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Jurnal Teknologi
Published by Universitas Muhammadiyah Jakarta
ISSN : 20851669     EISSN : 24600288     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering
This journal is a scientific journal to develop knowledge in the field of Engineering & Technology. Editors invite professionals from education and researcher to write about the progress of science in the field of Engineering & Technology. The journal is published 2 (two) times in 1 year.
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Articles 21 Documents
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Search results for , issue "Vol 15, No 1 (2023): Jurnal Teknologi" : 21 Documents clear
DAUR ULANG LIMBAH KEMASAN MULTILAYER SEBAGAI BAHAN PEMBUATAN TAWAS UNTUK MENURUNKAN PARAMETER PENCEMAR INDUSTRI TAHU Novi Eka Mayangsari; Tarikh Azis Ramadani; Nella Maulidiyatul Jannah; Dika Rahayu Widiana
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.97-103

Abstract

An increase in population will have a major impact on the environment, such as an increase in the volume of waste. The second largest composition of waste after food waste is plastic waste, which is a type of waste that is difficult to decompose. One of them is coffee packaging plastic waste. Recycling is a way that can be done to reduce coffee packaging plastic waste, namely by separating the plastic layer and the aluminum layer. The aluminum layer can be processed into alum. The purpose of this study is to separate the plastic layer and aluminum layer using the green solvent method using methanoic acid, the effect of variations in the concentration of KOH with a concentration of H2SO4 6M, and determining the optimum dose in reducing COD and BOD levels in wastewater tofu industry. The results showed that with the variation of the higher concentration of KOH, the yield of alum produced was also higher. Alum research results were compared with commercial alum. Comparison of these two types of alum shows that alum produced in this study resulted in higher COD and BOD removal efficiency than commercial alum, but with different coagulant doses.
PENGARUH FORMULASI EDIBLE COATING DARI PATI PISANG RAJA BULU TERHADAP PENGHAMBATAN GEJALA CHILLING INJURY PADA TOMAT MERAH Mela Perdana Sunarso; Nurul Hidayati Fithriyah; Ratri Ariatmi Nugrahani
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.73-80

Abstract

As an agricultural country, Indonesia still prioritizes the agricultural sector as one of the industries that play an essential role in supporting the country's economic growth. One of the priority commodities is tomatoes. Tomatoes are very susceptible to damage. This damage will significantly affect the quality of the tomatoes before they reach consumers. It is necessary to have proper post-harvest handling so that tomatoes still have the quality that is always maintained, one of which is cold storage, which has done to lower the temperature of the product so that it will slow down the respiration rate before further post-harvest handling has carried out. However, storage at too low temperatures can cause chilling injury so that the quality of tomatoes decreases. The edible coating method by dipping is an alternative to delay ripening so that it inhibits the metabolic process. This study aimed to determine the effect of storage time and temperature on edible coatings on tomatoes. The research method begins with manufacturing an edible coating solution from Raja Bulu banana starch. With a factorial CRD (Completely Randomized Design) consisting of two factors. The first factor is the storage temperature which consists of two levels, namely refrigerator temperature (0-4áµ’C), chiller temperature (10-15áµ’C), and the second factor is storage time with five levels, namely storage time (2 days; 4 days; 6 days; 8 days and 10 days), so in this study, there is a factorial of 2 x 5 combinations with three replications. The analysis test of the sample results consisted of a weight loss test, color test, organoleptic, and regression analysis. The results obtained on tomatoes with an edible coating indicate a real and significant effect on the inhibition of chilling injury. This study proves that tomatoes given an edible coating using Raja Bulu banana can maintain their quality in cold storage and inhibit chilling injury in tomatoes.
PROTOTYPE SISTEM PENIMBANGAN OTOMATIS PADA MODEL KERNEL BULK BERBASIS ARDUINO UNO Ahmad Mahfud; Muhammad Ali Kahfi Nasution
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.43-50

