Organic matter transformation and detoxification in dry olive mill residue by the saprophytic fungus Paecilomyces farinosus

Sampedro, Inmaculada; Cajthaml, Tomáš; Marinari, Sara; Petruccioli, Maurizio; Grégo, S.; D’Annibale, Alessandro

doi:10.1016/j.procbio.2008.10.016

Cited by 37 publications

(18 citation statements)

References 42 publications

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“…TMAH-Py-GC MS analyses were performed as previously described (Sampedro et al 2009). Briefly, 1 mg samples of ground litter were treated with an excess of tetramethylammonium hydroxide (25% aqueous solution), placed on Wolfram wire spirals, and then dried in a desiccator overnight at room temperature.…”

Section: Experiments and Data Collectionmentioning

confidence: 99%

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

2011

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The common grass Calamagrostis epigeions produces a large amount of dead biomass, which remain above the soil surface for many months. In this study, we determined how exposure of dead biomass above the soil affects its subsequent decomposition in soil. Collected dead standing biomass was divided in two parts, the first one (initial litter) was stored in a dark, dry place. The other part was placed in litterbags in the field. The litterbags were located in soil, on the soil surface, or hanging in the air without contact with soil but exposed to the sun and rain. After 1 year of field exposure, litter mass loss and C and N content were measured, and changes in litter chemistry were explored using NMR and thermochemolysis-GC-MS. The potential decomposability of the litter was quantified by burying the litter from the litterbags and the initial litter in soil microcosms and measuring soil respiration. Soil respiration was greater with litter that had been hanging in air than with all other kinds of litter. These finding could not be explained by changes in litter mass or C:N ratio. NMR indicated a decrease in polysaccharides relative to lignin in litter that was buried in soil but not in litter that was placed on soil surface or that was hanging in the air. Thermochemolysis indicated that the syringyl units of the litter lignin were decomposed when the litter was exposed to light. We postulate that photochemical decay of lignin increase decomposability of dead standing biomass.

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Section: Experiments and Data Collectionmentioning

confidence: 99%

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

2011

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“…This overall response was similar to those observed during the cultivation on composted substrates (Adams and Frostick 2008;González Matute 2009). The loss of the substrate OM during mushroom production is due to mineralization of the substrate, which is directly related to catabolic activities (Sampedro et al 2009). …”

Section: Cultivation Trialmentioning

confidence: 99%

“…During mushroom cultivation, the carbon source in substrate medium is consumed, transformed and partly liberated as CO 2 or energy, while a fraction of the nitrogen source in the substrate medium is absorbed and assimilated by the mushroom and hence transformed. Together with the residual N in the substrate this makes the total N increase, hence decreasing the substrate C/N relationship (Sampedro et al 2009). This was also true for all the NCS evaluated at the end of two flushes.…”

Section: Cultivation Trialmentioning

confidence: 99%

Agaricus blazei production on non-composted substrates based on sunflower seed hulls and spent oyster mushroom substrate

Matute¹,

Figlas²,

Curvetto³

2010

World J Microbiol Biotechnol

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Agaricus blazei Murrill is usually cultivated using the same biphasic composting method employed for A. bisporus. Because cultivation of A. blazei on traditional A. bisporus composts poses some disadvantages, non-composted substrates were studied for A. blazei cultivation. Mycelial growth rate and productive performance of A. blazei were evaluated on substrates containing sunflower seed hulls, Pleurotus spp. spent mushroom substrate, or their combination, in the absence or in the presence of different supplements (vermicompost, peat or brewery residues). Substrates were prepared by initially soaking them and then they were sterilized (1 atm for 120 min). In addition, each substrate's degradation was measured after cultivation by obtaining the lignin, cellulose, hemicellulose, organic matter, total fiber, ash, carbon and nitrogen contents before spawn-run and at the end of two flushes of A. blazei. The cultivation of A. blazei on non-composted substrates is possible and with a low rate of contamination when using the spent mushroom substrate as the main component or combined 50:50 with sunflower seed hulls. In addition, the best yields were obtained on those substrates containing spent Pleurotus mushroom substrate with supplements and those mixtures with sunflower seed hulls and vermicompost. These yields were similar to those reported on composted substrates. Substrate changes in composition measured at the end of two flushes indicate that the lignin-hemicellulose fraction was preferentially used and that the substrates exhibiting the best yield showed greater biodegradation of lignin-hemicellulose fraction than the others did.

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“…The production of tannase increased with the initial concentration of the tannic acid as substrate: maximal enzyme activities attaining 0.6, 0.9 and 1.5 EU/ml in the culture medium containing, respectively, 0.2%, 0.5% and 1% tannic acid. This suggests that the concentration of theinducing fraction derived from tannic acid (possibly gallic acid or a derivative) increased according the initial concentration of the substrate [8]. These results suggest that tannins and phenolic compounds present in OMW induce the production of tannase.…”

Section: Biodegradation Of Omw With Aspergillus Niger Van Tieghemmentioning

confidence: 85%

“…Biodegradation is versatile, inexpensive, and can potentially turn a toxic material into harmless end-products. Because toxicity has been directly linked to the phenolic fraction, higher fungi such as Yarrowia lipolytica [7] and Paecilomyces farinosus [8] have been proposed to detoxify and de-colorize the OMW. However, most of previous studies regarding the screening of fungi for biotechnological purposes have focused on species or strains deposited in culture collections [9].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: <i>Aspergillus niger</i> van Tieghem

Hanafi¹,

Mountadar²,

Etahiri³

et al. 2013

JWARP

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Thirty-two strains isolated from olive oil production plants were screened for their tolerance to the polyphenols and their ability to grow in olive oil mill wastewaters (OMW). An Ascomycete isolate that grew best on OMW was selected for further study to evaluate its effect on removal of organic pollutants, phenolic compounds and OMW toxicity. This strain was identified by DSMZ as Aspergillus niger van Tieghem. The growth of Aspergillus niger van Tieghem on stored OMW decreased pH and led to the reduction of phenolic compounds with a resultant discoloration of OMW and significant reduction of chemical oxygen demand (COD), in proportion to the dilution of OMW. The reduction of the COD, phenolics and color exceeded 50%. Tannase, the enzyme detected in the growth medium of Aspergillus niger van Tieghem was produced during primary metabolic growth. The maximal enzyme activity attaining 0.68 EU/ml was achieved in 3rd days of cultivation. The phytotoxicity of the stored OMW was reduced to about 40% after 4 days' incubation with Aspergillus niger van Tieghem.

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Organic matter transformation and detoxification in dry olive mill residue by the saprophytic fungus Paecilomyces farinosus

Cited by 37 publications

References 42 publications

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

Agaricus blazei production on non-composted substrates based on sunflower seed hulls and spent oyster mushroom substrate

Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: <i>Aspergillus niger</i> van Tieghem

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Organic matter transformation and detoxification in dry olive mill residue by the saprophytic fungus Paecilomyces farinosus

Cited by 37 publications

References 42 publications

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

The effect of lignin photodegradation on decomposability of Calamagrostis epigeios grass litter

Agaricus blazei production on non-composted substrates based on sunflower seed hulls and spent oyster mushroom substrate

Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: &lt;i&gt;Aspergillus niger&lt;/i&gt; van Tieghem

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Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: <i>Aspergillus niger</i> van Tieghem