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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Studi Timbulan Dan Komposisi Sampah Domestik Wilayah Pengembangan IV Kota Pekanbaru Aris, Aris; Yenie, Elvi; Darmayanti, Lita
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

Sampling is carried out based on SNI 19-3964-1994. The results showed that the number of solid waste generated in units of weight in the District of Tenayan Raya was 0,431 kg/person/day and in the unit volume was 3,376 l/person/day. Waste generation in Bukit Raya Sub-district is in weight units of 0.483 kg /person/ day and in volume units of 3,376 l/person/day. The composition of domestic waste in Development Region IV is dominated by 54.5% food waste, 11.2% foliage, 6.9% plastic, 5.5% paper, 5.7% textile, 4.2% rubber, 3.4% glass and 3.3% metal.  Keywords: waste generation, composition of waste
Pemodelan Kesetimbangan Termodinamika Non-Stoikiometrik Gasifikasi Biomassa Mazlani Mazlani; Hari Rionaldo; Zulfansyah Zulfansyah
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

Biomass gasification is a technology that can be used to convert biomass into gas fuel, chemicals, and energy which is more convenient and usable. The quality of the resulting product depends on the of gasification agents such as air, steam, oxygen, and process parameters such as temperature, type of biomass, and equivalent ratio. The biomass gasification process presents the mathematical model that has been given and solve the modeling with non-stoichiometric thermodynamic equilibrium method. The non-stoichiometric thermodynamic equilibrium model involves minimizing the Gibbs free energy. This model is useful for further research if there are changes in the gasification agent and process parameters.Keywords : biomass gasification, gibbs free energy, non-stoichiometric
Analisis Windrose Sebagai Input Sofware AERMOD Risma Nopita; Aryo Sasmita; David Andrio
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 operation of Tembilahan Coal-fired Power Plant produces emissions, one of which is SO2. The SO2 pollutant emissions can have an impact on the environment as well as on health. To find out the distribution of SO2 emissions more specific the surrounding area, a modeling using AERMOD View software is performed. Modeling is carried out within one year by doing windrose analysis. The results of the simulation show that the pattern of SO2 emissions distribution from Tembilahan Coal-fired Power Plant in 2018 - 2019 tends to move from northeast to southwest from its source. The distribution of SO2 from the sources is affected by the characteristics of the wind direction. Keywords: AERMOD View, SO2, Coal-fired Power Plant
Analisa Performansi Lora Pada Sistem Absensi Mahasiswa Yofan Hakiki; Yusnita Rahayu
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

Attendance lists are very much needed in lectures. The presence system using fingerprints was chosen because it has advantages, namely Perennial Nature, Immutability, Individuality. Thepresence system device uses the FPM10A fingerprint sensor, Arduino uno as a microcontroller and LoRa as a transceiver module. The LoRa module was chosen because it has advantages, namelygeolocation, low power consumption, can transmit a maximum signal of 100 KM and is equipped with end-to-end AES128 encryption. The test scenario is carried out in two conditions, namely Lineof Sight (LOS) and Non-line of Sight (NLOS) conditions which are divided into 5 test points, namely 50m, 100m, 150m, 200m and 250m. The spreading factor used is SF7 with a bandwidth of 125 KHzand a coding rate of 4/5. The bitrate value is 5496 bits / sec. The best RSSI value in LOS conditions is -73.40 dBm and NLOS conditions is -87.90 dBm. The best delay value in LOS conditions is0.03713 s and NLOS is 0.0371192 s. The best transfer rate in the LOS condition is 0.029213 bits / sec and the NLOS condition is 0.29214 bits / sec. The best throughput in the LOS condition was0.23370% and the NLOS condition was 0.2336%. In the LOS condition, the LoRaTM modulation is capable of receiving data up to 250m while the LoRaTM modulation NLOS condition is capable of receiving data up to 250m. Energy usage when sending data is 0.001066397 J, when receiving data is 0.000682536 J. When the sending device is willing to use energy of 5.08296614 J and thereceiving device is 3.011387426 J.Keyword: presence, LoRa, Modulation
Perancangan Alat Bantu Komunikasi Untuk Pasien Pasca Stroke Dengan Sensor Suhu Muhammad Hamdy Maadjid; 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

