EP 0000230 B1 19810121 - PROCESS FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
Title (en)
PROCESS FOR THE BIOLOGICAL PURIFICATION OF WASTE WATER
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)
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