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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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Pemantauan Gangguan Pada Saluran Transmisi Berbasis Titik Koordinat Menara Tristianty, Wenny Dwi; Azriyenni, Azriyenni
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

This research uses an Artificial Neural Network (ANN) method to estimate fault location based on the coordinate point. The 150 kV transmission system is modeled using the Matlab R2016a software. The modeled transmission system is the transmission from Koto Panjang (KP) bus to Garuda Sakti (GS) bus in Riau Province with 64,11017 Km length. Min – max normalization method is used to process the peak value of the voltage phase (VA, VB, VC), current (IA, IB, IC) and zero sequence current (INOL). ANN estimation is used to estimate the coordinate point of fault that occurs on electrical transmission line. The training and testing data are generated by simulating each type of short circuit in Matlab/Simulink R2016a with variation of fault location. Variation of fault location are based on distance of tower from the KP bus. The obtained result from 10 ANN estimation testing are coordinate point estimation in latitude and longitude form. The ANN model that has smallest average error percentage is the ACG fault ANN model, which is 0,004013 % and the largest is the ABG fault ANN model, which is 0,78527 %. The output of the ANN estimation then denormalized and plotted to the actual map using ArcMap 10.4.1. Keywords: ArcMap, Artificial neural network, Coordinate point, Matlab, Short circuit, Simulink, Transmission line
Penyisihan Zat Organik, Warna Dan Besi (Fe) Pada Pengolahan Air Gambut Secara Koagulasi Dan Flokulasi Dengan Menggunakan Koagulan Alami Dari Biji Jagung (Zea Mays L.) Firdha Ozani Rosselda Fahmi; Dewi Fitria; 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

Peat water in Riau Province may be a source of clean water because of its availability, but the quality still does not meet the quality standards of clean water according to Minister of Health Regulation No. 32 of 2017, such as organic substances, colors and Fe still high. One method that can be used to remove contaminants in peat water is the coagulation and flocculation process using natural coagulant corn seeds. This study aims to determine the effect of coagulant dose of corn seeds and slow stirring speed in removing organic matter, color and Fe in peat water by varying the coagulant dose of dosis 5 mg/L; 10 mg/L; 15 mg/L; 20 mg/L; 25 mg/L and 30 mg/L The results obtained showed that the highest Fe removal was found at a coagulant dose of 80 mg/L with an efficiency of 61.12%, while for organic substances and colors it did not meet the quality standards. Key words: Coagulation and Flocculation, Peat Water, Corn seeds, Organic Substance, Color and Fe
Karaterisitik Buangan Akhir Pengolahan POME PT. XYZ Basopi, Hasbi; Andrio, David; Asmura, Jecky
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

Problem of Palm oil mill industry is POME final discharge failed to comply discharge standard and brownish black color in POME final discharge inhibits the growth of aquatic biota and must be treated to avoid environment pollution which affect the environment health. Before the treatment, the characteristics of POME final discharge should be determined in order to attain the proper action. This study aims to describe the characteristics and quality of the COD, SS and color POME final discharge. Based on the result of laboratory test on samples of POME final discharge showed values for the each parameter are COD 2202 mg/l, SS 320 mg/l and color 8080 Pt.Co. The result of POME final discharge is not eligible according to standard of Environmental Ministry Decree No.5 of 2014 concerning Oil Industry Wastewater Quality Standard. Therefore, POME final discharge treatment is required to protect the environment from further pollution. Keywords : POME final discharge, COD, SS, color
Aplikasi Katalis α-MnO2-400 Yang Dikalsinasi Pada Temperatur 400oc Untuk Degradasi Kandungan Organik Limbah Cair Industri Pulp Dan Kertas Peji Nopeles; Edy Saputra; Bahruddin Bahruddin
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 pulp and paper industry is a water-intensive industry, and number third in the world and also a significant contributor to pollutant discharge to the environment. It is know that the low COD/BOD ratio obtained from pulp industry wastewater is an average of 0.3 while the ideal of biodegradability value is in the range above 0.5. Thus, there are alternative treatments that can degrade hazardous compounds in wastewater that are slow to degrade through the oxidation process, known as the Advanced Oxidation Process (AOP). AOP is based on active radicals which are produced as oxidizing agents to mineralize the complex chemical substance in the wastewater. One of the active radicals, known sulfate radicals (SO4*), has a high oxidation potential of 2.5 – 3.1 V. Several studies showed that radical sulfates can be produced by catalytic oxodation process, such as combination of Peroxymonosulfate with homogeneous metal ion catalyst (Fe2+, Mn2+, Ni 2+, Co2+, Cd2+, Cu2+, Ag+1, Cr3+, Zn2+). In this study, AOP method peroxymonosulfate which was activated with the catalyst α-MnO2-400 were used to treat organic content in wastewater of pulp and paper industry. The α-MnO2-400 catalyst was produced from 1:3 molar potassium permanganate (KMnO4) and maleic acid that calcined at 400oC. This catalyst was characterized by XRD, BET and FESEM. From XRD analysis obtained the peak aligned with JCPDS Standard. From the BET analysis obtained surface area is 49.17 m2/g, pore size 6.4 nm and pore total 0,16 cm3/g. From FESEM analysis obtained crystalit structured with average length 21 nm. The best degradation of COD and TOC concentration obtained at temperature 45oC, at retention time 240 minutes, with peroxymonosulfate concentration 2,0 g/L and catalyst concentration 0,4 g/L (73% and 77%). Key word: AOP, Catalyst, COD, Peroxymonosulfate, Waste water
Perancangan Pusat Jajanan dan Wisata Kuliner Olahan Sagu Di Selatpanjang Dengan Pendekatan Arsitektur Bioklimatik Dede Mefriadi; Wahyu Hidayat; Yohannes Firzal
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

