Titre :
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Manual on the causes and control of activated sludge bulking and foaming. 2e ed
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Auteurs :
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D. Jenkins ;
M. Richard ;
G. Daigger
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Type de document :
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ouvrage
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Editeur :
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Chelsea, USA : Lewis publishers, 1993
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Format :
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193 p.
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Langues:
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= Anglais
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Catégories :
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EAU
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Mots-clés:
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BOUES ACTIVEES
;
BACTERIE FILAMENTEUSE
;
FOISONNEMENT DES BOUES
;
PREVENTION
;
MOUSSAGE
;
MICROORGANISME DE L'EPURATION
;
SEPARATION SOLIDE LIQUIDE
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Résumé :
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This manual deals with all aspects of activated sludge solids separation problems. It stats with a chapter that describes the nature of activated sludge and its solids separation problems ; it traces their origins to fundamental physical, chemical and microbiological properties of the activated sludge. The important role of filamentous organisms is discussed. Chapter 2 detailed methods for the microscopic characterization of activated sludge for diagnosis of solids separation problems and its "general health" are presented. Chapter 3 is a discussion on how to remedy and prevent activated sludge bulking. The theory of activated sludge settling in secondary clarifiers is discussed and is used to develop methods of clarifier and aeration basin management for combatting bulking sludge. The use pf polymers, chlorine, and hydrogen peroxide for bulking control is presented. The final chapter discusses the causes and controls of activated sludge foaming. the role of surfactants, mocroorganisms such as Nocardia spp. and Microthrix parvicella is outlined.The manual contains an extensive bibliography on all aspects of activated sludge solids separation problems.
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