EP 0981500 A1 20000301 - METHOD AND APPARATUS FOR BIOLOGICAL REMOVAL OF NITROGEN COMPOUNDS FROM WATER
Title (en)
METHOD AND APPARATUS FOR BIOLOGICAL REMOVAL OF NITROGEN COMPOUNDS FROM WATER
Title (de)
METHODE UND VORRICHTUNG ZUR BIOLOGISCHEN ENTFERNUNG VON STICKSTOFFVERBINDUNGEN IM WASSER
Title (fr)
PROCEDE ET APPAREIL D'EXTRACTION BIOLOGIQUE DE COMPOSES AZOTES DE L'EAU
Publication
Application
Priority
- CZ 9800023 W 19980513
- CZ 147997 A 19970514
Abstract (en)
[origin: WO9851626A1] Method of removing nitrogen and its compounds from water using biological process in activated sludge suspension. The nitrogen in the form of nitrates and nitrites is removed by means of a denitrification proceeding in a fluidized layer of sludge blanket, the layer being formed by a suspension of biological sludge and being kept in a fluidized condition. Apparatus for performing the method comprises an upwards widening denitrification zone (5), into the lower part of which an admission for the water containing nitrates, an admission for the activated sludge and an admission for the substrate, which has been biologically oxidized during the denitrification, mouth.
IPC 1-7
IPC 8 full level
C02F 3/28 (2006.01); C02F 3/12 (2006.01); C02F 3/22 (2006.01); C02F 3/30 (2006.01)
CPC (source: EP)
C02F 3/1247 (2013.01); C02F 3/223 (2013.01); C02F 3/301 (2013.01); C02F 3/302 (2013.01); Y02A 20/208 (2017.12); Y02W 10/10 (2015.05)
Citation (search report)
See references of WO 9851626A1
Designated contracting state (EPC)
AT DE DK ES FR GB IT NL
DOCDB simple family (publication)
WO 9851626 A1 19981119; AU 7028098 A 19981208; CA 2288642 A1 19981119; CZ 147997 A3 19990414; EP 0981500 A1 20000301; PL 336931 A1 20000717; SK 151299 A3 20000612
DOCDB simple family (application)
CZ 9800023 W 19980513; AU 7028098 A 19980513; CA 2288642 A 19980513; CZ 147997 A 19970514; EP 98916800 A 19980513; PL 33693198 A 19980513; SK 151299 A 19980513