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INDONESIA
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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Pengaruh Rasio Bahan Baku Dan Variasi Ukuran Partikel Terhadap Nilai Kalor Biobriket Hasil Pemanfaatan Limbah Tandan Kosong Sawit Dan Lumpur IPAL Produksi Minyak Sawit Hafizh, Muhammad; Yenie, Elvi; HS, Edward
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

WWTP sludge in palm oil production with the addition of empty fruit bunch can be used as raw material for making briquettes through the carbonization process. This study aims to study the effect of variations in treatment on the calorific value and compressive strength of the briquettes produced. In this study the WWTP sludge in palm oil production was carbonated at 300°C for 60 minutes and empty fruit bunch at 450°C for 90 minutes. Variations of variables used were particle size -80/+100, -100/+120, and -120/+140 mesh and the composition of empty fruit bunch and WWTP sludge in palm oil production were 90%:10%, 80%:20%, 70%:30%, and 60%:40%. The results showed that the best briquette heating value were obtained on the composition of raw materials 90%:10% with a particle size of -80/+100 mesh were the heating value of 5310,46 cal/gr and the best compressive strength were obtained on the composition of raw materials 90%:10% with a particle size of -120/+140.Keywords: briquettes, crude gliserol, calorific value
Deteksi Posisi Plat Nomor Kendaraan Bermotor Pada Video Menggunakan Metode Frame Difference Setiabudi, Muhamad Indra; Candra, Feri
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

In this increasingly modern era, technological development have been spreading to various fields. One of those fields is computer vision on recognizing various object. There are several methods that usually used on object recognition. Frame difference is one of those methods that popularly used on object recognition. The frame difference method detect an object by calculating the pixel differential of two or more picture. Vehicle license plate is one of the popular objects that is studied in the field of computer science. It is because the license plate recognation can be implemented on various field such as parking system, tax system, traffic violations detector system and many more. In general, research on vehicle license plate recognition is done on static image and not moving image. Therefore, the author done this detection of vehicle license plate potition on a video research with the hope that it can become a reference for the readers and the world of research in detecting number plates. This research was tested using 10 videos of moving motorcycle. The result show that the system was able to recognize and capture 7 out of 10 license plate. From the result we can see that the system reaches 70% on accuracy.Keyword: Ocject Recognition, License Plate Detection, Frame Difference
Stabilisasi Tanah Lempung Plastisitas Tinggi Dan Sedang Menggunakan Kapur Z, Mauliza A.; A, Nugroho S.; G, Wibisono
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

Clay is soil with grain diameter <0.075 mm. Clay has poor properties in bearing capacity in terms of compressibility, permeability, and plasticity. One effort to improve soil properties is soil stabilization. Effective clay stabilization is by adding certain chemicals material such as lime. Lime is calcium oxide (CaO) made from carbonate stones that are heated at very high temperatures. The purpose of this study was to determine the effect of lime addition on clay characteristics. The variation of lime used in this study is 0%, 3%, 5%, 7% and 10%. The results showed that lime effectively reduced dry plasticity and density. The plasticity value is reduced by up to 50% from the original clay soil (CL) compared to Minas clay which is reduced by 7%. MDD (Maximum Dry Density) decreased by 10% in the Minas clay and OMC (Optimum Moisture Content) increased by 32% in the Palas clay. Keywords :Clay, Density, Lime, Plasticity, Stabilization.
Pengukuran Gaya Model Airfoil Sd7043 Didalam Terowongan Eswt (Education Small Wind Tunnel) Yopiandi, Algeri; Harahap, Hanni Defianti; Anuar, Kaspul
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

Airfoil or aerofoils that create a reaction force along the cross-section of the wings. This reaction force will make the aircraft able to fly at a certain flying speed. In engineering, there are different types of airfoils with different style characteristics as the airfoil geometry changes, which determines the usefulness of the wings of the aircraft. Therefore, it is necessary to conduct arodynamic testing to obtain the characteristics of an airfoil that is using a wind tunnel by making a cross-section of airfoils as a model to be engineered like the working state of the real airfoil. In this test, the airfoil used was Airfoil Low reynolds SD7043 with a chord ratio of 3 to span length. The testing stage was done by airfoil simulation on XFLR5 software with a range of 50,000 - 300,000 reynolds and then experimental testing was carried out using an open circuit wind tunnel, ESWT ( Education Small Wind tunnel) located in BBTA3 with an airflow speed of 4.87 m/s, 12.22 m/s, and 14.33 m/s. Test results at airflow speeds of 4.87 m/s were obtained graphs of experiment results that tended to stall faster than simulations due to the smoothness of the airfoil surface and the level of flow turbulence in the high test section at low air speeds.  At 12.22 m/s, there is a difference in chart trends in the post stall section where the ride begins to vibrate at an angle of attack of 12°. Then at a flow speed of 14.33 m/s the resulting data was obtained invalid because the accused model touched the wall of the test section. But from the overall data shows a curve trend similar to theoretical so it can be stated that the contour of the model airfoil SD7043. Keywords: Airfoil, Low Reynolds, SD7043, ESWT.
Analisis Lahan Sektor Pertanian Di Kabupaten Kampar, Riau Zustika, Rizki; Sasmita, Aryo; Isnaini, Isnaini
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

