| Autor: |
Marjoleine Weemaes, A. Fenu, G. Dirckx, T. Wambecq, Stefan Kroll |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Journal of Hydrology. 571:437-447 |
| ISSN: |
0022-1694 |
| DOI: |
10.1016/j.jhydrol.2019.01.065 |
| Popis: |
Dilution of sewage caused by extraneous water is believed to have a negative effect on the daily operation of the wastewater infrastructure. Ecological consequences arise due to an increased activity of combined sewer overflows (CSO) and to a decreasing efficiency of treatment processes, while the elevated pumping activity induces a proportional increase in operational cost. This work aims at putting these drawbacks into perspective by an in-depth investigation of several catchments for which detailed sewer and treatment plant models were set up to verify the effect of a virtual removal of the existing sewage dilution. Results showed that extraneous water is responsible for 5–35% higher CSO volume. Effects at the treatment plant seem less significant with small gains in treatment efficiency (2–4%). Energy savings (up to 5%) only marginally exceed the rise in sludge production cost assuming this extraneous water would be eliminated. Finally, a pragmatic approach towards strategies of removing dilution is suggested by the use of a decision tree. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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