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1. WO1994029227 - PROCESS FOR PURIFYING SULPHIDE-CONTAINING WASTE WATER

Publication Number WO/1994/029227
Publication Date 22.12.1994
International Application No. PCT/NL1994/000132
International Filing Date 09.06.1994
Chapter 2 Demand Filed 12.10.1994
IPC
C01B 17/05 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
17Sulfur; Compounds thereof
02Preparation of sulfur; Purification
04from gaseous sulfur compounds including gaseous sulfides
05by wet processes
C02F 3/34 2006.01
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
CPC
C01B 17/05
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
17Sulfur; Compounds thereof
02Preparation of sulfur; Purification
04from gaseous sulfur compounds including gaseous sulfides
05by wet processes
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
Applicants
  • PAQUES B.V. [NL]/[NL] (AllExceptUS)
  • BUISMAN, Cees, Jan, Nico [NL]/[NL] (UsOnly)
Inventors
  • BUISMAN, Cees, Jan, Nico
Agents
  • DE BRUIJN, Leendert, C.
Priority Data
930100010.06.1993NL
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR PURIFYING SULPHIDE-CONTAINING WASTE WATER
(FR) aROCEDE POUR PURIFIER DES EAUX USEES CONTENANT DU SULFURE
Abstract
(EN)
A process is described for purifying waste water containing sulphide, comprising oxidising the sulphide to elemental sulphur in a reactor with sulphide-oxidising bacteria in the presence of oxygen, and separating from the waste water at least a part of the sulphur formed during the oxidation, while recycling a part of the elemental sulphur separated from the reactor effluent into the reactor in such a way that a concentration of elemental sulphur of at least 1 g/l is maintained in the reactor. The sulphur, in the form of aggregates, is used as a carrier material for the sulphide-oxidising bacteria.
(FR)
Est décrit un procédé pour purifier des eaux usées contenant du sulfure, consistant à oxyder le sulfure pour obtenir du soufre élémentaire dans un réacteur avec des bactéries oxydant le sulfure, en présence d'oxygène, et à séparer des eaux usées au moins une partie du soufre formé pendant l'oxydation, tout en recyclant dans le réacteur une partie du soufre élémentaire séparé des effluents du réacteur, de telle manière qu'une concentration de soufre élémentaire d'au moins 1g/l soit maintenue dans ce dernier. Le soufre, sous forme d'agrégats, s'utilise comme matériau de support pour les bactéries oxydant le sulfure.
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