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1. AU1997034666 - Biological treatment of spent caustics

Office
Australie
Numéro de la demande 34666/97
Date de la demande 23.07.1997
Numéro de publication 1997034666
Date de publication 23.04.1998
Type de publication A
CIB
C12N 1/00
CCHIMIE; MÉTALLURGIE
12BIOCHIMIE; BIÈRE; SPIRITUEUX; VIN; VINAIGRE; MICROBIOLOGIE; ENZYMOLOGIE; TECHNIQUES DE MUTATION OU DE GÉNÉTIQUE
NMICRO-ORGANISMES OU ENZYMES; COMPOSITIONS LES CONTENANT; CULTURE OU CONSERVATION DE MICRO-ORGANISMES; TECHNIQUES DE MUTATION OU DE GÉNÉTIQUE; MILIEUX DE CULTURE
1Micro-organismes, p.ex. protozoaires; Compositions les contenant; Procédés de culture ou de conservation de micro-organismes, ou de compositions les contenant; Procédés de préparation ou d'isolement d'une composition contenant un micro-organisme; Leurs milieux de culture
C01B 17/74
CCHIMIE; MÉTALLURGIE
01CHIMIE INORGANIQUE
BÉLÉMENTS NON MÉTALLIQUES; LEURS COMPOSÉS
17Soufre; Ses composés
69Anhydride sulfurique; Acide sulfurique
74Préparation
C02F 3/34
CCHIMIE; MÉTALLURGIE
02TRAITEMENT DE L'EAU, DES EAUX RÉSIDUAIRES, DES EAUX OU BOUES D'ÉGOUT
FTRAITEMENT DE L'EAU, DES EAUX RÉSIDUAIRES, DES EAUX OU BOUES D'ÉGOUT
3Traitement biologique de l'eau, des eaux résiduaires ou des eaux d'égout
34caractérisé par les micro-organismes utilisés
CPC
C02F 3/345
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
34characterised by the microorganisms used
345for biological oxidation or reduction of sulfur compounds
Y10S 210/916
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
210Liquid purification or separation
902Materials removed
916Odor, e.g. including control or abatement
C02F 3/34
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
34characterised by the microorganisms used
Déposants Thiopaq Sulfur Systems B.V.
Inventeurs Bontsema, Jan
Buisman, Cees Jan Nico
De Zwart, Jolyn Martha Maria
Janssen, Albert Jozef
Kuenen, Johannes Gijsbrecht
Lettinga, Gatze
Van Straten, Gerrit
Données relatives à la priorité 96202138 29.07.1996 EP
Titre
(EN) Biological treatment of spent caustics
Abrégé
(EN) A process for the biological treatment of a spent caustic solution containing sulphides is disclosed, wherein the solution is introduced into an aerobic reactor containing sulphide-oxidising bacteria, and the sulphides are partly converted to elemental sulphur and partly to sulphate by controlling the redox potential in the reactor at a value below -300 mV (against an Ag/AgCl reference electrode), or below -97 (against a H2 reference electrode). Also disclosed is process for the biological treatment of an aqueous solution containing sulphides and/or mercaptans in an aerobic reactor, wherein the solution is treated in the presence of bacteria of the new species $i(Methylophaga sulfidovorans).