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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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Sistem Kontrol Dan Monitoring Suhu Dan Kelembaban Udara Pada Fermentasi Tempe Menggunakan Modul ESP8266 Dengan Platform Iot Fitri Wulandari; Ery Safrianti; Linna Oktaviana Sari
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

One of traditional foods of Indonesian people is tempe. Tempe is made from fermented soybeans with Rhizopus Oligosporus mold. In its production, producers’ tempe often fail. One of them is Harber Tempe Factory, located in Pelita Street, Pekanbaru City. Beside weather factors, there are no supporting tools for temperature and humidity detection at the factory, also become obstacles in fermentation process of tempe. Producers’ tempe do not know exactly how much temperature and humidity must be maintained for fermentation process. Manufacturers only can estimate temperature and humidity in fermentation room. If temperature is considered too hot, producers’ tempe will come to factory and open air pentilation. So, the room temperature is back to normal because house of producer’s tempe and tempe factory are separate.Tools used in this study are ESP8266 Module, DHT22, Relay, Power Bank as power, fan and battery. Internet of Things (IoT) is a concept where objects in physical form can be connected and can transfer data through internet network by sensors. The concept of IoT describes every object that can be connected to internet and can be controlled remotely without having to be in that place. With IoT, job will be made faster and easier. The results obtained from the test are if temperature and humidity are above or below of normal temperature (250C-320C), a notification will appear on user's smartphone via Blynk application. If temperature is too hot, fan will turn on automatically. If temperature is too cold, light will turn on. Monitoring data can be viewed on thingspeak in graphical form. Keywords: Monitoring, Blynk, Thingspeak, ESP8266,Internet of Things
Analisis Kebutuhan Kapasitor Bank Untuk Memperbaiki Faktor Daya Pada Gardu Induk Garuda Sakti 150 KV Anto, Anto; Zakri, Azriyenni Azhari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
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Abstract

Along with the growth of society and the improvement of technology, the need for electric power continues to increase. However, the development of the electric power system is not sufficient to supply the required electrical energy needs. For this reason, it is necessary to regulate and manage a good electricity distribution system so that the current growing needs of the community are met and have high reliability. Installation failure in the electric power system cannot be avoided because the distance between the generator and the substation is very far, this causes the voltage on the receiving side to decrease. To increase the voltage and power factor it is necessary to install a capacitor bank. Capacitor bank installed in parallel to the substation load. The results of research and simulation of Matlab Simulink capacitor bank condition 2 × 25 MVAr with output voltage is 146 kV, current is 470 A and power factor is 0.93 lagging. After analyzing the need for a capacitor bank to achieve a lagging factor value of 0.95. the method used is the method of calculating the need for a capacitor bank to increase the power factor to 0.95 lagging. After the calculation method is carried out, the capacitor bank capacity is 15 MVAr. The simulation results with Matlab Simulink R2016a output voltage is 150 kV, current is 4500 A and power factor is 0.94 lagging.         Keywords: Electric Power System, Capacitor Bank, Matlab Simulink R2016a.
Analisis Koefisien Rezim Aliran (Kra) Berdasarkan Permenhut No: P.61/2014 (Studi Kasus: Sub Das Batang Sinamar, Sub Das Batang Ombilin Dan Sub Das Lubuk Ambacang) Sutopo Sutopo; Yohanna Lilis H; Bambang Sujatmoko
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Activities to determine the development of satisfaction, quality, and continuity of water flow from watersheds / sub-watersheds, namely by monitoring and evaluating water systems, one of the monitoringand evaluation of water systems using KRS (River Regime Coefficient) Based on Permenhut No: P.61 / 2014 conducted in Sub Batang Sinamar watershed, Batang Ombilin watershed and Lubuk Ambacangwatershed. This watershed was chosen because in this area floods occur every year. The data used are Indragiri Hulu watershed map data and discharge data to analyze the KRA value. The results of KRAanalysis in the Batang Sinamar Sub-watershed from 2010 to 2018 amounted to 35.40 included in the classification of "Low" with a score of 0.75, the results of the KRA analysis on the Batang Ombilin Subwatershed in 2009 to 2018 amounted to 248.20 included in the classification of "Very High" with a score of 1.5 and the results of the analysis of the KRA analysis in the Lubuk Ambacang Sub-watershed in 2009 to 2018 amounted to 35.56 included in the classification of "Low" with a score of 0.75.Keywords : water management monitoring, flow regime coefficient, indragiri watershed
Analisis Timbulan Sampah Domestik Di Kota Dumai Rifad Andrian Saragih; Jecky Asmura; Aryo Sasmita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Dumai City has an administrative area of 1,727.38 km2, consisting of 7 districts, namely Dumai Kota, Dumai Timur, Dumai Barat, Dumai Selatan, Bukit Kapur, Medang Kampai, Sungai Sembilan. In 2018 the population density was 176 people / km2 and the population growth rate was 2.74%. With a population of 303,292 people, the city of Dumai has the potential to produce large amounts of waste, which if not managed properly can cause a decrease in the quality and aesthetics of the environment. Therefore it is necessary to calculate the generation of waste as a basis for waste management in the city of Dumai. The calculation of waste generation that is carried out refers to SNI 19-3964-1995, the unit of large city waste generation = 2 - 2.5 L / person / day, or = 0.4 - 0.5 kg / person / day, the unit of waste generation medium / small city = 1.5 - 2 L / person / day, or = 0.3 - 0.4 kg / person / day. Based on the results of the calculation of waste generation, dumai city is included in the category of medium cities, it is found that the waste generation is 606,5 m3 / day. Key words: dumai city, waste generation, domestic waste.
Desain Reaktor Dehidrogenasi Pada Praprancangan Pabrik Linier Alkil Benzen (LAB) Dari Benzen Dengan Proses Uop/Cepsa (Detal Process) Khalya Fathonah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

