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Mycelial pellet formation by edible ascomycete filamentous fungi, Neurospora intermedia
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery (Biotechnology))ORCID iD: 0000-0001-5719-7252
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery (Biotechnology))
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery (Biotechnology))ORCID iD: 0000-0003-4887-2433
2016 (English)In: AMB Express, ISSN 2191-0855, E-ISSN 2191-0855, Vol. 6, no 31, 10.1186/s13568-016-0203-2Article in journal (Refereed) Published
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

Pellet formation of filamentous fungi in submerged culture is an imperative topic of fermentation research. In this study, we report for the first time the growth of filamentous ascomycete fungus,Neurospora intermedia in its mycelial pellet form. In submerged culture, the growth morphology of the fungus was successfully manipulated into growing as pellets by modifying various cultivation conditions. Factors such as pH (2.0–10.0), agitation rate (100–150 rpm), carbon source (glucose, arabinose, sucrose, and galactose), the presence of additive agents (glycerol and calcium chloride) and trace metals were investigated for their effect on the pellet formation. Of the various factors screened, uniform pellets were formed only at pH range 3.0–4.0, signifying it as the most influential factor for N. intermedia pellet formation. The average pellet size ranged from 2.38 ± 0.12 to 2.86 ± 0.38 mm. The pellet formation remained unaffected by the inoculum type used and its size showed an inverse correlation with the agitation rate of the culture. Efficient glucose utilization was observed with fungal pellets, as opposed to the freely suspended mycelium, proving its viability for fast- fermentation processes. Scale up of the pelletization process was also carried out in bench-scale airlift and bubble column reactors (4.5 L).

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2016. Vol. 6, no 31, 10.1186/s13568-016-0203-2
Keyword [en]
Neurospora intermedia; Ascomycete; Filamentous fungi; Edible fungi; Pellet
National Category
Bioprocess Technology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-10462DOI: 10.1186/s13568-016-0203-2OAI: oai:DiVA.org:hb-10462DiVA: diva2:951123
Funder
Swedish Energy AgencySwedish Research Council Formas
Available from: 2016-08-05 Created: 2016-08-05 Last updated: 2016-09-01Bibliographically approved

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Nair, RamkumarLennartsson, PatrikTaherzadeh, Mohammad
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