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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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Kaji Eksperimental Torsi Statik Dan Dinamik Turbin Savonius Hidrokinetik Tipe Bach Tiga Sudu Dua Stagemenggunakan Plat Pengarah Agus Saputra; Iwan Kurniawan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

hroughout human history great advances in culture have always been followed by increased energy consumption. Hydrokinetic energy can be used in Savonius turbines. The purpose of this research is to find out the static torque and dynamic torque produced from Savonius turbine type bach three blades by varying the first and second levels (15 cm: 15 cm, 17 cm: 13 cm and 20 cm: 10 cm) at the same total turbine height. The aspect ratio dimensions are 1.1, overlap ratio 0.2, rotor height (H) 0.3m, rotor diameter (D) 0.33 m, turbine diameter (d) 0.3 m, and with variations in water flow velocity ( V) 0.34 m / s and 0.51 m / s in the water tunnel. The two torques are obtained at rest (static torque) for each angle of the azimuth and moving conditions (dynamic torque) from no load and until it stops spinning. Based on the data obtained from the Savonius turbine type bach three-tiered blades using the directional blades produce α30˚: β10˚ angles on the 15/15 turbine get greater dynamic torque compared to research with turbines 17/13 or 20/13 that is equal to 0 , 3 Nm at a water velocity of 0.51 m⁄s, but compared to the results of the dynamic torque produced by the variation of the directional plate at an angle of α 30˚: β 10˚ and angle α 45˚: β 10˚ get smaller results that is 0.288 Nm and 0.252 Nm, the largest dynamic torque is 0.42 Nm and the static torque is 0, 528 Nm at a variation of 15 cm: 15 cm. From the results of the static torque, the Savonius turbine bach type three blades with variations of the directional plate at an angle of α60˚: β10˚ get a static torque greater than the variation of the directional plate at an angle of α 30˚: β 10˚, angle α 60˚: β 10˚ , which is equal to 0.3 Nm and 0.27 Nm, 0.264 Nm.Keywords: Savonius hydrokinetic turbine, guide blade, dynamic torque, static torque
Karakteristik Nades (Natural Deep Eutectic Solvents) Dewi, Yuli Piana; Zahrina, Ida; Yelmida, Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

