Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste

Phosphorus (P) is a finite resource and its reuse in organic fertilisers made from biowaste and manure should therefore be encouraged. The composition of solid organic fertilisers (SOFs) depends on the type of feedstock and processing conditions, and this may affect P speciation and hence P availabi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Inge C. Regelink, Caleb E. Egene, Filip M. G. Tack, Erik Meers
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	manure solid fraction of digestate compost phosphorus iron salts Agriculture S
Acceso en línea:	https://doaj.org/article/3e68a49965fc40f99008c774f03e227b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3e68a49965fc40f99008c774f03e227b
record_format	dspace
spelling	oai:doaj.org-article:3e68a49965fc40f99008c774f03e227b2021-11-25T16:07:45ZSpeciation of P in Solid Organic Fertilisers from Digestate and Biowaste10.3390/agronomy111122332073-4395https://doaj.org/article/3e68a49965fc40f99008c774f03e227b2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2233https://doaj.org/toc/2073-4395Phosphorus (P) is a finite resource and its reuse in organic fertilisers made from biowaste and manure should therefore be encouraged. The composition of solid organic fertilisers (SOFs) depends on the type of feedstock and processing conditions, and this may affect P speciation and hence P availability. Phosphorus speciation was assessed in eighteen different SOFs produced from biowaste and digestate. Available P was determined in 10 mM CaCl<sub>2</sub> extracts at a fixed pH of 5.5 and at a fixed total P concentration in the suspension. P was dominantly present as inorganic P (>80% of total P). There was a strong variation in the Fe content of the SOFs and hence in the fraction of P bound to reactive Fe/Al-oxides (P<sub>Fe</sub>). The fraction of total P soluble at pH 5.5 correlated negatively with P<sub>Fe</sub> pointing to fixation of P by metal salts added during processing, or by soil mineral particles in case garden waste was processed. Therefore, the use of iron salts in processing plants should be avoided. In addition, the presence of P in poorly soluble precipitates lowered the fraction of easily available P. Overall, this study shows that P<sub>t</sub> alone is not a good indicator for the agronomic efficiency of SOFs due to large differences in P speciation among SOFs.Inge C. RegelinkCaleb E. EgeneFilip M. G. TackErik MeersMDPI AGarticlemanuresolid fraction of digestatecompostphosphorusiron saltsAgricultureSENAgronomy, Vol 11, Iss 2233, p 2233 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	manure solid fraction of digestate compost phosphorus iron salts Agriculture S
spellingShingle	manure solid fraction of digestate compost phosphorus iron salts Agriculture S Inge C. Regelink Caleb E. Egene Filip M. G. Tack Erik Meers Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
description	Phosphorus (P) is a finite resource and its reuse in organic fertilisers made from biowaste and manure should therefore be encouraged. The composition of solid organic fertilisers (SOFs) depends on the type of feedstock and processing conditions, and this may affect P speciation and hence P availability. Phosphorus speciation was assessed in eighteen different SOFs produced from biowaste and digestate. Available P was determined in 10 mM CaCl<sub>2</sub> extracts at a fixed pH of 5.5 and at a fixed total P concentration in the suspension. P was dominantly present as inorganic P (>80% of total P). There was a strong variation in the Fe content of the SOFs and hence in the fraction of P bound to reactive Fe/Al-oxides (P<sub>Fe</sub>). The fraction of total P soluble at pH 5.5 correlated negatively with P<sub>Fe</sub> pointing to fixation of P by metal salts added during processing, or by soil mineral particles in case garden waste was processed. Therefore, the use of iron salts in processing plants should be avoided. In addition, the presence of P in poorly soluble precipitates lowered the fraction of easily available P. Overall, this study shows that P<sub>t</sub> alone is not a good indicator for the agronomic efficiency of SOFs due to large differences in P speciation among SOFs.
format	article
author	Inge C. Regelink Caleb E. Egene Filip M. G. Tack Erik Meers
author_facet	Inge C. Regelink Caleb E. Egene Filip M. G. Tack Erik Meers
author_sort	Inge C. Regelink
title	Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
title_short	Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
title_full	Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
title_fullStr	Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
title_full_unstemmed	Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste
title_sort	speciation of p in solid organic fertilisers from digestate and biowaste
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3e68a49965fc40f99008c774f03e227b
work_keys_str_mv	AT ingecregelink speciationofpinsolidorganicfertilisersfromdigestateandbiowaste AT calebeegene speciationofpinsolidorganicfertilisersfromdigestateandbiowaste AT filipmgtack speciationofpinsolidorganicfertilisersfromdigestateandbiowaste AT erikmeers speciationofpinsolidorganicfertilisersfromdigestateandbiowaste
_version_	1718413311733661696

Speciation of P in Solid Organic Fertilisers from Digestate and Biowaste

Ejemplares similares