Title:
BIOLOGICAL TREATMENT TANK
Document Type and Number:
Japanese Patent JP3536930
Kind Code:
B2
Abstract:
PURPOSE: To provide a biological treatment tank of a waste water purification tank which is not affected by the variation in the flow rate of water to be treated or seasonal temperature change, has a high treatment capacity, and facilitates the construction on the site.
CONSTITUTION: In a tank having an inflow port 23 and an outflow port 26, a porous plate 29 is arranged in the bottom, an air diffusion member 24 is installed above the porous plate 29, and a biological reactor 15 communicating with the inflow port 23 and a filter layer 27, in which a porous plate 18 is arranged in the bottom and a granular filter medium is mounted on the porous plate 18, are formed. Moreover, in the biological treatment tank, an air diffusion member 19 is installed under the porous plate 18, a drainage pump 20 which discharge water outside the system is installed above the filter layer 27, and a filtration chamber 16 communicating with the bottom of the biological reactor 15 and a treated water chamber 17 communicating with the bottom of the filtration chamber 16 and the outflow port 26 are installed.
More Like This:
Inventors:
Furuichi, Masahiro
Katagai, Nobuyoshi
Fujita, Katsuhide
Katagai, Nobuyoshi
Fujita, Katsuhide
Application Number:
JP690694A
Publication Date:
June 14, 2004
Filing Date:
January 26, 1994
Export Citation:
Assignee:
HITACHI CHEM CO LTD
International Classes:
C02F3/06; (IPC1-7): C02F3/06