Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/25/2017
Publication Date: N/A
Technical Abstract: Background & Objectives: The recovery of phosphorus and proteins from manure could be advantageous to both offset costs and to improve and lessen the environmental impacts of manure. Phosphorous in manure can contaminate rivers, lakes, and bays through runoff, if applied onto a cropland excessively. Protein is a natural resource used in a wide range of commercial applications including feeds and industrial applications. Thus, recovering phosphorous from manure cannot only help reduce such runoffs, but also reduces the use of commercial fertilizer based on phosphate rock. Materials & Methods: A new method for simultaneous extraction of proteins and phosphorus from biological materials has been developed and is presented. The experiments used swine manure solids fraction after solid-liquid separation. Results & Discussion: On a dry-weight basis, it was found that the separated manure solids contained 15.2-17.4 percent (%) proteins and 3.0% phosphorus. Quantitative extraction of phosphorus and proteins from manures was possible with this new system. The phosphorus was first separated from the solids in a soluble extract, then the proteins were separated from the solids and solubilized with an alkali solvent. Both phosphorus and protein recovery were enhanced about 19 and 22% with the inclusion of a rinse after the washing. The recovered phosphorus solids had 20.4% phosphates (P2O5). The protein extract was concentrated using ultrafiltration (UF) and lyophilization to obtain a protein solids concentrate. UF of 5 and 10 kilodalton (kDa) captured all the proteins, but 30 kDa resulted in 22% loss. The protein solids were converted into amino-acids using acid hydrolysis. Further, the system was proved effective to extract phosphorus and proteins from other biological materials, such as algae or crops. Conclusion: The recovered proteins could be used for production of amino acids and the recovered phosphorus could be used as a recycled material that replaces commercial phosphate fertilizers. This could be a potential new revenue stream from waste products for farmers. Acknowledgement: Support by The Kaiteki Institute, Mitsubishi Chemical Holdings Group through ARS Cooperative Agreement 58-6082-5-006-F is acknowledged. References: Vanotti, M.B. and Szogi, A.A. 2016. Extraction of amino acids and phosphorus from biological materials. US Patent Application 15/350,283. US Patent & Trademark Office.