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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 Aktivasi Naoh Terhadap Biosorben Spent Mushroom Substrate (SMS) Shinta Nurdiyanti; Elvi Yenie; David Andrio
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

Spent mushroom substrate (SMS) generated as waste by mushroom industries after the harvesting of mushroom. SMS is one of the most organic waste generated from agricultural waste that contain lignocelluloses and can be used in modifed for the adsorption of dyes, pollutants and heavy metals. In this study, SMS was modified using sodium hydroxide (NaOH) and prepared as biosorbents. NaOH can be an efficient and economical modifier for lignocelluosic material. This study aims to determine the effect of the effect on NaOH concentration and contact time of iodine activation number and SMS surface area.Keywords: Biosorbent, NaOH, Spent Mushroom Substrate.
Perancangan Pembangkit Catu Daya Untuk Alat Pengukur pH Pada Limbah Cair Berbasis Solar Sel Yoga Pratama; Nurhalim Nurhalim; Feranita Feranita
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 use of electric power is one of the basic needs around the world, but there are some areas or places that are also not reached by electricity, such as in coal waste fields that require pH sensing to measure the quality standard of waste before disposal. The use of photovoltaic systems is an alternative to solve this problem. In this study, tests and measurements were carried out to determine the ability of the photovoltaic system as a power source for pH sensing. Measurement and testing on the prototype is carried out by applying varying loads and covering the surface of the solar panel which results in a change in the value of voltage and current. Based on the results of solar panel testing by covering the solar surface (shading), when the weather is clear with radiation of 812.4 W / m2 and a temperature of 33.7° C, the solar panels will stop filling the battery by closing 90% while in cloudy weather conditions with radiation of 242.4 W / m2 and a temperature of 31.9° C, solar panels will stop filling the battery by closing 40%. Keywords: photovoltaic, pH sensing, load variation, shading
Kaji Numerik Pengaruh Bio-Based Lubricant Terhadap Ketebalan Lapisan Film Dan Tekanan Elastohydrodynamic Pada Cylindrical Roller Bearing Menggunakan Metode Beda Hingga Adibyathul Fikri Januar; Dedi Rosa Putra Cupu; Nazaruddin Nazaruddin
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

