Open AccessPilot-Scale Investigation of Phosphorus Removal from Swine Manure by the MAnure PHosphorus EXtraction (MAPHEX) System
Author(s) -
Clinton D. Church,
Sarah K. Fishel,
Michael R. Reiner,
Peter J. A. Kleinman,
A.N. Hristov,
Ray B. Bryant
Publication year - 2020
Publication title -
applied engineering in agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.276
H-Index - 54
eISSN - 1943-7838
pISSN - 0883-8542
DOI - 10.13031/aea.13698
Subject(s) - manure , environmental science , phosphorus , manure management , effluent , surface runoff , agronomy , soil water , eutrophication , liquid manure , nutrient , waste management , environmental engineering , chemistry , engineering , biology , ecology , organic chemistry , soil science
Highlights Swine manure contains nutrients and organic material that is beneficial to crops. Farmers are under increasing pressure and regulation to not apply high phosphorus manure to soils. The MAPHEX System removed greater than 96% of the phosphorus in swine manures. Both capital equipment and treatment costs were lower for swine manure than dairy manure. Abstract . Swine manure is typically in slurry form and contains nitrogen (N), phosphorus (P), and organic material that is beneficial to crops. Unfortunately, for economic and logistical reasons, manure tends to be applied to soils near where it is produced and P concentrations increase to the point that they are often in excess of crop demands. With the implication that runoff of excess P contributes to eutrophication of streams and other water bodies, farmers are experiencing increasing pressures and regulation to not apply manure to those soils. We previously reported on an invention capable of removing P from dairy manures. This pilot-scale study shows that the MAPHEX System can remove greater than 96% of the phosphorus in swine manures, and strongly suggests that, once scaled up, the essentially P free effluent could be beneficially used for fertigation without further loading the receiving soils with P. This scaling up has the potential to reduce storage volumes to allow for mitigation of overflow problems during large storms. Furthermore, this study suggests that capital equipment costs and treatment costs for swine manure would be lower than for treating dairy manure. Keywords: Chemical treatment, Manure, Phosphorus, Solid separation, Swine, Treatment systems.