The determination of fertiliser quality of the formed struvite from a WWTP
Autor/a
González, C.
Fernández, B.
Molina, F.
Camargo-Valero, M. A.
Peláez, C.
Fecha de publicación
2021-04-27ISSN
0273-1223
Resumen
Struvite from nutrient-rich wastewaters has been identified as a potential substitute for commercial mineral fertilisers, with the added benefit of reducing threats to global food security by prolonging phosphate rock reserves. A fertilisation test using grass (Brachiaria brizantha Marandú) and a sand column leaching test was conducted to determine the agronomic effectiveness of struvite precipitates produced from the supernatant of dewatered sewage sludge (centrate) from a municipal Wastewater Treatment Plant (WWTP). The performance of this struvite as a fertiliser was compared with biosolids and commercial fertilisers (Urea and Triple15). The results show that the concentration of heavy metals in struvite was lower than in biosolids and below the limits of Colombia and European fertiliser regulations. Struvite increased the uptake of N and P in grass, resulting in crop yields similar to other treatments tested. Struvite use as an effective slow-release fertiliser is highly dependent on the size of crystal particles, particularly in achieving low P losses, but resulted in high N loss in the sand columns tested; N loses from struvite were higher than in the commercial fertilisers due to the struvite small particle size. Therefore, struvite represents a suitable opportunity to recover and recycle nutrients from municipal sewage sludge, facilitating the effective reuse of P and N in agriculture and uptake by plants.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
636 - Explotación y cría de animales. Cría del ganado y de animales domésticos
Páginas
13
Publicado por
IWA Publishing
Publicado en
Water Science and Technology
Citación
González, C., B. Fernández, F. Molina, M. A. Camargo-Valero, and C. Peláez. 2021. "The Determination Of Fertiliser Quality Of The Formed Struvite From A WWTP". Water Science And Technology 83 (12): 3041-3053. doi:10.2166/wst.2021.162.
Número del acuerdo de la subvención
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2015-00093-00-00/ES/Integración de procesos para la oxidación sintrófica del acetato y autotrófica del amonio en el tratamiento anaeróbico de residuos orgánicos ricos en nitrógeno para su valorización energètica/PIONER
Program
Sostenibilitat en Biosistemes
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