The recovery of polyphenols from olive mill waste using two adsorbing vegetable matrices

Ena, Alba; Pintucci, Cristina; Carlozzi, Pietro

doi:10.1016/j.jbiotec.2011.06.027

Cited by 75 publications

(30 citation statements)

References 23 publications

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“…The desorption of the phenolic compounds from 5% (w/v) AC after detoxification of the CS hydrolyzate was tested with several eluent mixtures containing alcoholic or alkaline solutions. Sodium hydroxide, water and alkaline ethanol were chosen according to previous desorption experiments [43][44][45]. Ozkaya [44] recovered 61% of the phenolic molecules adsorbed on charcoal by using 0.15 M sodium hydroxide, but the further increase of the eluent alkaline concentration did not lead to additional desorption.…”

Section: Desorption Of Phenolic Compounds From Activated Charcoal Andmentioning

confidence: 99%

Development of an Energy Biorefinery Model for Chestnut (Castanea sativa Mill.) Shells

et al. 2017

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Chestnut shells (CS) are an agronomic waste generated from the peeling process of the chestnut fruit, which contain 2.7-5.2% (w/w) phenolic compounds and approximately 36% (w/w) polysaccharides. In contrast with current shell waste burning practices, this study proposes a CS biorefinery that integrates biomass pretreatment, recovery of bioactive molecules, and bioconversion of the lignocellulosic hydrolyzate, while optimizing materials reuse. The CS delignification and saccharification produced a crude hydrolyzate with 12.9 g/L of glucose and xylose, and 682 mg/L of gallic acid equivalents. The detoxification of the crude CS hydrolyzate with 5% (w/v) activated charcoal (AC) and repeated adsorption, desorption and AC reuse enabled 70.3% (w/w) of phenolic compounds recovery, whilst simultaneously retaining the soluble sugars in the detoxified hydrolyzate. The phenols radical scavenging activity (RSA) of the first AC eluate reached 51.8 ± 1.6%, which is significantly higher than that of the crude CS hydrolyzate (21.0 ± 1.1%). The fermentation of the detoxified hydrolyzate by C. butyricum produced 10.7 ± 0.2 mM butyrate and 63.9 mL H 2 /g of CS.Based on the obtained results, the CS biorefinery integrating two energy products (H 2 and calorific power from spent CS), two bioproducts (phenolic compounds and butyrate) and one material reuse (AC reuse) constitutes a valuable upgrading approach for this yet unexploited waste biomass.

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Section: Desorption Of Phenolic Compounds From Activated Charcoal Andmentioning

confidence: 99%

Development of an Energy Biorefinery Model for Chestnut (Castanea sativa Mill.) Shells

et al. 2017

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“…When the desired temperature was reached, a known amount of adsorbents was added to each fl ask and the solutions were agitated on a rotary shaker at 200 rpm. At predefi ned time intervals (10,20,30,40, 50, 60, 80, 100 and 120 min), a constant quantity of sample (1.0 mL) was taken. The adsorbent was separated from the samples using membrane fi lters of 0.2 μm (Millipore).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…NaOH solution proved to be effi cient in recovering the adsorbed phenolics from AC by formation of sodium salt of phenols, which may facilitate desorption. Özkaya (14) and, more recently, Ena et al (20) reported that 0.15 M NaOH is required for quantitative desorption of phenols from AC. The desorbed phenolic fraction was more than 60 % when using 0.15 M NaOH eluent.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Isothermal Modelling of the Adsorption of Compounds from Olive Mill Wastewater onto Activated Carbon

Aliakbarian

Casazza

Perego

2015

Food Technol. Biotechnol.

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SummaryThe adsorption of phenolic compounds from olive oil wastewater by commercial activated carbon was studied as a function of adsorbent quantity and temperature. The sorption kinetics and the equilibrium isotherms were evaluated. Under optimum conditions (8 g of activated carbon per 100 mL), the maximum sorption capacity of activated carbon expressed as mg of caff eic acid equivalent per g of activated carbon was 35.8 at 10 °C, 35.4 at 25 °C and 36.1 at 40 °C. The pseudo-second-order model was considered as the most suitable for kinetic results, and Langmuir isotherm was chosen to bett er describe the sorption system. The results confi rmed the effi ciency of activated carbon to remove almost all phenolic compound fractions from olive mill effl uent. The preliminary results obtained will be used in future studies. The carbohydrate fraction of this upgraded residue could be employed to produce bioethanol, and adsorbed phenolic compounds can be recovered and used in diff erent industries.

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“…Batch desorption experiments for recovering PPs have already been carried out for Azolla and for GAC by our group [33]. Therefore, the dephenolization costs can be amortized and/or totally cancelled by the very high income of recovered phenols.…”

Section: Discussionmentioning

confidence: 99%

An Innovative Device to Convert Olive Mill Wastewater into a Suitable Effluent for Feeding Purple Non-Sulfur Photosynthetic Bacteria

et al. 2015

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A device (prototype) with a working volume of 200 L was used to deplete olive mill wastewater (OMW) of polyphenols. The OMW transformed into feedstock by means of the device was then used for feeding a lab-scale photobioreactor, just for testing the production of bioH2. The main novelty of this prototype consists in the combination of several adsorbent matrices and the exploitation of their synergic action. In this investigation, three matrices have been used: active carbon, Azolla and zeolite. The device was operated at an olive oil company located in the heart of the Chianti zone (Province of Florence, Italy). The efficiency of polyphenol removal obtained using the device was ≥96%. The multi-matrix effluent (MMeff) generated was then used to obtain three different culture broths containing 25%, 50% and 100% of MMeff, respectively. The diluted (with water) culture broths were suitable for hydrogen generation, with the highest hydrogen production rate (12.7 mL H2/Lculture/h) being obtained using 50% MMeff. The hydrogen yields were: 334 mL H2/L of MMeff, when feeding the photofermenter with pure effluent (100%); 1308 mL H2/L of MMeff, with the half-diluted effluent (50%, v/v); and 432 mL H2/L of MMeff, with the highest-diluted effluent (25%, v/v). OPEN ACCESSResources 2015, 4 622

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The recovery of polyphenols from olive mill waste using two adsorbing vegetable matrices

Cited by 75 publications

References 23 publications

Development of an Energy Biorefinery Model for Chestnut (Castanea sativa Mill.) Shells

Development of an Energy Biorefinery Model for Chestnut (Castanea sativa Mill.) Shells

Kinetic and Isothermal Modelling of the Adsorption of Compounds from Olive Mill Wastewater onto Activated Carbon

An Innovative Device to Convert Olive Mill Wastewater into a Suitable Effluent for Feeding Purple Non-Sulfur Photosynthetic Bacteria

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