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Fermentation 2017, 3(1), 12; doi:10.3390/fermentation3010012

Production of Edible Fungi from Potato Protein Liquor (PPL) in Airlift Bioreactor

Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden
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Academic Editor: Ronnie G. Willaert
Received: 13 February 2017 / Revised: 10 March 2017 / Accepted: 16 March 2017 / Published: 21 March 2017
(This article belongs to the Special Issue Membrane Bioreactors)
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Abstract

Potato protein liquor (PPL), a side stream from the potato starch industry, is normally used as fertilizer. However, with more than 100 g/L of sugars, 20 g/L of Kjeldahl nitrogen and Chemical Oxigen Demand (COD) of 300 g/L, it represents serious environmental challenges. The use of PPL for fungal cultivation is a promising solution to convert this waste into valuable products. In this study, PPL was characterized and used to cultivate edible zygomycete Rhizopus oryzae, which is widely used in Southeast Asian cuisine to prepare e.g., tempeh. Moreover, it can be potentially used as a protein source in animal feed worldwide. Under the best conditions, 65.47 ± 2.91 g of fungal biomass per litre of PPL was obtained in airlift bioreactors. The total Kjeldahl nitrogen content of the biomass was above 70 g/kg dry biomass. The best results showed 51% reduction of COD and 98.7% reduction in the total sugar content of PPL. View Full-Text
Keywords: airlift bioreactor; filamentous fungal biomass; fungal pellets; potato protein liquor; Rhizopus oryzae airlift bioreactor; filamentous fungal biomass; fungal pellets; potato protein liquor; Rhizopus oryzae
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Souza Filho, P.F.; Zamani, A.; Taherzadeh, M.J. Production of Edible Fungi from Potato Protein Liquor (PPL) in Airlift Bioreactor. Fermentation 2017, 3, 12.

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