EP 0938455 A2 19990901 - BIOLOGICAL WASTE WATER PURIFICATION PROCESS AND DEVICE
Title (en)
BIOLOGICAL WASTE WATER PURIFICATION PROCESS AND DEVICE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR BIOLOGISCHEN ABWASSERREINIGUNG
Title (fr)
PROCEDE ET DISPOSITIF D'EPURATION BIOLOGIQUE D'EAUX USEES
Publication
Application
Priority
- DE 19644080 A 19961031
- EP 9705847 W 19971023
Abstract (en)
[origin: DE19644080A1] In a waste water purification process carried out in a clarification plant with activated sludge basins more than about 5 m deep, an oxygen-containing gas with a higher oxygen content than air, or pure oxygen, is continuously or temporarily supplied to the mixture of waste water and activated sludge in at least part of the aerobic volume of the activated sludge basin.
IPC 1-7
IPC 8 full level
C02F 3/26 (2006.01)
CPC (source: EP US)
C02F 3/26 (2013.01 - EP US); Y02W 10/10 (2015.05 - EP US)
Citation (search report)
See references of WO 9818727A2
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL SE
DOCDB simple family (publication)
DE 19644080 A1 19980507; AU 6908198 A 19980522; EP 0938455 A2 19990901; US 6280624 B1 20010828; WO 9818727 A2 19980507; WO 9818727 A3 19980709
DOCDB simple family (application)
DE 19644080 A 19961031; AU 6908198 A 19971023; EP 9705847 W 19971023; EP 97948783 A 19971023; US 29728299 A 19990621