The effect of filter cake viscoelasticity on filtration: a study of activated sludge dewatering

Morten Lykkegaard Christensen

The effect of filter cake viscoelasticity on filtration: a study of activated sludge dewatering

Morten Lykkegaard Christensen

Institut for Kemi og Biovidenskab

Publikation: Ph.d.-afhandling

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Abstract

Aktiv slam er et restprodukt fra spildevandsbehandling, som ofte filtreres for at sænke vandindholdet i slammet. Desværre er det svært at benytte de eksisterende filtreringsmodeller til at optimere processen. Dette projekt omhandler filtreringsafvanding af dels aktiv slam og dels modelpartikler. Studiet viser at komprimeringen af den dannede filterkage er en tidsafhængig proces og ikke alene afhængig af tryk som hidtil antaget. Ud fra denne viden er det vist, hvordan de eksisterende filtreringsmodeller kan modificeres og filtreringsforløbet for aktiv slam simuleres.

Originalsprog	Engelsk
Udgivelsessted	Aalborg
Udgiver	Aalborg Universitet
ISBN'er, trykt	8790033442
Status	Udgivet - 2006

Emneord

Filtrering
Consolidering
Aktiv slam
Modellering
Creep

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title = "The effect of filter cake viscoelasticity on filtration: a study of activated sludge dewatering",

abstract = "Wastewater is usually treated biologically, and a by-product from this treatment is waste-activated sludge with high water content. Sludge is therefore often filtrated to reduce the volume for handling and disposal, and to minimise the water content before incineration of the sludge. However, it is difficult to use the existing mathematical filtration models to simulate and optimise the filtration process. Activated sludge as well as synthetic model particles has been filtrated in this project. The study shows that compression of the formed filter cake is a time dependent process, and not only a function of pressure as assumed when using the conventional models. Moreover, it is shown how the existing filtration models can be modified and the filtration process for activated sludge simulated.",

keywords = "Filtrering, Consolidering, Aktiv slam, Modellering, Creep, Filtration, Consolidation, Activated sludge, Modelling, Creep",

author = "Christensen, {Morten Lykkegaard}",

year = "2006",

language = "English",

isbn = "8790033442",

publisher = "Aalborg Universitet",

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T1 - The effect of filter cake viscoelasticity on filtration

T2 - a study of activated sludge dewatering

AU - Christensen, Morten Lykkegaard

PY - 2006

Y1 - 2006

N2 - Wastewater is usually treated biologically, and a by-product from this treatment is waste-activated sludge with high water content. Sludge is therefore often filtrated to reduce the volume for handling and disposal, and to minimise the water content before incineration of the sludge. However, it is difficult to use the existing mathematical filtration models to simulate and optimise the filtration process. Activated sludge as well as synthetic model particles has been filtrated in this project. The study shows that compression of the formed filter cake is a time dependent process, and not only a function of pressure as assumed when using the conventional models. Moreover, it is shown how the existing filtration models can be modified and the filtration process for activated sludge simulated.

AB - Wastewater is usually treated biologically, and a by-product from this treatment is waste-activated sludge with high water content. Sludge is therefore often filtrated to reduce the volume for handling and disposal, and to minimise the water content before incineration of the sludge. However, it is difficult to use the existing mathematical filtration models to simulate and optimise the filtration process. Activated sludge as well as synthetic model particles has been filtrated in this project. The study shows that compression of the formed filter cake is a time dependent process, and not only a function of pressure as assumed when using the conventional models. Moreover, it is shown how the existing filtration models can be modified and the filtration process for activated sludge simulated.

KW - Filtrering

KW - Consolidering

KW - Aktiv slam

KW - Modellering

KW - Creep

KW - Filtration

KW - Consolidation

KW - Activated sludge

KW - Modelling

KW - Creep

M3 - PhD thesis

SN - 8790033442

PB - Aalborg Universitet

CY - Aalborg

ER -

The effect of filter cake viscoelasticity on filtration: a study of activated sludge dewatering

Abstract

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