METHOD AND SYSTEM FOR COMPOUNDING FERTILIZER FROM MANURE WITHOUT NUTRIENT EMISSION

摘要

To produce fertilizer, a system and method concentrates manure slurry in amechanical vapor recompression evaporator ("MVR") having a heat exchanger. TheMVRreceives the manure slurry within a first side to evaporate ammonia laden-water vapor from theslurry, leaving a nutrient concentrate. A compressor raises the evaporatedammonia-laden watervapor to a higher energy state. Within a second side of the heat exchanger,the compressed watervapor conveys heat to the slurry. Ammonia-laden water condenses in the secondside at a processtemperature to be conveyed to an ammonia stripping tower where the ammonia-laden water isdispersed into ammonia-laden water droplets. In the tower, a flow of air isdirected across asurface of the ammonia-laden water droplets, the process temperature havingbeen selected topromote the escape of ammonia gas from the ammonia-laden water droplets, theflow of airprovided to entrain ammonia gas in the flow.