Extrusion of Different Plants into Fibre for Peat Replacement in Growing Media: Adjustment of Parameters to Achieve Satisfactory Physical Fibre-Properties

dc.contributor.authorDittrich, Christian
dc.contributor.authorPecenka, Ralf
dc.contributor.authorLøes, Anne-Kristin
dc.contributor.authorCáceres, Rafaela
dc.contributor.authorConroy, Judith
dc.contributor.authorRayns, Francis
dc.contributor.authorSchmutz, Ulrich
dc.contributor.authorKir, Alev
dc.contributor.authorKruggel-Emden, Harald
dc.date.accessioned2021-07-12T07:10:33Z
dc.date.available2021-07-12T07:10:33Z
dc.date.issued2021-06-10
dc.date.updated2021-07-03T17:46:41Z
dc.description.abstractPeat is a highly contentious input in agriculture. Replacing or reducing peat by substitution with lignocellulosic biomass processed into fibre by twin-screw-extrusion could contribute to more sustainable agriculture with regard to horticultural production. Therefore, plant wastes including pruning from Olea europaea L. and Vitis spp. L., residues from perennial herbs like Salvia spp. L., Populus spp. L. and forest biomass were processed to fibre for peat replacement with a biomass extruder. The water-holding-capacity (WHC), particle-size-distribution and other physical fibre characteristics were determined and compared to peat. The specific energy demand during extrusion was measured for aperture settings from 6–40 mm. No fibre reached the 82% WHC of peat. At the setting of 20 mm of all materials investigated, Salvia performed best with a WHC of 53% and moderate specific energy demand (167 kWh tDM−1) followed by Olea europaea with a WHC of 43% and a low energy demand (93 kWh tDM−1). For Populus, opening the aperture from 20–40 mm decreased energy demand by 41% and WHC by 27%. The drying of biomass for storage and remoistening during extrusion increased the specific energy demand. Despite a lower WHC than peat, all investigated materials are suitable to replace peat in growing media regarding their physical properties.en
dc.description.sponsorshipEC/H2020/774340/EU/Pathways to phase-out contentious inputs from organic agriculture in Europe/Organic-PLUSen
dc.identifier.eissn2073-4395
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/13400
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12184
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.othertwin-screw extrusionen
dc.subject.otherfibreen
dc.subject.otheragricultural residuesen
dc.subject.otherpeat substitutionen
dc.subject.otherspecific energy demanden
dc.subject.otherwater holding capacityen
dc.titleExtrusion of Different Plants into Fibre for Peat Replacement in Growing Media: Adjustment of Parameters to Achieve Satisfactory Physical Fibre-Propertiesen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber1185en
dcterms.bibliographicCitation.doi10.3390/agronomy11061185en
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleAgronomyen
dcterms.bibliographicCitation.originalpublishernameMDPIen
dcterms.bibliographicCitation.originalpublisherplaceBaselen
dcterms.bibliographicCitation.volume11en
tub.accessrights.dnbfreeen
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Prozess- und Verfahrenstechnik::FG Mechanische Verfahrenstechnik und Aufbereitungde
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Mechanische Verfahrenstechnik und Aufbereitungde
tub.affiliation.instituteInst. Prozess- und Verfahrenstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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