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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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Pengaruh Indeks Plastisitas Tanah Terhadap Koefisien Konsolidasi Vertikal (Cv) Dan Horizontal (Ch) Fauzan Hidayattullah; Ferry Fatnanta; M. Yusa
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

Soft soils have instability problems that cannot be tolerated, so when a construction is to be built, the soft soil has to go through several methods of soil repair. One of them is by giving a load above the ground to increase the pressure of pore water in the soil, so that the water that fills the pore space on the ground out so that it causes the volume of pores in the soil to shrink and is also followed by a settlement in soil, this event is called consolidation. Generally consolidation occurs only in the vertical direction (cv), while in this study horizontal direction consolidation (ch) was obtained by modifying the consolidation test by using a membrane to limit the movement of pore water when compressed by the load so that the water moves radially towards the vertical hole containing the sand that has been prepared. This study aims to analyze between vertical consolidation coefficient (cv) and horizontal consolidation coefficient (ch) which is associated with the physical properties of soil namely soil plasticity index through laboratory tests. Therefore, it is necessary to vary soil samples that have diverse physical properties of soil, soil sample variation is obtained by mixing two types of soils that have different soil classifications using weight percentages of 0%, 25%, 50%, 75% and 100%. The results of this study showed soil samples that had a high plasticity index resulted in a greater value of vertical consolidation coefficient (cv) and horizontal consolidation (ch) compared to soil samples that had low plasticity index values. It is also related to the consolidation testing method which has differences in flow length and physical properties of soil samples such as moisture content (w), type weight (Gs) and initial pore number (eo) which affect to time of settlement. Keywords : Soft, soil, Consolidation, Vertical drain, Physical properties, Atterberg limit, Plasticity Index
Prarancangan Pabrik MTBE (Metil Tertiary Butil Eter) Dari Metanol Dengan Disain Alat Utama Menara Destilasi Pemisahan Metanol Dan TBA (T-102) Zikir Akbar Kemala; Said Zul Amraini
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

The increasing number of motorized vehicles is not matched by proper waste emission processing, which has a negative impact on the environment in the form of air pollution. This is a result of the incomplete combustion process so that the number of pollutants produced is increasing. One way to reduce the occurrence of incomplete combustion is by increasing the value of the octane number in motor vehicle fuel oil with additives that can increase the octane number such as methyl tert butyl ether (MTBE). MTBE production process is carried out by reacting the feed in the form of methanol with isobutene and the obtained production capacity is 180,000 tons / year. In the design of the distillation tower for the separation of methanol and Tertiary Butyl alcohol (TBA), the feed temperature, tower top and bottom of the tower were 333 K, 298 K and 328 K. The feed, distillate and bottom flow rates were 11,858 kg / hour, 10,644 kg, respectively. / hour and 1,214 kg / hour. The tower diameter is 2.27 m, with a spacing tray of 0.45 m, and the number of trays (without a reboiler) is 28. The type of flow that occurs inside the tower is a double pass with a total tower height of 13.77 m. The main equipment required is one reactor (fixed multitubular), one mixer (paddle), four for the distillation unit (sieve tray), three Heat Exchangers (one double pipe and two shell and tube), two heaters (shell and tube). , two coolers (double pipe), three centrifugal pumps, and five storage tanks (methanol, isobutene, MTBE, Butane and Water). 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, tertiary butyl alcohol, total capital investment
Prototype Pemilihan Dan Penggabungan Sumber Daya Secara Adaptif Ibnu Hafizh; Nurhalim Nurhalim
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

This research discusses about the design and laboratory experiments for a module of prototype of hybrid system with three dc sources connected parallelly such as solar panels, windmills and waterwheels. This module is an important part of saving electricity consumption by using solar panels, windmills and waterwheels. It will receive power input from 3 sources, namely waterwheels, solar panels and windmills. It is shown that the simulation process and laboratory experiments can be drawn from several conclusions that this module can work in accordance with the desired conditions which can save electricity usage. Various dc voltage sources can be combined by supporting of contactor relays. The size of the dc voltage affects the power consumption from the source. Based on the prototype, the system implemented can increase the electricity consumption without PLN electricity. Keywords: hybrid system, dc voltage, relay contactor.
Pemanfaatan Limbah Spent Bleaching Earth (SBE) Sebagai Bahan Baku Pembuatan Briket Siti Aisyah Sukma; Elvi Yenie; David Andrio
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