Agriculture is widely consists of several sectors including agriculture, plantation and livestock. The aim of research was to agricultural sector land analysis in Kampar District Province of Riau. The instruments used in this study are the Microsoft Excell Software 2010 and ArcMap Software 10.3 The data used is secondary data. The result is the agricultural land area consists of three commodities in Kampar district namely rice, crops and horticultural. The highest land area is derived from rice commodities covering an area of 9,159 ha.   Keywords: agriculture, agricultural sector land analysis,  Kampar District.
Sintetis Pembuatan Briket Menggunakan Limbah Buangan Pulp Tanuwijaya, Michael; Amri, Idral; Zultiniar, Zultiniar
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 one of the largest paper producing and exporting countries in the world. Along with the increase in paper production causes an increase in solid waste originating from the reject pulp. The reject pulp has the potential to produce energy because it still contains high cellulose content of around 85.16% which is able to support the provision of usable and environmentally friendly fuel. The purpose of this study was to use of reject pulp as fuel in the form of briquettes by mixing coconut shell charcoal as cofiring and CPO sludge as an adhesive. Briquettes will mixed with a variety of composition of reject pulp and coconut shell charcoal cofiring from 80%: 0%, 20%: 60%, 30%: 50%, 50%: 30%, 60%: 20%, and 0%: 80% , for adhesive 20% while 90%: 0%, 30%: 60%, 40%: 50%, 50%: 40%, 60%: 30%, 70%: 20% and 90%: 0% for adhesive 10 % of the total briquette weight which is ± 2 grams. The briquettes that have been form must qualified to the quality standards of SNI for wood charcoal (No.1 / 6235/2000) where after being tested only a few compositions have qualified the standards, for the reject pulp composition and coconut shell charcoal cofiring from 0:90, 30:60 40:50 with an adhesive composition of 10% and a composition of 0:80, 20:60, 30:50 with an adhesive composition of 20%, with the highest calorific value of 5274 cal/g and ash content of 2.65%. Key words: Briquettes, Coconut shell charcoal, CPO sludge, Reject pulp,
Perancangan Distributed Generation Menggunakan Phasor Measurement Unit Saputra, Rangga Eka; Zakri, Azriyenni Azhari
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 aim of this research is to design a Distributed Generation (DG) connected system with solar cell source using Matlab/Simulink R2016a, build a Phasor Measurement Unit (PMU) connected to DG using Matlab/Simulink R2016a, operate a DG system connected to solar cell for monitoring voltage and phasor currents through PMU. This research was conducted using simulations found in the Matlab R2016a application where the system consists of 4 buses, 2 loads with a voltage of 20 kV, 2 voltage boosters, 20 kV, and 4 transmission lines. The results showed that the impact of the DG system using this PMU has improved the quality of the power generated from both sources, namely the 150-kV network and the DG supplied at both loads. In addition, the results of this data prove that DG has a role in maintaining power at a stable load and increasing energy efficiency by reducing power losses in this DG connected system. The DG connected to the system has an effect on increasing the current in each bus, so that the load current has increased from before, giving an effect on increasing the voltage in each bus, so that the voltage on both loads has increased from before. This comparison also shows the results of the positive sequence value of phasor currents and phasor voltages before and after DG Keywords: Distributed Generation, Phasor Measurement Unit, solar cell
Penggunaan Biokoagulan Dari Biji Tanaman Untuk Menurunkan Kekeruhan Pada Air Sungai Olivia, Arinda; Darmayanti, Lita; Fitria, Dewi
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 problem that is often found in raw water sources, namely surface water or river water, is that it tends to have high turbidity concentrations. This turbidity is basically caused by particles that are difficult to settle. One method that can be used to remove turbidity in water is the coagulation and flocculation processes. This study aims to determine the biocoagulant ability of papaya seeds to reduce turbidity in river water, by varying the dose of coagulant 0.2 gr / l; 0.4 gr / l; 0.6 gr / l; 0.8 gr / l; 1.0 gr / l and 1.2 gr / l. The results obtained showed that the highest turbidity removal was at a coagulant dose of 0.6 gr / l with an efficiency of 87.42%. Keywords: coagulation and flocculation, biocoagulant, papaya seeds, turbidity
Karakterisasi Dan Potensi Pemanfaatan Palm Oil Mill Effluent (POME) Menjadi Biogas Ester Melinda; David Andrio; Elvi Yenie
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

Palm oil mills in Indonesia are growing rapidly. This is in line with the waste generated by palm oil, the Palm Oil Mill Effluent (POME) which is increasing. POME is a waste that has potential that can be converted into energy sources, namely biogas. This research was conducted by analyzing the characteristics of POME through pH, chemical oxygen demand (COD) and volatile suspended solid (VSS) as well as its potensial in producing biogas. From this research COD obtained a value of 32000 mg/L. The potensial of biogas energy that is formed through the degradation of organic matter in POME is obtained by 1,35 L/L.day. Keywords: biogas, COD, palm oil mill effluent
Studi Penghematan Energi Pada Gedung Tiga Lantai Di Kabupaten Padang Pariaman Hidayatul Catra Burhan; Iswadi Hasyim Rosma
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Life in the modern era like today is a life that is very dependent on the availability of energy. With the availability of energy, humans can create technology that alleviates human work. Unfortunately human dependence on energy is increasing and if overexplored it will have an impact on the energy crisis. The rise of energy saving campaigns by the government requires all people to carry out energy saving activities from small, medium, or large scale. The Polytechnic of Shipping of West Sumatra is a campus under the Ministry of Transportation of the Republic of Indonesia, located in Padang Pariaman Regency, West Sumatra. In this study the authors conducted a study and observation of electrical energy savings in the main building on the campus of the Polytechnic of Shipping of West Sumatra, where the energy savings obtained from this study amounted to 2,393.1 kWh / month Key word: energy, energy savings, the lighting

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