In this research, numerical study are used to examine the effect of bio-based lubricants, i.e. coconut oil, olive oil, and palm oil as lubricants in the application of roller element bearings, or called elastohydrodynamic lubrication (EHL), especially in contact with the inner ring with cylindrical roller elements. This simulation applies the finite difference method to solve the Reynolds equation and the pressure-viscosity equation to analyze the EHL pressure and the thickness of the film layer formed. The results show that olive oil is the right choice in replacing mineral oil in the application of roller bearings. By providing variations in load and speed, olive oil shows the results of low pressure spikes or no pressure spikes during the simulation process. However, in general coconut oil and palm oil can replace mineral oil as a function of lubrication. As a comparison purpose, mineral oil (P150N) is used to see the difference that occurs in the EHL pressure and the thickness of the film layer formed. Keywords: elastohydrodynamic lubrication, film thickness, bio-based lubricant
Prarancangan Pabrik Metanol Proses Lurgi-Low Pressure Methanol Dengan Disain Alat Utama Destilasi Metanol Reno Susanto; Edy Saputra
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 demand for methanol continues to increase, it was recorded that in 2018 Indonesia imported 701,291.5 tons of methanol, which was the highest import compared to previous years. Methanol is widely used globally for industrial applications including acetic acid, formaldehyde, MTBE, polyvinyl, polyester and DME industries. The main raw material used in the manufacture of methanol with the Low Lurgi Pressure process is natural gas. This factory is planned to operate for 330 days per year and work continuously for 24 hours / day with a capacity of 200,000 tons / year which will be established in the Pelintung Industrial area, Dumai, Riau. The remaining time during the operation process is used for shutdown, plant maintenance, maintenance and repair of equipment. The design of the main equipment in this plant is the Methanol Distillation which functions to separate methanol from water. The distillation tower is operated at a pressure of 1 Bar and a temperature of 95 ° C. The economic analysis in this plant design shows that the methanol plant with the lurgi-low pressure methanol process with the main methanol distillation tool design is feasible to be established with a BEP value of 41% and a Payback Period (PBP). ) 3,008 years factory. Keywords: Methanol, Economic Analysis, Natural Gas,
Penyisihan Kandungan Nitrogen Total Pada Pome Menggunakan Chlorella sp. Dalam Flat-Photobioreactor Dengan Penambahan Kombinasi Konsentrasi Tembaga (Cu) Dan Seng (Zn) Shindi Unada; Shinta Elystia; Sri Rezeki Muria
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 mill effluent containing pollutants and has high content of organic matter. Organic material contained in palm oil mill effluent can be used as nutrition by microalgae Chlorella sp. and can reduce Total Nitrogen content in palm oil mill effluent. The nitrogen total removal process was carried out in a flat-photobioreactor with various concentrations of combinade Cu and Zn in the amount Cu are 0,1; 0,5; and 1,0 mg/L and Zn are 0,5 and 1,0 mg/L with contact times of 7 days. The results showed that at a combination of 1,0 mg/L Cu + 1,0 mg/L Zn, the highest microalgae cell growth was 4,86 x 106 cell/ml and the highest removal efficiency of organic matter of total nitrogen is 89,5% on the seventh day. Keywords: Chlorella sp., Cu, Zn, Total Nitrogen, flat-photobioreactor.
Simulasi Distribusi Termal Las Gesek Rotari Pada Penyambungan Mild Steel Berbasis Abaqus Andika Saputra; Yohanes Yohanes; Ridwan Abdurrahman
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 friction welding process occurs as a result of the direct conversion of mechanical energy in the form of friction into thermal energy. Thermal in the region near the peak joint has a significant effect on the formation of flash, the hot zone and the strength of the rotary friction welded joint. In this study, observations were made on the validation of the thermal distribution with the welding time reaching flash in experimental testing using a thermocouple sensor measuring instrument and the simulation using ABAQUS software. The test results will be carried out with a tensile test to see the maximum tensile strength of the variation of the chamfer angle 0 °, 15 °, 30 °, 45 °. The conclusions obtained are: (1) The form of thermal distribution from experimental and simulation testing is considered to be in accordance with the percentage error of the maximum thermal value of 37.55%. This is influenced by the slow thermal propagation on the friction surface. (2) Requirement of thermal distribution time in simulation and experimental testing, the shortest time is 59 seconds and 71 seconds at 0 ° chamfer angle and the longest time at 45 ° chamfer angle with 600 seconds and 494 seconds for simulation and experimental testing. This is influenced by the friction surface area and the small heat flux value. (3) The maximum tensile test results were obtained at a 45 ° chamfer angle of 505.53 MPa. Keywords: Rotary Friction Welding, Thermal Distribution, Abaqus
Sistem Monitoring Limbah Cair Berbasis Mikrokontroler Dengan Data Logger Di Pabrik Kelapa Sawit Ilham Ilham; Edy Ervianto
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

Temperature, Hydrogen Potential (pH), and Turbidity are important information to know to see the physical elements of liquid waste. This research was conducted using the Arduino Uno Microcontroller as a controller, temperature sensor (DS18B20), pH sensor, Turbidity sensor and SD card module for data logger and real time. The results of namely the pH sensor with an average error of 1.09%, the temperature sensor of 3.05% and the turbidity sensor of 3.46%. For the time of sending data from Arduino Uno to SD card every 30 minutes. the success of a measuring instrument that displays readings on a Liquid Crystal Display (LCD) and recording data stored on a memory card. From the test results to the field, data obtained the average value of the pH sensor voltage reading of 2.89 volts with the average pH value being read by the pH sensor of 5.30, for the average value of temperature sensor readings of 37 °C and for average The average voltage reading on the turbididy sensor is 2.55 volts with an average turbidity level of 296 NTU. Keywords: Arduino Uno Microcontroller, Turbidity Sensor, pH Sensor, Temperature Sensor, and Data Logger
Prototype Smart Greenhouse Untuk Tanaman Aglaonema Dengan Sistem Monitoring Berbasis IoT Afriantoni Afriantoni; Ery Safrianti
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

