TAILIEUCHUNG - Use of geothermal fluid for agricultural irrigation: preliminary studies in BalçovaNarlıdere Geothermal Field (Turkey)

Balçova-Narlıdere Geothermal Field (BNGF) hosts the largest geothermal district heating system of Turkey and several geothermal wells used for district heating and thermal tourism activities. This study assesses the use of BNGF geothermal fluid for agricultural activities. The spent geothermal brine was treated using nanofiltration and reverse osmosis membranes on a pilot-scale membrane test system. The qualities of the product were evaluated in terms of agricultural irrigation integrated with the implemented innovative wireless sensor network. | Turkish Journal of Earth Sciences Turkish J Earth Sci 2021 30 1186-1199 http earth TÜBİTAK Research Article doi yer-2106-10 Use of geothermal fluid for agricultural irrigation preliminary studies in Balçova- Narlıdere Geothermal Field Turkey 1 2 2 3 Mehmet Kamil MERİÇ Yasemin Senem KUKUL Emrah ÖZÇAKAL Neriman Tuba BARLAS 3 4 4 5 Hakan ÇAKICI Yakubu Abdullahi JARMA Nalan KABAY Alper BABA 1 Bergama Vocational Training School Ege University İzmir Turkey 2 Department of Farm Structures and Irrigation Faculty of Agriculture Ege University İzmir Turkey 3 Department of Soil Science and Plant Nutrition Faculty of Agriculture Ege University İzmir Turkey 4 Department of Chemical Engineering Engineering Faculty Ege University İzmir Turkey 5 Department of International Water Resources Engineering Faculty İzmir Institute of Technology İzmir Turkey Received Accepted Published Online Final Version Abstract Balçova-Narlıdere Geothermal Field BNGF hosts the largest geothermal district heating system of Turkey and several geothermal wells used for district heating and thermal tourism activities. This study assesses the use of BNGF geothermal fluid for agricultural activities. The spent geothermal brine was treated using nanofiltration and reverse osmosis membranes on a pilot-scale membrane test system. The qualities of the product were evaluated in terms of agricultural irrigation integrated with the implemented innovative wireless sensor network. It is important to use geothermal fluid which is consists of valuable minerals for irrigation. But when using geothermal fluid in irrigation the chemical composition of the water must be carefully monitored to prevent damage to the plants. Nevertheless the first result shows that the use of geothermal fluid to irrigate is proving to be a promising and economically viable option in BNGF. Key words Arsenic boron drip irrigation geothermal water membrane process wireless sensor

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