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All Journal Journal of Community Based Environmental Engineering and Management Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi
Yohanis Wanane
Universitas Cenderawasih
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Public Health Other

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Analysis of Natural Convection Heat Transfer in Barapen Cooking in Papua Numberi, Johni Jonathan; Palamba, Pither; Giai, Agustinus; Rumar, Kristofel; Joni; Ansanay, Yane; Ranteallo, Obet T.; Siregar, Samuel P.; Kaiwai, Ruben M.; Rantepulung, Selyus; Werdani, Anastasia Sri; Griapon, Nourish; Wanane, Yohanis; Manalu, Janviter; Safanpo, Apolo; Karapa, Enos; Hartiningsih, Endang; Liga, Marthen; Wambrauw, Oscar O.; Silo, Akbar
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6562

Abstract

Barapen, a cooking tradition in various indigenous Papuan communities. To date, various social science studies have been conducted to examine social values, business economics, and political economy. While research in the aspects of applied science has yet to be conducted to study the phenomenon of heat transfer by natural convection from hot stones to food in cooking packs, this research was conducted. The purpose of this research is to study the phenomenon of heat transfer by natural convection from hot stones to food in cooking packs. In this study, a square-shaped artificial pool (260 cm x 210 cm x 50 cm) with white batah stone walls was used to cook food in a barapen. On the four walls, a type K thermocouple is inserted to measure the temperature at 3 layers, which will be the object of research. The ingredients are vegetables, sweet potatoes, and chicken meat that has been cut and stoned. As a discussion, the temperature gradient between layers occurs due to the difference in the amount of volumetric heat against time in each layer. The difference in the amount of heat in each layer is due to the difference in the density of the hot vapor trapped in each layer. Thus, it can be said that the cooking of food in Barapen occurs due to natural heat convection.
Integrated Environmental Management for Nickel Mining Communities in Papua Ramandei, Lazarus; Wanane, Yohanis Yulius
Journal of Community Based Environmental Engineering and Management Vol. 9 No. 2 (2025): September 2025
Publisher : Department of Environmental Engineering - Universitas Pasundan - Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jcbeem.v9i2.32341

Abstract

Nickel mining in Papua has experienced rapid expansion to meet global electric vehicle demand, yet poses significant environmental impacts on local communities. This research aims to develop and evaluate an integrated environmental management model that combines electrocoagulation technology, indigenous knowledge systems, and ecosystem restoration strategies to address wastewater pollution and environmental degradation from nickel mining activities. A mixed-method approach was employed with wastewater quality analysis, ecosystem damage mapping, and indigenous community participation evaluation at three nickel mining sites in Raja Ampat, Southwest Papua. The integrated environmental management approach developed in this study consists of four main components: (1) electrocoagulation wastewater treatment system, (2) community-based environmental management using traditional sasi system, (3) phytoremediation using endemic Papuan plants, and (4) participatory monitoring and evaluation framework. Laboratory-scale electrocoagulation testing showed optimal heavy metal removal efficiency at 1.5 A current intensity, 90-minute contact time, and pH 7.5, achieving 95.2% nickel, 93.8% chromium, and 97.5% iron removal from mining wastewater. Implementation of community-based waste management systems using local wisdom sasi approach reduced environmental degradation by 68% and improved community welfare by 45%. The integrated ecosystem restoration model using endemic Papuan ferns demonstrated 78% effectiveness in soil and water quality recovery within 24 months. The research concludes that integrated environmental management approaches combining sustainable technology, community participation, and indigenous knowledge conservation can provide effective solutions to mitigate negative nickel mining impacts while supporting just clean energy transition.
Co-Authors Abda Abda Agustinus Giai AKBAR SILO Endang Hartiningsih Griapon, Nourish Johni J Numberi Karapa, Enos Lazarus B. Ramandey, Lazarus B. Manalu, Janviter Marthen Liga Mickael Ruben Kaiway Pither Palamba Ranteallo, Obet Rumar, Kristofel Safanpo, Apolo Samuel Parlindungan Siregar Selyus Rantepulung Wambrauw, Oscar O. Werdani, Anastasia Sri Yane Oktovina Ansanay