, Syawal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Abstract

Soil is a material that very influential in the contruction work. Major issues in soft soil are low bearing capacity and high settlement condition. One of soil stabilitation effort is mixing PCC cement in specific content by the soil to improve shear strength. This research aims to study UCS and CBR values of mixed clay and cement at 2%, 3%, 4% and 5% content variations on soaked condition. The result showed that increasing cement content until 5% mixture raising soil dry density still optimum mouisture content decrease. While over 5% cement mixture showed contrary behavior. UCS and CBR values not influenced by soaking process.Key Words: CBR,UCS, clay, cement
Pengaturan Kecepatan Motor Arus Searah Variasi Tahanan Jangkar Dan Variasi Tahanan Medan Menggunakan Smart Relay Sandi Firman Nanda; Firdaus Firdaus; Feranita Feranita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Abstract

Speed setting plays an important role in the direct current motor, because the motor has a direct current coupling characteristic speed profitable compared to other motors. From both of these characteristics can be used as a basis to set the dc shunt motor speed. If a decline in motor speed due to the increase in load current (Ia), the field current (If) is set (reduced) so that the motor speed be maintained at the desired rotation. In the design of the most important stages of this research. In the design phase to understand the properties, characteristics, specifications of components used and the steps that must be considered by using the block diagram of DC motor supply circuit blocks, smart relay circuit blocks, block string of resistors, and a DC motor circuit blocks, each this circuit has the function block and work differently but interrelated. Based on data and analysis can then be seen that the larger the anchor resistance will decrease the speed of the motor to hold the armature and the greater the speed the greater the resistance to hold field.Keyword : Dc motor speed settings using smart relay
Rancang Bangun Perbaikan Faktor Daya Otomatis Berbasis Smart Relay Pada Jaringan Tegangan Rendah Tiga Fasa Ade Chandra Saputra; Suwitno Suwitno; Amir Hamzah
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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Power factor is one of the problems in the electric power quality improvement. Power factor value that is too low can result in some electrical equipment can not operate properly. In many ways, low power factor need not cost cheap. To assist in the use of power factor correction capacitor banks to provide reactive power in the system. To improve the power factor is low, then the study will be compensated automatically by using smart relay as a switch to the capacitor bank. Cosphi great start on system is 0,26 lag with the addition of 2,08-33 μF capacitor to cosphi be 0.99 Lag.Keywords: Capacitor Bank, Smart Relay, Power Facto

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