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1. (WO1987003574) PROCESS AND PLANT FOR PURIFYING WASTE WATER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1987/003574 International Application No.: PCT/EP1986/000715
Publication Date: 18.06.1987 International Filing Date: 06.12.1986
IPC:
C02F 3/00 (2006.01) ,C02F 3/08 (2006.01) ,C02F 3/12 (2006.01) ,C02F 3/30 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
02
Aerobic processes
08
using moving contact bodies
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
02
Aerobic processes
12
Activated sludge processes
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
30
Aerobic and anaerobic processes
Applicants:
FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWAND [DE/DE]; TEN FORSCHUNG E.V.; Leonrodstr. 54; D-8000 München 19, DE (AllExceptUS)
KUNZ, Peter [DE/DE]; DE (UsOnly)
Inventors:
KUNZ, Peter; DE
Agent:
LICHTI, Heiner @; Durlacher Strasse 31 Postfach 41 07 60 D-7500 Karlsruhe 41, DE
Priority Data:
P 35 43 432.509.12.1985DE
Title (EN) PROCESS AND PLANT FOR PURIFYING WASTE WATER
(FR) PROCEDE ET INSTALLATION DE PURIFICATION DES EAUX USEES
Abstract:
(EN) To purify waste water a process is proposed in which, in addition to physical pre-clarification (5) with the formation of a biological primary sludge, a biological pre-treatment (8) is envisaged in which conversion of the material is controlled in order to adjust the loading in the following treatment stages. The sludge accruing in the biological pre-treatment is separated by filters (23) from the waste water and fed to the primary sludge. As a result of the biological pre-treatment, suspended inorganic and organic matter is removed from the waste water, as well as easily convertible and dissolved organic compounds, so that they do not overload the subsequent processing stages. By controlling the conversion of material it is possible to vary in a specific manner the loading of the subsquent processing stages, for example to hold it constant irrespective of the inflow conditions in the pre-clarification stage. If a biological post-treatment is effected, it is possible to adjust the balance of nutrients in the post-clarification stage by controlling the conversion of material in the pre-clarification stage.
(FR) Procédé de purification des eaux usées, dans lequel est prévu, en plus d'une clarification préliminaire (5) physique avec formation d'une boue primaire biologique, un traitement préalable biologique (8) dans lequel la conversion de la matière est régulée afin de moduler la charge dans les étapes ultérieures du traitement. La boue produite lors du traitement préalable biologique est séparée des eaux usées par des filtres (23) et acheminée vers la boue primaire. Le traitement préalable biologique permet d'éliminer des eaux usées des matières organiques et inorganiques en suspension ainsi que des composés organiques facilement convertibles et dissous, de sorte qu'ils n'apparaissent pas dans la charge lors des étapes ultérieures du traitement. En régulant la conversion de la matière, il est possible de faire varier d'une manière spécifique la charge des étapes ultérieures du traitement, par exemple de la maintenir constante quelles que soient les conditions d'alimentation lors de l'étape de clarification préliminaire. Si un traitement biologique ultérieur est effectué, il est possible de moduler l'équilibre des substances nutritives lors de l'étape de clarification ultérieure en régulant la conversion de la matière lors de l'étape de clarification préliminaire.
Designated States: DK, US
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0265442AU1987068403