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dc.contributor.authorBrod, Eva
dc.contributor.authorØgaard, Anne Falk
dc.date.accessioned2021-10-14T11:43:43Z
dc.date.available2021-10-14T11:43:43Z
dc.date.created2021-09-10T10:46:40Z
dc.date.issued2021-09-09
dc.identifier.citationWaste Management. 2021, 135 190-198.en_US
dc.identifier.issn0956-053X
dc.identifier.urihttps://hdl.handle.net/11250/2823018
dc.description.abstractThe aim of this study was to contribute to closing global phosphorus (P) cycles by investigating and explaining the effect of fish sludge (feed residues and faeces of farmed fish) and manure solids as P fertiliser. Phosphorus quality in 14 filtered and/or dried, composted, separated or pyrolysed products based on fish sludge or cattle or swine manure was studied by sequential chemical fractionation and in two two-year growth trials, a pot experiment with barley (Hordeum vulgare) and a field experiment with spring wheat (Triticum aestivum). In fish sludge, P was mainly solubilised in the HCl fraction (66 ± 10%), commonly being associated with slowly soluble calcium phosphates, and mean relative agronomic efficiency (RAE) of fish sludge products during the first year of the pot experiment was only 47 ± 24%. Low immediate P availability was not compensated for during the second year. Thus efforts are needed to optimise the P effects if fish sludge is to be transformed from a waste into a valuable fertiliser. In manure solids, P was mainly soluble in H2O and 0.5 M NaHCO3 (72 ± 14%), commonly being associated with plant-available P, and mean RAE during the first year of the pot experiment was 77 ± 19%. Biochars based on fish sludge or manure had low concentrations of soluble P and low P fertilisation effects, confirming that treatment processes other than pyrolysis should be chosen for P-rich waste resources to allow efficient P recycling. The field experiment supported the results of the pot experiment, but provided little additional information.en_US
dc.language.isoengen_US
dc.publisherElsevier Ltd.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleClosing global P cycles: The effect of dewatered fish sludge and manure solids as P fertiliseren_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2021 The Authorsen_US
dc.source.pagenumber190-198en_US
dc.source.volume135en_US
dc.source.journalWaste Managementen_US
dc.identifier.doi10.1016/j.wasman.2021.08.041
dc.identifier.cristin1933127
dc.relation.projectNorges forskningsråd: 194051en_US
dc.relation.projectNorges forskningsråd: 268338en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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