DOI: 10.1016/j.watres.2018.06.035
Scopus记录号: 2-s2.0-85049346302
论文题名: CO2-assisted phosphorus extraction from poultry litter and selective recovery of struvite and potassium struvite
作者: Shashvatt U. ; Benoit J. ; Aris H. ; Blaney L.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 143 起始页码: 19
结束页码: 27
语种: 英语
英文关键词: Animal manure
; Fertilizer
; Nutrient recovery
; Phosphorus
; Poultry litter
; Struvite
Scopus关键词: Calcium compounds
; Carbon dioxide
; Chlorine compounds
; Effluents
; Extraction
; Fertilizers
; Magnesium compounds
; Phosphorus
; Potassium
; Potassium chloride
; Recovery
; Waste management
; Agricultural setting
; Animal manure
; Nutrient recovery
; Phosphorus fertilizer
; Poultry litter
; Struvites
; Sustainable waste management
; Value added products
; Nutrients
; carbon dioxide
; phosphorus
; potassium
; struvite
; carbon dioxide
; chloride
; effluent
; extraction method
; litter
; manure
; phosphorus
; potassium
; poultry
; precipitation (chemistry)
; recycling
; struvite
; waste management
; aeration
; Article
; effluent
; extraction
; pH
; poultry
; precipitation
; priority journal
; solid
; Animalia
英文摘要: Phosphorus recovery from industrialized poultry operations is necessary to ensure sustainable waste management and resource consumption. To realize these goals, an innovative, two-stage process chemistry has been developed to extract nutrients from poultry litter and recover value-added products. Over 75% phosphorus extraction was achieved by bubbling carbon dioxide into poultry litter slurries and adding strong acid to reach pH 4.5–5.5. After separating the nutrient-deficient poultry litter solids and the nutrient-rich liquid, the extract pH was increased through aeration and strong base addition. Over 95% of the extracted phosphorus was recovered as solid precipitate at pH 8.5–9.0. High-purity struvite and potassium struvite products were selectively recovered through pH control, introduction of a calcium-complexing agent, and addition of magnesium chloride. The nitrogen-to-phosphorus-to-potassium (NPK) ratio of the recovered solids was controlled through aeration and pH adjustment. Precipitation at pH 8.5–9.0 and 10.5–11.0 resulted in NPK ratios of 2.0:1.0:0.1 and 0.9:1.0:0.2, respectively. The process effluent was effectively recycled as makeup water for the subsequent batch of poultry litter, thereby decreasing water consumption and increasing overall nutrient recovery. Sequencing batch operation yielded greater than 70% phosphorus recovery within a 45-min process, demonstrating the potential for this technology to alleviate nutrient pollution in agricultural settings and generate an alternative supply of phosphorus fertilizers. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112553
Appears in Collections: 气候减缓与适应
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作者单位: University of Maryland Baltimore County, Department of Chemical, Biochemical, and Environmental Engineering, 1000 Hilltop Circle, Engineering 314, Baltimore, MD 21250, United States
Recommended Citation:
Shashvatt U.,Benoit J.,Aris H.,et al. CO2-assisted phosphorus extraction from poultry litter and selective recovery of struvite and potassium struvite[J]. Water Research,2018-01-01,143