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The purpose of this research is to determine the feasibility of supplying photovoltaic solar energy for the electrical requirements of drinking water and wastewater treatment plants, in six
Cooperate with solar panels to form an energy-saving and green photovoltaic storage system, making it easier to build an independent energy storage system for residential and commercial
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Summary of various solar power utilization scenarios of PV + WWTP projects. Leveraging electricity for hydrogen production via photovoltaic–electrochemical water splitting is another potential utilization scenario [59, 60]. The effluent of WWTPs provides a vast volume of water and oxygen can be simultaneously produced.
Among them, the PV+ system in Wangxiaoying WWTP, starting operation in 2018, has an installed power capacity of 10.8 MWp , making it the largest PV+ project at that time.
Since 2019, hundreds of PV + WWTP projects have been built and are currently in operation nationwide, with the majority located in the Yangtze River Economic Belt. According to 31 case projects, the adoption of PV systems can, on average, supply about 20 % of the electricity required annually.
A coefficient of 0.184 is obtained and it means that the space for handling 1 m3 /d of wastewater can lead to 18.4 kWh/a of electricity generation under the current deployment paradigm in China. Generally, 0.33 kWh/d is required to treat 1 m 3 volume of wastewater at WWTPs in China , thereby leading to about 120 kWh annually.
