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All Journal Prospect: Jurnal Pemberdayaan Masyarakat
Yayan Jatmika
Kelompok Tani Arjuna Jaya Sena Farm
Humanities Environmental Science Social Sciences

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Transforming Geothermal Brine and Organic Waste into Value: The COMBINE Circular Economy Model at PGE Karaha Area Abdan Husen Al Habsi; Maria Angeli Adind Ayu Arawinda Swasti Alam; Muhammad Sabdian Harwanda; Laurentius Hani Dwi Atmojo; Yayan Jatmika; Yaya Rohana; Ayun
Prospect: Jurnal Pemberdayaan Masyarakat Vol. 5 No. 3 (2026)
Publisher : Prospect Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55381/jpm.v5i3.639

Abstract

Geothermal operations generate brine as a secondary product, while agrarian communities around the PGE Karaha Area face limited fertilizer access, rising input costs, declining soil quality, and weak farmer regeneration. This study analyzes COMBINE (Compost Brine) as a circular-economy community empowerment model that converts geothermal brine, wild grass, coffee husks, and sheep manure into mineral-enriched organic fertilizer. A descriptive case-study approach was applied using social-mapping documents, field observations, focus group discussions, interviews, community satisfaction surveys, laboratory testing, demonstration plots, monitoring records, and environmental impact studies. The analysis follows an input–process–output–outcome–impact framework. The findings show that COMBINE integrates material valorization with co-production among the company, university, farmer groups, village governments, and young farmers. The program produced a patented fertilizer, standardized procedures, community-based production, improved crop performance, lower fertilizer expenditure, high community acceptance, youth participation, and measurable environmental benefits. Its novelty lies in linking direct-use geothermal innovation with knowledge transfer and local institutional strengthening. Long-term replication requires location-specific quality testing, soil-based application, business recording, and adaptive multi-stakeholder governance
Co-Authors Abdan Husen Al Habsi Ayun Laurentius Hani Dwi Atmojo Maria Angeli Adind Ayu Arawinda Swasti Alam Muhammad Sabdian Harwanda Yaya Rohana