|
Titre :
|
The activated sludge process. Part I - Steady state behaviour
|
|
Auteurs :
|
G. Marais ;
G. Ekama
|
|
Type de document :
|
article/chapitre/communication
|
|
Année de publication :
|
1976
|
|
Format :
|
p. 163-200
|
|
Langues:
|
= Anglais
|
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Catégories :
|
TRAITEMENT DE L'EAU RESIDUAIRE
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Mots-clés:
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BOUES ACTIVEES
;
AGE
;
DCO
;
DBO
;
TEMPERATURE
;
NITRIFICATION
|
|
Résumé :
|
This paper attemps a general reorganisation of the activated sludge process theory at steady state in terms of the sludge age. Equations are presented for calculating the masses of active, endogenous residue and inert volatile materil in the reactor. These are integrated with the oxygen demand. Investigation in nitrificationkinetics indicates that in municipal wastewaters the rate limiting step is the conversion of organic TKN to the NH4(-) form. New methods are presented to determine the yield constant, Y, endogenous respiration constant, b, and the substrate conversion rate constant, K. A critical analysis is given of existing design criteria in terms of the sludge loading rate and a procedure for design in terms of sludge age is set out.
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Source :
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Water SA, vol Vol.2, n°4, suppl.
|
