| Title | Phosphorus Fraction in Hydrochar from Co-Hydrothermal Carbonization of Swine Manure and Rice Straw: An Optimization Analysis Based on Response Surface Methodology |
|---|---|
| ID_Doc | 25616 |
| Authors | Su, XH; Zhang, T; Zhao, JY; Mukherjee, S; Alotaibi, NM; Abou-Elwafa, SF; Tran, HT; Bolan, NS |
| Title | Phosphorus Fraction in Hydrochar from Co-Hydrothermal Carbonization of Swine Manure and Rice Straw: An Optimization Analysis Based on Response Surface Methodology |
| Year | 2024 |
| Published | Water, 16, 15 |
| Abstract | Livestock manure and crop residues are significant sources of phosphorus. However, the ineffectiveness of current processing technologies often leads to the suboptimal recovery of this phosphorus, causing considerable resource wastage and environmental pollution. Recently, global research has increasingly been focused on the resource recovery of organic waste materials using hydrothermal carbonization technology. This study investigated variations in phosphorus forms in the hydrochar produced from swine manure and rice straw, employing diverse hydrothermal carbonization conditions and applying the Box-Behnken response surface methodology and Hedley's phosphorus fractionation method. The results indicated that inorganic phosphorus predominates in the hydrochar, with organic phosphorus comprising 5-30% of the total phosphorus. Furthermore, the study found that the available phosphorus content, as measured by NaHCO3 extraction, decreased as the reaction time and temperature of the hydrothermal carbonization process increased. The concentrations of H2O-P and NaHCO3-P fractions decreased with increasing reaction times and temperatures but increased with a higher swine manure-to-straw ratio. Conversely, the concentrations of NaOH-P and HCl-P fractions showed an increasing trend with rising reaction temperature, prolonging reaction time, andusing a high swine manure-to-straw ratio. Consequently, this study offers vital theoretical and practical insights into the resource utilization of livestock manure and crop straw, significantly contributing to the challenges of waste management and environmental sustainability in agriculture. |
| https://www.mdpi.com/2073-4441/16/15/2208/pdf?version=1722819302 |
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