Document Type and Number:
Japanese Patent JPS6139118
Kind Code:
B2
Abstract:
Liq. contg. suspended or dissolved material subject to breakdown by microorganisms is treated by injecting a gas contg. oxygen. For some of the time at least part of the liq. has a low dissolved oxygen concn. (defined as the partial pressure) and/or at least part of the liq. has a high dissolved oxygen concen. so that the ratio of carbon dioxide to cellular material formed in the processed is increased. The times during which the high or low concns. are maintained is kept short enough for the influence on the microorganisms not to affect their working adversely. This is also ensured by maintaining the liq. for part of the time at inter. oxygen concns. Used for treating effluent (normally aqs) after solids have been removed. The process may be used as an aerator or as a digester. The changes in oxygen concn. select for the most desirable microorganisms.
Inventors:
MAACHIN BEIRII
DEEBITSUDO ARUBAATO HAINESU
JON KURAAKU OOSUBII
FURANKU KOONERYUUSU ROOSURAA
DEEBITSUDO ARUBAATO HAINESU
JON KURAAKU OOSUBII
FURANKU KOONERYUUSU ROOSURAA
Application Number:
JP3244578A
Publication Date:
September 02, 1986
Filing Date:
March 23, 1978
Export Citation:
Assignee:
ICI PLC
International Classes:
B01F3/04; B01J10/00; C02F3/02; C02F3/22; C02F3/34; C12N1/00; G05D21/00