Abstract

Kernel Bulk is a temporary shelter for kernels produced at the Palm Oil Mill, before sending process to buyers. The problem is, it is not known exactly how many production kernels have been produced and collected in Kernel Bulk. Daily kernel stock measurements are usually carried out in the Kernel Storage. which can only be done the next day when the factory has stopped processing. The Automatic Weighing System Prototype is designed to provide convenience in monitoring kernel production results at any time. It is hoped that the system will be able to provide measurement data quickly and in real time. By using the Kernel Bulk model as used in the factory, as well as the use of several sensors and controllers as system controllers. In this study, four Loadcells were used as Kernel weight measuring sensors, as well as the HX711 Module signal amplifier to send measurement data to the microcontroller. Arduino Uno R3 is embedded in this prototype as a controller that functions to read sensor measurement results and provide instructions for the next stage of measurement. The Liquid Crystal Display is embedded in the panel box, to make it easier to read the measured weight. The results showed that the automatic weight measurement system worked well, with a bulk capacity of 4.7 kg, a volume of 0.008 m3, a bulk load mass of 4.7 kg, a leg strength of 70 MPa, and an electromotor with a voltage of 220 VAC, 0.2A with a rotating output of 10 RPM. The level of accuracy of mass measurement is 93.9817%.
PEMBUATAN BIODIESEL DENGAN REAKTOR BERSIRKULASI SEDERHANA MENGGUNAKAN KATALIS KOH Rudi Hartono; Yus Rama Denny; Deni Sulaiman Ramdhani; Lusiani Dewi Assaat; Agie Wildha Priakbar; Wusda Hetsa Ribawa
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.123-132

Abstract

The high use of petroleum causes petroleum reserves to deplete, this is because petroleum is a natural resource that cannot be renewed. The purpose of this research is to make biodiesel using a simple circulating reactor and analyze biodiesel so that biodiesel is obtained which is suitable for use and according to general biodiesel standards. This research is limited by several variables consisting of fixed variables, namely raw materials in the form of 20 liters of used cooking oil, 100 g of KOH catalyst, and a reaction temperature of 600C, while the independent variables are the circulating stirring time for 55, 60, and 65 minutes, and the ratio feeds were 17% v/v and 21% v/v methanol. The stages of research carried out are preparation of raw materials, manufacture of biodiesel, and testing of biodiesel. Preparation of raw materials by preparing used cooking oil, KOH catalyst and methanol. Biodiesel production is carried out in a simple circulating reactor. The biodiesel tests carried out were density, viscosity, Free Fatty Acid (FFA) levels, Flash Point, Pour Point, cetane numbers, and Heat Heating Value (HHV). The research that has been done has produced biodiesel that complies with the SNI biodiesel standard. The density of biodiesel produced is in the range of 856.4-868.4 kg/m3. The resulting viscosity ranges from 2.98-3.41 cSt. The cetane number ranged from 57.3 to 58.2. Flash point ranges from 39.5-150.5oC. The pour point is around 9oC and the HHV is 9371-9490 kcal/kg. Generally, the yield of biodiesel produced is 75-90%. The optimum conditions for making biodiesel are at a variation of 17% v/v methanol with a reaction temperature of 60oC and a reaction time of 55 minutes.
RANCANG BANGUN SISTEM PELONTAR TIPE CATAPULT UNTUK WAHANA TERBANG TIPE FIXEDWING ATHA MAPPER 2300 Kaspul Anuar; Imam Nugraha; Musthafa Akbar; Nazaruddin Nazaruddin; Warman Fatra
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.13-24

Abstract

Atha Mapper 2300 is a fixed wing aircraft, which is the next generation of Atha Mapper 2150. In order to finish its mission, the aircraft used to take off by hand launch method. Hand launch method utilize the throwing force of the launch operator to take off. The method has many issues, such as low safety degree, and inconsistent take off angle and speed. The purpose of this research are to design a launcher for Atha Mapper 2300 UAV, to determine the structural strength for Atha Mapper 2300 launcher system, to produce the designed launcher system, and to find out the performance of the produced launcher system. The design process was based on the Atha Mapper 2300 specification, which are 2300 mm of wingspan, MTOW: 6 Kg, and 10 m/s of stall speed. The result of the design was a launcher system with dimension of 3000 mm length, 1400 mm wide, 900 mm height, and 14o inclination angle. The launcher system was a catapult type launcher with 30 x 60 x 1.2 mm hollow stainless steel as its main material, and has a total mass of 11.162 Kg. The structural strength calculation resulted a criteria fulfillment of 113.4. The calculation also resulted a maximum launch speed of 11.658 m/s. Then, practically the produced launcher result a maximum launch speed of 12.116 m/s which is relatively close to the theoretical calculation. The speed fulfill the initial criteria which is ≥ 11.5 m/s. By these results, the launcher system was claimed to be successfully help Atha Mapper 2300 to have a stabilized take off.
PEMANFAATAN UAP KELUARAN EVAPORATOR UNTUK PENGERINGAN AMPAS TEBU BAHAN BAKAR PABRIK GULA Azrul Syamsu; Nurul Hidayati Fithriyah; Ratri Ariatmi Nugrahani
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.151-158

