Method for processing a liquid nitrogen rich organic waste...

Details Method for processing a liquid nitrogen rich organic waste... Method for processing a liquid nitrogen rich organic waste...

C - Chemistry, Metallurgy

05

F

C05F 3/00 (2006.01) C02F 3/00 (2006.01) C05F 17/00 (2006.01) C05G 1/00 (2006.01)

Patent

CA 2135513

- 31 - ABSTRACT The invention relates to a method for processing a liquid nitrogen rich organic waste product, in particu- lar a manure product, to an aqueous fertilizer solution. The method comprises a biological conversion process so as to obtain a biologically stable fertilizer solution. This conversion process includes at least a nitrifica- tion 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 upto 150 mg NH4+-N/l at the most. The fertilizer solution can be used as leaf nutrition or in a hydroponic system.

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