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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Articles 3,145 Documents
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Akit Cultural Centre Di Pekanbaru Dengan Pendekatan Arsitektur Kontemporer Sebagai Landasan Mohamad Rafsanjani; Gun Faisal; Yohannes Firzal
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The Akit tribe is one of the indigenous tribes of Riau Province that is rich in culture. Hamidy (1991) states that the Akit tribe is included in one of the six isolated tribes in Riau Province. The entry of transmigration from various regions in Indonesia made the Akit tribe's culture and architecture increasingly marginalized and lost. Then an effort was made to resolve this problem by carrying out the design of Akit Cultural Centre located in Pekanbaru City.Akit Cultural Centre is a means to accommodate the Akit ethnic culture which will be presented to the wider community, especially the people of Riau. Akit Cultural Centre is designed to be able to provide information, knowledge, education, training and learning in form, combining the culture of the Akit tribe with Contemporary Architecture.Contemporary architecture is an architecture whose buildings are designed by following a building that is developing in its time or commonly called the present building, so that it presents buildings that can present culture well and interesting forms so that it brings the wider community, especially the younger generation, to revive the existence of the Akit tribe culture.To present a contemporary cultural center, this design goes through processes such as the analysis and application of the theme of Contemporary Architecture which involves many aspects to present the Akit Cultural Center that can solve this problem.Keywords: Cultural Centre, Akit tribe, Contemporary Architecture.
Kaji Eksperimental Cyclone Separator Pada System Pneumatic Conveying Dengan Variasi Partikel Padat Martinus Rudy Irwanto Sihotang; Asral Asral
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Cyclone Separator is a device that uses the principle of centrifugal force and low pressure due to turnaround to separate material based on different types and sizes. The phenomenon of arising in the cyclone separator installed in suction or press: collection efficiency decline marked by the large number of dust particles is wasted/fluttering giving rise to pollution of the surrounding area of the factory, the pressure drop It may cause loss of energy. This problem can affect the results and costs of production. This research aims to know the characteristics of the incoming velocity and mass flow rate of dust particles towards efficiency and a decrease in the pressure of the cyclone suction and press. By selecting the test type cyclone dust types vary the swift, the inflow velocity and mass flow rate of the cyclone dust. Testing takes place at room temperature. The test results provide that increased pressure drop in the inflow velocity and mass flow rate of the dust increases. Cyclone efficiency is increased when the density (mass flow rate of the increase in dust) and high flow cyclone mounted on suction position. On the contrary position press the efficiency decreases at a speed the flow of incoming cyclones enlarged. So the cyclone separator mounted suction more profitable than farmed ingredients press.KeyWords: Cyclone Separator, Particulate Matter, Efficiency Cyclone
Efek Penambahan Abu Serbuk Kayu Pada Lempung Plastisitas Tinggi Yang Distabilisasi Dengan Kapur Dan Semen M Faizal Alridho; Soewignjo Agus Nugroho; Ferry Fatnanta
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Deposits of high plasticity clays are lay in several locations in Pekanbaru such as Muara Fajar and Minas, Since higher clay plasticity found, soil strength will be reduced when its directly face offto water. Lime has a long time used as a material to reduce soil plasticity, as well as cement. Several types of ash (rice husk ash, fly ash etc.) have also been widely used to improve physical and mechanical properties of clay. Lot of sawing waste are located on the suburb of Pekanbaru city. Theexistence of waste will become a problem in the future. The wood ash was combined with lime and cement. This research was carried out by creating samples, with combining variation of lime and wood ash with clay's that contain 5% cement. Samples for CBR and UCS tests, were carried out withand without curing and soaking. Treatment of specimens was taken of 28 days for curing and 4 days for soaking of each test. The expansion of samples was observed to see swelling of each mixturevariation. This study aims to observe the addition of wood ash to behavior of plasticity, Unconfined Compressive Strength (UCS), Bearing Capacity and Swelling Potential of high plasticity clay. Research shows that for Muara Fajar clay's, by adding cement, lime, and wood ash gradually to the clay, value of plasticity index change from high plasticity clay to high plasticity silt. The maximum value of UCS and CBR occurs on mixture of 90% clay + 10% lime. The curing and soaking treatment also affect to the value of UCS and CBR test. The highest value of UCS and CBR was found in samples in curing of 28 days. The potential swelling pressure of each sample is only 3 kPa.Keywords: Cement, High Plasticity, Lime, Stabilization, Wood Ash
