Process for treating residue of organic material
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United States of America Patent
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Apr 14, 2009
Grant Date -
Jul 21, 2005
app pub date -
Jun 2, 2003
filing date -
May 31, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for treating organic material, separating calcium and recovering phosphorus and to utilization of the obtained products and their use as a soil conditioner and a fertilizer as well as for providing carbon dioxide traps in gas cleaning. In the process, organic ingredients are separated from calcium-phosphate-containing ingredients, the calcium-phosphate-containing ingredients are dissolved in an acid-containing solution and/or the calcium is precipitated as a salt corresponding to the acid, and optionally phosphoric acid formed from a phosphate ion is separated. The invention also relates to a calcium-carbonate-containing product and a phosphoric-acid containing product, which are prepared by the process of the invention.
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