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All Journal Jurnal Ilmu Lingkungan Jurnal Nasional Pengelolaan Energi MigasZoom Dedikasi: Jurnal Pengabdian kepada Masyarakat Makara Journal of Science
Ramadana, Ifan
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Humanities Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Mechanical Engineering Social Sciences Other

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Pemberdayaan Sumber Daya Lokal Dengan Pemanfaatan Limbah Kulit Kopi Robusta (Coffea canephora) Sebagai Biobriket di Desa Tanah Wulan Kabupaten Bondowoso Purimahua, Amanda Augre Maharani; Hidayat, Debby Aurellia; Dihayat, Icha Shofia; Herdianto, Dimas Nur; Asshofy , Muhammad Agil; Khotimah, Husnul; Lumbantoruan, Sri Lestari; Firmansyah, Muhammad Sahrul; Pravitasiwi, Nanda Tricya Julia; Ramadana, Ifan; Uzinuzulla, Yunita Virda; Palupi, Bekti; Fachri, Boy Arief; Rahmawati, Istiqomah
Dedikasi:Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 2 (2024): Jurnal Dedikasi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/dedikasi.v4i2.292

Abstract

Chemical Engineering Mengabdi 2023 is a manifestation of community service contained in one of the tridharma of higher education. Chemical Engineering Mengabdi 2023 activities are a means of transferring knowledge and technology from academics to the community. In the implementation of this activity, Chemical Engineering students of Jember University are expected to help the community overcome the problem of robusta coffee skin waste, and can empower the economy of Tanah Wulan Village residents by providing knowledge about the utilization of local resources and the utilization of coffee skin waste into briquette products with high economic value. The implementation of the service is divided into two, namely socialization and practice of making biobriquettes. Socialization activities were carried out to convey material on processing coffee skin waste into briquettes. Furthermore, the practice of making biobriquettes is carried out using the pyrolysis method. In this service activity, an environmentally friendly biobriquette product was obtained, which has consistent heat efficiency, and an economical price.
Modifikasi Fe3O4 dari Pasir Besi Pantai dengan Asam Oleat dan PEG melalui Metode co-Precipitation untuk Menangani Limbah Mikroplastik PET di Air Laut Mumtazah, Zuhriah; Bima Suci, Syeikh Maulana; Hakiki, Rizki Maulana; Muharja, Maktum; Palupi, Bekti; Rahmawati, Istiqomah; Yolanda Putri, Ditta Kharisma; Ramadana, Ifan
Jurnal Ilmu Lingkungan Vol 23, No 2 (2025): March 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.2.418-426

Abstract

Mikroplastik diartikan sebagai plastik yang berukuran kurang dari 5 mm. Mikroplastik telah terdeteksi secara luas di lingkungan perairan dan menjadi kontaminan yang sangat mengkhawatirkan. Oleh karena itu sangat diperlukan cara untuk menghilangkan mikroplastik dari air secara efektif. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh penambahan surfaktan asam oleat (OA) dan polietilen glikol (PEG) pada nanopartikel magnetit untuk pemisahan mikroplastik polyethylene terephthalate (PET) di media air. Penambahan surfaktan memungkinkan nanopartikel dapat terdispersi dengan baik dan lebih stabil. Nanopartikel magnetit disintesis dari pasir besi pantai Watu Ulo Jember dengan metode co-precipitation. Nanopartikel magnetit dikarakterisasi menggunakan PSA untuk mengetahui distribusi ukuran partikel dan FTIR untuk menentukan gugus fungsi pada n-Fe3O4 yang telah dimodifikasi dengan OA dan PEG. Ukuran partikel yang didapatkan berkisar antara 458,7–955,4 nm dengan intensitas tertinggi 712,4 nm. Efisiensi adsorpsi mikroplastik yang diperoleh menggunakan n-Fe3O4 adalah 77,8%, n-Fe3O4/PEG 91,7%, dan n- Fe3O4/OA 95,2%.
Evaluasi Kinerja Heat Exchanger 1 (HE-1) dan Heat Exchanger 2 (HE-2) Pada Unit Kilang PPSDM MIGAS Cepu Linda Septiana; Andini, Angger; Siva Ananda, Alvin; Ramadana, Ifan
Jurnal Nasional Pengelolaan Energi MigasZoom Vol. 7 No. 1 (2025): Jurnal Nasional Pengelolaan Energi MigasZoom
Publisher : Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37525/mz/2025-1/644

