Utilization of food waste-derived volatile fatty acids for production of edible Rhizopus oligosporus fungal biomass
Journal article, 2020

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.

Edible filamentous fungal biomass

Volatile fatty acids

Food waste

Rhizopus oligosporus

Anaerobic digestion

Fed-batch cultivation

Author

Steven Wainaina

University of Borås

Afrilia Dwi Kisworini

Gadjah Mada University

Marizal Fanani

Gadjah Mada University

Rahma wikandari

Gadjah Mada University

Ria Millati

Gadjah Mada University

Claes Niklasson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Engineering Design

Mohammad Taherzadeh Esfahani

University of Borås

Bioresource Technology

0960-8524 (ISSN)

Vol. 310 123444

Subject Categories

Renewable Bioenergy Research

Bioprocess Technology

Organic Chemistry

DOI

10.1016/j.biortech.2020.123444

More information

Latest update

6/5/2020 7