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Heat recovery during treatment of highly concentrated wastewater: economic evaluation and influencing factors

Luis Corbala Robles (UGent) , Frederik Ronsse (UGent) , Jan Pieters (UGent) and Eveline Volcke (UGent)
(2018) Water Science and Technology. 78(11). p.2270-2278
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Abstract
This paper assesses the economics of heat recovery from biological wastewater treatment plants (WWTPs) treating concentrated wastewater – as higher concentrations result in higher heat generation in the treatment basin. A heat balance model has been applied to calculate the amount of recoverable heat from the system and the effect of the heat extraction capacity on the economics of a heat pump installation – evaluated using the internal rate of return. A sensitivity analysis has been performed to evaluate the effect of several parameters on the economics of heat recovery in this type of WWTP: the electricity price, the price of the fuel substituted by heating savings, the investment costs, the coefficient of performance (COP) and the amount of heat extracted from the system. It was calculated that the heat pump capacity has to be high enough to recover a significant amount of heat, but low enough to improve the economics of the system. The economic performance of the system is very dependent on energy prices of both electrical power to run the heat pump and the fuel (heat) cost substituted by the heat pump.
Keywords
energy efficiency, heat pump, resource recovery, wastewater treatment

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Chicago
Corbala Robles, Luis, Frederik Ronsse, Jan Pieters, and Eveline Volcke. 2018. “Heat Recovery During Treatment of Highly Concentrated Wastewater: Economic Evaluation and Influencing Factors.” Water Science and Technology 78 (11): 2270–2278.
APA
Corbala Robles, L., Ronsse, F., Pieters, J., & Volcke, E. (2018). Heat recovery during treatment of highly concentrated wastewater: economic evaluation and influencing factors. Water Science and Technology, 78(11), 2270–2278.
Vancouver
1.
Corbala Robles L, Ronsse F, Pieters J, Volcke E. Heat recovery during treatment of highly concentrated wastewater: economic evaluation and influencing factors. Water Science and Technology. IWA Publishing; 2018;78(11):2270–8.
MLA
Corbala Robles, Luis et al. “Heat Recovery During Treatment of Highly Concentrated Wastewater: Economic Evaluation and Influencing Factors.” Water Science and Technology 78.11 (2018): 2270–2278. Print.
@article{8610542,
  abstract     = {This paper assesses the economics of heat recovery from biological wastewater treatment plants (WWTPs) treating concentrated wastewater -- as higher concentrations result in higher heat generation in the treatment basin. A heat balance model has been applied to calculate the amount of recoverable heat from the system and the effect of the heat extraction capacity on the economics of a heat pump installation -- evaluated using the internal rate of return. A sensitivity analysis has been performed to evaluate the effect of several parameters on the economics of heat recovery in this type of WWTP: the electricity price, the price of the fuel substituted by heating savings, the investment costs, the coefficient of performance (COP) and the amount of heat extracted from the system. It was calculated that the heat pump capacity has to be high enough to recover a significant amount of heat, but low enough to improve the economics of the system. The economic performance of the system is very dependent on energy prices of both electrical power to run the heat pump and the fuel (heat) cost substituted by the heat pump.},
  author       = {Corbala Robles, Luis and Ronsse, Frederik and Pieters, Jan and Volcke, Eveline},
  issn         = {0273-1223},
  journal      = {Water Science and Technology},
  number       = {11},
  pages        = {2270--2278},
  publisher    = {IWA Publishing},
  title        = {Heat recovery during treatment of highly concentrated wastewater: economic evaluation and influencing factors},
  url          = {http://dx.doi.org/10.2166/wst.2018.507},
  volume       = {78},
  year         = {2018},
}

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