Brenda, Marian (2015)
Hybrid sludge modeling in water treatment processes.
Technische Universität Darmstadt
Dissertation, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Sludge occurs in many waste water and drinking water treatment processes. The numeric modeling of sludge is therefore crucial for developing and optimizing water treatment processes. Numeric single-phase sludge models mainly include settling and viscoplastic behavior. Even though many investigators emphasize the importance of modeling the rheology of sludge for good simulation results, it is difficult to measure, because of settling and the viscoplastic behavior. In this thesis, a new method is developed that combines rheological measurements with a process-viscometer and numeric simulations, in order to produce flow curves that most probably display the real viscoplastic behavior of sludge below a concentration of 10 g/l. The settling velocity is determined with a hybrid approach combining standard measurements and numeric simulations of the measurements. This is called the hybrid sludge model, which finally demonstrates its power by simulating a complex lamella clarifier. The results of the simulation fit the measurements and observations of the testing plant well. This demonstrates that the hybrid sludge model contributes to the development of a numerical model that requires a minimum of measurements and computational effort, in order to simulate water treatment plants. Finally, sludge properties (settling and viscoplastic behavior) from different waste water treatment plants and drinking water treatment plants are compared, with remarkable results. This thesis provides efficient tools for including numeric modeling in the design and optimization processes of water treatment plants.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2015 | ||||
Autor(en): | Brenda, Marian | ||||
Art des Eintrags: | Bibliographie | ||||
Titel: | Hybrid sludge modeling in water treatment processes | ||||
Sprache: | Englisch | ||||
Referenten: | Urban, Prof.Dr. Wilhelm | ||||
Publikationsjahr: | Juni 2015 | ||||
Ort: | Darmstadt | ||||
Verlag: | Institut IWAR | ||||
Reihe: | Schriftenreihe IWAR | ||||
Band einer Reihe: | 231 | ||||
Zugehörige Links: | |||||
Kurzbeschreibung (Abstract): | Sludge occurs in many waste water and drinking water treatment processes. The numeric modeling of sludge is therefore crucial for developing and optimizing water treatment processes. Numeric single-phase sludge models mainly include settling and viscoplastic behavior. Even though many investigators emphasize the importance of modeling the rheology of sludge for good simulation results, it is difficult to measure, because of settling and the viscoplastic behavior. In this thesis, a new method is developed that combines rheological measurements with a process-viscometer and numeric simulations, in order to produce flow curves that most probably display the real viscoplastic behavior of sludge below a concentration of 10 g/l. The settling velocity is determined with a hybrid approach combining standard measurements and numeric simulations of the measurements. This is called the hybrid sludge model, which finally demonstrates its power by simulating a complex lamella clarifier. The results of the simulation fit the measurements and observations of the testing plant well. This demonstrates that the hybrid sludge model contributes to the development of a numerical model that requires a minimum of measurements and computational effort, in order to simulate water treatment plants. Finally, sludge properties (settling and viscoplastic behavior) from different waste water treatment plants and drinking water treatment plants are compared, with remarkable results. This thesis provides efficient tools for including numeric modeling in the design and optimization processes of water treatment plants. |
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Alternatives oder übersetztes Abstract: |
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Freie Schlagworte: | sludge, water treatment, Computational Fluid Dynamics (CFD), viscosity of sludge, rheology, shear thinning, settling, compression | ||||
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Zusätzliche Informationen: | Zugl.: Darmstadt, Technische Universität, Diss. 2015 |
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Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut IWAR - Wasser- und Abfalltechnik, Umwelt- und Raumplanung > Fachgebiet Wasserversorgung und Grundwasserschutz |
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Hinterlegungsdatum: | 09 Okt 2015 14:51 | ||||
Letzte Änderung: | 02 Jul 2024 14:52 | ||||
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Referenten: | Urban, Prof.Dr. Wilhelm | ||||
Schlagworte: |
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Verfügbare Versionen dieses Eintrags
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Hybrid Sludge Modeling in Water Treatment Processes. (deposited 19 Jun 2024 14:56)
- Hybrid sludge modeling in water treatment processes. (deposited 09 Okt 2015 14:51) [Gegenwärtig angezeigt]
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