Process and plant for biological purification of sewage
Process and plant for the oxygenation of sewage in a biological treatment pond. At an upstream end of a lengthwise section of the pond, water abstracted from the pond is propelled by a pump 21 into a venturi oxygenation device 23, 24, 25 and from there into the nozzles 29, 30 for entraining a second...
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Main Author | |
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Format | Patent |
Language | English French |
Published |
14.08.1987
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Edition | 4 |
Subjects | |
Online Access | Get full text |
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Abstract | Process and plant for the oxygenation of sewage in a biological treatment pond. At an upstream end of a lengthwise section of the pond, water abstracted from the pond is propelled by a pump 21 into a venturi oxygenation device 23, 24, 25 and from there into the nozzles 29, 30 for entraining a secondary flow along f so as to form jets 31, 32 conveying the oxygen bubbles at a high velocity, along X, the bubbles following a rising trajectory over the portion Z, so that they are substantially dissolved before reaching the surface. Applications to activated sludge treatment stations, for carbonated degradation with nitrification and denitrification, if appropriate for a water pretreatment.
L'invention concerne un procédé et une installation d'oxygénation d'eau usée dans un bassin de traitement biologique. A une extrémité amont d'une section longitudinale de bassin, de l'eau prélevée dans le bassin est propulsée par une pompe 21 dans un dispositif d'oxygénation à Venturi 23, 24, 25 et de là dans les tuyères 29, 30 à entraînement d'un débit secondaire selon f de façon à former des jets 31 32 véhiculant les bulles d'oxygène à forte vitesse, selon X, les bulles suivant, sur la portion Z une trajectoire ascendante le tout de façon à ce qu'elles soient substantiellement dissoutes avant de parvenir à la surface. Applications aux stations de traitement à boues activées, pour la dégradation carbonnée avec nitrification et dénitrification, le cas échéant pour un prétraitement d'eau. (CF DESSIN DANS BOPI) |
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AbstractList | Process and plant for the oxygenation of sewage in a biological treatment pond. At an upstream end of a lengthwise section of the pond, water abstracted from the pond is propelled by a pump 21 into a venturi oxygenation device 23, 24, 25 and from there into the nozzles 29, 30 for entraining a secondary flow along f so as to form jets 31, 32 conveying the oxygen bubbles at a high velocity, along X, the bubbles following a rising trajectory over the portion Z, so that they are substantially dissolved before reaching the surface. Applications to activated sludge treatment stations, for carbonated degradation with nitrification and denitrification, if appropriate for a water pretreatment.
L'invention concerne un procédé et une installation d'oxygénation d'eau usée dans un bassin de traitement biologique. A une extrémité amont d'une section longitudinale de bassin, de l'eau prélevée dans le bassin est propulsée par une pompe 21 dans un dispositif d'oxygénation à Venturi 23, 24, 25 et de là dans les tuyères 29, 30 à entraînement d'un débit secondaire selon f de façon à former des jets 31 32 véhiculant les bulles d'oxygène à forte vitesse, selon X, les bulles suivant, sur la portion Z une trajectoire ascendante le tout de façon à ce qu'elles soient substantiellement dissoutes avant de parvenir à la surface. Applications aux stations de traitement à boues activées, pour la dégradation carbonnée avec nitrification et dénitrification, le cas échéant pour un prétraitement d'eau. (CF DESSIN DANS BOPI) |
Author | ALAIN RIGOUARD, PATRICK MICHEAU ET BRUNO WEINZAEPFEL |
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Discipline | Medicine Chemistry Sciences |
DocumentTitleAlternate | PROCEDE ET INSTALLATION D'EPURATION BIOLOGIQUE D'EAUX USEES |
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Notes | Application Number: FR19860001963 |
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PublicationYear | 1987 |
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Snippet | Process and plant for the oxygenation of sewage in a biological treatment pond. At an upstream end of a lengthwise section of the pond, water abstracted from... |
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SubjectTerms | CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
Title | Process and plant for biological purification of sewage |
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