Method and system for compounding fertilizer from manure without nutrient emission
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United States of America Patent
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Oct 6, 2020
Grant Date -
Apr 25, 2019
app pub date -
Aug 3, 2018
filing date -
Oct 24, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method for reclaiming nutrients from dairy manure includes a centrifuge for separating a liquid fraction of the manure from a solid fraction comprising organic material; a mechanical vapor recompression evaporator (“MVR”) to receive the liquid fraction from the centrifuge and evaporating the liquid fraction by mechanical vapor recompression to produce ammonia-laden water vapor and a concentrated nutrient slurry; a dryer for drying the nutrient slurry to a selected moisture content to be available as an ingredient in compounded fertilizer; and an ammonia stripping tower assembly to receive ammonia-laden water vapor from the MVR and from it to precipitate ammonium sulphate salt and condense water as separate products.
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