Selection of non-conventional yeasts and their use in immobilized form for the bioremediation of olive oil mill wastewaters

Bleve, Gianluca; Lezzi, Chiara; Chiriatti, Maria Assunta; D’Ostuni, I.; Tristezza, Mariana; Venere, D. Di; Sergio, L.; Mita, Giovanni; Grieco, Francesco

doi:10.1016/j.biortech.2010.09.059

Cited by 74 publications

(34 citation statements)

References 33 publications

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“…Potential biotechnological uses of Penicillia, isolated from fresh olive fruits, olive paste and pomace, were suggested by Baffi et al (2012). Analogously to the approach followed for yeasts (Bleve et al, 2011), mold isolates (as whole cells in free or immobilized forms) or enzymes purified from different mold species can be useful for treatment and/or bioconversion of agro-food by-products, such as wastewaters deriving from olive oil and table olives industry.…”

Section: Discussionmentioning

confidence: 99%

Isolation, Characterization, and Selection of Molds Associated to Fermented Black Table Olives

et al. 2017

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Table olives are one of the most important fermented food in the Mediterranean countries. Apart from lactic acid bacteria and yeasts that mainly conduct the olive fermentation, molds can develop on the brine surface, and can have either deleterious or useful effects on this process. From the food safety point of view, occurring molds could also produce mycotoxins, so, it is important to monitor and control them. In this respect, identification of molds associated to two Italian and two Greek fermented black table olives cultivars, was carried out. Sixty strains were isolated and molecularly identified as Penicillium crustosum (21), P. roqueforti (29), P. paneum (1), P. expansum (6), P. polonicum (2), P. commune (1). A group of 20 selected isolates was subjected to technological (beta-glucosidase, cellulolytic, ligninolytic, pectolytic, and xylanolytic activities; proteolytic enzymes) and safety (biogenic amines and secondary metabolites, including mycotoxins) characterization. Combining both technological (presence of desired and absence of undesired enzymatic activities) and safety aspects (no or low production of biogenic amines and regulated mycotoxins), it was possible to select six strains with biotechnological interest. These are putative candidates for future studies as autochthonous co-starters with yeasts and lactic acid bacteria for black table olive production.

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Section: Discussionmentioning

confidence: 99%

Isolation, Characterization, and Selection of Molds Associated to Fermented Black Table Olives

et al. 2017

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“…[13] The utilization of alginateimmobilized yeast Yarrowia lipolytica W29 cells in the treatment of OMW also notified the importance of substrate concentration and resulted in the degradation rate of COD above 80%. [21] Bleve et al [15] reported that alginate-immobilized Geotrichum candidum produced a COD reduction of 52.3% compared with the initial value, versus the 23.8% produced by the free cell culture.…”

Section: Effect Of Initial Tp Concentrationmentioning

confidence: 98%

“…[9] On the other hand, the technology of immobilized cells, which provides several advantages over free cells such as easier separation of the cells from medium, providing operational stability of the cells and using the cells in consequence applications, was also tested in OMW treatment. The studies that cover the use of calcium alginate, [13][14][15] polyurethane-sponge, [16] sawdust from wood [17] and loofah [18,19] as immobilization materials are in a limited number and mainly were aimed to show the usability of that material in the treatment of OMW. Although the selection of support material that is insoluble or not degraded in OMW is one of the primary factors affecting the success of the biodegradation, operational conditions by the prepared biocatalyst should also be developed.…”

Section: Introductionmentioning

confidence: 99%

Parameters and kinetics of olive mill wastewater dephenolization by immobilizedRhodotorula glutiniscells

Bozkoyunlu

Takaç

2014

Environmental Technology

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Olive mill wastewater (OMW) with total phenol (TP) concentration range of 300-1200 mg/L was treated with alginate-immobilized Rhodotorula glutinis cells in batch system. The effects of pellet properties (diameter, alginate concentration and cell loading (CL)) and operational parameters (initial TP concentration, agitation rate and reusability of pellets) on dephenolization of OMW were studied. Up to 87% dephenolization was obtained after 120 h biodegradations. The utilization number of pellets increased with the addition of calcium ions into the biodegradation medium. The overall effectiveness factors calculated for different conditions showed that diffusional limitations arising from pellet size and pellet composition could be neglected. Mass transfer limitations appeared to be more effective at high substrate concentrations and low agitation rates. The parameters of logistic model for growth kinetics of R. glutinis in OMW were estimated at different initial phenol concentrations of OMW by curve-fitting of experimental data with the model.

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“…However, the use of Rhodotorula strains in the biodegradation of OMW has appeared in the literature recently with the reports of our group [4] and of Jarboui et al [5]. Although use of free cells is common in the biodegradation of OMW, some reports are also available that use immobilized cells where calcium alginate is the most preferred immobilization material [6][7][8]. The main problem in the biodegradation is making the active cells survive at high total phenol (TP) concentrations.…”

Section: Introductionmentioning

confidence: 99%

Development of pH adjustment-based operational strategy to increase total phenol removal rate in biodegradation of olive mill wastewater by Rhodotorula glutinis

Karakaya

Bozkoyunlu

Lâleli³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TDuring the treatment of olive mill wastewater (OMW) by Rhodotorula glutinis, the pH of the medium increases in accordance with cell accumulation and biodegradation. Considering the pH of the medium as an indicator of biodegradation, an operation strategy depending on the pH adjustment of the batch medium with intermittent additions of OMW was developed. The addition of OMW into the biodegradation medium decreased the medium's pH; fresh substrate was provided to the cells and the cells were kept active for biodegradation up to a critical pH value. This approach also provided the biodegradation of high volumes of undiluted OMW. About five-and twofold enhancements in total phenol removal rate were obtained in batch biodegradation but with interval feedings being carried out by free and immobilized cells, respectively, relative to the corresponding batch-wise operations.

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Selection of non-conventional yeasts and their use in immobilized form for the bioremediation of olive oil mill wastewaters

Cited by 74 publications

References 33 publications

Isolation, Characterization, and Selection of Molds Associated to Fermented Black Table Olives

Isolation, Characterization, and Selection of Molds Associated to Fermented Black Table Olives

Parameters and kinetics of olive mill wastewater dephenolization by immobilizedRhodotorula glutiniscells

Development of pH adjustment-based operational strategy to increase total phenol removal rate in biodegradation of olive mill wastewater by Rhodotorula glutinis

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