Sifat Fisik Bata Beton Dengan Penambahan Styrofoam Herol, Herol; Djauhari, Zulfikar; Ismeddyanto, Ismeddiyanto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Indonesia is a country with a high seismic activity. Due to this reason, constructions in Indonesia must pay attention to every aspect, including the design, the construction process and materials. The use of concrete bricks on the wall has an impact on the loading of a structure. This research aimed to determine the effect of addition of styrofoam to the weight, density, water absorption and porosity of the concrete bricks. In this study, the composition of the mixture used was 1 cement : 3 sand with the variations of styrofoam as a substitute for sand at 0%, 5%, 10% and 15%. Test results showed that the average weight of concrete brick with 0% of styrofoam was 2.42 gr/cm3, 5% of styrofoam was 2,31 gr/cm3, 10% of Styrofoam was 2.29 gr/cm3, and 15% of styrofoam was 2.22 gr/cm3. The porosity of the concrete brick with 0% of styrofoam was 7.89%, 5% of styrofoam was 7.66%, 10% of styrofoam was 6.81%, and 15% of styrofoam was 4.62%. From water absorption test, the results showed that the average value of concrete brick with 0% of styrofoam was 3.70%, 5% of styrofoam was 3.63%, 10% of styrofoam was 3.34%, and 15% of styrofoam was 2.32%. The more styrofoam is added, the more the weight and density of the concrete was decreasing. The porosity and water absorption values of the concrete bricks was decreasing with the addition of styrofoam due to the waterproof property of styrofoam. The result of water absorption test showed that all concrete bricks tested were concrete bricks with quality I, that are concrete brick used for load bearing construction and are commonly used for unprotected construction (outside the roof) because of having a water absorption value smaller than 25%. Keywords: Concrete brick, styrofoam, weight, density, water absorption, porosity
Proteksi Katodik Dengan Menggunakan Anoda Korban Pada Struktur Baja Karbon Untuk Mengendalikan Laju Korosi Ian Desi Rosalina Situmeang; Komalasari Komalasari; Evelyn Evelyn
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Pipes that are on land or at sea are generally made of steel which is susceptible to corrosion by the environment. The absence of control of the corrosion system metal structures directly related to the environment will be susceptible to corrosion. Prevention of corrosion in water and in the soil can use the principle of cathodic protection. Cathodic protection is a metal surface protection system by passing adequate direct current to the metal surface and converting all anode areas on the metal surface into cathodic regions. This research aims to study the effect of cathodic protection in controlling the corrosion rate of carbon steel, determine the best immersion time between the cathode and anode and choose the type of anode in its use to protect corrosion. The sample material used are low carbon steel with aluminum and zinc sacrificial anodes. The test solution used was a solution of Sodium Chloride with a concentration of 25,000 ppm then carried out by varying the immersion time of the anode and the cathode which were 10 days, 20 days, and 30 days with the distance of the anode to the cathode which was 3 cm. The results of the study using aluminum and zinc sacrificial anodes obtained the best results with a immersion time of 10 days where the corrosion rate of carbon steel protected by aluminum sacrificial anode was 1.596 mpy with an efficiency of 58.182% while the corrosion rate of carbon steel protected by anodes zinc sacrifice of 2.706 mpy with an efficiency of 29.091%.Keywords: carbon steel, cathodic protection, corrosion rate, electrode, sacrificial anode
Pengaruh Kecepatan Dan Waktu Pengadukan Dalam Pengolahan Air Gambut Menggunakan Serbuk Biji Asam Jawa (Tamarindus Indica L) Sebagai Biokoagulan Asward, Mayshara; Elystia, Shinta; Yenie, Elvi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Peat water has potential as a source of raw water because of its considerable availability, but the characteristics of peat water have not standard of quality according to Permenkes No.416/MENKES/PER/IX/1990 and PP. 82 of 2001. One method of peat water treatment is coagulation flocculation that requires coagulant. Tamarind seed powder is one type of natural coagulant substitute chemical coagulant because it contains tannin, natural polymer such as starch, sap, and albuminoid that play a role in water purification. This research used coagulation and flocculation method with combination of stirring variation 100 rpm / 40 rpm; 125 rpm/45 rpm; 150 rpm/50 rpm and 10 minutes flocculation time; 20 minutes; 30 minutes using Tamarind seed powder with 200 mesh particle size and dose 2,5 gr/200 mL peat water to the decrease COD, dyestuff, organic matter, TSS, and pH. In this study also conducted pH conditioning at peat water pH and pH condition 7. The results showed that peat water treatment at fast rapping speed 125 rpm, slow stirring speed 45 rpm and slow stirring time 20 minutes at natural pH condition of peat water (4,69) using Tamarind seed powder have the best effect on water quality parameter and able to increase water pH. Decrease in COD by 75.90%; dye of 84.59%; organic matter 72,12%; and TSS of 81.70% and peak water pH to 6,8. Keywords : Coagulation Flocculation, Peat Water, Stirring Times, Flocculation Times, Tamarind Seed Powder
