Nanofiltration of polysaccharides from Agaricus subrufescens

Camelini, Carla Maísa; Rezzadori, Kátia; Benedetti, Silvia; Proner, Mariane Carolina; Fogaça, Lara Alexandre; Azambuja, A. A.; Giachini, Admir José; Rossi, Márcio José; Petrus, José Carlos Cunha

doi:10.1007/s00253-013-5241-y

Cited by 13 publications

(10 citation statements)

References 32 publications

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“…The genus Agaricus L., the type genus of the Agaricaceae contains important edible and medicinal species (Largeteau et al 2011;Wisitrassameewong et al 2012;Camelini et al 2013;Thawthong et al 2014). Significant examples are A. subrufescens Peck and A. bisporus (J.E.…”

Section: Introductionmentioning

confidence: 99%

Edible species of Agaricus (Agaricaceae) from Xinjiang Province (Western China)

et al. 2015

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Agaricus is a genus of macrofungi containing species with high edible and medicinal values. A survey of Agaricus species carried out around the Ebinur Lake, in Xinjiang Province of China, in 2012, yielded 19 collections that exhibited a red discolouration when bruised. Morphological and phylogenetic comparison with species of five sections of Agaricus possessing the red discolouration trait showed that the specimens belonged to four species. Two species, A. sinodeliciosus sp. nov. and A. bitorquis in section Bivelares and A. desjardinii sp. nov. and A. padanus in section Nigrobrunnescentes, both sections being monophyletic. The two new species proposed are described and illustrated and all species are compared with similar taxa or previous records. Agaricus padanus is reported outside Italy for the first time. All species are edible and consumed by locals, and appear to be adapted to relatively dry, cold and sandy habitats. Like A. bitorquis, A. sinodeliciosus produces large, delicious semihypogeous basidiomata in such conditions; it is therefore a good potential candidate for domestication and industrial production.

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Section: Introductionmentioning

confidence: 99%

Edible species of Agaricus (Agaricaceae) from Xinjiang Province (Western China)

et al. 2015

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“…Furthermore, it invariably increases energy costs (Listiarini et al 2009). Camelini et al (2013b) found that resistance caused by fouling alone was responsible for less than 3.5 % of the total resistance for the polysaccharide extracts. This is a remarkable result since this is the main problem faced by nanofiltration of such materials (M€ antt€ ari et al 2000).…”

Section: Extraction and Concentrationmentioning

confidence: 98%

“…Following the studies of Silveira et al (2012), Camelini et al (2013b) developed a process to separate polysaccharides extracted from A. subrufescens grown in airlift bioreactors. The main objective of that study was to produce large volumes of fungal biomass; extract the polysaccharide contents, both from the biomass and the culture media; and employ tangential flow nanofiltration to concentrate and purify these bioactive substances.…”

Section: Extraction and Concentrationmentioning

confidence: 99%

“…All these factors impose high transport resistances throughout the membranes, and the extension that will affect the process depends on the membrane type and the type of fluid fed (Noble and Stern 1995;Mulder 2000). Camelini et al (2013b) showed that the highest resistance to the permeate flux was caused by polarization due to concentration (polarized gel layer), reaching values of 88 % for the culture media. Maximal resistance caused by the membrane reached values of 40 % for the extract from the fruiting bodies.…”

Section: Extraction and Concentrationmentioning

confidence: 99%

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Fungal Cultivation and Production of Polysaccharides

Camelini¹,

Rossi²,

Cardozo³

et al. 2014

Polysaccharides

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Many species of higher basidiomycetes have traditionally been used because of their medicinal properties. The positive effects associated to the consumption of those fungi have been mainly attributed to cell wall polysaccharides, which have important structural roles and are present throughout the entire life cycles of fungi. One of the most consumed and studied species native of the Americas is Agaricus subrufescens, a mushroom prescribed in different countries for prophylaxis and noninvasive treatment of numerous health-related disorders. Prior to the process of extraction, purification, and application of these polysaccharides, one needs to be concerned with the preservation of the specimen and production of fungal biomass. Even though basidiomata (syn. fruiting bodies, mushrooms) generally yield larger volumes of biomass when compared to the mycelium, cultivation of mycelium allows a more efficient control of the process and, therefore, is the method of choice of polysaccharide production. Mycelial biomass can be produced by solid-state fermentation (SSF) or submersed fermentation (SmF). Further separation and concentration of bioactive polysaccharides can be done by means of porous membranes, such as tangential flow nanofiltration.