NADES (Natural Deep Eutectic Solvents) have been widely applied as a catalyst and solvents for extraction/reaction processes. The characteristics of NADES (pH, density, viscosity, surface tension, refractive index) are very important to application of NADES. The increasing density of NADES is influenced by the length of the carbon chain in the HBD and is influenced by the temperature where the higher the temperature the density will decrease. Viscosity is inversely proportional to temperature where the higher the temperature, the viscosity of NADES will decrease. NADES from choline chloride and glycerol are more polar than NADES from choline chloride and ethylene glycol. Surface tension increases with increasing salt ratio. As for the refractive index, the measurement of the refractive index decreases with increasing temperature.Keywords: Catalyst, Characteristics, Density, NADES, Viscosity.
Analisis Pengaruh Penyekatan Kanal Terhadap Muka Air Tanah Dan Pemetaan Risiko Kebakaran Muhammad Kusairi; Sigit Sutikno; Rinaldi Rinaldi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tanjung Leban Village is a village whose majority consists of deep peatlands, reaching depths to dozens of meters. The condition of the ground water level far from the surface of the peat soil causes the peatlands to be prone to fire. Government Regulation No.57 of 2016 states that the height of the ground water level on peatlands must be maintained so as not to fall less than 40 cm below the surface of the peat. The peat restoration agency established a canal blocking program to raise and maintain the ground water table 40 cm from the ground. So how is the influence of canal blocking on ground water level and mapping the level of fire risk. Groundwater level data obtained in the field from the height of measurements using a float on a monitoring well. The analysis shows that water flow tends to flow from the land into the canal, because the water level in the land is higher than the water level in the canal. The installation of the canal raises the groundwater level 60.5 cm and affects the water level to a distance of 476 m from the canal, after that the ground water level can only be increased by rainfall and water distribution from the concession area. The highest fire risk level was in February with a percentage of 100%, while the lowest risk level was in January with a safe percentage of 1.74%, standby 1.67% and danger or hazard-prone to 96.58%. Keyword: canal blocking, ground water level, fire risk level
Efektivitas Ekstrak Daun Ketapang (Terminalia Catappa L.) Sebagai Inhibitor Korosi Pada Aluminium Dalam Larutan Basa Silaen, Fransiska Kristanti; Komalasari, Komalasari; Muria, Sri Rejeki
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Corrosion is a decrease in metal quality due to electrochemical reactions with the environment. Metals that experience a decline in quality not only involve chemical reactions but also electrochemical reactions, namely between the materials concerned with the transfer of electrons. The greater the concentration of chloride ions, the faster the corrosion process that occurs in the environment. One method of inhibiting the process of corrosion is by using a corrosion inhibitor. This study aims to determine the concentration of Terminalia catappa L. leaf extract in reducing the corrosion rate of metal, and to determine the inhibitor efficiency of Terminalia catappa L. leaf extract in reducing the rate of corrosion. This research began with the preparation of Terminalia catappa L. leaf extract using the socletation method for 12 hours with the volume ratio of ethanol solvent of aquades (1: 3). The test method in this study was the weight loss method using variations in the concentration of Terminalia catappa L leaf extract (0; 1.5; 2gr / L) with long immersion time (24, 36,48,72 hours) in a corrosive solution 0.5M NaOH. The highest corrosion rate in NaOH solution without inhibitor at 72 hours immersion time was 212.2 mpy. The results of this study showed that the greater the concentration of Terminalia catappa L leaf extract in the corrosive medium and the longer the immersion time on the aluminum plate, the smaller the corrosion rate. The highest inhibition efficiency value in the NaOH corrosion medium with a concentration of 2gr / L with a soaking time of 72 hours was 93.59%. Keywords: corrosion rate, inhibitor, terminalia catappa L leaf extract
Pengaruh Variasi Debit Udara Terhadap Efisiensi Penyisihan Cod Dalam Limbah Cair Hotel Pada Sistem Moving Bed Biofilm Reactor (MBBR) Menggunakan Chorella Sp. Aulia Masta; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Hotel wastewater contains pollutants such as COD if discharged directly the environment has a harmful effect on the environment. If not processed it will cause excessive growth of algae or aquatic plants (eutrophication). The study was conducted to determine the efficiency of waste treatment hotel in reducing the parameter of COD using the method Moving Bed Biofilm Reactor (MBBR) by utilizing Chorella sp. This research was carried out by growing biofilms on kaldness (K1) media and air injection by aerators with variations of air injection 3 L/minute ; 6 L/minute ;9 L/minute ; and control (without air injection) with processing time of 5 days. Based on the results of wastewater treatment research hotel with the MBBR method with air injection 6 L/minute, it was able to reduce the parameters of COD to below the quality standard. The highest cell density of Chorella sp. suspended and attached in a row that is 1,595 dan 1,587 (x107 cell/ml) with the density of the cell is able to reduce the COD parameter from concentration of 485,6 mg/L to 80 mg/L and efficiency of 83,53 %, so that hotel wastewater doesnot pollute the environment if it is discharged into water bodies.Keywords : COD, Kaldness (K1), Hotel Wastewater, MBBR, Chorella sp. Microalgae.
Analisis Potensi Likuifaksi Berdasarkan Data Cone Penetration Test Dengan Metode Shibata Dan Teparaksa (Studi Kasus: Sekolah Al-Azhar Pekanbaru) Herawati, Fitri; Yusa, Muhamad; Putra, Agus Ika
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Liquefaction is a condition where the ground loses the shear strength because increased pore water effect from cyclic loads (earthquake loads) very quickly and in a moment. The influence of soil characteristics, Cyclic Stress Ratio (CSR), Cyclic Resistance Ratio (CRR), Factor of Safety (FS), Liquefaction Potential Index (LPI), and settlement soil are crucial to determine the potential liquefaction.The liquefaction analysis using Cone Penetration Test (CPT) data has developed, namely from a mechanical sondir (CPTm) developed into an electrical sondir (CPTe). The calculation method used is the Shibata and Teparaksa Method (1988). The purpose of this research to compare the potential liquefaction based on the results of CPTm and CPTm which was converted to CPTe. This research data is secondary data for the results of CPTm testing taken from the results of soil testing at the time of the construction of the AlAzhar Pekanbaru School Jl. Swakarya, Pekanbaru City. According to the analysis, it can be conclude a higher liquefaction potential is obtained when using CPTm data that has been converted (CPTe). As a results it shows that the Liquefaction Potential Index (LPI) calculated based on converted CPTm data (CPTe) is dominantly greater than the LPI value based on CPTm data with a LPIm / LPIe ratio <1. Keywords: Keywords : Liquefaction, LPI, Shibata and Teparaksa (1988), Electrical Sondir,Mechanical Sondir.
Pembuatan Batu Bata Dengan Penambahan Tanah Terkontaminasi Minyak Annisa Aprilya Putri; Ahmad Fadli; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