Stroke is a neurological emergency, the morbidity rate is increasing from year to year. According to the World Health Organization, 15 million people suffer a stroke worldwide every year. Patients with post-stroke disabilities will have difficulty in carrying out daily activities, especially in communicating with other people. Therefore, a post-stroke patient communication tool was made with a temperature sensor that aims to make it easier for post-stroke patients to be able to communicate for a better quality of life. This communication aid is in the form of gloves which are paired with 5 Flex Sensors as movement signal readers which will then be processed by Arduino Nano, this tool is also equipped with a DS18B20 temperature sensor and a pulse sensor that will monitor the physical condition of post-stroke patients in real time, output data in the form of characters and sounds, for characters will be displayed by the LCD and for sound will be played using a speaker where voice data will be called up by the mini DFPlayer module. Keywords: post stroke aids, Arduino nano, Flex Sensor, DS18B20 Temperature Sensor, Pulse Sensor Sensor
Analisa Pola Dan Spektrum Partial Discharge Terhadap Kerusakan Transformator Togi Sugiono; Firdaus Firdaus
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Electrical system is one very important part in industry.Partial discharge is a disturbance phenomenon thatoccurs in power transformers. When partial discharge conducted continuously it will damage thetransformer. Partial discharge Measurement on the transformer in PT. IKPP is conducted to determine thecondition of the transformer insulation resistance, by analyzing the shape of the wave pattern and spectrumaccording to the standard used. The method uses Power PD-TP500A along with the Acoustic Emission (AE)sensor and the High Frequency Current Transducer (HFCT) sensor measurement on 3 33KV transformersand analyze the pattern and the spectrum using software Power PD-TP500A MD. The measurement of the1st transformer on Tuesday, September 17th 2019 at 02:25 pm resulted there was no formation of wavepatterns and spectrum and indicated normal transformer. The measurement of the 2nd transformer onThursday, September 19th 2019 at 2:10 pm resulted there was the formation of wave patterns and spectrumindicating monitoring level condition. Then the measurements of the 3rd transformer on Monday, September2019 at 2:30 pm resulted there was formation of wave patterns and spectrum on the AE and HFCT sensorsindicating critical level condition. The normal, monitoring and critical condition of a transformer can bestated using partial discharge pattern and shape analysis done in this research.Keywords: Transformer Partial Discharge, Power PD-TP500A, AE Sensor, HFCT Sensor
Pengaruh PH Terhadap Evesiensi Air Limbah Grey Water Dengan Media Honeycomb Febri Maharani Putri; Aryo Sasmita; Jecky Asmura
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

Domestic wastewater contributes greatly to water pollution in urban areas because the application of treatment is not optimal. This research with aerobic biofilter system with plastic media honeycomb was done to process domestic wastewater. The purpose of this study was to study the influence of recirculation and aeration (reactor A), aeration (reactor B), recirculation (reactor C), and without recirculation and aeration (reactor D) on the decrease in pH concentration in wastewater. Reactors are prepared with each reactor containing honeycomb media. Conditioning and growth of microorganisms in the reactor is carried out for 14 days until the biofilm is formed. The optimum values of pH removal in the four reactors with a stay of 12 hours were pH 90.1%, 93.7%, 75.8%, 67.9%. The results showed that reactor B with the use of an aeration system is effective in lowering the concentration of pollutants in domestic wastewater. Keywords: domestic waste, biofilter aerobic, honeycomb, pH
Penyisihan Fosfat Pada Limbah Cair Laundry Dengan Biokoagulan Kitosan Cangkang Udang Windu Evi Royana; Syarfi Daud; Edward Hs
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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Chitosan is a Biocoagulant which is not poisonous, easy to degradable and polielectrolite. This research aims to know the the dose of coagulant and stirring speed in fosfat parameter removal to ward Laundry Liquid Waste and the result of the analyzed compared to PERMENLH/5/2014. This research was using Floculation and Sedimentation - Coagulation by using Chitosan from the Windu Shrimp Eggshell with different dose of coagulant and stirring speed to reduce the concentration of fosfat. The dose of coagulant is 150 mg/l, 175 mg/l, 200 mg/l and 225 mg/l and the stirring speed is 100 rpm, 125 rpm and 150 rpm in 1 minute and 40 rpm slow stirring in 20 minutes. The result showed that the optimum dose of Chitosan Biocoagulant 200 mg/l with the stirring speed 150 rpm with the removal efficiency 91,44%. The analysis results for fosfat have fulfill the laundry wastewater quality standards. Keywords: Chitosan, Fosfat, Flokulasi-Kuagulasi, Laundry Liquid wast.
Kaji Eksperimental Penggunaan Biosolar B40 Terhadap Unjuk Kerja Mesin Dengan Menggunakan Variasi Tekanan Pengabutan Pada Nosel Walter Valentino Sinaga; Romy Romy; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