Abstract

Have been factors that influence on the use of the baggase as fuel. One of them is water contained in the baggase. A sugar factory in Lampung Tengah district is PT Gula Putih Mataram, produce baggase in contained water by 50,10%. The purpose of this research is to know the number of water to levels unloaded on baggase by using heat from steam exodus evaporator. know influence the flow hot air to the water level of optimal for flow of steam exodus evaporator, used to draining bagasse. Know time drying to influence the water level and time best of process of drying bagasse, use of heat from the exodus steam evaporator. And the research methodology used data processing. Where data is collected of direct observation in PT Gula Putih Mataram, and study literature in the form data of a journal before. Using a hot vapor exodus evaporator in heat exchanger, rate obtained hot air flow 36.296,62 kg/hours, with 40°C temperature. Next hot air is used as air dryer in rotary dryer. Air dryer to flow of 32 tons/hours, 33 tons/hours, 34 tons/hours, 35 tons/hours and 36 tons/hours, obtained the the water level of 45,05%; 44,89%; 44,73%; 44,58% and 44,42%. With sample 36 tons/hours take 5 sample drying time. That is 1 hours, 2 hours, 3 hours, 4 hours and 5 hours, and is found the water levels by 44,42%; 38,74%; 33,06 %; 27,38% and 21,70%. Of the results of data processing shows variations in the drying time flow hot air and give a linear variation to the moisture content of reduced the number. Where the bigger the flow air dryer will increase the moisture content of which can be reduced. And time for drying, the longer the drying hence the larger the to amount to the moisture content of which can be reduced.
PERANCANGAN ALAT PENDETEKSI BANJIR DENGAN MEMANFAATKAN TINGGI MUKA AIR SKALA LABORATORIUM Yoggi Hendra Safutra; Meilani Belladona; Tri Sefrus
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.25-32

Abstract

Flood is one of the disasters that often hit in Indonesia which can occur every year. Flood is a natural disaster event that occurs when a water flow can no longer accommodate the volume of water. The flooding that occurred in Bengkulu City, especially in the prosperous swamp sub-district area, was caused by the high activity of the Bengkulu watershed due to coal mining upstream of the Bengkulu River Basin which had been carried out for a long time. The problem in this research is how to design a flood detector using laboratory scale water level. The purpose of the research to be carried out is to design a simple laboratory-scale flood detection mitigation tool that is useful for knowing the amount of water level rise in the Bangkahulu estuary river when a flood will occur. The method used in this study is the collection of primary data and secondary data on the Bangkahulu estuary river which will be scaled to obtain the results of making tools. The results of this study found that the normal water level at the research location was 3m, the height before the flood was 5.9 m, the height at the time of the flood was 8.44 m. A flood detection device has been tested, on a normal water level the device sounds with a time of 1 minute 46 seconds, discharge 0.18 liters/second, the water level alerts the tool sounds with a time of 1 minute 42 seconds, water discharge 0.18 liters/second and the water level is dangerous tool sound with a time of 1 minute 24 seconds water discharge 0.19 liters / second. This laboratory-scale flood detection tool can be a means of educating the community to minimize the impact of a flood disaster that can be understood by the community.
RANCANG BANGUN FAN UNTUK ELECTRIC DUCTED FAN (EDF) DAN ANALISIS PERFORMANYA Buyung Junaidin
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.133-140