Geographically, Selatpanjang is located on the eastern coast of the island of Sumatra which is bordered by a number of neighboring countries, namely Singapore and Malaysia, with the territory being an archipelago. Selatpanjang is very famous for its processed dishes made from sago, otherwise known as sago flour. Sago flour is processed product obtained from processing terraces of sago palm or sago trees. Sago flour has physical characteristics similar to tapioca flour. Sago can also be used as a staple substitute for rice which contains lots of carbohydrates. The demand for providing culinary facilities and processed sago snacks cannot be separated from the natural resources produced from Selatpanjang itself, namely sago, so the need to provide facilities to raise the potential of natural resources in Selatpanjang, namely in the form of the Snack Center and Processed Sago Culinary Tour facilities. The main factor that drives the establishment of a culinary facility for processed sago, is the lack of interest from the public to consume the processed sago, even though the potential natural resources produced from the Meranti Islands are mostly sago or sago starch. In addition, to encourage tourism activities in Selatpanjang in the form of culinary tours. The design of the Sago Processed Snack and Culinary Center in Selatpanjang uses a bioclimatic architecture approach which is known to be very friendly to the surrounding environment, and also to optimize the use of energy used in buildings, such as lighting, ventilation and other energy use in order to achieve comfort for its users. Keyword : Friendly, culinary, potency, Sago
Analisis Ketidakseimbangan Pembebanan Arus Netral Dan Losses Di Jaringan Distribusi Khoerudin Khoerudin; Firdaus Firdaus
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 electricity system in the office complex of the Rokan Hulu Regent District has a problem of load imbalance. One of the causes is the unequal loading factor at each line of its phase, or becauseof the unequal load switching time. As a result of the imbalance of loading resulted in the electric current in the neutral conductor. The current flowing in the neutral conductor causes losses. Thisresearch discusses the load imbalance in PP 129 distribution transformer that supply 6 buildings, namely the Rokan Hulu UPT Provincial Revenue Service, the Financial and Asset ManagementAgency, the Regional Revenue Agency, the Youth and Sports Education Agency, the Office Health and Food Crops and Horticulture Service. The method used is current and voltage measurement onthe transformer and also on the panels in each building using Digital Clamp Meter and Hexing HXE320. Load imbalance analysis from measuring data will be compared with IEEEstd 466-1980 analysis from measured data shows large load imbalances occured (26.4%) with neutral current 22.1 A and exceeds the 20% threshold from IEEE std.466-1980. This load imbalance caused 481 Watt losses due to current flow in the neutral conductor. Installation of JTR connection points thatare not adjusted with connection scheme is the cause of load imbalance.Keywords: load imbalance, neutral current, power losses.
Karakterisasi Dan Potensi Buangan Akhir Pengolahan Pome Menjadi Air Baku Dzaki Furqoon; David Andrio; Fri Murdiya
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

