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All Journal Jurnal Edukasi Elektro Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Journal of Science and Applicative Technology Jurnal Teknik Kimia Scientific Journal of Mechanical Engineering Kinematika Jurnal Abdi Masyarakat Indonesia AMMA : Jurnal Pengabdian Masyarakat Molekul: Jurnal Ilmiah Kimia
Zen, Muhammad Rizky
Teknik Sistem Energi, Institut Teknologi Sumatera, Lampung Selatan – Indonesia
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health

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Breakdown of Water-in-Oil Emulsion on Pyrolysis Bio-Oil Muhammad Rizky Zen; Susila Arita; Leily Nurul Komariah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 2 (2019): June 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i2.53

Abstract

The pyrolysis bio-oil which has been studied by many researchers has typically contained a high amount of water, around 20-30%. In this research, the effective bio-oil purification using chemical demulsification method has been studied to reduce the amount of water by breaking down the water-in-oil emulsion on pyrolysis bio-oil. A various dosage of chemical demulsifier (100 ppm, 150 ppm, 200 ppm, and 250 ppm) has been added into the pyrolysis bio-oil and the water separation over time also been observed. The temperature of bio-oil (30, 40, 50, 60, and 70 °C) was also studied as a factor that could have a significant effect on the demulsification process of pyrolysis bio-oil. After the injection of 250 ppm of demulsifier at 30 °C, the water separation reached a maximum of 72% in 60 minutes and could reduce the water content from 25% to 8.5%. At the temperature of 60oC and 250 ppm of demulsifier, the water separation reached a maximum of 96% in 35 minutes, and successfully reduced the water content from 25% to 1.3%. Finally, it has been concluded that this bio-crude purification using chemical demulsification method could be applied to effectively reduce the amount of water from pyrolysis bio-oil product.
Optimalisasi jaringan penukar panas untuk sistem energi yang efisien pada pabrik pengolahan LPG Muhammad Rizky Zen; Khoirun Naimah
Jurnal Teknik Kimia Vol 28 No 2 (2022): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v28i2.1011

Abstract

Krisis energi yang terjadi saat ini menunjukkan semakin tingginya tingkat konsumsi energi yang semakin lama semakin tidak sebanding dengan ketersediaan energi yang ada. Permasalahan ini menuntut setiap industri di dunia untuk dapat mengoptimalkan dan mengefisienkan penggunaan energi untuk keperluan proses produksinya. Penelitian ini bertujuan untuk mendapatkan desain jaringan penukar panas yang optimal sehingga dapat menurunkan tingkat konsumsi energi serta meningkatkan efisiensi dan efektifitas penggunaan energi pada pabrik pengolahan LPG. Pinch analysis merupakan suatu metode yang dapat digunakan untuk mengoptimalisasi jaringan penukar panas dengan memanfaatkan prinsip heat recovery. Pengambilan data operasi pabrik pengolahan LPG yang memuat informasi laju alir, tekanan, dan suhu dari setiap aliran proses dilakukan untuk pembuatan simulasi proses dengan menggunakan aspen hysys dan kemudian dilanjutkan dengan ekstraksi data ke aspen energy analyzer. Setelah jaringan penukar panas dioptimasi dengan cara menambahkan satu buah alat penukar panas yang baru yaitu E-105, terjadi penurunan konsumsi energi pada aftercooler sebesar 51,52 %, chiller sebesar 55,68 %, dan juga penggunaan heater dapat dihilangkan sehingga terjadi pengurangan energi sebesar 2.455 kW. Dari hasil studi ini, maka dapat disimpulkan bahwa dengan melakukan optimasi jaringan penukar panas dengan menggunakan pinch analysis, terjadi penghematan energi total sebesar 31,41 % atau 4.908 kW dan juga penghematan biaya signifikan pada proses pengolahan LPG.
Produksi dan Manajemen Energi Biogas dari Kotoran Sapi sebagai Pengganti LPG di Kampung Totokaton, Lampung Tengah Khoirun Naimah; M. Rizky Zen; Ilham Arirohman; Achmad Gus Fahmi; Kiki Yuli Handayani; Muhammad Khanafi; Fahmi Sapta Hadi; Apriansyah Julio; Hotdimas Simanjuntak; Siti Muslimah
Jurnal Abdi Masyarakat Indonesia Vol 2 No 6 (2022): JAMSI - November 2022
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.562