Abstract

In aviation, electric propulsion has long been applied, one of which is the electric ducted fan (EDF). In Indonesia, initially, EDF was mostly used for the propulsion of aeromodelling aircraft for hobby purposes. LAPAN initiated the use of EDF as a drone propulsion which flown since 2013. In addition, EDF is also used in the Indonesian Rocket and Rocket Payload Competition (KOMURINDO). KOMURINDO is an annual competition for the design of rocket payloads and Electric Ducted Fan (EDF) rockets at the university level which has been held by LAPAN since 2009. In the EDF rocket competition, EDF is a secondary part of the competition because it is not required to design and build so the participants prefer products ready to use all of which come from abroad. This limits the participants in designing the EDF rocket because, in the design, the EDF specifications must be following the initial design requirements specified. Therefore, this research needs to be carried out as a first step in understanding the design process for the development of EDF. The fan is the main part of the rotating EDF or also called the rotor. Fan plays a vital role in generating thrust through accelerating airflow, so it is necessary to design to produce a fan that suits your needs. The design method used in this research is a combination of the thrust equation for the rotor and the blade element theory. The CFD method is used to analyze the performance of the designed fan which is compared with the experimental test results with the EDF test bed. The results of the design obtained that the EDF fan geometry which produces a thrust based on CFD analysis is much smaller than an initial estimate using the analytical method, it is necessary to carry out an optimization process in the process of determining the fan geometry with a better method so that the resulting thrust is following the initial estimate. The results of the EDF test show that the thrust produced by the EDF is smaller than the results of the CFD analysis, this can be due to the less optimal distance between the fan tip and the duct wall on the EDF being tested due to manufacturing results, causing the appearance of a tip vortex which reduces fan performance. In addition, the flow resistance of the duct surface is not smooth due to the manufacturing process. The CFD method can be the first step to determine the performance of the fan or EDF before proceeding to the prototype testing process because the CFD results are close to the test results.
PERANCANGAN SISTEM MEKATRONIKA PADA MESIN PEMOTONG RUMPUT MENGGUNAKAN HYBRID ENERGY Aljufri Aljufri; Abdul Rahman; Reza Putra
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.57-64

Abstract

This design aims to apply mechatronics technology to a lawn mower. The test includes energy source, transmission capability and comparison of energy consumption with conventional engines This lawn mower design uses a battery with a voltage of 12 volts with a current of 7.2 Ah. The control system is with a frequency of 315 Mhz. Actuators consist of three namely, cutting motor, transmission drive motor and servo motor. Charging the battery uses a hybrid system, namely a solar cell with a capacity of 10 wp and an electric charger of 72 Watts. The engine can operate depending on the power used with a vulnerable time of 50 minutes to 75 minutes per charge. The fastest time when testing at a grass height of 20 mm with a work duration of 6 minutes 15 seconds while the longest time at a grass height of 60 mm for 11 minutes 30 seconds. The charging time of the battery using the longest solar cell on the fourth day for 11 hours and 43 minutes, while the fastest time on the fifth day is during for 6 hours and 42 minutes. For charging using charging a charging time of 1 hour 12 minutes. This machine is more efficient up to 59,000 per month with the same parameters as conventional machines
RANCANG BANGUN ALAT PENDETEKSI DINI OVER HEAT MESIN KENDARAAN MELALUI SUHU AIR PENDINGIN Alex Surapati; Arif Kurnia; Indra Agustian
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.33-42

Abstract

There is currently no cooling system in the vehicle's engine using voice and display instructions that warn the driver that the engine's working temperature has passed a predetermined threshold. To overcome the problems described previously, research was carried out. The result of this research is a tool or device that can detect if there is overheating in the vehicle engine using the DS18B20 sensor. In this tool a warning system is given with voice commands and a display that shows the state of the engine's working temperature at that time. In this study, the Kalman Filter method was used to reduce noise in temperature measurements by the DS18B20 sensor. The results of measuring changes in the average temperature using the Kalman Filter method are 0.019 ° C and without the Kalman Filter method are 0.58 ° C. Based on the results of these comparisons using the Kalman Filter method the temperature measurement noise obtained is smaller.

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