Inhibitor Tolerance: A Comparison between Rhizopus sp. and Saccharomyces cerevisiae

Fazelinejad, Somayeh; Brandberg, Tomas; Lennartsson, Patrik R.; Taherzadeh, Mohammad J.

doi:10.15376/biores.8.4.5524-5535

Cited by 4 publications

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“…Considering a previous study (FazeliNejad et al, 2013), these levels should not be very inhibiting by themselves. It is worth quoting that hydrolysates of lignocellulosic material usually contain other inhibitors as well, such as phenolic compounds, whose concentrations were not measured in the present study.…”

Section: Impact Of Inhibitorsmentioning

confidence: 82%

“…The measurements of glucose, metabolites, and inhibitors concentrations as well as spore counting were performed according to FazeliNejad et al (2013). The SS was determined by filtration with Munktell filters, Grade 3 (5-8 µm) while the TS were determined by drying the samples to a constant weight at 105 °C overnight.…”

Section: Methodsmentioning

confidence: 99%

“…The strain was identified as RM4 in a previous publication (Wikandari et al, 2012). The fungus was kept in Potato Dextrose Agar (PDA) plates and its incubation and preparation for inoculation were carried out according to FazeliNejad et al (2013). A strain of S. cerevisiae, Ethanol Red, kindly provided by Fermentis (France) in dry form was also used.…”

Section: Microorganismsmentioning

confidence: 99%

“…For instance, tempe-isolated zygomycete Rhizopus sp. has been found to cope with inhibitors contained in lignocellulosic hydrolysates (FazeliNejad et al, 2013). Moreover, these microorganisms form pellets, and therefore, could be easily separated from the medium (Nyman et al, 2013).…”

Section: Introductionmentioning

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: Impact Of Inhibitorsmentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Section: Microorganismsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…This diversity can be found in available reviews [3,14,15,18]. In addition to their diversified enzyme network, filamentous fungi are capable of consuming both pentose and hexose sugars and demonstrate high inhibitor resistance, of particular interest for valorization of lignocellulosic materials [74][75][76].…”

Section: Filamentous Fungi In the Valorization Of "Ordinary" Sidestreamsmentioning

confidence: 99%

A Critical Review on the Ubiquitous Role of Filamentous Fungi in Pollution Mitigation

2020

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Propose of Review Anthropogenic activities are saturating wastewater treatment plants and the environment with an increasing range of organic and inorganic compounds, impairing ecosystems and health. Filamentous fungi, with characteristic filamentous growth, array of extracellular and intracellular enzymes, production of surfactants, cell wall biosorption properties, and symbiotic momentum, can contribute to a paradigm shift on the perception of anthropogenic pollution. This review provides a critical analysis of the main bottlenecks for feasible filamentous fungus-including processes and proposes a holistic approach for pollution mitigation using filamentous fungi. Recent Findings Filamentous fungi can convert ordinary sidestreams into, e.g., feed proteins and biofuels. Economic and environmental studies support integration in established processes. Intersectoral initiatives, and economic and environmental studies, need to be motivated to increase the range of processes. Although massively studied, the transfer of fungal processes for the removal of micropollutants into real matrices is difficult. It needs to be supported by omics technologies for the study of microbial networks, and by efficient analytical techniques to clarify detoxification potential. The area can benefit from knowledge integration from fungal growth in ordinary sidestreams, and from economic and environmental studies. Summary The interest in filamentous fungi for pollution mitigation is corroborated by an overwhelming amount of research; however, no full-scale applications are currently known. Environmental pollution is a reality and production of ordinary sidestreams and micropollutant-rich wastewaters continuous. The establishment of filamentous fungal processes needs collaboration among governmental authorities, industries, and academics in order to tackle knowledge gaps within the area and propose a holistic approach.

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Progress and perspective of biosynthetic platform for higher-order biofuels

Lin

Tan

2017

Renewable and Sustainable Energy Reviews

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Inhibitor Tolerance: A Comparison between Rhizopus sp. and Saccharomyces cerevisiae

Cited by 4 publications

References 0 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)

A Critical Review on the Ubiquitous Role of Filamentous Fungi in Pollution Mitigation

Progress and perspective of biosynthetic platform for higher-order biofuels

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