Linear Alkyl Benzene (LAB) is one of the organic chemicals in the form of clear liquids with the formula of mokelul C6H5CnH2n+1. LAB is used as raw material in detergent industry. LAB is chosen because it has a high rate of degradation so it is environmentally friendly (biodegradable). In 1995, UOP/CEPSA introduced a method of creating LAB using solid catalysts, called Detal Process. Due to higher yields, product quality and lower production costs, this process is considered better. Lab factory design capacity is 80,000 tons/year with the flow rate of incoming feeds and products of 4,5243.298 kg/h, in order to meet the needs of LAB in Indonesia which is 20% still exporting from abroad. One of the main tools used to produce LAB is a dehydrogenation reactor with a type of fixed bed multi-tube that serves to convert di-olefin into mono-olefin. The process is carried out at a temperature of 450oC and a pressure of 300 kPa (abs) with the help of platinum catalysts (Pt) in the liquid phase. The conversion rate of the reaction is 18% and the product is a mixture of mono-olefin, di-olefin, aromatic, hydrogen and paraffin. The type of reactor used is fixed bed multi-tube with lid and base elliptical head, and the buffer in the form of skirt support. The reactor is designed with a height of 9.76 m and a diameter of 6.08 m. In addition, the dehydrogenation reactor is equipped with steam as its internal heater.Keywords : Dehydrogenation, Elliptical Head, Fixed Bed Multitube, Linear Alkyl Benzene, Platina Catalyst
Pengaruh Tekanan Operasi Membran Dalam Pengolahan Air Limbah Pulp Dan Kertas Eufransia, Lamria; Pinem, Jhon Armedi; Amri, Idral
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Membrane technology is an effective technology to purify wastewater. The objective of the research is to determine the performance of the ultrafiltration for removal of BOD5, COD and TSS from wastewater of pulp and paper industry. This research has been conducted on wastewater treatment of pulp and paper industry with ultrafiltration process using poly aluminium chloride as a coagulant. Wastewater purified by ultrafiltration membranes with a variation of operating pressure 1.0 bar; 2.0 bar; and 3,0 bar. The result show that ultrafiltration process removed 78,93% of  BOD5; 84,22% of COD; and 88,64% of TSS with flux value of 65,95 L/m2.jam at 3,0 bar. Keywords: Pulp and paper wastewater, poly aluminum chloride,rejection, ultrafiltration
Produksi Enzim Lakase Oleh Jamur Trichoderma Asperelloides LBKURCC2 Menggunakan Substrat Jerami Padi Secara Fermentasi Kultur Padat Dengan Variasi Waktu Fermentasi Dan Laju Aerasi 1,5 L/M Iwara, Bangkit Swadi; Helianty, Sri; Dahliaty, Andi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Laccase (benzenediol:oxygen oxidoreductase, EC 1.10.3.2) is classified as blue copper oxidase enzyme. Laccase generally found in plant, insect, bacteria and filamentous fungus. One of filamentous fungus that able to degradates lignin is Trichoderma. Lignin is available in biomass such as rice straw, that contains around 18% lignin. The technique of producing laccase enzymes in this study is solid state fermentation. Solid state fermentation allows microorganisms to grow in conditions close to or similar to their natural habitat, with relatively better product than submerged state fermentation. In this study, the effect of giving force aeration on variations in fermentation time was studied in order to obtain optimum conditions for the production of laccase enzyme by solid state fermentation using the fungus Trichoderma asperelloides LBKURCC2 with rice straw substrate on a tray bioreactor. The fermentation is carried out with variation of the fermentation time 6, 8, and 10 days with incubation temperature of 30 ± 2 ºC, acetate buffer solution pH 5.5 (0.05 M), substrate size 1 cm, addition of 0.5 g / l CuSO4.7H2O inducer, bed height 3 cm, and aeration rate 1.5 l / m. The highest laccase enzyme activity was obtained during the production time of 8 days, with an average 7.78 x 10-6 U / L. The 8th day is considered to be the best growth time where the enzyme activity has reached its peak and is in a stagnant condition after the increase that occurred on the 6th and 7th days. Meanwhile, on the 9th and 10th days there was a significant decrease in the activity of the laccase enzyme due to the greater repression of catabolites.Keywords: Laccase, Solid State Fermentation, Tray Bioreactor, Force Aeration, FermentationTime
Musical Opera Theatre Of Siak Dengan Penerapan Prinsip Desain Renzo Piano Fadhil, Iman; Faisal, Gun; Aldy, Pedia
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Siak Sri Indrapura is a city rich in diversity of tradition, arts and traditional knowledge, this can be seen from the attractiveness of local traditions that have the potential as tourist attractions and also plays a major role in executing arts events and performances in Riau Province. Musical Opera Theater of Siak is a place for art activities with cultural values that also functions as a space for interaction of community and information activities, so it will support the development of community interests and talents in performing arts. By using Renzo Piano’s design principles, it is able to create a connection between performing arts through architecture and the use of surrounding environment and culture in the city of Siak. With Audiosonic Wave as the concept and being transformed by Renzo Piano’s design principle, this building has architectural qualities that can enhance creativity and ideas about performing arts through architectural elements. Keyword: Musical Opera Theatre, Art
Sintesis Nanokitosan Dengan Metode Gelasi Ionik Menggunakan Pelarut Asam Asetat Dengan Variasi Konsentrasi Kitosan Qonitannisa, Shofi; Fadli, Ahmad; Sunarno, Sunarno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Nanochitosan research continues to be developed using easy and simple methods. The content of chitosan in shrimp shells is used as raw material for the synthesis of nanochitosan. The purpose of this study was to determine the effect of variations in the concentration of chitosan on the size of the nanochitosan produced using the Particle Size Analyzer (PSA) analysis method. The research was carried out through several stages including preparation of raw materials, manufacturing of chitosan, preparation of nanochitosan using the ionic gelation method and characterization of nanochitosan. The procedure for making nanochitosan is to make 1% acetic acid solution and 0.1% natrium tripolyphosphate (NaTPP). Chitosan solution with a concentration of 0.1% and 0.3% was stirred using a magnetic stirrer. After 15 minutes NaTPP solution added at a volume ratio of chitosan and NaTPP was 7:1. Stirring continuously for 1 hour at 1200 rpm. Furthermore, the characterization was carried out on the nanochitosan. The deacetylation degree of chitosan from dried shrimp industrial waste in the results of this study has met the quality standard of chitosan, namely 76.3%. The results of the research that have been carried out obtained the size of chitosan nanoparticles of 852.1 nm and 2591.4 nm. The polydispersity index of each concentration results 0.353 and 0.741. The higher chitosan concentration used, the higher of nanoparticle size and the polydispersity index results. Keywords: acetic acid, degree of deacetylation, ionic gelation, nanochitosan, natrium tripolyphosphate
Prarancangan Pabrik Mtbe (Metil Tertiari Butil Eter) Dari Metanol Dengan Disain Alat Utama Reaktor MTBE (R-101) Pranoto, Monica Kartiningtyas; Amraini, Said Zul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
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Abstract

