Environmental and techno-economic analysis of the integration of biogas and solar power systems into urban wastewater treatment plants.

Autor: Odabaş Baş, Gözde1 (AUTHOR) gozde.odabas@hacettepe.edu.tr, Aydınalp Köksal, Merih1,2 (AUTHOR) aydinalp@hacettepe.edu.tr
Předmět:
Zdroj: Renewable Energy: An International Journal. Aug2022, Vol. 196, p579-597. 19p.
Abstrakt: This study analyses the environmental and economic benefits of integrating renewable energy sources (RES), biogas and solar energy into urban wastewater treatment plants (WWTPs). The energy intensity (kWh/m3) of the selected 456 WWTPs in Turkey was evaluated according to type and treatment process. The energy intensity of primary WWTPs (0.066–0.335 kWh/m3) is lower than that of secondary (0.075–1.361 kWh/m3) and advanced WWTPs (0.147–0.988 kWh/m3). RES integration is investigated using energy system optimization software for a sample of 25 WWTPs. Six scenarios were developed based on different CO 2 emission penalties (0 and 16 USD/ton) and prices for selling electricity to the grid (0.000, 0.050, and 0.133 USD/kWh) to demonstrate the impact of market-based instruments. RES integration is cost-effective for secondary and advanced WWTPs with a flow capacity above 1 million m3/y. Market-based instruments are found to significantly influence the decision to integrate, generate and use renewable electricity at WWTPs. The RES integration can meet up to 88% of the annual energy demand of the WWTPs at an electricity selling price of 0.133 USD/kWh. When no market-based instruments are implemented, RES generation can reach up to 23% of the WWTPs' annual energy demand while reducing CO 2 emissions by 15%. [Display omitted] • Operational data of over 450 wastewater treatment plants are collected. • The range of energy intensities is determined between 0.066 and 1.361 kWh/m3. • Renewable energy integration is cost-effective for plants sized more than 1 M m3/y. • Renewable energy integrations meet 88% of energy demand and reduce 62% of emissions. • Sell-back to the grid reduces the payback period of renewable energy integration. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
Externí odkaz: