METHOD FOR TAKING OUT INORGANIC PHOSPHORUS COMPOUND FROM INCINERATED ASH OF LIVESTOCK FECES

Title:

METHOD FOR TAKING OUT INORGANIC PHOSPHORUS COMPOUND FROM INCINERATED ASH OF LIVESTOCK FECES

Document Type and Number:

Japanese Patent JP2012096972

Kind Code:

A

Abstract:

To provide a means for efficiently taking out an inorganic phosphorus compound while using inexpensive sulfuric acid for eluting phosphorus, in a method for recovering phosphorus as the inorganic phosphorus compound from incinerated ash of livestock feces.

The present invention relates to a method including: a step where sulfuric acid is added to incinerated ash of livestock feces to adjust a pH to ≤1.8 and phosphorus is eluted; a step where calcium chloride is added to the resulting phosphorus eluate, and thereby sulfate ions are deposited as calcium sulfate and removed; and a step where calcium hydroxide is added to resulting sulfuric acid-freed liquid to adjust a pH to ≥4.0 and phosphorus is recovered as an inorganic phosphorus compound composed mainly of an apatite or the like.

Inventors:

TSUCHIDE YUTAKA
SEKIDO TOMOO
OTA YASUKO

Application Number:

JP2010247710A

Publication Date:

May 24, 2012

Filing Date:

November 04, 2010

Export Citation:

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Assignee:

UNIV MIYAZAKI

International Classes:

C01B25/455; B09B3/00; C01B25/45; C05B7/00

Domestic Patent References:

JP2009207983A	2009-09-17
JP2011213558A	2011-10-27
JPH10101332A	1998-04-21
JPS5375196A	1978-07-04
JP2004337807A	2004-12-02
JP2007070217A	2007-03-22
JP2003211190A	2003-07-29
JP2002001259A	2002-01-08
JPS60166207A	1985-08-29
JPS52101692A	1977-08-25

Attorney, Agent or Firm:

Yusuke Hiraki
Satoshi Fujita
Shinji Endo

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