TREATMENT OF WASTE WATER CONTAINING LOWER PHOSPHORIC ACID

Title:

TREATMENT OF WASTE WATER CONTAINING LOWER PHOSPHORIC ACID

Document Type and Number:

Japanese Patent JPS6075393

Kind Code:

A

Abstract:

PURPOSE: To remove effectively all the phosphorus compounds in waste water all at once by oxidizing the waste water contg. lower phosphoric acid ions, adding a hardly soluble phosphoric acid forming agent, and separating the formed deposit.

CONSTITUTION: Gaseous chlorine such as gaseous chlorine, etc. is allowed to react with waste water contg. lower phosphoric acid ions, and the ions are converted into pentavalent orthophosphoric acid ions. Then a hardly soluble phosphoric acid salt forming agent such as slaked lime is added and aged to form and deposit apatite. The formed deposit is separated and removed. The lower phosphoric acid ions in the waste water is effectively removed along with orthophosphoric acid ions and polyphosphoric acid ions.

Inventors:

IMAMURA KENNOSUKE
KASAMA TADASHI
WATANABE YOSHIKAZU

Application Number:

JP18066183A

Publication Date:

April 27, 1985

Filing Date:

September 30, 1983

Export Citation:

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Assignee:

NIPPON CHEMICAL IND

International Classes:

C02F1/58; C02F1/72; (IPC1-7): C02F1/58; C02F1/72

Domestic Patent References:

JPS57167790A	1982-10-15
JPS58128187A	1983-07-30

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