Title:
TREATMENT OF FLUORINE-PHOSPHORUS-CONTAINING DISCHARGED WATER
Document Type and Number:
Japanese Patent JP3112613
Kind Code:
B2
Abstract:
PURPOSE: To provide a discharged water treatment method attaining efficient removal of fluorine and prevention from redissolution of calcium phosphate and capable of surely removing fluorine and phosphorus without using a lot of aluminum compounds in a flocculation reaction process in a post stage, in a removing method of fluorine and phosphorus from the discharge water containing fluorine and phosphortus by using the calcium compound.
CONSTITUTION: The treating method of the fluorine.phosphorus containing discharged water consists of a first reaction process by which the calcium compound is added to the discharge water containing fluorine ions and phosphate ions to the reacted in a pH region of pH4 to 8.5 and a second reaction process by which the water after completion of the first reaction process is reacted at a pH region over pH8.5, preferably at pH9 to 11.
Inventors:
Haruki Myuga
Yang Min
Nobuyuki Hoshi
Yang Min
Nobuyuki Hoshi
Application Number:
JP8407094A
Publication Date:
November 27, 2000
Filing Date:
March 30, 1994
Export Citation:
Assignee:
Organo Co., Ltd.
International Classes:
C02F1/58; (IPC1-7): C02F1/58
Domestic Patent References:
| JP5267152A | ||||
| JP5228165A | ||||
| JP5228164A |
Attorney, Agent or Firm:
Yoshimi Hatanaka (2 outside)