AustralieFrV1, PascalFrancis, Corpus, bibRecord, 002696

Electrical field: A historical review of its application and contributions in wastewater sludge dewatering

Identifieur interne : 002696 ( PascalFrancis/Corpus ); précédent : 002695; suivant : 002697

Electrical field: A historical review of its application and contributions in wastewater sludge dewatering

Auteurs : Akrama Mahmoud ; Jérémy Olivier ; Jean Vaxelaire ; Andrew F. A. Hoadley

Source :

Water research : (Oxford) [ 0043-1354 ] ; 2010.

RBID : Pascal:10-0240126

Descripteurs français

Pascal (Inist)
- Eau usée, Déshydratation, Champ électrique, Electrocinétique, Séparation solide liquide, Consommation énergie, Industrie céramique, Particule fine, Boue résiduaire, Industrie pharmaceutique, Industrie alimentaire, Suspension particule, Charge superficielle, Charge électrique, Electroosmose, Analyse élémentaire, Milieu poreux, Traitement déchet, Pollution sol, Traitement électrochimique, Aérosol, Analyse chimique, Pollution air.

English descriptors

KwdEn :
- Aerosols, Air pollution, Ceramics industry, Chemical analysis, Dehydration, Electric charge, Electric field, Electrochemical treatment, Electrokinetics, Electroosmosis, Elementary analysis, Energy consumption, Fine particle, Food industry, Particle suspension, Pharmaceutical industry, Porous medium, Sewage sludge, Soil pollution, Solid liquid separation, Surface charge, Waste treatment, Waste water.

