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All Journal HAYATI Journal of Biosciences Agrikultura Jurnal Ilmu Dasar AL KAUNIYAH Planta Tropika Biosaintifika: Journal of Biology & Biology Education Jurnal Pengabdian Magister Pendidikan IPA Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun International Journal on Food, Agriculture and Natural Resources (IJFANRES) Fruitset Sains : Jurnal Pertanian Agroteknologi Inovasi Fisika Indonesia (IFI) Golden Ratio of Mapping Idea and Literature Format Journal of Applied Agricultural Science and Technology Karimah Tauhid Jurnal Cakrawala Akademika
Ratnasari, Tri
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ANALYSIS OF THE EFFECTIVENESS OF METAL COVER IN PREVENTING RADIATION LEAKAGE IN MICROWAVE-BASED GASIFICATION REACTOR Rahayu, Vira; Ratnasari, Tri; Rahmatullah, Muhammad Arif; Pramono, Yono Hadi; Yudoyono, Gatut
Inovasi Fisika Indonesia Vol. 14 No. 3 (2025): Vol 14 No 3
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n3.p404-411

Abstract

Abstract Microwave-assisted gasification, which converts biomass and plastic waste into syngas, has significant promise for the production of clean renewable energy. This technology has the potential to reduce reliance on fossil fuels and address waste management challenges. Operational safety, particularly with microwave leakage, is a significant issue due to stringent standards for microwave exposure. This study evaluates the effectiveness of several metallic materials as microwave shields in microwave gasification reactors. This study investigates the effectiveness of 2 mm thick metal sheets made of copper, aluminum, iron, and stainless steel in reducing microwave leakage at a frequency of 2.45 GHz. Experimental results indicated that copper and aluminum are particularly effective shields. Copper attained a remarkable leakage reduction of 99.53% (from 105.6 W/m2  to 0.5  W/m2) while aluminum reached a decrease of 97.35% (from 105.6 W/m2 to 2.8 W/m2). Efficient reflection and absorption of microwave energy are facilitated by the extremely low skin depth values of both materials, which is consistent with their high effectiveness. However, iron and stainless steel also demonstrated a strong capacity to reduce leakage, with an efficacy of 89.96% (reducing leakage to 10.6 W/m2 ) and 73.86% (reducing leakage to 27.6 W/m2). Still, their performance was influenced by more complex magnetic properties. These results indicate that copper and aluminum are ideal choices for primary microwave shielding applications in gasification reactors. Conversely, iron and stainless steel, while less efficient as primary shields, offer excellent mechanical strength and corrosion resistance, making them suitable for auxiliary structural components. Therefore, a hybrid design integrating a thin shielding layer of copper or aluminum onto these structural elements is proposed for optimal microwave containment. This study provides crucial insights for the design of safer and more efficient microwave gasification reactors, thereby supporting the development of responsible renewable energy technologies.
PENGARUH POC AIR LIMBAH BUDIDAYA IKAN LELE DAN DOSIS NPK TERHADAP SERAPAN HARA N DAN PERTUMBUHAN TANAMAN CABAI RAWIT (Capsicum frustescens L.) Muthi, Ornela; Hermiyanto, Bambang; Ratnasari, Tri; Wijayanto, Yagus
Fruitset Sains : Jurnal Pertanian Agroteknologi Vol. 13 No. 5 (2025): December: Ilmu Pertanian dan Bidang Terkait
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/fruitset.v13i5.6822

Abstract

The excessive use of inorganic fertilizers in the cultivation of bird’s eye chili (Capsicum frutescens L.) can lead to land degradation and reduced soil fertility, resulting in suboptimal plant growth and yield. One promising solution to address this issue is the utilization of catfish aquaculture wastewater as a raw material for liquid organic fertilizer (LOF). The nutrient content in catfish wastewater, such as nitrogen (N), phosphorus (P), and potassium (K), supports plant development. This study aimed to determine the effect of the combination of LOF from catfish wastewater and various NPK fertilizer doses on nitrogen uptake and the growth of bird’s eye chili plants. The research was conducted at the Greenhouse of the Agrotechnopark, University of Jember, from December 2024 to March 2025, using a factorial completely randomized design (CRD) with two factors: LOF type (no LOF, fresh LOF, and fermented LOF) and NPK dosage (10 g, 15 g, and 20 g per plant). Data were analyzed using ANOVA and further tested with DMRT at a 5% significance level. The results showed that the combination of fermented liquid organic fertilizer (POC) application and NPK dosage of 15 g per plant (or 300 kg/ha), which significantly affected the variables of plant height, number of leaves, number of branches, and root dry weight. It can be concluded that the utilization of catfish aquaculture wastewater as a liquid organic fertilizer, combined with a 25% reduction in NPK fertilizer dosage, can promote plant growth.
Co-Authors Agung Sih Kurnianto Ahmad Ilham Tanzil Aji, Seto Purnomo Amany, Alfiyyah Nur Ana, Daniar Alfi Arif Mohammad Siddiq Ariyono, Alief Rizky Arum, Ayu Puspita Asshidiqie, Wahyu Pratama Bambang Sugiharto Budi Kriswanto, Budi Cahyono, Haris Chatarina Umbul Wahyuni Dewi, Nilasari Dwi Setyati Dyah Ayu Savitri Euis Salbiah Fadhillah, Dewi Nur Faisal Tri Ramdani Fanata, Wahyu Indra Duwi Firdaus, Anggun Sausan Gatut Yudoyono Gustina, Reza Handayani, Etty Hari Purnomo Hari Setiyowati Hari Sulistyowati Hasanah, Ela Apriliyanti Hermiyanto, Bambang Ika Purnamasari Intan Kartika Setyawati Khowatini, Husnul Khozin, Mohammad Nur Luh Putu Suciati Magfiroh, Illia Seldon Meliala, Susan Barbara Patricia Sembiring Mochammad Wildan Jadmiko Mohammad Ali Mudhor Muhammad, Adibillah Muhtadi, Much. Misbah Muthi, Ornela Nafiah, Nur Lailin Neliana, Intan Ria Nikmah, Nasilatun Nilasari Dewi Nisa, Aminatun Noer Novijanto Novitasari , Adin Nur Widodo Nurcharisma, Adinda Parawita Dewanti Parawita Dewanti Patricia SM, Susan Barbara Prayoga, Mohammad Candra Puji Rahayu Raharja, Ajung Gilang Putra Rahayu, Vira Rahmatullah, Muhammad Arif Ramadhani, Rifki Fahrisal Refa Firgiyanto Restanto, Didik Pudji Ristiyana, Suci Setiyono Setiyono Siti Rohimah Soviana, EIida Sri Andriani Su’udi, Mukhamad Sulistiyowati, Hari Syafina Pusparani Tri Handoyo TRI HANDOYO Tri Wahyu Saputra Ummi Sholikhah Utami, Sri Rejeki Wahyu Nurkholis Hadi Syahputra Yagus Wijayanto Yono Hadi Pramono Yulianto, Roni Yusuf Rachmandika Zakiah, Ratu Ulfah