Title:
【発明の名称】水の浄化方法
Document Type and Number:
Japanese Patent JPH0751239
Kind Code:
B2
Abstract:
PURPOSE:To obtain treated water which is purified at a high degree by subjecting water contg. org. matter or the org. matter and phosphorus to a flocculation treatment with an inorg. flocculating agent, then introducing the water into an active carbon adsorption stage and treating the effluent of the active carbon adsorption stage by a film separating stage. CONSTITUTION:The waste water 1 is subjected to the removal of BOD, nitrogen, etc., in a biological treating stage 2 and is then introduced into a solid-liquid separating stage 3 where biological sludge is separated and the separated sludge 4 is returned to the biological treating stage 2. The separated water 5 is introduced into a flocculation mixing tank 6 where the inorg. flocculating agent 7 and if necessary, an alkali agent 8 for pH adjustment are added to the water, by which the remaining COD components and phosphorus are flocculated. The flocculated water 9 contg. the flocculated flocks is introduced in downward current or upward current to the active carbon adsorption stage 10 where the COD components dissolved in the flocculated water to remain therein are adsorbed. The effluent 11 of the active carbon adsorption stage 10 is treated in the membrane separating stage 12 and permeated water 13 is released Thickened sludge 14 is discharged.
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Inventors:
Takayuki Suzuki
Yoshiyuki Ichiki
Yoshiyuki Ichiki
Application Number:
JP18426590A
Publication Date:
June 05, 1995
Filing Date:
July 13, 1990
Export Citation:
Assignee:
EBARA Infilco Co., Ltd.
EBARA Research Institute, Ltd.
EBARA Research Institute, Ltd.
International Classes:
C02F1/44; C02F1/28; C02F1/52; C02F9/00; (IPC1-7): C02F9/00; C02F1/28; C02F1/44; C02F1/52; C02F9/00
Domestic Patent References:
| JP2172597A |
Attorney, Agent or Firm:
Katsura Yoshimine (1 person outside)