CONTROLLED RELEASE FERTILISER
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United States of America Patent
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Issued Date -
Feb 19, 2015
app pub date -
Aug 2, 2012
filing date -
Aug 2, 2011
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Abandoned
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Abstract
The present invention provides a fertiliser comprising nutrients adsorbed onto a core material comprising a carbonate mineral. Also provided are methods of producing a solid fertiliser, the method comprising adsorbing nutrients onto a core material comprising a carbonate mineral. The invention also provides a method for treating waste material by anaerobic digestion to produce a nutrient rich liquor and adsorbing nutrients from this liquor onto a core material comprising a carbonate mineral. Also provided are the uses of a carbonate mineral for adsorbing phosphorus from anaerobic digestion liquor and for the control release of phosphorus from a fertiliser.
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