Microwave pretreatment for enhancement of phosphorus release from dairy manure.
Both the advanced oxidation process (AOP) using a combination of hydrogen peroxide addition and microwave heating (H2O2/microwave), and the microwave heating process were used for solubilization of phosphorus from liquid dairy manure. About 80% of total phosphate was released into the solution at a microwave heating time of 5 min at 170 degrees C. With an addition of H2O2, more than 81% of total phosphate could be released over a reaction period of 49 h at ambient temperature. The AOP process could achieve up to 85% of total phosphate release at 120 degrees C. The results indicated that both the microwave, and the AOP processes could effectively release phosphate from liquid dairy manure. These processes could serve as pretreatments for phosphorus recovery from animal wastes, and could be combined with the struvite crystallization process to provide a new approach in treating animal wastes.
Pan
Szu-Hua
SH
Institute for Resource, Environment and Sustainability, University of British Columbia Vancouver, British Columbia, Canada.
Lo
Kwang Victor
KV
Liao
Ping Huang
PH
Schreier
Hans
H
D000818:Animals; D002417:Cattle; D004787:Environmental Pollution / Q000032:analysis / Q000517:prevention & control; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008372:Manure / Q000032:analysis*; D008872:Microwaves; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects*; D012995:Solubility; D013464:Sulfuric Acids / Q000737:chemistry; D013997:Time Factors
D008372:Manure; D013464:Sulfuric Acids; D010758:Phosphorus; D006861:Hydrogen Peroxide; C033158:sulfuric acid