Abstract

Kampung Totokaton merupakan salah satu dari 9 Kampung yang berada di wilayah kecamatan Punggur, kabupaten Lampung Tengah, Provinsi Lampung yang termasuk dalam wilayah menengah kebawah yang sulit mendapatkan akses bahan bakar LPG. Kampung Totokaton mempunyai potensi biomassa yaitu limbah kotoran ternak sapi yang cukup banyak yang dapat dimanfaatkan sebagai sumber energi bahan bakar biogas. Limbah kotoran sapi tersebut selama ini belum dapat termanfaatkan dengan maksimal. Oleh karena itu, tim pengabdian masyarakat ITERA melakukan pembangunan instalasi teknologi reaktor biogas berukuran 4 m3 yang digunakan untuk mengkonversi kotoran sapi menjadi sumber energi terbarukan pengganti LPG yang lebih ekonomis dan ramah lingkungan. Adapun pelaksanaan pengabdian yang dilakukan adalah observasi/survei lokasi, kerjasama dengan mitra, pembangunan instalasi biogas, monitoring/evaluasi, dan pelaporan. Hasil dari program pengabdian masyarakat ini adalah reaktor biogas dengan warna nyala api yang dihasilkan berwarna biru yang menandakan kualitas biogas yang dihasilkan secara visual tidak berbeda dengan gas LPG yang selama ini digunakan. Kandang sapi juga terlihat menjadi lebih bersih. Hal ini berarti dengan adanya penerapan teknologi tepat guna biogas sangat membantu warga dan selangkah lebih maju dalam hal kemandirian energi. Hasil analisis survei kepuasaan masyarakat menunjukkan hampir 95% yang menyatakan sangat puas dan merasa sangat terbantu dengan kehadiran Tim pengabdian masyarakat ITERA.
Pengaruh Preparasi Ubi Kayu dengan Metode Bahan Baku Langsung dan Tidak Langsung terhadap Produksi Bioetanol Khoirun Naimah; Muhammad Rizky Zen
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.428

Abstract

Dalam penelitian ini, pengaruh metode langsung dan tak langsung pada bahan baku ubi kayu terhadap kuantitas dan kualitas produk bioetanol telah dipelajari. Pengukuran terhadap volume produk, pH, dan Indeks bias dari produk juga telah dilakukan untuk mengetahui karakteristik dari produk bioetanol. Dari 1000 gram ubi kayu, volume bioetanol yang dihasilkan dengan metode bahan baku langsung adalah 19 mL, sedangkan untuk metode tak langsung adalah 3 mL, kemudian untuk nilai pH, kedua metode menunjukkan hasil yang sama yaitu 6. Untuk nilai indeks bias pada produk bioetanol dengan metode langsung dan tak langsung adalah 1,3421 dan 1,337. Pada penelitian ini dapat disimpulkan bahwa preparasi ubi kayu dengan metode bahan baku langsung dalam produksi bioetanol lebih baik dibandingkan dengan metode tidak langsung dari segi jumlah bioetanol yang dihasilkan.
Life Cycle Assessment in Crude Palm Oil Production: Optimization of Oil Extraction Rate Muhammad Rizky Zen; Agus Adi Putra; Uswatun Mujahidah; Michelle Maria Magdalena Napitupulu; Chairunnisa Noviarini; Muhammad Miftahur Rahman
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.513-526

Abstract

Indonesia, as the foremost producer of palm oil globally, faces crucial environmental challenges. Besides palm oil production plays an important role in economic growth and national development, it also has environmental consequences from the production process. Crude Palm Oil (CPO) Industries face challenges balancing economic growth and environmental sustainability. This research carries out an environmental impact analysis of CPO production with the Life Cycle Assessment method using openLCA software 2.03 with CML-IA Baseline and ReCiPe 2016 Midpoint (H). Scope of this research adopts cradle-to-gate analysis with declaration unit of 1 kg CPO product. In this analysis, it was found that CPO production had a significant impact on GWP, Terrestrial Eco-toxicity Potential, and Land Use Change. So this research also explores the environmental impact of increased Oil Extraction Rate (OER) scenario with an OER of 21% and 22% compared to OER in current production activities. The research showed that all impacts decreased when OER was increased, impacts decreased of around 3% at OER 21% and decreased of around 8% at OER 22%. These findings confirm the potential feasibility of implementation based on increasing OER in the Palm Oil Industry to achieve targets for sustainable improvement. 
Environmental Performance of Ammonia Production in Indonesia using Life Cycle Assessment Approach Muhammad Rizky Zen; Agus Adi Putra; Michelle Maria Magdalena Napitupulu; Chairunnisa Noviarini; Fano Alfian Ardyansyah; Cahaya Prautama
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.480-491