Biodiesel is an alternative fuel that can be used to replace fossil fuels such as Diesel, which are increasingly depleting. Biodiesel has a higher viscosity, density, and surface tension value than conventional fossil fuels. The level used by the Indonesian government is 20-30% Biodiesel content, which is then added with Diesel fuel. If the percentage level of Biodiesel is increased, there are several ways that can be used to improve engine performance, one of which is to adjust the fogging pressure. This study aims to determine the effect of increasing fuel injection pressure on diesel engine performance using Biosolar B40. The research was carried out by means of a diesel engine operated at a constant rotation of 900 rpm, and given a load of 2,500 kg/m2 to 15,000 kg/m2. To improve fuel atomization, the authors change the fogging pressure by rotating the adjusting screw contained in the fuel nozzle and then tested using an injector tester so that the pressure values are 110 bar, 120 bar, 130 bar, 140 bar, and 150 bar. The calculated parameters include Δh on the orifice, the volume of fuel used, fuel consumption time, and engine rpm. In the tests conducted, it was found that variations in injection pressure have an effect on engine performance parameters such as effective shaft power, brake mean effective pressure, thermal efficiency values, air fuel ratio, and specific fuel consumption which are better than standard pressure. Where for the best engine performance value at an injection pressure of 150 bar, with an effective shaft power of 3,775 kW at a maximum load of 15,000 kg/m2, the greatest value of bmep at a load of 15,000 kg/m2 is 665.415 N/m2, the best thermal efficiency at a load of 12,500 kg/m2 is 89.902 %, for a better air and fuel ratio with a value of 212.852 at a load of 2,500 kg/m2, and the smallest specific fuel consumption with a value of 0.0000235 kg/kW.s at a load of 12,500 kg/m2. Keywords: Injection Pressure, Biodiesel, B40, Engine Performance
Rancang Bangun Kendali Sistem Inverter Sinusoidal Pulse Width Modulation (SPWM) Frekuensi 25 Hz Dan 50Hz Berbasis Sensor Kelembapan Tanah Mengunakan Arduino Uno R3 Riski Kurniawan; Antonius Rajagukguk
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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This study aims to create a two-frequency inverter control system, which works based on changes in the value of the soil moisture sensor, as a motor control for automatic plant sprinklers. In this study, the inverter is designed using the Sinusoidal pulse width modulation (SPWM) method, by amplifying the SPWM signal using IC IR2110, so that it is able to run the switching process in the h-bridge inverter circuit, the inverter voltage is increased with a step-up transformer and filtered using a low pass filter. The inverter output frequency is determined based on the YL-69 sensor value, with a control system based on Arduino uno. Based on the results of testing the inverter prototype, in wet soil moisture conditions with a percentage of less than 25%, the inverter is in standby mode, at the moisture content of the moist soil with a percentage between 25-40%, the inverter produces a frequency of 24.61 Hz, while the moisture content is 24,61 Hz. dry soil with a percentage of more than 40%, the inverter produces a frequency of 48,83 Hz. Based on the results of the prototype testing, it can be applied to coaching a single-phase induction motor type water pump in automatic plant sprinklers. Keywords: SPWM, IC 2110, H-bridge inverter, sensor YL-69, low pass filter

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