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Eco-energetic feasibility study of using grid-connected photovoltaic system in wastewater treatment plant

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  • Bey, M.
  • Hamidat, A.
  • Nacer, T.

Abstract

The industrial activities intensification has inevitably caused an excessive use of underground waters and fossils energies, and severe environmental pollution with dire consequences for water resources. This situation intensifies in populated arid regions. In this context, wastewater treatment is a reliable source of water and nutrients for agricultural production. This study aims at treating wastewater using photovoltaic energy, to reduce conventional electricity demand. This paper studies energy and economic feasibility of grid-connected photovoltaic systems (GCPVS) in wastewater treatment plants (WWTPs). The optimization is based on: energy balance, installation surface area and levelized cost of energy (LCOE). Results show GCPVS installed in the northwest of Algeria, can cover 53% of WWTP electrical load and inject 510 MWh/year into grid representing 65% of the load. The regional energy consumption can be reduced by 2% in daytime. LCOE is estimated around 09.14 centUS$/kWh, which is lower than conventional electricity cost 10.17 centUS$/kWh. The benefit-cost ratio is estimated around 0.69 Million US$ (33%). This plant provides 4800 m3/day of agricultural irrigation, where treatment energy cost is decreased from 3.4 centUS$/m3 to 2.3 centUS$/m3. The WWTP fertilize 300 ha of soil per year. This work highlights the efficiency of self-sufficient WWTPs in northern Africa region.

Suggested Citation

  • Bey, M. & Hamidat, A. & Nacer, T., 2021. "Eco-energetic feasibility study of using grid-connected photovoltaic system in wastewater treatment plant," Energy, Elsevier, vol. 216(C).
    • Handle: RePEc:eee:energy:v:216:y:2021:i:c:s0360544220323240
    DOI: 10.1016/j.energy.2020.119217
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    2. Chen, Xin & Zhou, Wenjia, 2022. "Economic and ecological assessment of photovoltaic systems for wastewater treatment plants in China," Renewable Energy, Elsevier, vol. 191(C), pages 852-867.
    3. Liu, Runxi & Huang, Runyao & Shen, Ziheng & Wang, Hongtao & Xu, Jin, 2021. "Optimizing the recovery pathway of a net-zero energy wastewater treatment model by balancing energy recovery and eco-efficiency," Applied Energy, Elsevier, vol. 298(C).
    4. Xu, Jiuping & Zhao, Chuandang & Wang, Fengjuan & Yang, Guocan, 2022. "Industrial decarbonisation oriented distributed renewable generation towards wastewater treatment sector: Case from the Yangtze River Delta region in China," Energy, Elsevier, vol. 256(C).
    5. Moazeni, Faegheh & Khazaei, Javad, 2021. "Co-optimization of wastewater treatment plants interconnected with smart grids," Applied Energy, Elsevier, vol. 298(C).
    6. Odabaş Baş, Gözde & Aydınalp Köksal, Merih, 2022. "Environmental and techno-economic analysis of the integration of biogas and solar power systems into urban wastewater treatment plants," Renewable Energy, Elsevier, vol. 196(C), pages 579-597.

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