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Bioconversion of food waste to biocompatible wet-laid fungal films
(Swedish Centre for Resource Recovery)
RISE - Research Institutes of Sweden, Bioeconomy, Materials and Surfaces, 114 28 Stockholm, Sweden.
Department of Physiology and Pharmacology, Karolinska Institute, 171 77 Stockholm, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging, 114 28 Stockholm, Sweden.
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2022 (Engelska)Ingår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 216, artikel-id 110534Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

The fungus Rhizopus delemar was grown on bread waste in a submerged cultivation process and wet-laid into films. Alkali or enzyme treatments were used to isolate the fungal cell wall. A heat treatment was also applied to deactivate biological activity of the fungus. Homogenization of fungal biomass was done by an iterative ultrafine grinding process. Finally, the biomass was cast into films by a wet-laid process. Ultrafine grinding resulted in densification of the films. Fungal films showed tensile strengths of up to 18.1 MPa, a Young's modulus of 2.3 GPa and a strain at break of 1.4%. Highest tensile strength was achieved using alkali treatment, with SEM analysis showing a dense and highly organized structure. In contrast, less organized structures were obtained using enzymatic or heat treatments. A cell viability assay and fluorescent staining confirmed the biocompatibility of the films. A promising route for food waste valorization to sustainable fungal wet-laid films was established. © 2022 The Authors

Ort, förlag, år, upplaga, sidor
Elsevier, 2022. Vol. 216, artikel-id 110534
Nyckelord [en]
Biocompatible, Filamentous fungi, Food waste, Ultrafine grinding, Wet-laid film, Zygomycetes, Bioactivity, Elastic moduli, Fungi, Grinding (machining), Heat treatment, Tensile strength, Alkali treatment, Cultivation process, Filamentous fungus, Organized structure, Rhizopus delemar, Submerged cultivation, Ultra-fine grinding, Biocompatibility
Nationell ämneskategori
Annan industriell bioteknik Biomaterial Polymerkemi
Forskningsämne
Resursåtervinning
Identifikatorer
URN: urn:nbn:se:hb:diva-27825DOI: 10.1016/j.matdes.2022.110534ISI: 000806351300008Scopus ID: 2-s2.0-85126375844OAI: oai:DiVA.org:hb-27825DiVA, id: diva2:1656115
Forskningsfinansiär
Vinnova, 2018-04093Tillgänglig från: 2022-05-04 Skapad: 2022-05-04 Senast uppdaterad: 2023-02-20

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Svensson, SofieFerreira, JorgeZamani, Akram

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