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Utilization of food waste-derived volatile fatty acids for production of edible Rhizopus oligosporus fungal biomass
University of Borås, Faculty of Textiles, Engineering and Business.
Universitas Gadjah Mada.
Universitas Gadjah Mada.
Universitas Gadjah Mada.
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2020 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976Article in journal (Refereed) Published
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]

Rhizopus oligosporus is an edible filamentous fungus that can contribute to meet the growing demand for single-cell protein. Volatile fatty acids (VFAs) are favorable potential substrates for producing R. oligosporus biomass due to their capacity to be synthesized from a wide range of low-value organic solid wastes via anaerobic digestion. The goal of this work was to cultivate R. oligosporus using food waste-derived VFAs as the sole carbon source. To maintain the requisite low substrate concentrations, the fed-batch cultivation technique was applied. This resulted in a four-fold improvement in biomass production relative to standard batch cultivation. Maximum biomass yield of 0.21 ± 0.01 g dry biomass/g VFAs COD eq. consumed, containing 39.28 ± 1.54% crude protein, was obtained. In the bubble-column bioreactors, the complete uptake of acetic acid was observed, while the consumptions of caproic and butyric acids reached up to 97.64% and 26.13%, respectively.

Place, publisher, year, edition, pages
2020.
Keywords [en]
Food waste; Anaerobic digestion; Volatile fatty acids; Fed-batch cultivation; Edible filamentous fungal biomass; Rhizopus oligosporus
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-23158DOI: 10.1016/j.biortech.2020.123444Scopus ID: 2-s2.0-85083785704OAI: oai:DiVA.org:hb-23158DiVA, id: diva2:1426878
Funder
Swedish Agency for Economic and Regional GrowthAvailable from: 2020-04-28 Created: 2020-04-28 Last updated: 2020-05-04Bibliographically approved

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Wainaina, StevenTaherzadeh, Mohammad J

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