Abstract

Heat exchanger merupakan salah satu alat utama yang digunakan dalam proses pengolahan crude oil distillatioin (CDU) di kilang PPSDM MIGAS. Heat exchanger berfungsi sebagai pemanasan awal (preheater) crude oil sebelum dipanaskan lebih lanjut pada furnace. Kinerja HE seiring waktu dapat menurun akibat fouling dan kondisi yang berubah, sehingga diperlukan adanya evaluasi kinerja secara berkala. Penelitian ini bertujuan untuk mengevaluasi kinerja Heat Exchanger 1 dan Heat Exchanger 2 yang didasarkan pada fouling factor dan pressure drop. Metodologi penelitian yang digunakan yaitu pengamatan dan pengambilan data selama 5 hari terhadap kondisi operasi HE-01 dan HE-02 yang meliputi laju alir, densitas fluida, suhu inlet dan outlet. Efisiensi pada HE-1 adalah 65,64% dan pada HE-2 adalah 66,18%. Efisiensi kinerja heat exchanger relatif rendah karena usianya yang tua, telah dioperasikan dalam waktu lama, dan belum dilakukan pemeliharaan selama sekitar 3 tahun. Untuk menjaga dan meningkatkan kinerja HE-01 dan HE-02, perlu dilakukan pemeliharaan sesuai prosedur kerja serta evaluasi berkala untuk memantau kondisi heat exchanger.
A Comparison of Unconventional Microwave and Ultrasound-Assisted Extraction Methods used for Flavonoids Rahmawati, Istiqomah; Azizi, Daffa Hafiziaulhaq; Wibowo, Jihan Nafila; Reza, Muhammad; Fachri, Boy Arief; Palupi, Bekti; Rizkiana, Meta Fitri; Amini, Helda Wika; Ramadana, Ifan; Setiawan, Felix Arie
Makara Journal of Science Vol. 29, No. 1
Publisher : UI Scholars Hub

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

Abstract

Cocoa pods (Theobroma cacao L.) are a rich source of flavonoids, which are natural antioxidants known for their health benefits. This study investigated the use of microwave-assisted extraction (MAE) and ultrasound-assisted ex-traction (UAE) to extract the maximum flavonoids and antioxidants from cocoa pods. MAE and UAE are efficient and sustainable methods for extracting bioactive compounds like flavonoids and antioxidants from cocoa pods, offer-ing faster extraction, reduced solvent use, and better compound preservation compared to conventional methods. These technologies unlock the untapped potential of cocoa pods for applications in food, cosmetics, and pharmaceuti-cals. The effects of extraction time (2–10 min), microwave power (100–300 W), and the ratio of cocoa husk powder to solvent (0.02–0.06 g/mL) were evaluated for MAE. Meanwhile, for UAE, different temperatures (30–50 °C), times (10–30 min), and powers (16–48 W) were studied. The Design-Expert® software with Response Surface Methodology (RSM) and a Box-Behnken Design was utilized to analyze the effects of a combination of these parameters. The re-sults showed that extraction time, microwave power, and the ratio of cocoa husk powder–solvent significantly affected the total flavonoid yield and antioxidant capacity. The highest total flavonoid yield obtained by the MAE method (123.07 ppm) was at an extraction time of 10 min, cocoa husk–solvent ratio of 0.06 mg/mL, and microwave power of 300 W. The extract obtained by the MAE method showed an excellent antioxidant capacity of 43.49 mg/mL GAEAC, and a robust antioxidant activity indicated by an IC50 value of 42.19. Conversely, the highest total flavonoid yield of the UAE method (8.45 mg/mL GAEAC) was achieved at 30 min, 40 °C, and 40 W. The extract from the UAE method demonstrated a better antioxidant capacity (7.51 mg/mL GAEAC) and antioxidant activity (IC50 value of 23.46) than that from the MAE technique
Co-Authors Andini, Angger Asshofy , Muhammad Agil Azizi, Daffa Hafiziaulhaq Bekti Palupi Bima Suci, Syeikh Maulana Boy Arief Fachri Dihayat, Icha Shofia Felix Arie Setiawan Firmansyah, Muhammad Sahrul Hakiki, Rizki Maulana Helda Wika Amini Heni Pujiastuti Herdianto, Dimas Nur Hidayat, Debby Aurellia Istiqomah Rahmawati LINDA SEPTIANA Lumbantoruan, Sri Lestari Meta Fitri Rizkiana Muhammad Reza Muharja, Maktum Pravitasiwi, Nanda Tricya Julia Purimahua, Amanda Augre Maharani Siva Ananda, Alvin Uzinuzulla, Yunita Virda Wibowo, Jihan Nafila Yolanda Putri, Ditta Kharisma Zuhriah Mumtazah