Method for processing a liquid nitrogen rich organic waste product, thereby obtained fertilizer solution and use thereof
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United States of America Patent
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Aug 12, 1997
Grant Date -
N/A
app pub date -
Jan 4, 1995
filing date -
May 13, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for processing a liquid nitrogen-rich organic waste product, in particular a manure product, to an aqueous fertilizer solution utilizes a biological conversion process so as to obtain a biologically stable fertilizer solution. This conversion process includes at least a nitrification step wherein nitrifiable ammonium nitrogen is converted in nitrate nitrogen and, only if the fraction to be nitrified has a too high content of nitrifiable nitrogen, a denitrification step. The fertilizer solution is separated off after the nitrification step so that it contains nitrate and only up to 150 mg NH.sub.4.sup.+ -N/l at most. The fertilizer solution can be used as leaf nutrition or in a hydroponic system.
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Cited Art Landscape
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