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1. WO2000039035 - PROCESS FOR THE TREATMENT OF WASTE WATER CONTAINING HEAVY METALS

Publication Number WO/2000/039035
Publication Date 06.07.2000
International Application No. PCT/NL1999/000815
International Filing Date 29.12.1999
Chapter 2 Demand Filed 19.07.2000
IPC
C02F 3/28 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
28Anaerobic digestion 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
C02F 9/00 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
9Multistep treatment of water, waste water or sewage
CPC
C02F 2101/006
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
006Radioactive compounds
C02F 2101/101
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
101Sulfur compounds
C02F 2101/20
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
20Heavy metals or heavy metal compounds
C02F 3/107
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
02Aerobic processes
10Packings; Fillings; Grids
105Characterized by the chemical composition
107Inorganic materials, e.g. sand, silicates
C02F 3/2806
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
28Anaerobic digestion processes
2806Anaerobic processes using solid supports for microorganisms
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 BIO SYSTEMS B.V. [NL/NL]; P.O. Box 52 NL-8560 AB Balk, NL (AllExceptUS)
  • BUISMAN, Cees, Jan, Nico [NL/NL]; NL (UsOnly)
  • DIJKMAN, Hendrik [NL/NL]; NL (UsOnly)
Inventors
  • BUISMAN, Cees, Jan, Nico; NL
  • DIJKMAN, Hendrik; NL
Agents
  • DE BRUIJN, Leendert, C.; Nederlandsch Octrooibureau Scheveningseweg 82 P.O. Box 29720 NL-2502 LS The Hague, NL
Priority Data
98204463.829.12.1998EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE TREATMENT OF WASTE WATER CONTAINING HEAVY METALS
(FR) PROCEDE DE TRAITEMENT DES EAUX USEES QUI CONTIENNENT DES METAUX LOURDS
Abstract
(EN)
A process for the treatment of waste water containing heavy metals is disclosed in which sulphur components and/or metals are biologically reduced to precipitate the metals as water-insoluble metal species, which are separated from the waste water. The biological reduction and the precipitation of the metal species are carried out in a moving sand bed, in which sand particles partly immobilise the bacteria and retain the precipitated metal species, treated waste water is separated from the precipitated metal species, and the precipitated metal species are subsequently separated from the sand particles. Metals like selenium and uranium can be precipitated without sulphur components, whereas metals like antimony, cadmium, copper, zinc and the like are precipitated as sulphides.
(FR)
L'invention concerne un procédé de traitement des eaux usées qui contiennent des métaux lourds selon lequel les composants de soufre et/ou les métaux sont biologiquement réduits de façon à précipiter les métaux sous forme d'espèces métalliques hydro-insolubles, métaux qu'on sépare ensuite des eaux usées. On procède à la réduction biologique et à la précipitation des espèces métalliques dans un lit de sable en mouvement, dans lequel les particules de sable immobilisent en partie les bactéries et confinent les espèces métalliques précipitées. Les eaux usées traitées sont séparées des espèces métalliques précipitées, et ces dernières sont ensuite séparées des particules de sable. Des métaux, tels que le sélénium et l'uranium sont précipités sans composants de soufre, alors que les métaux, tels que l'antimoine, le cadmium, le cuivre, le zinc et analogues, sont précipités sous forme de sulfures.
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