Relationship between cultivation mode of white rot fungi and their efficiency for olive oil mill wastewaters treatment

Alaoui, Sanae Mdaghri; Merzouki, Mohammed; Penninckx, Michel; Benlemlih, Mohammed

doi:10.2225/vol11/issue4-fulltext-15

Cited by 8 publications

(3 citation statements)

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“…Finally, fungal immobilization has been a very well established technique for culturing different fungi in submerged culture, which enhances fungal metabolites yields; like the enzymes laccases with Coriolopsis polyzona (Pers.) with Ryvarden (Alaoui et al, 2008); the antibiotic peniciline with Penicillium (Weber et al 2012), and gluco-amylases with Aspergillus sp. (Papagianni et al, 2002).…”

Section: Eritadenine (Mg/l)mentioning

confidence: 99%

“…For example, nitrogen and carbon sources influence positively the production of the antioxidant ergothioneine in shiitake (Tepwong et al, 2012a;, as well as the production of the anticancer alkaloid chaetominine with Aspergillus fumigatus (Zhang et al, 2016). Additionally, fungal immobilization have improved activity and production of laccase enzyme by Trametes versicolor and Coriolopsis polyzona cultures (Alaoui et al, 2008;Ünal and Kolankaya, 2013;Noreen et al, 2016); have enhanced penicillin production with Penicillium (Weber et al, 2012), and gluco-amylases used in food industry by Aspergillus cultures (Papagianni et al, 2002). Furthermore, the addition of surfactants has promoted higher yields of terpenes in Saccharomyces sp.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of eritadenine production using three carbon sources, immobilization and surfactants in submerged culture with shiitake mushroom (Lentinula edodes) (Berk.) Singer)

DurÃ¡n-Rivera¹,

Moreno-SuÃ¡rez²,

Rodas³

et al. 2018

Afr. J. Food Sci.

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In this study, the effect of three carbon sources (mannitol, minced potato and sucrose), two immobilization substrates (alginate and wood cylinders), and three surfactants (Tween 20, Tween 40 and Tween 80), were evaluated on eritadenine production using shiitake (Lentinula edodes) mycelium under submerged cultivation, in shake flasks within 20 days. Eritadenine and biomass were measured by HPLC and gravimetrically, respectively. Alginate immobilization of mycelium promoted significant enhancement of eritadenine yields of 88 mg/L, compared to the control (8.7 mg/L) and wood immobilization (14.8 mg/L). Likewise, eritadenine yields (72.4 mg/L) were enhanced by adding surfactant tween 20 to the broths in 0.5%, than control (8.7 mg/L) without surfactant. Tween 40 and 80 did not improve eritadenine yields, but both produced better biomass values (superior to 5 g/L) than the control (3.9 g/L). All carbon sources (sucrose, mannitol, mince potato, and glucose as control) produced similar low eritadenine yields, with best results (10.2 mg/L) by sucrose, although glucose produced the best biomass yields of 3.9 g/L. Also, carbon sources and the best biomass values did not show significant effect on eritadenine production. pH values in the best eritadenine yielding fermentations went down from 6 to 3-4, but pH had a low correlation with eritadenine yields. Finally, all data obtained in the present study are useful for optimizing culture conditions, towards industrialization of this important health improver metabolite (eritadenine).

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Section: Eritadenine (Mg/l)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of eritadenine production using three carbon sources, immobilization and surfactants in submerged culture with shiitake mushroom (Lentinula edodes) (Berk.) Singer)

DurÃ¡n-Rivera¹,

Moreno-SuÃ¡rez²,

Rodas³

et al. 2018

Afr. J. Food Sci.

