Potentials for Geothermal Energy Applications and Quality of Hot Water from EU-Niger Delta Support Programme Boreholes, Ovia-South-West LGA Edo State

Abstract

The temperature of hot water and other physico-chemical indicators

from EU-Niger Delta Support Programme-Component 3 (Water and

Sanitation) boreholes in Ovia-south-west L.G.A, Edo State were

analysed for potential geothermal energy development and

suitability for domestic purposes. Water sampling and in-situ

measurements were carried out in September 2021 at the EU-

borehole projects at Obaretin and Ofumwengbe communities in

Ovia South West, Edo State. The study found that temperature values

of water were 57.20C and 53.80C in Obaretin and Ofumwengbe

boreholes respectively. Iron, lead, chromium and cadmium contents

of water from the boreholes were slightly higher than acceptable

limits. The pH values of EU-borehole were also acidic. With mean

temperature values of 55.5 0C at the discharge points, it was

concluded that the hot water EU-project is not suitable for electricity

generation which requires a temperature of 200°C and, or medium

application (150-200°C). Similarly, the hot water from the EU-

borehole is best classified as sedimentary geothermal systems. In

view of the water temperature, it is recommended that the hot water

may be used for other direct applications such as resort or

recreational centre and agro-businesses as these economic activities

will contribute to economic development of the agrarian community.

Findings from the study have implications for sustainable policy

creation as well as may influence investor’s decisions towards

development of geothermal energy applications