POME final discharge is a problem for the palm oil industry at this time because it does not reach the predetermined quality standards and can damage life in aquatic biota. This study aims to determine the characteristics of POME final discharge and to analyze the potential treatment methods for Chemical Oxygen Demand (COD) removal in POME final discharge using the ozonation method. The results showed that the concentrations of COD in POME final discharge were 290.9 mg / L. Duration of contact time in the ozonation method could affect the removal of COD in the POME final discharge. Keywords: POME final discharge, Ozonation
Penyisihan Kadar Logam Cr (VI) Dan Cr (III) Pada Limbah Cair Elektroplating Dengan Kombinasi Proses Pengolahan Secara Biosorpsi Menggunakan Mikroalga Chlorella sp. Dan Koagulasi Flokulasi Putri Sarah Nurliana Atmaja; Shinta Elystia; Edward HS
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Electroplating liquid wastewater is liquid wastewater that comes from the process of coating a metal with other metals with the help of an electric current. This research conducts processing of electroplating liquid wastewater using a combination of treatment processes by biosorption using microalgae Chlorella sp. immobilization in an airlift bioreactor and further processing by coagulation and flocculation in a coagulation and flocculation reactor using Poly Aluminum Chloride (PAC) coagulants. The purpose of this study was to determine the removal efficiency, initial concentration and optimum contact time and functional groups in microalgae Chlorella sp. The variation of treatment in this study is the initial concentration of wastewater of 25, 50, 75, 100% with variations in contact time for 1, 2, 3 and 4 days in the biosorption process and the addition of a coagulant dose of 600 mg / L in the flocculation coagulation process. The results showed that the biosorption process obtained the best variation in the concentration of 75% wastewater in 4 days contact time. The combination of biosorption, coagulation and flocculation processing can set aside the Cr (VI) content of 93.03% and Cr (III) of 69.8%. Keywords: Electroplating Liquid Wastewater, Chlorella sp., Chrom, Wastewater Concentration, Contact Time.
Pengaruh Sudut Chamfer Terhadap Timing Melt Point Pada Penyambungan Material Mild Steel Menggunakan Las Gesek Rotari Muhammad Ryan Detra; Yohanes Yohanes; Ridwan Abdurrahman
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

Rotary friction welding is a type of friction welding which is a type of solid state welding where the welding process is carried out in a solid phase. The friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. This research discusses how the effect of the chamfer angle on the timing melt point and the maximum tensile strength in joining mild steel material with the rotary friction welding method, namely by varying the chamfer angle at 0°, 15°, 30°, 45°, 60°. This research uses analytical and experimental methods to analyze the effect of the chamfer angle on the timing melt point. The results of the analysis show that the greater the chamfer angle, then, longer the timing melt point. The lowest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle of 0° is 421.17 Mpa and the highest average maximum tensile strength value of the joint results was obtained at the variation of the chamfer angle 45° is 505.53 Mpa. Keywords: Rotary Friction Welding, Chamfer, Timing Melt Point
Analisis Perilaku Balok Beton Bertulang Tanpa Tulangan Geser Melalui Pemodelan Elemen Hingga Muhammad Rizki; Ridwan Ridwan; Alfian Kamaldi
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 Beam is a structural element that has the function of bearing the load perpendicular to the longitudinal axis. The collapse of reinforced concrete beams without shear reinforcement can be caused by the collapse of one of the shear force transfer components. Beams without shear reinforcement will experience changes in behavior both in terms of strength and collapse patterns. Crack patterns that occur in the test specimen due to loading can change due to changes in the shear strength of the concrete. The purpose of this study was to analyze the shear behavior of reinforced concrete beams without shear reinforcement to obtain crack patterns maximum load, and maximum deflection values through finite element model. The crack pattern of the specimens through the finite element program started by the initial cracks that initially occur in the tensile region in the form of flexural cracks, then cracks turned into diagonal cracks towards the compressive part of the beam near the load bearing which cause a failure in the form of shear failure. The results of finite element model showed the maximum load obtained by reinforced concrete beams without shear reinforcement is 31.493 kN with a deflection of 8.054 mm.Keywords: beam without shear reinforcement, FEM, shear behavior, crack pattern

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