EP 0000230 A1 19790110 - Process for the biological purification of waste water.
Title (en)
Process for the biological purification of waste water.
Title (de)
Verfahren zur biologischen Reinigung von Abwasser.
Title (fr)
Procédé pour la purification biologique d'eau résiduaire.
Publication
Application
Priority
NL 7707081 A 19770627
Abstract (en)
[origin: US4190528A] Process for the biological purification of waste water in which a suspension of the surplus sludge formed during the purification is hydrolyzed in a basic medium and at elevated temperatures.
IPC 1-7
IPC 8 full level
A23J 1/00 (2006.01); A23K 1/00 (2006.01); C02F 11/18 (2006.01); C02F 11/02 (2006.01)
CPC (source: EP US)
A23J 1/001 (2013.01 - EP US); C02F 11/18 (2013.01 - EP US); Y10S 426/807 (2013.01 - EP)
Citation (search report)
- FR 2332959 A1 19770624 - BAYER AG [DE]
- [A] CH 583525 A5 19770114 - WACKER CHEMIE GMBH
Designated contracting state (EPC)
BE DE FR GB SE
DOCDB simple family (publication)
EP 0000230 A1 19790110; EP 0000230 B1 19810121; DE 2860355 D1 19810312; IT 1105452 B 19851104; IT 7849964 A0 19780621; JP S5413664 A 19790201; NL 7707081 A 19781229; US 4190528 A 19800226; US 4240904 A 19801223
DOCDB simple family (application)
EP 78200057 A 19780621; DE 2860355 T 19780621; IT 4996478 A 19780621; JP 7636578 A 19780623; NL 7707081 A 19770627; US 5443479 A 19790703; US 91735978 A 19780620