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“…Major advantages of such system are its good sustainability, lower energy and material use and good productivity (Dalmau et al 2014;Larroche et al 2017). Examples are the production and recovery of functional polysaccharides (Mazzei et al 2010;Camelini et al 2013), lipase, rhamnolipid (Dhariwal thesis) peptides, gelatine and pectin (Lipnizki 2010), production of fatty acids (Chakraborty et al 2012) fructoolligosaccharides (Sanchez et al 2008), galactoglucomannan (Persson and Johnsson 2010), the enzymatic hydrolysis combined with selective ultrafiltration in processing of vegetable proteins (Dauffin et al 2001) and also other (Giorno et al 2017). Despite its obvious advantages, the process has a major drawback due to the problem of membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Structural Anomalies in Stirred Submerged Bioreactors Relevant to Immersed Membrane Use

Vlaev

Tsibranska

Dzhonova-Atanasova

et al. 2018

FSAB

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Separation of value-added food additives is often practiced by micro and ultrafiltration membranes in integrated submerged membrane bioreactors (sMBR) and the flow conditions are of major importance for their performance. The immersed membranes affect fluid circulation and may cause operational difficulties. Such malfunction termed flow structural deterioration of integrated vessels is addressed in this study, based on the effect of the (1) non-Newtonian component presence, and the (2) gas flow rate. Ranges of input parameters referring to power law non-Newtonian fluids with consistency coefficients of 0.02 to 0.1Pa.sn (flow index n<1) and gas flow rate 1 - 2vvm are studied. Computational fluid dynamics (CFD) simulation of a dual impeller bioreactor equipped with a mono-tubular membrane module and alternatively flat-blade or curved-blade impellers was carried out. 3-D “k-ε” turbulent flow model is used and 2-D contour plots are worked out to illustrate cases of restricted fluid mobility in the vicinity of membrane walls. The corresponding performance parameters, gas volume fraction and fluid surface velocity are discussed. Flow structural anomalies referring to zones at the immersed membranes of extremely low membrane surface velocity (<1mm.s-1) and velocity gradients (<10s-1) that are risky for membrane fouling are uncovered.Practical applications. Fermentation of food ingredients in stirred vessels combined with recovery of the value-added product is the target application. Examples are the production and recovery of peptides, gums’ (gelatin, pectin) concentration, production of fructoolligosaccharides, galactoglucomannan, enzymatic hydrolysis combined with selective ultrafiltration in processing of vegetable proteins, production of antioxidants. Viscous dispersions of food ingredients such as starch or xanthan and operating variables - impeller speed, rate of gassing - at various level may cause undesirable effects in the bioreactor flow uniformity leading to decrease of membrane separation efficiency. The cases engaging process fluids of high consistency such as exopolysaccharide dispersions are specific in this category. Restricted fluid mobility in the vicinity of the membrane module reduces the rate of fusion across the membrane surface and blocks up the product recovery. The resulting membrane fouling and the flow structural anomalies adhere to the problem of fouling control and to submerged membrane bioreactor applications

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Nanofiltration of polysaccharides from Agaricus subrufescens

Cited by 13 publications

References 32 publications

Edible species of Agaricus (Agaricaceae) from Xinjiang Province (Western China)

Edible species of Agaricus (Agaricaceae) from Xinjiang Province (Western China)

Fungal Cultivation and Production of Polysaccharides

Structural Anomalies in Stirred Submerged Bioreactors Relevant to Immersed Membrane Use

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