Internet of Things (IoT) is a concept for exchanging data through the internet with objects that can be controlled remotely. Aglaonema plant is one of the ornamental plants that is much in demand by many as aplant for indoor decoration and terrace houses. It's just that the aglaonema plant to grow nice and beautiful requires a lot of attention. This research designed a system to monitor soil moisture and automatic roof on aglaonema plant through web server and android notifications. The device consists of Arduino Uno, soil moisture sensor, RTC, servo, and limit switch. Checking the soil moisture and opening the roof is done 2 hours in the morning and 2 hours in the afternoon. The roof is opened with a servo, and the limit switch is used to notify if the roof cannot open in time. Monitoring via the web is done using thingspeak and android notifications using IFTTT.Keywords: Monitoring, soil moisture sensor, IoT, Notificaton
Desain Reaktor Polimerisasi Prarancangan Pabrik Acrylonitrile Butadiene Styrene (Abs) Dengan Proses Emulsion Selsa Idillah; Sri Helianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract

Acrylonitrile Butadiene Styrene (ABS) is a copolymer composed of polymerization styrene, acrylonitrile, and polybutadiene. Excellent toughness, good dimensional stability, and chemical resistance are ABS properties that are appealing. ABS is regularly used to make lightweight, rigid, and malleable products such as medical devices, cosmetics, household appliances, cabinets, bathtubs, pipes, and vehicle components. Consumption of plastics will continue to increase by 5% per year in Indonesia. Demand for ABS has increased significantly with imports, our final project is proposed to design an ABS plant that meets 10% of domestic ABS needs. Also, the establishment of this factory was based on advancing Indonesia's economic sector and allocates jobs for local labor. The ABS plant construction is going to hold for three years in 2022-2025. It is planned to be located in the Tanjung Buton industrial area, Riau, with a capacity of 115.000 tons/year. This capacity is to meet domestic needs and the Asia market. The ABS Emulsion Process consists of 3 stages; polybutadiene synthesis, the grafting polymerization reaction stage, and the product separation stage. The main design of this paper is polymerization reactor (R-102), which is Continuous Stirred Tank Reactor (CSTR) type. The operating conditions in the reactor were 73 oC and 21.67 psi. Economic analysis is also taken into account to determine whether the factory is feasible. From the economic analysis, we obtained a payback period (PBP) of 1 year, an Internal Rate of Return (IRR) of 22.75%, an Return On Investment (ROI) of 49.45%, and a Break-Even Point (BEP) of 51%, based on the feasibility analysis, it shows that the ABS plant project is feasible. Keywords: acrylonitrile, butadiene, styrene, economic analysis, plant design
Efesiensi Dan Kapasitas Biosorpsi Logam Cu (II) Menggunakan Sisa Media Jamur Coprinus Comatus Teraktivasi HCl Chrysty Elesa Hutauruk; Elvi Yenie; Said Zul Amraini
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 development of industries that produce volumes of waste produced, which one is copper, Cu (II). Cu (II) can be dangerous and toxic to human and the environment. This study aims to utilize spent mushrooms subsrate (SMS) Coprinus comatus removing Cu (II) metal in electroplating wastewater. Biosorbent spent mushrooms subsrate (SMS) was activated using HCl. Variation concentrations of HCl (0.1; 0.5; and 1 N) in contact activation time 15 minutes. The results show that biosorbent was activated using HCl at concentration 0.1 N in contact activation time 15 minutes has high efficiency is 13.90%. Keywords: Biosorption, spent mushrooms subsrate, concentrations of HCl, contact activation time , Cu (II), electroplating wastewater.

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