The petroleum industry is one of the largest oil and gas companies in Indonesia. From the exploration and production of petroleum, it turns out that the petroleum industry also produces petroleum waste which can pollute the soil. For waste handling, it is necessary to have efficient and environmentally friendly petroleum processing, in the form of brick making. The purpose of this study was to study the effect of adding a mixture of oil and clay contaminated soil and the effect of drying time on the bricks obtained from the tests carried out, namely testing compressive strength, density, water absorption, and porosity. The procedure was started with weighing all materials with variations of 2 kg, 10 kg and 14 kg oil-contaminated soil (TTM), mixing oil and cement, and then stirring water until it was homogeneous. the next step has been the processed of molding the stones and then drying them for 3, 5 and 7 days and finally the burning process has been carried out. Variations were studied by differentiating the percentage composition of the soil mixture contaminated with oil and clay used. The test results from the compressive strength, density, absorption and porosity test show that the best sample for consumers is the sample with 2 Kg oil-contaminated soil on drying for 7 days while the best sample in terms of utilization is the sample with the composition of 14 Kg oil-contaminated soil.Keywords: brick, compressive strength, porosity, oil contaminated soil
Identifikasi Sistem Penyediaan Air Minum Di Kecamatan Langgam Handayani, Devi Tri; Asmura, Jecky; Sasmita, Aryo
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Drinking water is water that has gone through a processing process or without any processing that meets the requirements and can be directly drunk. The fulfillment of drinking water needs in Langgam Subdistrict, Pelalawan Regency comes from bottled water, drilled wells, tap water, river water, springs and rainwater, of which the quality and quantity of these sources are not guaranteed. The need for drinking water in Langgam District is calculated based on population projections for the next 20 years with raw water coming from the river using three methods and the Least Square Method chosen. From the calculation of the prediction, the population in Langgam District in 2038 will reach 65,719 people, where in the planning, all residents will be served drinking water with a house connection type. The total average water requirement in Langgam District is 180.31 L / second, the maximum water requirement is 138.6 L / second and the peak hour water requirement is 188.9 L / second. Keywords: Langgam, Water Needs, River
Perancangan Pabrik MTBE ( Metil Tertiari Butil Eter ) Dari Metanol Dengan Desain Alat Utama Menara Distilasi Metanol Recovery Tower Atsarina, Aufa Zakya; Amraini, Said Zul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

Human life will not be separated from vehicles as a medium of transportation that makes it easier to move from one place to another. Until now, oil is the largest percentage of vehicle fuel providers. One of the important components in fuel from petroleum is additives. The addition of additives can produce fuel with a higher octane function as a booster, and also enhances the combustion of fuel by the vehicle engine. The type of additive used in most countries is methyl tert butyl ether (MTBE). MTBE is produced from a catalytic reaction that occurs between methanol and isobutene which will be produced with a capacity of 280,000 tons / year. One of the supporting tools for producing MTBE is a distillation tower, namely the methanol recovery tower.This distillation tower will separate the methanol that is still mixed with water from the previous operation unit so that the methanol can be recovered. Distillation tower is designed with feed, distillate and bottom temperatures of 357 K, 329 K and 372 K and feed, distillate and bottom flow rates of 14,207 kg / hour, 11,812 kg / hour and 2394 kg / hour. The results of the design obtained the distillation tower diameter and height of 5.28 m and 17.86 m with the number of trays is 35 pieces. The overall process to produce MTBE requires one fixed bed multitubular reactor, one mixer, four distillation units, three heat exchangers (one double pipe type and two shell and tube types), 2 heaters units (shell and tube), 2 coolers (double pipe), 3 centrifugal pumps with 5 storage tanks. The amount of Fixed Capital Investment (FCI) is $ 39,009,534. The amount of Direct Cost (DC) is $ 17,571,862 and Indirect Cost (IC) is $ 21,437,671. The Working Capital Investment (WCI) fee is $ 6,884,035 and the Total Capital Investment (TCI) fee is $ 45,893,569. The value of the Break Even Point (BEP) is 50%. The amount of Return On Investment (ROI) is 52%, Pay Out Time (POT) is 1.5 years, Shut Down Point (SDP) is 0.1% and the Internal Rate of Return (IRR) is 22.76%. The most sensitive factors that can affect the feasibility of this project are the selling price of the product and the volume of production. So that based on the analysis that has been done, it can be concluded that the factory is feasible to build. Keywords: Methyl Tert Butyl Ether, Methanol, Net Profit After Tax.
Optimalisasi Jaringan Menggunakan Teknik Load Balancing Metode Peer Connection Classifier (Studi Kasus: Dinas Perpustakaan Dan Kearsipan Provinsi Riau) Satiarini, Astri; Safrianti, Ery; Sari, Linna Oktaviana
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Internet is a necessity for the current era. The number of requests for internet access cause long response time and overload. Especially in offices that provide public services such as the Department of Library and Archives in Riau Province. To keep service work at the Soeman HS Regional Library not interrupted, so it will give comfortable for visitors, network optimization will be carried out with Load Balancing Technique. Load Balancing will balance load traffic on two or more connection lines, so that traffic can run optimally. The method used is Peer Connection Classifier, whereas this method will divide load based on sources, destination addresses and port addresses. All internet requests from users will go to Router that has been configured with PCC method, so on the Router will set up the exit request from user through ISP 1 line or ISP 2 line to be able to go to internet connections. The test results show that the equal distribution of outgoing access to ISP 1 and ISP 2 lines in a balanced manner, so there is no overload in any of ISP lines. The configuration will be applied in the Mikrotik Router using the Winbox application. Keywords : Load Balancing, Optimization, Peer Connection Classifier, Failover, ISP Lines.

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