Geological and environmental implications of the utilisation of geothermal energy in the Lahendong working area, Indonesia

• Autorzy: Mukti Mentari , Tomaszewska Barbara , Starczewska Magdalena , Ningrum Eva, Oktavia

Identyfikatory

DOI

10.7494/geol.2022.48.1.69

• Języki publikacji: EN

Abstrakty

EN

This study presents the characteristics of the Lahendong geothermal working area (GWA) in terms of the geological, geophysical, geochemical, and environmental implications. The investigated area is located in the Sulawesi North Arm, where the volcanic arc extends from Sangihe Island to Minahasa with two major strike-slip faults. NE–SW (northeast-southwest) trending faults control the thermal surface manifestation. The geothermal field is grouped into two hydrochemical systems: acid-sulphate-chloride (acid reservoir) and chloride (closer to neutral) types. The environmental implication analysis shows that the North Sulawesi province is experiencing water shortages due to excessive mining activities, inadequate wastewater management, and periods of drought. Although geothermal wastewater is being re-injected, the possibility of water contamination by hazardous materials from geothermal power plant activity is still evident. This study reviews the actual geothermal utilisation in the form of the 120 MWe power plant, the 500 kWe binary power plant, while the heat from geothermal energy is used for palm sugar production. Furthermore, the article also analyses the potential of the rational use of geothermal resources in this area. As a result of the high salinity and silica concentration of the brine, the geothermal wastewater should be treated before further utilisation and it potentially benefits both local communities and geothermal companies.

Słowa kluczowe

EN

geothermal system; geothermal direct utilisation; geothermal desalination; environmental impact

• Wydawca: Wydawnictwa AGH
• Czasopismo: Geology, Geophysics and Environment
• Rocznik: 2022
• Tom: Vol. 48, no. 1
• Strony: 69--82
• Opis fizyczny: Bibliogr. 45 poz., rys.

Twórcy

autor

Mukti Mentari

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland

• https://orcid.org/0000-0003-3390-1027

autor

Tomaszewska Barbara

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland

• https://orcid.org/0000-0002-4780-1580

autor

Starczewska Magdalena

• AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland

• https://orcid.org/0000-0003-4712-9875

autor

Ningrum Eva, Oktavia

• Institut Teknologi Sepuluh Nopember, Faculty of Vocational Studies, Department of Industrial Chemical Engineering, Kampus ITS Sukolilo, Surabaya, Indonesia

• https://orcid.org/0000-0003-0581-3070

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