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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Sintesis Nanokitosan Dengan Metode Gelasi Ionik Menggunakan Pelarut Asam Formiat Dengan Variasi Rasio Volume Kitosan Dan Natrium Tripolifosfat Aulia Permatasari; Ahmad Fadli; Sunarno Sunarno
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

Nanochitosan is a physical modification of chitosan by reducing the size of chitosan to nano size. The purpose of this research was to determine the effect of variations in volume ratio between chitosan solution and tripolyphosphate solution and to determine the characteristic of nanochitosan with Particle Size Analyzer (PSA) analysis methods. The first step for making nanochitosan is to make a 1% formic acid solution and 0.1% trypolyphosphate solution. After that, make 0.3% chitosan solutions and then stir it using magnetic stirrer. After 15 minutes, trypolyphosphate solution at a volume ratio between chitosan and trypoliphosphate each 3:1 and 7:1 are added slowly to the chitosan solution. Stirring continues for up to 1 hour with a stirring speed of 1200 rpm. The last one is the characterization of nanochitosan. Chitosan from dried shrimp industrial waste has a degree of deacetylation that matches the chitosan quality standard, which is 76%. The particle size from this research were 2639.5 nm and 2882.0 nm. From this research, the particle size and index polydispersity value were increased when the ratio between chitosan solution and tryppoliphosphate increased. Keywords: formic acid, deacetylation degree, ionic gelation, nanocitosan, trypolyphosphate
Perancangan Reaktor Etilen Oksida (R-101) Pada Pabrik Etilen Oksida Dari Etilen Dan Oksigen Dengan Proses Dow Meteor Dengan Kapasitas Produksi 200.000 Ton/Tahun Meysara Meysara; Bahruddin Bahruddin
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

Ethylene oxide (C2H4O), also known as oxirane, is an organic compound in the ether group. Ethylene oxide is a colorless, sweet-smelling gas, flammable at room temperature and is a highly reactive compound. The purpose of designing this ethylene oxide reactor is to determine the type of reactor used and the dimensions of the reactor with an ethylene oxide production capacity of 200,000 tons / year. The reactor design methodology was carried out using Aspen Plus V10 software. Where from this application the data obtained from the ethylene oxide reactor volume (R-101) is 34.75 m3. In designing this reactor, a fixed bed multitube type reactor is used which functions to react ethylene and oxygen to ethylene oxide using a silver catalyst. With a capacity of 200,000 tons / year, the height of the reactor designed is 8.74 m, diameter 3.84 m, and the number of tubes is 1539 tubes.Keywords : Aspen Plus V10, Ethylene Oxide, Fixed Bed Multitube, Reactor
Produksi Enzim Selulase Dan Xilanase Dari Eupenicillium Javanicum Dengan Substrat Bonggol Nanas Menggunakan Solid-State Fermentation Emmilia Dannisa Pratiwi; Evelyn Evelyn; 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

Bioprocess is a biotechnology science that utilizes microorganisms to produce a biochemical product, one of which is an enzyme that can function as a catalyst. Enzyme requirements continue to increase along with the growth of the bioprocess industry. Cellulase and xylanase are enzyme products commonly used in industry, such as pulp and paper, detergents, food, textiles, and others. Pineapple tuber waste contains cellulose and hemicellulose which have potential as pure substrates such as cellulose and xylan. The process of enzyme formation can be done by the fermentation process. This study aims to determine the effect of temperature (25, 30 and 35 ° C) and pH (4, 6 and 8) on the production of cellulase and xylanase enzymes in a state of solid fermentation (solid state fermentation) and compare the activity of its enzymes under submerged fermentation. fermentation). The fermentation process was carried out for 96 hours with tempeature conditions and pH. Enzyme activity was measured using UV-Vis spectrophotometry with the DNS method seen at a wavelength of 540 nm. The highest enzyme activity was obtained at a temperature of 35 ˚C and pH 6 of 0.262 U / mL for cellulase enzymes and 1.683 U / mL for xylanase enzymes. Keywords: Celullase, Enzyme, Solid-state fermentation, Submerged fermentation, Xylanase
Prarancangan Pabrik 1-Hexana Dari Etilen Menggunakan Proses Alphahexol Dengan Disain Alat Utama Reaktor Oligomerisasi Priska Tantino; Padil Padil
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

