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Publications (4 of 4) Show all publications
Gmoser, R., Sintca, C., Taherzadeh, M. J. & Lennartsson, P. R. (2019). Combining submerged and solid state fermentation to convert waste bread into protein and pigment using the edible filamentous fungus N. intermedia.. Waste Management, 97, 63-70, Article ID S0956-053X(19)30509-4.
Open this publication in new window or tab >>Combining submerged and solid state fermentation to convert waste bread into protein and pigment using the edible filamentous fungus N. intermedia.
2019 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 97, p. 63-70, article id S0956-053X(19)30509-4Article in journal (Refereed) Published
Abstract [en]

Waste streams from ethanol and bread production present inexpensive, abundant and underutilized renewable substrates that are highly available for valorisation into high-value products. A combined submerged to solid state fermentation strategy was studied using the edible filamentous fungus Neurospora intermedia to biotransform ethanol plant residues 'thin stillage' and waste bread as substrates for the production of additional ethanol, biomass and a feed product rich in pigment. The fungus was able to degrade the stillage during submerged fermentation, producing 81 kg ethanol and 65 kg fungal biomass per ton dry weight of thin stillage. Concurrently, the second solid state fermentation step increased the protein content in waste bread by 161%. Additionally, 1.2 kg pigment per ton waste bread was obtained at the best conditions (6 days solid state fermentation under light at 95% relative humidity at 35 °C with an initial substrate moisture content of 40% using washed fungal biomass to initiate fermentation). This study presents a means of increasing the value of waste bread while reducing the treatment load on thin stillage in ethanol plants.

Keywords
Carotenoids, Edible filamentous fungi, Neurospora intermedia, Solid state fermentation, Value-added products
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-22392 (URN)10.1016/j.wasman.2019.07.039 (DOI)000485213500008 ()31447028 (PubMedID)2-s2.0-85071975599 (Scopus ID)
Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-14Bibliographically approved
Gmoser, R., Ferreira, J., Taherzadeh, M. J. & Lennartsson, P. R. (2019). Post-treatment of Fungal Biomass to Enhance Pigment Production. Applied Biochemistry and Biotechnology
Open this publication in new window or tab >>Post-treatment of Fungal Biomass to Enhance Pigment Production
2019 (English)In: Applied Biochemistry and Biotechnology, ISSN 0273-2289, E-ISSN 1559-0291Article in journal (Refereed) Published
Abstract [en]

A new post-treatment method of fungal biomass after fermentation is revealed. The post-treatment strategy was utilized to produce pigments as an additional valuable metabolite. Post-treatment included incubation at 95% relative humidity where the effects of harvesting time, light, and temperature were studied. Pigment-producing edible filamentous fungus Neurospora intermedia cultivated on ethanol plant residuals produced 4 g/L ethanol and 5 g/L fungal biomass. Harvesting the pale biomass after 48 h submerged cultivation compared to 24 h or 72 h increased pigmentation in the post-treatment step with 35% and 48%, respectively. The highest pigment content produced, 1.4 mg/g dry fungal biomass, was obtained from washed biomass treated in light at 35 °C whereof the major impact on pigmentation was from washed biomass. Moreover, post-treated biomass contained 50% (w/w) crude protein. The post-treatment strategy successfully adds pigments to pre-obtained biomass. The pigmented fungal biomass can be considered for animal feed applications for domestic animals.

Keywords
Pigments, Neurospora intermedia, Carotenoids, Edible filamentous fungi, Post-treatment
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-21568 (URN)10.1007/s12010-019-02961-y (DOI)000480585200013 ()2-s2.0-85064279196 (Scopus ID)
Available from: 2019-08-06 Created: 2019-08-06 Last updated: 2020-01-29
Nair, R. B., Gmoser, R., Lennartsson, P. R. & Taherzadeh, M. J. (2018). Does the second messenger cAMP have a more complex role in controlling filamentous fungal morphology and metabolite production?. MicrobiologyOpen
Open this publication in new window or tab >>Does the second messenger cAMP have a more complex role in controlling filamentous fungal morphology and metabolite production?
2018 (English)In: MicrobiologyOpen, ISSN 2045-8827, E-ISSN 2045-8827Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Blackwell Publishing Ltd, 2018
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-14831 (URN)10.1002/mbo3.627 (DOI)000440928500015 ()2-s2.0-85045101454 (Scopus ID)20458827 (ISSN) (ISBN)
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-11-29
Lennartsson, P. R., Ferreira, J. A., Taherzadeh, M. J., Lundin, M. & Gmoser, R. (2018). Pigment Production by the Edible Filamentous Fungus Neurospora Intermedia. Fermentation, 4(11), 1-15
Open this publication in new window or tab >>Pigment Production by the Edible Filamentous Fungus Neurospora Intermedia
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2018 (English)In: Fermentation, ISSN 2311-5637, Vol. 4, no 11, p. 1-15Article in journal (Refereed) Published
Abstract [en]

The production of pigments by edible filamentous fungi is gaining attention as a result of the increased interest in natural sources with added functionality in the food, feed, cosmetic, pharmaceutical and textile industries. The filamentous fungus Neurospora intermedia, used for production of the Indonesian food “oncom”, is one potential source of pigments. The objective of the study was to evaluate the fungus’ pigment production. The joint effect from different factors (carbon and nitrogen source, ZnCl2, MgCl2 and MnCl2) on pigment production by N. intermedia is reported for the first time. The scale-up to 4.5 L bubble column bioreactors was also performed to investigate the effect of pH and aeration. Pigment production of the fungus was successfully manipulated by varying several factors. The results showed that the formation of pigments was strongly influenced by light, carbon, pH, the co-factor Zn2+ and first- to fourth-order interactions between factors. The highest pigmentation (1.19 ± 0.08 mg carotenoids/g dry weight biomass) was achieved in a bubble column reactor. This study provides important insights into pigmentation of this biotechnologically important fungus and lays a foundation for future utilizations of N. intermedia for pigment production. 

Place, publisher, year, edition, pages
Göteborg: , 2018
Keywords
pigments; neurospora intermedia; carotenoids; edible filamentous fungi; ascomycetes
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13654 (URN)10.3390/fermentation4010011 (DOI)
Available from: 2018-02-14 Created: 2018-02-14 Last updated: 2018-08-20Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0923-1097

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