Nutrient Fate in the Full MAnure PHosphorus EXtraction (MAPHEX) System, and Design of a Simplified System (MAPHEX Lite)

Highlights The MAPHEX System removes and concentrates most of the P other nutrients from liquid dairy manures. Most N K are left in fraction for beneficial use farmer. Design expected performance a simplified but much larger is discussed. Abstract. relatively recent concept manureshed highlights problem broken nutrient cycle modern animal agriculture low nitrogen:phosphorus ratio manure relative to crop requirement that results accumulation soils near source areas. One solution avoid transport with deficit P, manure’s bulkiness density present challenges over great distances. While full MAnure PHosphorus EXtraction (MAPHEX) has shown be capable removing greater than 90% manures while leaving on farm, lesser amounts have not been reported on. This study indicates both newly designed Lite System, only conserves more efficient less costly, highly at extracting concentrating solid form phase by farmer source. Therefore, it seems clear Systems, components they include potential play significant role management. Keywords: Chemical treatment, Liquid-solid separation, Manure, Nitrogen, Phosphorus, Potassium, Treatment systems.