1-Hexene is a raw material in plastic production and classified as a linear alpha olefin compound. This compound is used as a co-monomer in the production of polyethylene, manufacture of lubricants, manufacture of surfactants and alcohol. The use of 1-hexene in the production of High-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) is one of the co-monomers. The need for 1-hexana in Indonesia is increasing over time, but in Indonesia there is no factory that produces 1-hexene. Therefore, the need for 1hexene has increased significantly in 2018. The increasing need for imports will reduce the source of foreign exchange for the country. So that the establishment of the 1-hexene plant can reduce the need for imports and can increase the country's foreign exchange. The location of the 1-hexana factory is planned to be in the RU II Dumai industrial area with a factory capacity of 100,000 tons / year. The main design is an oligomerization reactor (R101) which functions to react ethylene by trimerizing to 1-hexene with a 1-octene as a byproduct. The type of reactor used is a stirred tank flow reactor. The operating conditions in the reactor were 423.15 K and 30 bar. Plant economic analysis is carried out to determine the feasibility of the factory to be built. Based on the results of the economic feasibility analysis of the factory, the 1-hexana plant is feasible to build with a PBB of 2 years, an IRR of 22.7433%, an ROI of 39.388%, and a BEP of 54%.  Keywords: 1-Hexene,  Alphahexol, Analysis economic feasibility of plant, Ethylene.
Ekstrak Daun Salam (Syzgium Polyantha L) Dengan Metode Soxhlet Sebagai Inhibitor Korosi Pada Baja Karbon ASTM A36 Dalam Media Korosi NAOH Dan HCL Oding Sitorus; Komalasari Komalasari; 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

Corrosion is defined as the result of damage from a chemical reaction between a metal and its environment. The use of inhibitors is one way to inhibit the corrosion rate. Bay leaf extract is an organic material that can be used as an inhibitor. The purpose of this study was to determine the effect of adding bay leaf extract on the corrosion rate of ASTM A36 carbon steel in 0.5 M HCL and 1 M NaOH corrosive media. The extraction method used was socletation with a ratio of ethanol : distilled water 1: 3 and immersion time of 24 hours, 36 hours, 48 hours and 60 hours. The effectiveness of using bay leaf inhibitors (0 and 2.5 gr/L) is known through the weight loss test. FTIR test results show that the bay leaf extract contains tannin compounds which can inhibit the corrosion rate that occurs in ASTM A36 carbon steel when used as a corrosion inhibitor. The best efficiency occurred at a concentration of 2.5 g / L with a soaking time for 60 hours in a 0.5 M HCL solution of 82%. Keywords: bay leaf extract, carbon steel, corrosion rate, inhibitor efficiency
Penerapan Jaringan Syaraf Tiruan Untuk Perlindungan Transmisi Tenaga Listrik Al Imam Akbar; Azriyenni Azriyenni
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

Electricity is a very important commodity for the sustainability of the economy. The increasing demand has pushed power companies to be more efficient in the operation of the power system. Thus, the problem on reducing of the outage duration in the power system needs to be increased. Disturbance in the electric power transmission system is a critical point because it can affect a large area and can extinguish many places. In this study, the method for detecting parts are disturbed by uncertainty in the transmission system, then, the theories of Artificial Neural Networks (ANN) is used. This ANN method aims to apply an artificial intelligence system to estimate the performance of protective equipment in the electric power system. Training and testing data are is generated by simulating single-phase to ground faults with variations in each channel. The operating time of the protection equipment will result in the Circuit Breaker (CB) status when operates. The transmission system that the object of research are 5 buses power system (system interconnection Riau) which is modeled via Matlab/Simulink, then used to run 5 fault scenarios to obtain changes in relay and CB status. The simulation result data is then used to test the ANN model. The simulation results obtained are the fault current output of each transmission line.Keywords: ANN, Transmission Line, Fault Current, Relay, Circuit Breaker
Karakterisasi Dan Potensi Pemanfaatan Limbah Rumah Makan Sebagai Energi Terbarukan Fikri Julian; David Andrio; Lita Darmayanti
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

