Zygomycetes-based biorefinery: Present status and future prospects

Ferreira, Jorge A.; Lennartsson, Patrik R.; Edebo, L.; Taherzadeh, Mohammad J.

doi:10.1016/j.biortech.2012.09.064

Cited by 111 publications

(73 citation statements)

References 61 publications

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“…3). Lactic acid frequently occurs as an undesired metabolite produced by contaminants (Skinner and Leathers, 2004) and its uptake by other zygomycetes is documented (Ferreira et al, 2013). However, no measurable consumption of lactic acid by the Rhizopus sp.…”

Section: Steering the Uptake Of Carbon Sourcesmentioning

confidence: 99%

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Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)

et al. 2016

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Please cite this article as: FazeliNejad S., Ferreira J.A., Brandberg T., Lennartsson P.R., Taherzadeh M.J. Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF). Biofuel Research Journal 9 (2016) SSFF can be used for production of ethanol and biomass from wheat straw.Glucose present in the feed controlled the assimilation of xylose and acetic acid.The fungal growth rate was found not to be influenced by the feed composition.Rhizopus biomass yields of up 0.34 g/g and ethanol yields of 0.40 g/g were obtained. The economic viability of the 2 nd generation bioethanol production process cannot rely on a single product but on a biorefinery built around it. In this work, ethanol and fungal biomass (animal feed) were produced from acid-pretreated wheat straw slurry under an innovative simultaneous saccharification, fermentation, and filtration (SSFF) strategy. A membrane unit separated the solids from the liquid and the latter was converted to biomass or to both biomass and ethanol in the fermentation reactor containing Rhizopus sp. pellets. Biomass yields of up to 0.34 g/g based on the consumed monomeric sugars and acetic acid were achieved. A surplus of glucose in the feed resulted in ethanol production and reduced the biomass yield, whereas limiting glucose concentrations resulted in higher consumption of xylose and acetic acid. The specific growth rate, in the range of 0.013-0.015/h, did not appear to be influenced by the composition of the carbon source. Under anaerobic conditions, an ethanol yield of 0.40 g/g was obtained. The present strategy benefits from the easier separation of the biomass from the medium and the fungus ability to assimilate carbon residuals in comparison with when yeast is used. More specifically, it allows in-situ separation of insoluble solids leading to the production of pure fungal biomass as a value-added product. ARTICLE INFO ABSTRACT © 2016 BRTeam. All rights reserved.Journal homepage: www.biofueljournal.com FazeliNejad et al. / Biofuel Research Journal 9 (2016) [372][373][374][375][376][377][378] Please cite this article as: FazeliNejad S., Ferreira J.A., Brandberg T., Lennartsson P.R., Taherzadeh M.J. Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF).

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Section: Steering the Uptake Of Carbon Sourcesmentioning

confidence: 99%

“…Edible filamentous fungi have been previously used for production of protein-rich biomass (animal feed) from various types of substrates (Ferreira et al, 2013). For instance, tempe-isolated zygomycete Rhizopus sp.…”

Section: Introductionmentioning

confidence: 99%

Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)

et al. 2016

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“…R. oryzae has been used for many centuries in Asian cuisine to prepare fermented food, such as tempeh. Therefore, it is Generally Regarded As Safe (GRAS), which is a very favorable property when investigating its potential use as animal feed [18]. Due to these arguments, the possibility of using HTPL to cultivate R. oryzae is studied in this work.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic and Life Cycle Assessment of Wastewater Management from Potato Starch Production: Present Status and Alternative Biotreatments

et al. 2017

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Potato liquor, a byproduct of potato starch production, is steam-treated to produce protein isolate. The heat treated potato liquor (HTPL), containing significant amounts of organic compounds, still needs to be further treated before it is discarded. Presently, the most common strategy for HTPL management is concentrating it via evaporation before using it as a fertilizer. In this study, this scenario was compared with two biotreatments: (1) fermentation using filamentous fungus R. oryzae to produce a protein-rich biomass, and (2) anaerobic digestion of the HTPL to produce biogas. Technical, economic and environmental analyses were performed via computational simulation to determine potential benefits of the proposed scenarios to a plant discarding 19.64 ton/h of HTPL. Fungal cultivation was found to be the preferred scenario with respect to the economic aspects. This scenario needed only 46% of the investment needed for the evaporation scenario. In terms of the environmental impacts, fungal cultivation yielded the lowest impacts in the acidification, terrestrial eutrophication, freshwater eutrophication, marine eutrophication and freshwater ecotoxicity impact categories. The lowest impact in the climate change category was obtained when using the HTPL for anaerobic digestion.

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“…The discarded solids (32 % w/w DM) also contained a considerable amount of glucose, and therefore, the total recovery of sugar in the liquid was limited to 63.5 ± 1.7 %. In an integrated biorefinery approach, the solid fraction may still be used for biogas production, composting or as animal feed, especially if mix ed with the microbial biomass as a protein source 25 and dried.…”

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confidence: 99%

Valorization of Potato-processing Residues for the Production of Lactic Acid

Smerilli¹

2016

Chem.Biochem.Eng.Q.

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Every year large amounts of residues accumulate from potato processing. The aim of this study is to develop a process to valorize these residues as feedstock for lactic acid fermentation in a way that is suitable for industrial production. An enzymatic hydrolysate obtained from potato residues (46 % w/w dry mass starch) was used as a substrate in batch and fed-batch fermentations with Lactobacillus casei. Supplementation of yeast extract (3 g L ) was required to improve productivities. Despite the inhibitory effect exerted by phenolic compounds in the medium, reasonably high lactic acid concentrations (102 g L -1 ) and yields (92 %) were obtained, with 92 % (L-isomer) optical purity. It was clearly demonstrated that potato residues are suitable as feedstock for large-scale production of technical grade lactic acid and that the developed process is promising for large-scale biorefinery applications.

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Zygomycetes-based biorefinery: Present status and future prospects

Cited by 111 publications

References 61 publications

Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)

Fungal protein and ethanol from lignocelluloses using Rhizopus pellets under simultaneous saccharification, filtration and fermentation (SSFF)

Techno-Economic and Life Cycle Assessment of Wastewater Management from Potato Starch Production: Present Status and Alternative Biotreatments

Valorization of Potato-processing Residues for the Production of Lactic Acid

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