Concentration and Extraction of Phosphorus from Swine Manure Slurries (as Struvite)

 
Pilot Scale System   

Project leaders:

Dr. Robert Burns, Timothy Shepherd, Dr. Raj Raman, Dr. Ken Stalder, Lara Moody

Project Background:

Excessive loading of phosphorus (P) onto agricultural lands has been recognized as a threat to surface water quality. Forced precipitation of struvite (MgNH₄PO₄6H₂0) from animal waste slurries prior to land application can reduce dissolved reactive P levels in manure slurries. Subsequent recovery of the precipitated phosphorus would result in the requirement for less land to agronomically apply the manure slurry and the ability to concentrate and remove P from the system.

Struvite

Project Objectives:

• Optimize the phosphorus concentration and extraction process.
• Develop a pilot scale precipitation and recovery system.
• Determine the agronomic value of the recovered precipitate.

The long term goal of this project is to develop a manure management technology that allows animal feeding operations to reduce the levels of phosphorus being applied to the land while generating a value added product with the excess nutrients.

AWM Related Research Papers:

T.A. Shepherd, R. T. Burns, L.B. Moody, D.R. Raman, K.J. Stalder. 2007. Development of an Air Sparged Continuous Flow Reactor for Struvite Precipitation from Two Different Liquid Swine Manure Storage Systems. Proceedings: International Symposium on Air Quality and Waste Management for Agriculture. September 16-19, 2007. Broomfield,  CO.

Shepherd, T.A., R.T. Burns, and L.B. Moody. 2006. Investigation of a Magnesium Injection System to Determine Amendment Requirements for Phosphate Precipitation. ASABE Paper # 064109. St. Joseph, MI: ASABE

Oh, I. H., J. H. Lee, B. H. Choi, N. S. Myung, and R. T. Burns. 2006. Recovery of Phosphorous in Animal Wastewater by Struvite Forming. The Korean Society for Agricultural Machinery. Vol. 31, no. 1. p. 46-51.

Celen, I. R. T. Burns, R. B. Robinson, D. R. Raman, L. B. Moody, and J. R. Buchanan. 2004. Reduction of Dissolved Reactive Phosphorous from Swine Wastewater via Struvite Precipitation: Influence of pH Changes and Mg Addition. Proceedings of the International Conference on Struvite: Its Role in Phosphorous Recovery and Reuse. Cranfield University, England.

Burns, R. T., L. B. Moody, I. Celen, and J. Buchanan. 2002. Optimization of Phosphorous Precipitation from Swine Manure Slurries to Enhance Recovery. Proceedings of the International Conference 'From Nutrient Removal to Recovery'. Amsterdam, The Netherlands, p. 121-128.

Burns, R.T. and L.B. Moody. 2002. Phosphorus recovery from animal manures using optimized struvite precipitation. Coagulants and Flocculants: Global Market and Technical Opportunities for Water Treatment Chemicals. Chicago, Illinois. May 22-24, 2002.

Burns, R.T., L.B. Moody, F.R. Walker and D.R. Raman. 2001. Laboratory and In-Situ Reductions of  Soluble Phosphorus in Liquid Swine Waste Slurries. Environmental Technology. 22(11): 1273-1278.

Burns, R.T., F.R. Walker, L.B. Moody, D.R. Raman, R.E. Yoder. 2001. Aluminum chloride as an amendment to reduce soluble phosphorus concentration of land applied swine manure. Proceedings of the International Phosphorus Transfer Workshop - Connecting Phosphorus Transfer from Agriculture to Impacts in Surface Waters. IGER North Wyke, Okehampton, Devon EX20 2SB, UK.

Beal, L.J., R.T. Burns, K.J. Stalder. Effect of Anaerobic Digestion on Struvite Production for Nutrient Removal from Swine Waste Prior to Land Application. Proceedings of the 1999 ASAE Annual International Meeting, Toronto, Canada. Paper No. 994042. 1999.

Burns, R.T.; L.B. Moody; I. Celen; J.R. Buchanan. 2003. Optimization of phosphorus precipitation from swine manure slurries to enhance recovery. Water Science Technology. 48(1): 139-146.