There are more motorized vehicles in Indonesia in line with the increasing demand for fuel. This development will have a negative impact, environmental pollution so MTBE is a substances with a lower risk and environmentally friendly are chosen. The target market of this factory is to meet the need for MTBE in Indonesia and to export it to the Asia Pacific region. MTBE production process is carried out by reacting methanol with isobuten with a capacity is 280,000 tons/year. The MTBE reactor serves as a place for reacting methanoland isobuten to produce MTBE. The reactor is fixed bed multi tube type which has 109 tubes with Torisperical flanged dished head. Reactor operating temperature is 60ºC, pressure is 6 bar and using Amberlyst 15 as catalyst. The height of the reactor is 26.3 ft and diameter is 4.5 ft. The reaction is exothermic, so the principle of the reactor is like a shell and tube heat exchanger with cooling water flow of 1,070,054 lb/hour. The value of FixedCapital Investment is $ 39,009,534. The value of the Working Capital Investment is obtained 15% of the Total Capital Investment (TCI) or worth $ 6,884,035 so that the TCI is $ 45,893,569. The total production cost is $ 349,777,652 so that it will generate a grossprofit as $ 220,011,513 after deducting 35% tax. ROI after tax is 88%, BEP is 50% and Pay out time for 1 year with a Shut Down Point is 0.23%. This factory has an IRR that is 22.76% which is greater than the RRR of a bank which is 22.55%, then the value of NPV is $ 90,140,564 which is greater than the TCI. From these two factors, it can be concluded that the MTBE plant is feasible to build.Keyword: Isobutene, Methanol, methyl tert butyl ether, reactor fixed bed multi tube

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