Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2002-07-26
2008-08-12
Hruskoci, Peter A. (Department: 1797)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C071S021000, C071S033000, C210S725000, C210S727000, C210S903000, C210S906000, C210S916000
Reexamination Certificate
active
07410589
ABSTRACT:
The invention relates to a method of treating manure such that odor from the manure is significantly reduced or eliminated and producing therefrom recyclable water, value-added biosolids and ammonia. Specifically, the manure is combined with lime at high pH. The material is mixed under negative pressure and the basic conditions cause ammonia to be evolved from the manure which is then drawn off and recovered. A coagulating agent is then added which further promotes floc formation within the manure. Following further mixing, flocs are separated from the liquid portion. A struvite-promoting chemical and a coagulant are then added to the liquid portion which causes further floc formation, and the flocs are again separated from the substantially clear liquid. It is of note that as a result of this process, the solids are highly hydrophobic and dry very quickly. It is of further note that solids isolated from either step can be combined and sold, for example, as fertilizer, as discussed below. The clear liquid can be used, for example, in barn washes or for horticultural watering.
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Battison Adrian D.
Dupuis Ryan W.
Hruskoci Peter A.
Williams Michael R.
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