Sökning: L773:0273 1223
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On the modelling of...
On the modelling of the dynamic propagation of biological components in the secondary clarifier
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- Jeppsson, Ulf (författare)
- Lund University,Lunds universitet,Industriell elektroteknik och automation,Institutionen för biomedicinsk teknik,Institutioner vid LTH,Lunds Tekniska Högskola,Industrial Electrical Engineering and Automation,Department of Biomedical Engineering,Departments at LTH,Faculty of Engineering, LTH
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- Diehl, Stefan (författare)
- Lund University,Lunds universitet,Numerisk analys,Forskargrupper vid Lunds universitet,Partiella differentialekvationer,Matematik LTH,Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,Numerical Analysis,Lund University Research Groups,Partial differential equations,Mathematics (Faculty of Engineering),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- IWA Publishing, 1996
- 1996
- Engelska.
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Ingår i: Water Science and Technology. - : IWA Publishing. - 0273-1223. ; 34:5, s. 85-92
- Relaterad länk:
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http://dx.doi.org/10...
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Abstract
Ämnesord
Stäng
- When coupling a model of the biological reactor to a model of the settler, difficulties appear because of the different representations used for the particulate material. A combined model of the entire activated sludge process needs to include an algorithm for the dynamic propagation of the biological components of the particulate material through the secondary clarifier. In particular, this is of importance for an accurate description of the sludge that is recycled to the biological reactor. Two one-dimensional algorithms have been evaluated by means of numerical simulations. The first algorithm investigated is the one by Otterpohl and Freund in 1992 and some inherent problems of this method are discussed. For example, it will produce oscillating solutions as the number of layers in the settler model increases. Therefore, an alternative algorithm is proposed. It is based on a percentage vector that describes the different particulate biological components as fractions of the total suspended solids concentration. The vector is updated for every layer in the settler model by a robust numerical method. The algorithm is derived analytically, is computationally efficient and does not exhibit any oscillatory behaviour.
Ämnesord
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Miljöbioteknik -- Vattenbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Biotechnology -- Water Treatment (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Nyckelord
- thickening
- suspended solids
- solids flux
- simulation
- secondary clarifier
- one-dimensional model
- mathematical modelling
- clarification
- Activated sludge
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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