Harnessing Solar Energy for Wastewater
This article provides an overview of harnessing solar energy for wastewater treatment plants, highlighting its relevance and importance
Foley (2010) analysed the economic feasibility of solar in a wastewater treatment plant in Singapore to meet the plant's energy requirement. He concluded that solar energy was economically viable only with a rebate of at least 63%.
The wastewater treatment plant treating 165 MGD with a 4.2 MW solar system installed was the biggest plant with a solar PV installation. However, this plant presented unique conditions, which made it non-representative of global practices.
Integrating renewable energy sources, biogas, and solar energy could provide up to 88% of the annual energy requirements of WWTPs. Recommendations are provided for further research considering the limited availability of integrated resources for studying the simultaneous utilization of photovoltaic and biogas systems. 1. Introduction
In wastewater treatment plants with a flow rate below 5 MGD, the absence of energy generation from biogas could have led the adoption of solar PV. In these plants, solar PV often represented the only source of renewable energy, producing between 30% and 100% of the energy demand of these plants.
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