Abstract

Electric field-assisted dewatering, also called electro-dewatering, is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy consumption compared to thermal drying. Electro-dewatering is not a new idea, but the practical industrial applications have been limited to niche areas in soil mechanics, civil engineering, and the ceramics industry. Recently, it has received great attention, specially, in the fields of fine-particle sludge, gelatinous sludge, sewage sludge, pharmaceutical industries, food waste and bull kelp, which could not be successfully dewatered with conventional mechanical methods. This review focuses on the scientific and practical aspects of the application of an electrical field in laboratory/industrial dewatering, and discusses this in relation to conventional dewatering techniques. A comprehensive bibliography of research in the electro-dewatering of wastewater sludges is included. As the fine-particle suspensions possess a surface charge, usually negative, they are surrounded by a layer with a higher density of positive charges, the electric double layer. When an electric field is applied, the usually negative charged particles move towards the electrode of the opposite charge. The water, commonly with cations, is driven towards the negative electrode. Electro-dewatering thus involves the well-known phenomena of electrophoresis, electro-osmosis, and electromigration. Following a detailed outline of the role of the electric double layer and electrokinetic phenomena, an analysis of the components of applied voltage and their significance is presented from an electrochemical viewpoint. The aim of this elementary analysis is to provide a fundamental understanding of the different process variables and configurations in order to identify potential improvements. Also discussed herein is the investigation of the electrical behaviour of a porous medium, with particular emphasis on porous medium conductivity determination.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 10-0240126 INIST
ET :	Electrical field: A historical review of its application and contributions in wastewater sludge dewatering
AU :	MAHMOUD (Akrama); OLIVIER (Jérémy); VAXELAIRE (Jean); HOADLEY (Andrew F. A.)
AF :	Laboratoire de Thermique Energétique et Procédés (EAD 1932), ENSGTI, rue Jules Ferry, BP 7511/64075 Pau/France (1 aut., 2 aut., 3 aut.); Department of Chemical Engineering, Building 35, Clayton Campus, Monash University/Victoria 3800/Australie (4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Water research : (Oxford); ISSN 0043-1354; Coden WATRAG; Royaume-Uni; Da. 2010; Vol. 44; No. 8; Pp. 2381-2407; Bibl. 5 p.
LA :	Anglais
EA :	Electric field-assisted dewatering, also called electro-dewatering, is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy consumption compared to thermal drying. Electro-dewatering is not a new idea, but the practical industrial applications have been limited to niche areas in soil mechanics, civil engineering, and the ceramics industry. Recently, it has received great attention, specially, in the fields of fine-particle sludge, gelatinous sludge, sewage sludge, pharmaceutical industries, food waste and bull kelp, which could not be successfully dewatered with conventional mechanical methods. This review focuses on the scientific and practical aspects of the application of an electrical field in laboratory/industrial dewatering, and discusses this in relation to conventional dewatering techniques. A comprehensive bibliography of research in the electro-dewatering of wastewater sludges is included. As the fine-particle suspensions possess a surface charge, usually negative, they are surrounded by a layer with a higher density of positive charges, the electric double layer. When an electric field is applied, the usually negative charged particles move towards the electrode of the opposite charge. The water, commonly with cations, is driven towards the negative electrode. Electro-dewatering thus involves the well-known phenomena of electrophoresis, electro-osmosis, and electromigration. Following a detailed outline of the role of the electric double layer and electrokinetic phenomena, an analysis of the components of applied voltage and their significance is presented from an electrochemical viewpoint. The aim of this elementary analysis is to provide a fundamental understanding of the different process variables and configurations in order to identify potential improvements. Also discussed herein is the investigation of the electrical behaviour of a porous medium, with particular emphasis on porous medium conductivity determination.
CC :	001D16A; 001D16B06
FD :	Eau usée; Déshydratation; Champ électrique; Electrocinétique; Séparation solide liquide; Consommation énergie; Industrie céramique; Particule fine; Boue résiduaire; Industrie pharmaceutique; Industrie alimentaire; Suspension particule; Charge superficielle; Charge électrique; Electroosmose; Analyse élémentaire; Milieu poreux; Traitement déchet; Pollution sol; Traitement électrochimique; Aérosol; Analyse chimique; Pollution air
ED :	Waste water; Dehydration; Electric field; Electrokinetics; Solid liquid separation; Energy consumption; Ceramics industry; Fine particle; Sewage sludge; Pharmaceutical industry; Food industry; Particle suspension; Surface charge; Electric charge; Electroosmosis; Elementary analysis; Porous medium; Waste treatment; Soil pollution; Electrochemical treatment; Aerosols; Chemical analysis; Air pollution
SD :	Agua residual; Deshidratación; Campo eléctrico; Electrocinética; Separación sólido líquido; Consumo energía; Industria cerámica; Partícula fina; Lodo residual; Industria farmacéutica; Industria alimenticia; Suspensión partícula; Carga superficial; Carga eléctrica; Electro-osmosis; Análisis elemental; Medio poroso; Tratamiento desperdicios; Polución suelo; Tratamiento electroquímico; Aerosol; Análisis químico; Contaminación aire
LO :	INIST-8940A.354000182043890010
ID :	10-0240126

