City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach
Saagi, R. LU
; Arnell, M.
LU
; Wärff, C.
LU
; Ahlström, M.
and Jeppsson, U.
LU
(2022)
In Science of the Total Environment
820.
- Abstract
Around 90% of the energy requirement for urban water systems management is for heating domestic tap water. In addition, the energy content of wastewater is mainly in the form of heat (85%). Hence, there is an obvious interest in recovering a large portion of this heat. However, city-wide scenario analyses that evaluate heat recovery at various locations while considering impacts on wastewater treatment plant (WWTP) performance are currently very limited. This study presents a comprehensive model-based city-wide evaluation considering four different heat recovery locations (appliance, household, precinct and WWTP effluent) for a Swedish city with varying degrees of implementation using an uncertainty-based approach. Results show that... (More)
Around 90% of the energy requirement for urban water systems management is for heating domestic tap water. In addition, the energy content of wastewater is mainly in the form of heat (85%). Hence, there is an obvious interest in recovering a large portion of this heat. However, city-wide scenario analyses that evaluate heat recovery at various locations while considering impacts on wastewater treatment plant (WWTP) performance are currently very limited. This study presents a comprehensive model-based city-wide evaluation considering four different heat recovery locations (appliance, household, precinct and WWTP effluent) for a Swedish city with varying degrees of implementation using an uncertainty-based approach. Results show that heat recovery at the appliance level, with heat exchangers installed at 77% of the showers at domestic households, leads to a mean energy recovery of 127 MWh/day with a 0.25 °C reduction in mean WWTP inlet temperature compared to the default case without heat recovery. The highest mean temperature reduction compared to the default case is 1.5 °C when heat is recovered at the precinct level for 77% of the domestic wastewater flow rate. Finally, the impact on WWTP nitrification capacity is negligible in this case due to its large existing capacity and design.
(Less)
- author
- Saagi, R.
LU
; Arnell, M.
LU
; Wärff, C.
LU
; Ahlström, M.
and Jeppsson, U.
LU
- organization
- publishing date
- 2022
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- City-wide modelling, Heat recovery, Uncertainty analysis, Wastewater
- in
- Science of the Total Environment
- volume
- 820
- article number
- 153273
- publisher
- Elsevier
- external identifiers
-
- pmid:35074388
- scopus:85123381630
- ISSN
- 0048-9697
- DOI
- 10.1016/j.scitotenv.2022.153273
- language
- English
- LU publication?
- yes
- id
- eb0ff579-1ef6-4b03-b9f6-2c93cdbe6f8a
- date added to LUP
- 2022-03-15 15:47:49
- date last changed
- 2024-06-08 05:55:53
@article{eb0ff579-1ef6-4b03-b9f6-2c93cdbe6f8a,
abstract = {{<p>Around 90% of the energy requirement for urban water systems management is for heating domestic tap water. In addition, the energy content of wastewater is mainly in the form of heat (85%). Hence, there is an obvious interest in recovering a large portion of this heat. However, city-wide scenario analyses that evaluate heat recovery at various locations while considering impacts on wastewater treatment plant (WWTP) performance are currently very limited. This study presents a comprehensive model-based city-wide evaluation considering four different heat recovery locations (appliance, household, precinct and WWTP effluent) for a Swedish city with varying degrees of implementation using an uncertainty-based approach. Results show that heat recovery at the appliance level, with heat exchangers installed at 77% of the showers at domestic households, leads to a mean energy recovery of 127 MWh/day with a 0.25 °C reduction in mean WWTP inlet temperature compared to the default case without heat recovery. The highest mean temperature reduction compared to the default case is 1.5 °C when heat is recovered at the precinct level for 77% of the domestic wastewater flow rate. Finally, the impact on WWTP nitrification capacity is negligible in this case due to its large existing capacity and design.</p>}},
author = {{Saagi, R. and Arnell, M. and Wärff, C. and Ahlström, M. and Jeppsson, U.}},
issn = {{0048-9697}},
keywords = {{City-wide modelling; Heat recovery; Uncertainty analysis; Wastewater}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Science of the Total Environment}},
title = {{City-wide model-based analysis of heat recovery from wastewater using an uncertainty-based approach}},
url = {{http://dx.doi.org/10.1016/j.scitotenv.2022.153273}},
doi = {{10.1016/j.scitotenv.2022.153273}},
volume = {{820}},
year = {{2022}},
}