The need for energy is continuously increasing and the availability of fuel is depleting, the necessary to save energy source. Saving can be through the use of fuel or energy sourced from renewable energy. Therefore, it is necessary to conduct research to obtain alternative fuels that can be renewed such as spent bleaching earth (SBE) waste. SBE is solid waste that comes from the bleaching of crude palm oil. The hoped that SBE solid waste can be reused so that SBE waste does not become an environmental problem because it is existence has not been optimally untilized. This research will utilize SBE waste as raw material for making briquettes with the addition of tapioca adhesive. Keywords: Briquettes, Spent Bleaching Earth, Tapioca Adhesive
Uji Nilai Kalor Oli Bekas Sepeda Motor Sebagai Bahan Bakar Mesin Diesel Dongfeng R175 Arief Rachman Widyanto; Aryo Sasmita; Yohanes Yohanes
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

The production laboratory of the Department of Mechanical Engineering Riau University, has modified the diesel engine used as a used oil fueled generator, the problem is that the emission feasibility test has not been carried out. The purpose of this study was to determine the calorific value of used motorcycle oil and compare it with dexlite and to measure this calorific value using a bomb calorimeter. Keywords: Calorific value, Diesel engine, Used motorcycle oil, Fuel.
Pengembangan Kawasan Wista Pantai Selatbaru Dengan Pendekatan Arsitektur Tepian Air Amalia Nurussifa; Wahyu Hidayat; Yohannes Firzal
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

Selatbaru Beach is one of the best beaches and a place of recreation for Bengkalis residents, this is evidenced by the number of tourists visiting Selatbaru Beach increasing every year. In Selatbaru Beach there are several problems that make the value of tourism on the beach lack of architectural touch, so from these problems came the idea to increase tourism value and economic value by developing the Selatbaru Coast tourism area. The method used is the Waterfront Architecture Approach which in principle accommodates various activities such as residential, business, commercial, and entertainment with the aim of developing the physical and non-physical potential of the waterfront, as well as providing solutions to problems and potential problems found in Selatbaru Beach. Local cultural elements need to be incorporated into the region to present a tourism area that has an identity, through the concept of "sampan jong" which is one of the game traditions of the Selatbaru people who are able to form regional images that are formulated macro and micro.Keywords : Selatbaru Beach, tourism, waterfront
Model Kesetimbangan Pada Adsorpsi Ion Logam Timbal (Pb2+) Menggunakan Hidroksiapatit Dhamala Shobita Chandra; Ahmad Fadli; Komalasari Komalasari
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

