Process for utilizing liquid manure material
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United States of America Patent
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May 14, 2002
Grant Date -
Nov 22, 2001
app pub date -
Jul 6, 1999
filing date -
Jul 3, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for utilizing the material of ammonium-containing effluent which contains further soluble constituents and, possible additional solids, comprising: a) optionally separating off the solids, b) concentrating the substantially solids-free ammonium-containing effluent to give an aqueous concentrate having an increased content of ammonium and additional soluble constituents, with simultaneous recovery of substantially ammonium-free pure water, c) precipitating ammonium as magnesium ammonium phosphate from the ammonium-containing aqueous concentrate, and d) separating off precipitated magnesium ammonium phosphate with recovery of substantially ammonium-free residual concentrate which at least partially contains the additional soluble constituents.
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