Food Waste contains high concentrations of organic pollutants. The high organic concentration in food waste makes it suitable reused as an energy source. This study aims to investigate the characteristics of food waste and analyze the potential of food waste. The results of this study indicate the concentration of COD in food waste 58.514 mg / L, oil and fat amounting to 2.340 mg / L and pH 3,4. With high organic concentration then food waste can be utilized as bioethanol and biogas. Keywords: Food Waste
Pembuatan Komposit Serat Batang Pisang Kepok Bermatriks Polyester Dengan Metode Vacuum Bagging Hutagaol, Martiandes; Fatra, Warman; Helwani, Zuchra
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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Various types of bananas with good quality thrive in various regions in Riau. Banana fiber has good potential to be developed as an engineering material by engineering composite materials. The making of composites using kepok banana stem fiber was carried out using the vacuum bagging method. The fiber was heated with temperature variations of 70 ° C, 80 ° C and 90 ° C and time of 2, 3 and 4 hours, then the fiber was extracted with a length of 30 cm. The composite fiber arrangement is continuous. To determine the experimental design and variables that have a significant effect on tensile strength, flexural strength and impact resistance, the statistical method Response Surface Methodology (RSM) is used. The results showed that the increased tensile strength was significantly influenced by the volume fraction of banana fiber, temperature and heating time of the fiber. The highest tensile strength value of 89.855 MPa and the highest flexural strength value of 327.76 MPa were obtained at a volume fraction of 38% banana fiber, heating temperature 70 ° C and heating time of 4 hours. The highest impact resistance value of 2.56 J was obtained at a volume fraction of 28% banana fiber, heating temperature of 70 ° C and heating time of 2 hours.Keywords: Banana Fiber, NaOH, Response Surface Methodology, Vacuum Bagging.
Perancangan Alat Pemotong Pelat Otomatis Dengan Las Oxy-Acetylene Gilang Syukma Pratama; Herisiswanto Herisiswanto; Dedi Rosa Putra Cupu
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

Currently the most widely used cutting steel is cutting with oxygen gas, the manual weld cutting makes the cutting result of less appropriate as well as the complicated process. The cutting tool plate is made to facilitate the work especially in the field of construction. In this research aims to design the Oxy-Acetylene automatic plate cutting tool that makes easier of the plate cutting process. In the design process used the Autodesk Inventor 2015 software as well as analysis of structural strength in this design. From the design process, was obtained the output in the form of technical drawings of the automatic plate cutting of Oxy-Acetylene.The analysis process was done in two ways with manual calculations and using Autodesk Inventor 2015. Then from the calculation results were obtained the voltage that occurs on the axis y = 0.908 MPa on the x-axis 0.7334 MPa the deflection occurring on the y-axis = 0.001868 mm and on the axis x = 0.002798 mm. Keywords : Automatic plate cutting machines, stress, deformation, Oxy-Acetylene
Rancang Bangun Sistem Presensi Siswa Menggunakan QR Code Pada SMA Negeri 10 Pekanbaru Dinda Qoernia Jelita; Salhazan Nasution
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

Attendance at SMA Negeri 10 Pekanbaru still done manually with an attendance book which then calls the names of students one by one to record their attendance which is carried out by each subject on one day by the teacher. This gives the teacher difficulty in recapitulating student attendance data due to damaged data, missing attendance lists and irrelevance of data. Therefore, a student presence system was designed and built using an Android-based QR code. Presence recapitulation is managed by the admin via the web and can be seen by parents of students. The system divided into 2, namely the android application for teachers to attendance and parents to see the history of student attendance and also the web for admin to manage all data. In the application, the teacher can perform presence by scanning the QR code that is owned by students or doing attendance manually. Parents through the android application will get notification of student attendance and can view attendance history through a certain date range. Admin can manage all data via the web. Usability testing that has been carried out by distributing USE questionnaires and calculated using a Likert scale results in 88.3% which is very satisfying in category. Keywords: attendance, android application, QR code, USE questionnaire

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