Abstract

Ammonia is a fundamental component in fertilizer and chemical manufacturing processes around the world, but its production is a significant contributor to CO2 emissions in chemical industry. Implementation of carbon capture utilization and storage (CCUS) offers an alternative decarbonisation strategy to mitigate CO2 emissions in ammonia production. This study assesses the environmental performance of ammonia production through life cycle assessment (LCA) methodology. Environmental impacts are calculated using openLCA software with various impact assessment methods, including CML IA Baseline, Impact 2002+, Recipe 2016 Midpoint (H), and AWARE. The study scope encompasses the cradle-to-grave analysis, from the extraction of raw materials and transportation to ammonia production, main processes, distribution, and consumer product consumption, with a declared unit of 1-kg ammonia product. Our findings showed that CO2 removal and Power Plant in core processes in the core process as the most significant contributors to Global Warming Potential. Therefore, sensitivity analysis was conducted by reducing CO2 emission by 10% and 70% through CCUS implementation. The results showed that the CCUS implementation could reduce Global Warming Potential by up to 43%.
Analysis of Electrical Energy Consumption in Office Buildings of the Institute Technology of Sumatra in Energy Conservation and Efficiency Efforts Naimah, Khoirun; Arirohman, Ilham Dwi; Zen, Muhammad Rizky; Wicaksono, Rihardian Maulana; Soelami, F.X. Nugroho; Rahmatullah, Abri; Purba, Leonardo D.; Gaol, Javeni Eysama L.
Jurnal Edukasi Elektro Vol. 7 No. 2 (2023): Jurnal Edukasi Elektro, Volume 7, Nomor 2, 2023
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v7i2.65003

Abstract

Electrical energy is one of the basic human needs in carrying out various activities or daily activities, especially in office buildings such as office buildings of state higher education institutions, namely the Sumatra Institute of Technology (ITERA). Office buildings are the third highest consumer of electrical energy after shopping centers and hotels. The high demand for electrical energy requires the user sector to make efficiency in energy use. Before making efficiency, it is necessary to know the profile of electrical energy consumption including energy consumption intensity (ECI) and significant energy users. Therefore, in this study, an analysis of electrical energy consumption in each ITERA office building was carried out, through observation and interviews according to SNI / ISO 50002: 2018 energy audit procedures. The results obtained show that the total energy use of the 6 largest buildings (A, B, C, D, E, and F) in May 2023 is 144768 kWh and from the calculation of the ECI value is in the very efficient category (7.44 kWh/m2/month). From 6 existing buildings, there are 3 buildings that are very efficient, 1 building is efficient, and 2 buildings are quite efficient. Then, significant energy users were found by 83% in building C AC. Recommendations for saving energy in the effort of energy conservation and efficiency that can be done include, making changes in habits / patterns of use of electrical energy user equipment, especially in air conditioners and dispensers, so as to save electricity 2-21%, and retrofitting refrigerant AC types of split ducts and cassettes that still use R-22 with MC-22 which can save electricity 15-25%.
EFFECT OF BLEACHING EARTH ADDITION IN THE PRETREATMENT OF USED COOKING OIL ON BIODIESEL QUALITY Devy Arysandi; Ilham Dwi Arirohman; Muhammad Rizky Zen; Aji Suhartoyo
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 1 (2026): SJME Kinematika June 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i1.826

Abstract

Used cooking oil represents a promising alternative feedstock for biodiesel production due to its environmental benefits and economic feasibility. However, its direct utilization is limited by the high free fatty acid (FFA) content, which can interfere with the transesterification process. Therefore, a pretreatment process is required. This research investigates the effect of adding bleaching earth to the pretreatment process of used cooking oil (UCO) on the quality of the biodiesel produced. The research was conducted using a laboratory-scale experimental method with variations in the bleaching earth percentage from 0.5% to 2.0% (w/w). The findings indicate that bleaching earth significantly improves the quality of UCO as a biodiesel feedstock. Nevertheless, excessive addition of bleaching earth may lead to degradation effects and reduced stability of the biodiesel. Optimal performance, corresponding to compliance with SNI 7182:2015, was achieved with the addition of 1.0% bleaching earth. The resulting biodiesel had an acid number of 0.224 mg KOH/g, a density of 851.12 kg/m³, a viscosity of 4.44 cSt, a yield of 72.84% and a calorific value of 46.92 MJ/kg. Additionally, the physical quality, that is color of the biodiesel produced, is bright yellow.
Evaluation of Pyrolysis Temperature and Time on The Quality Improvement of Calliandra Wood Charcoal Briquettes as An Alternative Energy Source Murda, Rio Ardiansyah; Pasaribu, Try Vista Ulina Br; Wahyuningrum, Maeda; Zen, Muhammad Rizky; Maulana, Sena; Rinaldi, Nino; Maulana, Muhammad Iqbal; Munawaroh, Khoryfatul; Lizardi, Fathi; Faedloni, Akbar Ash Shiddiqi
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.14411