Kinetika Adsorpsi Total Dissolved Solid (TDS) Dari Limbah Cair Sisa Pengeboran PT. CPI Duri-Riau Pada Karbon Aktif Ristandi, Ristandi; Azis, Yelmida; Alfarisi, Cory
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

The handling of residual drilling liquid waste is one of the milestones of the upstream oil industry, one of which is PT. CPI in the Duri Area. To improve the existing process, a study is needed, one of which is by reviewing the adsorption process used in the processing. In this research, the absorption of total dissolved solids with adsorbent using activated carbon was carried out, with variations in pH (4, 7, 10), stirring speed (100 rpm, 150 rpm, 200 rpm), and types of activated carbon (granules and powders), and also adsorption kinetics tests with pseudo-first order model, pseudo-second order model, Elovich model, and intraparticle diffusion model. The results show that the type of Granular Activated Carbon (GAC) is better with the best absorption capacity of 176.5 mg / g, the speed of 100 rpm and pH 4 can increase the efficiency of TDS adsorption up to 47.07%, and the results of adsorption kinetics from residual drilling waste PT. CPI-Duri using activated carbon follows the pseudo-second kinetic order, with the equilibrium model t/Qt = 0.0045t + 0,0704.Keywords: kinetics, adsorption, activated carbon, residual drilling liquid waste, total dissolved solid (TDS)
Pengaruh Rasio C:N Dan Panjang Gelombang Cahaya Terhadap Peningkatan Kandungan Karbohidrat Chlorella SP Dengan Memanfaatkan Limbah Cair Hotel Sri Indira Puspa Pertiwi; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Carbohydrate content in microalgae can be used as raw material for producing biofuels. Microalgae need nutrients such as carbon and nitrogen also light for their growth. Nutrient source can be obtained from wastewater, such like hotel wastewater. The objective of this study was to determine the best condition for Chlorella sp producing high carbohydrate content by varying the C:N ratio 100:7, 100:13, 100:32 and the light wavelength using a white light color (380-750 nm), blue (450-495 nm), green (495-570 nm), and red (620-750 nm). The experiment was conducted at room temperature under 2000 lux illumination for 15 days. The results showed that Chlorella sp produced the highest carbohydrate content (45,77 mg/l) under C:N ratio 100:7. Moreover, when algae was cultivated under different light wavelength showed that Chlorella sp has grown better and produced more carbohydrate content (48,39 mg/l) under blue light (450-495 nm) when compared to the other types of light. Keywords: Chlorella sp, carbohydrate, C:N ratio, light wavelength
Performa Kompor Gasifikasi Champion Stove Retna Julita; David Andrio; Hari Rionaldo; Zulfansyah Zulfansyah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Energy requirements for household cooking needs still depend on LPG (Liquefied Petroleum Gas). However, the lack of LPG supply and poor distribution are still obstacles in the community. Biomass waste is one of the alternative fuels for society so that cooking energy needs can be met. The objective of research is to study the effect of type of biomass and biomass size on the performance of gasification stoves by using a water boiling test (WBT) analysis. The experiments were carried out in batches with two WBT phases, namely cold start and hot start. The first stage was a cold start, where the tester uses a stove at room temperature an a number of fuels to boil 2.5 liters of water in a standard pan. The second stage was called the hot start test, where water is boiled with a hot stove with the aim of identifying the difference in the stove’s power when it’s cold and when it’s hot. In addition, the flame temperature and stove operating time are the performance parameters of the stove champion gasification stove. Water content for each biomass used is between 10-13%. The resulting flame color is reddish yellow with a fire height of 30-72 cm. The maximum flame temperature produced by the stove is 806,3 oC using mahogany wood. Key words: biomass gasification, gasification stove, water boiling test (WBT).
Desain Metode Proteksi Katodik Dengan Arus Paksa ( Impressed Current ) Pada Pipa Dermaga Sufrianti, Jusni; Hamzah, Amir
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Impressed Current Cathodic Protection (ICCP) is protection by giving electrons to the pipe material using a source of electric current from outside the system. In this article the design of cathodic protection using the impressed current method on the pier pipe contained in PERTAMINA Dumai's RU 2 is to protect 12 m long pipes in the water with a total protection current of 528 A, the result of analysis producing a rectifier specification for the design, = 19,95 V goes to Junction Box 1( pier pipes connected to junction box 1) and = 18,07 towards Junction Box 2 ( pier pipes connected to junction box 2 ), = 22,17 V on transformer 1 ( electrical supply for junction box 1 ), and = 20,08 Von transformer 2 ( electrical supply for junction box 2 ), = 475,12 A and Rectifer Power Capacity = 104,528 kVA, and the anode needed 67 Mixel Metal Anode (MMO). Keywords: PLTSa, Incenerator, Feasibility Analysis, Technical Economics

Page 141 of 315 | Total Record : 3145

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