DEVICE FOR RECOVERING PHOSPHORUS FROM PHOSPHORUS-CONTAINING WATER

Japanese Patent JP2014138935

A

PROBLEM TO BE SOLVED: To provide a device for recovering phosphorus from a phosphorus-containing water, in which an agglomerating phosphorus is not precipitated and reduction of the phosphorus recovery rate is prevented.SOLUTION: A device for recovering phosphorus includes a crystallization reaction tower 2 for recovering phosphorus by a crystallization reaction while a raw water containing the phosphorus introduced from a lower part thereof is made to ascend therein. The treated water, which have been made to ascend in the crystallization reaction tower 2 and in which the phosphorus have been recovered, is discharged from a discharge port 20 to the outside of the crystallization reaction tower 2, sent to a pH adjustment tank 3 through an upper part circulation pipeline 30 as a circulating water, and adjusted in a range of pH 8.0-8.7 in the pH adjustment tank 3. The circulating water after pH adjustment is returned and circulated to a lower part of the crystallization reaction tower 2 through a lower part circulation pipeline 31. Thus, a circulatory system is formed between the crystallization reaction tower 2 and the pH adjustment tank 3, and an amount of the circulating water is adjusted within a range of 3-30 times a water amount of the raw water containing the phosphorus introduced from the lower part of the crystallization reaction tower 2.

MITSUTOME KENJI
MORI KAZUKI
MATSUSHIMA YASUO
SATO HIROSHI
KOHARA SHOTARO

JP2014040335A

July 31, 2014

March 03, 2014

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MITSUI ZOSEN ENVIRONMENT ENGINEERING CORP

B01D9/02; C01B25/02; C01B25/32; C02F1/58

JP2000140891A	2000-05-23
JP4519485B2	2010-08-04
JP2006122896A	2006-05-18
JP2000140891A	2000-05-23

Eiichi Maruyama

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