Abstract

ABSTRACT. Calliandra (Calliandra calothyrsus) wood is a promising biomass feedstock due to its abundance and high calorific value. This study investigated the effects of pyrolysis temperature (400 °C and 500 °C) and residence time (30 and 60 minutes) on the quality of calliandra charcoal briquettes. Biomass was carbonised, mixed with 15% cassava starch binder, pressed, and oven dried. The briquettes were evaluated for yield, density, moisture, ash, volatile matter, fixed carbon, calorific value, combustion rate, and structural changes. Results showed that all parameters except yield were significantly influenced by temperature and time. FTIR analysis revealed increased aromatisation at higher pyrolysis conditions, while XRD indicated reduced cellulose crystallinity and the emergence of calcite and silica phases. The briquettes exhibited densities of 0.62–0.63 g/cm³, moisture contents of 2.14–2.73%, ash 3.55–4.91%, volatile matter 16.32–25.11%, fixed carbon 68.60–76.63%, calorific values 7,856–7,978 cal/g, and combustion rates 0.08–0.09 g/min. The condition of 400 °C for 30 minutes offered the most balanced performance, while 500 °C for 60 minutes yielded the highest carbonisation and energy content. These findings highlight that moderate pyrolysis conditions can produce efficient, high-quality briquettes with low energy input. Keywords: Biomass, calliandra wood, energy, pyrolysis, wood charcoal briquettes
Penguatan Pengetahuan Energi Terbarukan Dan Peran Teknik Sistem Energi: Kegiatan Pengabdian Di SMA Negeri 12 Bandar Lampung Ilham Dwi Arirohman; Khoirun Naimah; Muhammad Rizky Zen; Rihardian Maulana Wicaksono
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 : Juli (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The low public awareness and understanding of renewable energy, particularly among younger generations, remains a challenge for accelerating the energy transition in Indonesia. This community service activity aimed to enhance the knowledge and awareness of students at SMA Negeri 12 Bandar Lampung regarding renewable energy, while introducing the Energy Systems Engineering Program at ITERA as part of the transition solution. The method included planning, interactive dissemination, and evaluation through pre- and post-tests. A total of 135 students participated in the activity, which utilized visual presentations and interactive quizzes (Quizziz). Evaluation results showed a significant increase in student understanding, with more than 93% showing improved post-test scores. These findings indicate that visual and interactive educational approaches are effective in improving energy literacy at the secondary education level. This activity also serves as a practical means of disseminating scientific knowledge from the Energy Systems Engineering field to the broader community.
Co-Authors Achmad Gus Fahmi Agung Dwi Saputra Agus Adi Putra Aji Suhartoyo Apriansyah Julio Arirohman, Ilham Dwi Cahaya Prautama Chairunnisa Noviarini Chairunnisa Noviarini Devy Arysandi Faedloni, Akbar Ash Shiddiqi Fahmi Sapta Hadi Fano Alfian Ardyansyah FX Nugroho Soelami Gaol, Javeni Eysama L. Hotdimas Simanjuntak Khoirun Naimah Khoryfatul Munawaroh Kiki Yuli Handayani Leily Nurul Komariah Lizardi, Fathi Maulana, Muhammad Iqbal Maulana, Sena Michelle Maria Magdalena Napitupulu Michelle Maria Magdalena Napitupulu Muhammad Khanafi Muhammad Miftahur Rahman Muhammad Ridho Hilman Naimah, Khoirun Nino Rinaldi Pasaribu, Try Vista Ulina Br Purba, Leonardo D. Rahmatullah, Abri Rihardian Maulana Wicaksono Siti Muslimah Susila Arita Uswatun Mujahidah Wahyuningrum, Maeda Wicaksono, Rihardian Maulana