Study of pig manure digestate pre-treatment for subsequent valorisation by struvite.
Acidification
Biofertiliser
Nutrient recovery
Organic waste
Phosphorus
Release
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
May 2021
May 2021
Historique:
received:
24
02
2020
accepted:
17
09
2020
pubmed:
4
10
2020
medline:
28
5
2021
entrez:
3
10
2020
Statut:
ppublish
Résumé
This work evaluates the release of phosphorus contained in the digestate from the anaerobic digestion of pig manure, through an acidification process. The objective of this acidification is to increase the amount of phosphorus available in the digestate liquid fraction and, subsequently, recover this element by chemical precipitation in the form of struvite or calcium phosphate. Two digestate samples (one fresh and one old) were studied and treated by adding various amounts of sulphuric acid to the different digestate fractions (raw digestate, solid fraction and liquid fraction). For the raw digestate, phosphorus releases higher than 95% were obtained for pH 4.0. In the last part of the experiment, the influence of acid pre-treatment on the reaction yield of phosphorus precipitation, in the form of struvite or calcium phosphate, was determined. Improvements in reaction yield were obtained up to 15% for struvite and 80% for calcium phosphate, increasing also in 7.5 times the amount of phosphorus available in the digestate liquid fraction, for both cases.
Identifiants
pubmed: 33010012
doi: 10.1007/s11356-020-10918-6
pii: 10.1007/s11356-020-10918-6
pmc: PMC9132833
doi:
Substances chimiques
Manure
0
Phosphorus
27YLU75U4W
Struvite
AW3EJL1462
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
24731-24743Subventions
Organisme : H2020 European Research Council
ID : Grant Agreement No 773682 (NUTRI2CYCLE project)
Commentaires et corrections
Type : ErratumIn
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