Title:
METHOD AND APPARATUS FOR TREATING WASTEWATER
Document Type and Number:
WIPO Patent Application WO/1998/055407
Kind Code:
A1
Abstract:
A method and apparatus for treating secondarily wastewater by circulating primarily treated water T1 after removal of dust and inclusions contained in wastewater inside a water line for biological treating, wherein a weir (5) for forming a shooting flow energy absorber having an openable lower portion is provided inside circulating water lines (3a, 3b, 3c) in order to conduct any of an aerobic treating by only an overflow, an anaerobic treating by only a underground flow and aerobic and anaerobic treatings by both of the overflow and the underground flow. In addition to the secondary treating using the shooting flow energy absorber, a higher-level treating is carried out by a biological treating using contact materials.
Inventors:
HIRANO NORIHIKO (JP)
Application Number:
PCT/JP1998/002501
Publication Date:
December 10, 1998
Filing Date:
June 05, 1998
Export Citation:
Assignee:
HIRANO NORIHIKO (JP)
International Classes:
B01F3/04; C02F3/12; C02F3/24; C02F3/30; (IPC1-7): C02F3/14; C02F3/30; C02F3/08; C02F3/10
Foreign References:
| JPH0135717B2 | 1989-07-26 | |||
| JPH08290191A | 1996-11-05 | |||
| JPS61212393A | 1986-09-20 | |||
| JPH0137195B2 | 1989-08-04 |
Attorney, Agent or Firm:
Yagi, Hidehito (Daisankarasawa Building 5F 23-8, Uchikanda 3-chom, Chiyoda-ku Tokyo, JP)
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