Extrusion of Different Plants into Fibre for Peat Replacement in Growing Media: Adjustment of Parameters to Achieve Satisfactory Physical Fibre-Properties
Ver/Abrir
Autor/a
Dittrich, Christian
Pecenka, Ralf
Løes, Anne-Kristin
Conroy, Judith
Rayns, Francis
Schmutz, Ulrich
Kir, Alev
Kruggel-Emden, Harald
Fecha de publicación
2021-06-10ISSN
2073-4395
Resumen
Peat 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.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
619 - Veterinaria
Páginas
21
Publicado por
MDPI
Publicado en
Agronomy
Citación
Dittrich, Christian, Ralf Pecenka, Anne-Kristin Løes, Rafaela Cáceres, Judith Conroy, Francis Rayns, Ulrich Schmutz, Alev Kir, and Harald Kruggel-Emden. 2021. "Extrusion Of Different Plants Into Fibre For Peat Replacement In Growing Media: Adjustment Of Parameters To Achieve Satisfactory Physical Fibre-Properties". Agronomy 11 (6): 1185. doi:10.3390/agronomy11061185.
Número del acuerdo de la subvención
EC/H2020/774340/EU/Pathways to phase-out contentious inputs from organic agriculture in Europe/Organic-PLUS
Program
Sostenibilitat en Biosistemes
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