Efecto de la velocidad de agitación en la formación de estruvita usando el centrado de una PTAR
| Autor: | Carolina González Morales, B. Fernández, Miller Alonso Camargo-Valero, Francisco J. Pérez |
|---|---|
| Přispěvatelé: | Universidad de Antioquia |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope Struvite agrovoc:c_35332 0208 environmental biotechnology Analytical chemistry phosphorus recovery Velocity gradient 02 engineering and technology 010501 environmental sciences cristalización de estruvita 01 natural sciences lcsh:Technology struvite crystallization Cristalización de estruvita law.invention chemistry.chemical_compound vocabularies.unesco.org/thesaurus/concept1882 [http] law velocity gradient (g) Sustainable development Gradiente de velocidad Agua residual Crystallization gradiente de velocidad (g) agua residual desarrollo sostenible 0105 earth and related environmental sciences Desarrollo sostenible recuperación de fósforo lcsh:T General Engineering Phosphorus 020801 environmental engineering Estruvita Waste water sustainable development chemistry Wastewater lcsh:TA1-2040 Digestate Fósforo Sewage treatment Particle size agrovoc:c_5804 lcsh:Engineering (General). Civil engineering (General) Recuperación de fósforo |
| Zdroj: | Repositorio UdeA Universidad de Antioquia instacron:Universidad de Antioquia Revista Facultad de Ingeniería Universidad de Antioquia, Issue: 92, Pages: 42-50, Published: SEP 2019 Revista Facultad de Ingeniería, Iss 92, Pp 42-50 (2019) |
| Popis: | The formation of struvite (MgNH4PO4·6H2O) for nutrient recovery in wastewater treatment plants has been widely investigated; however, little attention has been paid to the effect of stirring speeds on the resulting particle size, which could affect its agronomic value as a slow-release fertilizer. In this study, struvite formation from the centrate of sewage digestate was performed under six stirring speeds (0, 100, 200, 300, 400, 500 rpm). The resulting struvite crystals were characterised using X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy. The average particle size of struvite crystals increased from 55 µm at 0 rpm to 127 µm at 100 rpm and 128 µm at 200 rpm. Further increments in stirring speeds resulted in smaller crystal sizes. These results indicated that the largest particle size can be obtained at stirring speeds ranging from 100 to 200 rpm, equivalent to a velocity gradient between 79 and 188 s-1, as there was no statistically significant difference between mean values (t-test, p |
| Databáze: | OpenAIRE |
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