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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Teknologi Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika
Mardiyanto, Arief
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Kinerja Insinerator Menggunakan Sistem Monitoring Suhu dan Gas Buang Gunawan, Gunawan; Supardin, Supardin; Idwar, Idwar; Rahmawati, Rahmawati; Mardiyanto, Arief
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6662

Abstract

Waste management is a challenge because landfills are almost full. Incineration is a vital solution in waste management because it can significantly reduce waste volume and eliminate hazardous substances through a high-temperature combustion process of at least 600 °C, thereby helping to reduce waste accumulation in landfills and its impact on the environment. Monitoring temperature and exhaust gas is essential to ensure combustion efficiency and maintain emissions within safe limits. This study aims to design and implement an accurate real-time monitoring system to support incinerator management to be more efficient and environmentally friendly. Temperature monitoring uses a thermocouple sensor and the MAX6675 module, exhaust gas emissions use MQ7 and MQ135 sensors to detect CO and CO2. The thermocouple sensor used has an accuracy level of 99.23%, while exhaust gas monitoring uses an MQ-135 sensor to measure CO2 with an accuracy of 98.93 % and an MQ-7 sensor for CO with an accuracy of 92.14 %. No-load incinerator temperature testing showed a peak temperature of 323 °C, which then decreased due to fuel depletion. Testing with waste load showed the temperature increased more slowly but reached a higher peak of 616 °C. During the combustion process, CO content increased to 150 ppm during incomplete combustion, while CO2 peaked at 6,000 ppm and then decreased as complete combustion progressed. Future expectations require improvements in air flow regulation and the application of a scrubbing system to optimize combustion and reduce emissions.
Desain Kendali Otomatis Prototype Inlet-Outlet Air Limbah KPPL Rahmawati, Rahmawati; Amra, Siti; Kamal, Muhammad; Mardiyanto, Arief
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 1 (2025): April
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i1.11701

Abstract

Wastewater treatment and retention ponds (KPPL) in industry play a crucial role in waste management. Controlling the inlet and outlet valves is essential to maintain flow balance and process efficiency. Currently, the KPPL at PT.X uses a manual method in valve control that relies on visual observation and sampling, which is limited in accuracy and responsiveness. Therefore, it is necessary to design an automatic valve control prototype to improve the performance of the wastewater treatment system at PT. X. This study aims to build an automatic control system that uses level and pH sensors and a DC motor to regulate wastewater flow. This system uses hysteresis on-off control to prevent excessive energy consumption and extend component life by reducing the frequency of valve opening and closing. The ultrasonic sensor detects the water level, while the pH sensor monitors the water quality before being discharged into the sea. Testing shows the accuracy of the sensors, with an average error of 0.94% for the level sensor and 0.9% for the pH sensor. Hysteresis control keeps the pump and motor off when the water level is within the safe range, which increases efficiency and reduces wear. This system provides more precise control over wastewater flow, ensures safe and environmentally friendly disposal, and reduces manual intervention and the risk of operational errors.Keywords— hysteresis, on-off control, KPPL, pH, ultrasonic sensor
Analisis Konstanta Dielektrik menggunakan Sensor Kapasitif untuk Pemurnian Biodiesel Rahmawati, Rahmawati; Mardiyanto, Arief; Amra, Siti; Hanafi, Hanafi; Gunawan, Gunawan; Mawardi, Al
Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika Vol. 20 No. 2 (2023): Jurnal Litek, September 2023
Publisher : Jurusan Teknik Elektro Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/litek.v20i2.25

Abstract

Biodiesel pengganti solar diproduksi melalui reaksi transesterifikasi atau alkoholisis antara trigliserida (minyak nabati) dengan metanol (reaktan) untuk menghasilkan fatty acid methyl ester (FAME) yang dikenal dengan nama biodiesel dan gliserol. Biodisel dan gliserol dipisahkan menghasilkan biodiesel yang disebut dengan biodiesel kotor. Pemurnian biodiesel untuk menghilangkan pengotor yang tidak diinginkan sangat penting dan merupakan teknologi kritis yang sangat dibutuhkan. Proses pemurnian dilakukan dengan proses pencucian dan evaporasi. Proses pencucian biodiesel bertujuan untuk menghilangkan sisa kotoran yang tertinggal atau pengotor lainnya yang tidak ikut bereaksi selama reaksi transesterifikasi. Permasalahan yang diteliti adalah bagaimana sensor dielektrik dapat digunakan untuk monitoring proses pencucian biodiesel secara real time. Untuk itu terlebih dahulu dilakukan pengukuran konstanta dielektrik menggunakan sensor dielektrik berupa sensor kapasitif. Biodiesel hasil transesterifikasi masih mengandung pengotor antara lain sisa air, gliserol dan metanol. Sifat dielektrik memiliki korelasi kuat dengan sifat umum dan kimia biodiesel. Untuk mengukur kualitas selama proses pemurnian dapat menggunakan sensor dielektrik, karena sifat dielektrik memiliki korelasi terhadap sifat fisik dan kimia biodiesel. Pelaksanaan penelitian meliputi pengukuran konstanta dielektrik masing-masing komponen biodiesel, air, gliserol dan methanol serta biodiesel pada berbagai persentase kandungan air. Tujuan utama penelitian adalah menghasilkan pengukuran konstanta dielektrik biodiesel dan sisa pengotor pada proses pencucian biodiesel. Metode yang digunakan dalam penelitian ini adalah metode eksperimental dengan menyajikan hasil pengamatan konstanta dielektrik dalam bentuk tabel dan grafik kemudian dibahas secara deskriptif. Pengukuran konstanta dielektrik biodiesel, air, gliserol dan methanol menggunakan LCR meter. Hasil pengukuran konstanta dielektrik biodiesel, metanol, gliserol dan air adalah 4.53, 32.02, 42.28 dan 77.03 berturut-turut pada frekuensi pengukuran 100 kHz. Konstanta dielektrik biodiesel meningkat dengan meningkatnya kandungan pengotor pada biodiesel. Ditentukan persamaan regresi linier di mana variabel x sebagai kandungan pengotor dan variabel y sebagai nilai dielektrik. Nilai dielektrik biodiesel untuk kandungan pengotor adalah y=0,01x2+0,021x+4,1 (metanol), y=-002x2+0,3x+4,3 (gliserol), y=0,005x2+0,05x+4,5 (air). Konstanta dielektrik biodiesel meningkat dengan meningkatnya kandungan pengotor dalam biodiesel.
Co-Authors Al Mawardi Amra, Siti Gunawan Gunawan Hanafi Hanafi Idwar, Idwar Muhammad Kamal Rahmawati, Rahmawati Supardin Supardin, Supardin