Titre :
|
The operation of a selector for the control of foam-foaming bacteria in activated sludge
|
Auteurs :
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C. Forster ;
R. Foot
|
Type de document :
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article/chapitre/communication
|
Année de publication :
|
1997
|
Format :
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p. 237-241
|
Langues:
|
= Anglais
|
Catégories :
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TRAITEMENT DE L'EAU RESIDUAIRE
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Mots-clés:
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BOUES ACTIVEES
;
FOISONNEMENT DES BOUES
;
BACTERIE FILAMENTEUSE
;
CONTROLE
;
AERATION
|
Résumé :
|
Details are presented concerning the operation of a two-stage selector used in conjunction with an activated sludge process. The first-stage of the selector was not aerated, the second-stage had the facility for variable aeration. The prime objective of using the selector was to effect a sufficient reduction in the numbers of Microthrix parvicella to minimise the potential for the formation of stable foam in the aeration tank. In an extended trial (> 1 year) it was found that the most effective regime was when the second-stage was subjected to an aeration period of between 9 and 12 hours. It was noted that none of the changes in the aeration times had any effect on the population of the secondary filamentous species, Nostocoida limicola.
|
Source :
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Environmental technology, vol.18, n°2
|