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Pascal:10-0240126

Le document en format XML

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<front><div type="abstract" xml:lang="en">Electric field-assisted dewatering, also called electro-dewatering, is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy consumption compared to thermal drying. Electro-dewatering is not a new idea, but the practical industrial applications have been limited to niche areas in soil mechanics, civil engineering, and the ceramics industry. Recently, it has received great attention, specially, in the fields of fine-particle sludge, gelatinous sludge, sewage sludge, pharmaceutical industries, food waste and bull kelp, which could not be successfully dewatered with conventional mechanical methods. This review focuses on the scientific and practical aspects of the application of an electrical field in laboratory/industrial dewatering, and discusses this in relation to conventional dewatering techniques. A comprehensive bibliography of research in the electro-dewatering of wastewater sludges is included. As the fine-particle suspensions possess a surface charge, usually negative, they are surrounded by a layer with a higher density of positive charges, the electric double layer. When an electric field is applied, the usually negative charged particles move towards the electrode of the opposite charge. The water, commonly with cations, is driven towards the negative electrode. Electro-dewatering thus involves the well-known phenomena of electrophoresis, electro-osmosis, and electromigration. Following a detailed outline of the role of the electric double layer and electrokinetic phenomena, an analysis of the components of applied voltage and their significance is presented from an electrochemical viewpoint. The aim of this elementary analysis is to provide a fundamental understanding of the different process variables and configurations in order to identify potential improvements. Also discussed herein is the investigation of the electrical behaviour of a porous medium, with particular emphasis on porous medium conductivity determination.</div>
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<fC03 i1="21" i2="X" l="FRE"><s0>Aérosol</s0>
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<s5>38</s5>
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<s5>39</s5>
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<s5>39</s5>
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<server><NO>PASCAL 10-0240126 INIST</NO>
<ET>Electrical field: A historical review of its application and contributions in wastewater sludge dewatering</ET>
<AU>MAHMOUD (Akrama); OLIVIER (Jérémy); VAXELAIRE (Jean); HOADLEY (Andrew F. A.)</AU>
<AF>Laboratoire de Thermique Energétique et Procédés (EAD 1932), ENSGTI, rue Jules Ferry, BP 7511/64075 Pau/France (1 aut., 2 aut., 3 aut.); Department of Chemical Engineering, Building 35, Clayton Campus, Monash University/Victoria 3800/Australie (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Water research : (Oxford); ISSN 0043-1354; Coden WATRAG; Royaume-Uni; Da. 2010; Vol. 44; No. 8; Pp. 2381-2407; Bibl. 5 p.</SO>
<LA>Anglais</LA>
<EA>Electric field-assisted dewatering, also called electro-dewatering, is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy consumption compared to thermal drying. Electro-dewatering is not a new idea, but the practical industrial applications have been limited to niche areas in soil mechanics, civil engineering, and the ceramics industry. Recently, it has received great attention, specially, in the fields of fine-particle sludge, gelatinous sludge, sewage sludge, pharmaceutical industries, food waste and bull kelp, which could not be successfully dewatered with conventional mechanical methods. This review focuses on the scientific and practical aspects of the application of an electrical field in laboratory/industrial dewatering, and discusses this in relation to conventional dewatering techniques. A comprehensive bibliography of research in the electro-dewatering of wastewater sludges is included. As the fine-particle suspensions possess a surface charge, usually negative, they are surrounded by a layer with a higher density of positive charges, the electric double layer. When an electric field is applied, the usually negative charged particles move towards the electrode of the opposite charge. The water, commonly with cations, is driven towards the negative electrode. Electro-dewatering thus involves the well-known phenomena of electrophoresis, electro-osmosis, and electromigration. Following a detailed outline of the role of the electric double layer and electrokinetic phenomena, an analysis of the components of applied voltage and their significance is presented from an electrochemical viewpoint. The aim of this elementary analysis is to provide a fundamental understanding of the different process variables and configurations in order to identify potential improvements. Also discussed herein is the investigation of the electrical behaviour of a porous medium, with particular emphasis on porous medium conductivity determination.</EA>
<CC>001D16A; 001D16B06</CC>
<FD>Eau usée; Déshydratation; Champ électrique; Electrocinétique; Séparation solide liquide; Consommation énergie; Industrie céramique; Particule fine; Boue résiduaire; Industrie pharmaceutique; Industrie alimentaire; Suspension particule; Charge superficielle; Charge électrique; Electroosmose; Analyse élémentaire; Milieu poreux; Traitement déchet; Pollution sol; Traitement électrochimique; Aérosol; Analyse chimique; Pollution air</FD>
<ED>Waste water; Dehydration; Electric field; Electrokinetics; Solid liquid separation; Energy consumption; Ceramics industry; Fine particle; Sewage sludge; Pharmaceutical industry; Food industry; Particle suspension; Surface charge; Electric charge; Electroosmosis; Elementary analysis; Porous medium; Waste treatment; Soil pollution; Electrochemical treatment; Aerosols; Chemical analysis; Air pollution</ED>
<SD>Agua residual; Deshidratación; Campo eléctrico; Electrocinética; Separación sólido líquido; Consumo energía; Industria cerámica; Partícula fina; Lodo residual; Industria farmacéutica; Industria alimenticia; Suspensión partícula; Carga superficial; Carga eléctrica; Electro-osmosis; Análisis elemental; Medio poroso; Tratamiento desperdicios; Polución suelo; Tratamiento electroquímico; Aerosol; Análisis químico; Contaminación aire</SD>
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Electrical field: A historical review of its application and contributions in wastewater sludge dewatering

Electrical field: A historical review of its application and contributions in wastewater sludge dewatering

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