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“…Many white-rot fungi grow well and perform the desired metabolism under solid-state conditions. For example, species of the genera Trametes, Phanerochaete, and Pycnoporus preferentially removed color and chemical oxygen demand from olive mill wastewaters and pulp mill black liquors under SSF cultivation conditions [61,76,77]. SSF using white-rot fungi has also been used to modify the lignin in agricultural residues, such as wheat straw, for biofuels processes [78].…”

Section: Species and Systems Investigatedmentioning

confidence: 99%

Yeast Biotechnology: Teaching the Old Dog New Tricks

2015

New Microbial Technologies for Advanced Biofuels

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/55088 . IntroductionMuch of Earth s recent geologic history is dominated by periods of extensive glaciation, with relatively low global mean temperatures and correspondingly low atmospheric CO concentrations [ ]. The current interglacial period stands out as an anomaly because the atmospheric CO concentration has risen sharply above the range of approximately -parts per million by volume that has defined the past , years to reach levels that are nearly % higher than the biosphere has experienced over this time frame [ ]. This rapid increase in CO concentration is primarily due to the release of ancient fixed atmospheric CO into the modern atmosphere through the combustion of fossil fuel resources over the past years. Since it is clear from ice core records that atmospheric CO concentration has a strong positive correlation to global temperature, it is expected that changes to global climate are forthcoming [ ]. There are substantial uncertainties regarding the ability of terrestrial and oceanic carbon sinks to absorb this anthropogenic CO on time scales that are relevant to human society [ ], so the continued release of ancient CO into the modern atmosphere at current rates carries with it an important risk of inducing climate changes of unknown amplitude along with a host of ancillary changes that are difficult to predict with certainty. This has led to the search for alternatives to fossil fuels to meet a rising global energy demand, and one such option is the use of extant organic matter to produce energy. This resource contains carbon that was fixed from the modern atmosphere, which means it does not result in a net increase in atmospheric CO upon combustion.

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Impact and prospective of fungal pre‐treatment of lignocellulosic biomass for enzymatic hydrolysis

Tian¹,

Fang²,

Guo³

2012

Biofuels Bioprod Bioref

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The presence of lignin in lignocellulosic biomass leads to a protective barrier which prevents enzymes from being accessible to cellulose and hemicellulose for hydrolysis. As a result, pre‐treatment is a ‘must’ step for subsequent enzymatic hydrolysis. Bio pre‐treatment is normally conducted at low temperatures and low pressures without using expensive equipment, chemical agents, reactors, and additional energy for lignin removal and biomass structure destruction. Therefore, it is a green, safe, and inexpensive method. White‐rot fungi (WRF), a group of fungi (more than 1500 different species) are successfully applied in bioconversion processes such as sewage treatment, biopulping, conversion of forest and agricultural residues to animal feeds, and the production of edible or medicinal mushrooms. In the bio pre‐treatment process, WRF are mostly used for secreting ligninolytic enzymes, a variety of donor substrates and selective degradation of lignin. Current research related to WRF bio pre‐treatment is mainly focusing on the following four aspects: (i) selection of candidate strains for certain biomass materials; (ii) optimization of cultivation methods; (iii) characterization of fungal treated materials; and (iv) evaluation of combining bio pre‐treatment with chemical or physicochemical approaches. Future prospects and recommended research work on applying WRF in bio pre‐treatment are also briefly introduced and summarized in this review. These include (i) integrated methods (i.e. co‐treatment with organic solvents, diluted acids, supercritical CO2 and ionic liquids) to resolve problems existing in fungal pre‐treatment applications; (ii) mutation breeding and crossbreeding of fungal mycelia to obtain engineering strains; and (iii) integration of fungal pre‐treatment with simultaneous saccharification and fermentation to produce biofuels and value‐added products. © 2012 Society of Chemical Industry and John Wiley & Sons, Ltd

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Relationship between cultivation mode of white rot fungi and their efficiency for olive oil mill wastewaters treatment

Abstract: Financial support:The authors wish to thank the "Walloon region of Belgium" and the "Association des Universités Francophones" for their financial support.Keywords: biotreatment, cell immobilization, olive oil mill wastewaters, white rot fungi. Abbreviations:COD

Cited by 8 publications

References 3 publications

Enhancement of eritadenine production using three carbon sources, immobilization and surfactants in submerged culture with shiitake mushroom (Lentinula edodes) (Berk.) Singer)

Enhancement of eritadenine production using three carbon sources, immobilization and surfactants in submerged culture with shiitake mushroom (Lentinula edodes) (Berk.) Singer)

Yeast Biotechnology: Teaching the Old Dog New Tricks

Impact and prospective of fungal pre‐treatment of lignocellulosic biomass for enzymatic hydrolysis

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