The needs for industrial wastewater treatment for heavy metal have been a concern. Adsorption using hydroxyapatite (HAp) as adsorbent is one of the choice to remove heavy metal content economically and efficiently. The objective of this research is to study the effect of temperature and weight of adsorbent in adsorption as well as determine adsorption equilibrium model in the lead ion adsorption using Langmuir, Freundlich, and Temkin model. Lead (Pb2+) solution of 5 ppm was added with 0.9 gram, 1.0 gram, and 1.2 gram of HAp in a beaker glass and stirred with stirring rate of 300 rpm and temperature variation of 30°C, 40°C, dan 50°C. Solution samples was taken every 10 minutes until equilibrium and and analyzed for the remaining Pb2+ using ICP-OES instrument. The results showed that the increase of temperature reduce the rate of Pb2+ adsorption and increased of the weight of adsorbent increase the percentage of adsorption. The equilibrium time of lead ion adsorption is 50 minutes, with optimum condition obtained on 30°C and hydroxyapatite adition 1.2 gram. Equilibrium model describes the heat of adsorption and thermodynamics parameter of adsorption process, ∆H = -0.53 kJ/mole, ∆G < 0, ∆S = -144.1406 kJ/mole). Keywords: hydroxyapatite, adsorption, adsorpsion equilibrium model, lead (Pb2+)
Pengaruh Massa Adsorben Dan Laju Pengadukan Terhadap Penyisihan FE, Warna Dan PH Air Gambut Secara Adsorpsi Dengan Adsorben Cangkang Buah Karet Sesvi Bonita. B; Edward HS; Syarfi Daud
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Water sources in peaty areas or swampy areas are generally shallow with brown water, high levels of humic acid, organic matter and iron. Rubber fruit shell is one of the organic wastes that has the potential to be used as an adsorbent because it contains quite a lot of lignin. This study aims to determine the effect of adsorbent mass and stirring rate in the adsorption process using rubber fruit shell adsorbents in peat water treatment. In peat water treatment the independent variables used in this study were the adsorbent mass of 5.5, 6.5 and 7.5 grams in 1000 ml and stirring speed of 90, 100, 110 and 120 rpm. The highest removal efficiency of Fe metal in peat water was 73.91%, with adsorbent mass of 6.5 grams and stirring speed of 90 rpm. The highest color removal efficiency was 64.87%, at a mass of 5.5 grams with a speed of 100 rpm, while for pH obtained a pH of 7.0, at a mass of 5.5 grams with a stirring speed of 90 rpm. The adsorption capacity for Fe metal was achieved at an adsorbent mass of 5.5 grams with a stirring speed of 120 rpm of 0.1732 mg/gr and the adsorption capacity for color was achieved at an adsorbent mass of 5.5 grams with the highest stirring speed of 100 rpm of 103.09 mg/gr. gr. The equation of the selected Fe adsorption isotherm is the Langmuir isotherm with an R2 value of 0.9998. Keywords: rubber fruit shell, Adsorption, Peat Water, Adsorption Capacity
Prediksi Kedalaman Muka Air Tanah Di Lahan Gambut Menggunakan Metode Regresi Di Khg Pulau Tebing Tinggi Neneng Sari Nensi; Sigit Sutikno; Yohanna Lilis Handayani
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

The forest fires that occurred in 2015 were very severe in the past 20 years. The forest fires caused a haze disaster for several months. The depth of groundwater plays an important role as a key in determining the risk of a fire occurring on peatlands. The purpose of this study is to create a hydrological model to predict the depth of the groundwater surface as a parameter for potential fires on peatlands using regression analysis. The location of the research is the village of Sungai Tohor. The data used for modeling are rainfall data and groundwater depth data that have been recorded historically on peatlands by installing SESAME at the research location and obtained data through the website address web.sesame-system.com. Regression analysis was performed using five data length scenarios, namely 1 month, 3 months, 6 months, 9 months, and 12 months to determine the period that could represent the hydrological conditions in the field. The results showed that the regression analysis with data lengths of 1 month, 3 months, 6 months, and 12 months gave the best prediction results for groundwater levels with strong correlation coefficient values of 0.80, 0.93, 0.89 and 0.94. Meanwhile, groundwater level prediction using regression analysis with 6 months length of data gives results with a moderate correlation value of 0.56.Key words: correlation value, groundwater level, peatlands, regression analysis.
Produksi Bioetanol Dari Bungkil Inti Sawit Dengan Proses Fermentasi Nur Irfana Mardiyah; Silvia Reni Yenti; Sri Rezeki Muria
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

Indonesia is a country with a growing human population, causing the need of energy also increases. Bioethanol has been widely used in transportation as a fuel that is increasingly reduced. Palm kernel expeller has a high enough potential to be developed into an alternative energy source, namely bioethanol because of its lignocellulosic content. The purpose of this study was to determine the composition of yeast in the fermentation process, and determine the optimal processing time for the formation of bioethanol in the Hydrolysis and Separate Fermentation (SHF) method. The stages in this study were the hydrolysis of palm kernel expeller using H2SO4 3M for 5 hours at 100 oC. The fermentation process is carried out with variations in time for 24 hours, 48 hours, 72 hours, 96 hours and 120 hours. The fermentation process is carried out with variations composition of yeast for 4 g/L, 6 g/L, dan 8 g/L. The results showed that in the fermentation using a sugar concentration of 22,11 g/L, obtained an optimal fermentation in 2,5 % (v/v) or 19,73 g/L at 6 g/L composition of yeast and 96 hours time on fermentation. The greater the concentration of Saccharomyces cerevisiae and the longer fermentation time, the more bioethanol is obtained. Keywords: Bioethanol, fermentation, palm kernel expeller, Saccharomyces cerevisiae,.

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