Dephenolization of stored olive-mill wastewater, using four different adsorbing matrices to attain a low-cost feedstock for hydrogen photo-production

Padovani, Giulia; Pintucci, Cristina; Carlozzi, Pietro

doi:10.1016/j.biortech.2013.03.155

Cited by 41 publications

(22 citation statements)

References 34 publications

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“…Thus, whatever the organism, the feedstock, the method and technique used, the ultimate goal is to produce H2 on a large scale at a price competitive with fossil fuels. In this regard, the cumulative hydrogen production, obtained in the present study by feeding the reactor with diluted MMeff (50%, v/v), was 23% greater than that which has previously been attained when feeding the photobioreactor with a carbon effluent diluted with water (25%, v/v) [15].…”

Section: Discussioncontrasting

confidence: 64%

“…An environmental paradox could occur: instead of cleaning up the environment, clean fresh water would be contaminated. Compared to the previous OMW pretreatment studies reported elsewhere [4,15], the prototype produced here for OMW dephenolization has the potential to reduce the amount of effluent that has to be fed to photobioreactors for bioH2 production.…”

Section: Discussionmentioning

confidence: 99%

“…The aquatic fern (Azolla) was used simply as a dried plant, without any grinding to provide for pulverization [15]. After centrifugation and acidification (pH = 4.2), 100 L of stored OMW were placed inside the mixing column with blades, and 8 kg of GAC were then added.…”

Section: Olive-mill Wastewater Pretreatmentmentioning

confidence: 99%

“…All experiments were carried out in a thermostatic room and under atmospheric pressure. The gas produced by bacterial cells was first made to flow into a basin containing a CO2-absorber (saline solution of NaOH), and hydrogen was then trapped in a calibrated column, where it was collected and the volume was measured in order to calculate the hydrogen production [15]. The calibrated column was refilled with a saline solution of NaOH every morning.…”

Section: Microorganism and Culture Operation Conditionsmentioning

confidence: 99%

“…A recent investigation demonstrated that stored OMW can be turned into a feedstock for hydrogen photo-production following PP removal (dephenolization) by means of a pretreatment process involving the use of adsorbent matrices [15]. Moreover, a bio-refinery procedure (pretreatment first and subsequent photo-fermentation) is a suitable clean-up process that can alleviate environmental problems caused by OMW.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussioncontrasting

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Olive-mill Wastewater Pretreatmentmentioning

confidence: 99%

Section: Microorganism and Culture Operation Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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Potential biovalorization techniques for olive mill biorefinery wastewater

ElMekawy

Diels

Bertin

et al. 2013

Biofuels Bioprod Bioref

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The industrial process of olive oil extraction produces huge amounts of wastes that have great negative impact on the environment, because of their high phytotoxicity against soil micro‐organisms and aquatic life. Valorization of olive mill waste water (OMWW) presents significant challenges mainly due to the high phenolic content of the wastewater which leads to high chemical oxygen demand (COD) and dark color. There is an insistent requirement for strategies to control these wastes through technologies able to minimize their negative environmental effect and to convert them to sustainable resources. Different micro‐organisms and techniques have been tested to valorize OMWW. This review, after presenting a general overview, focuses critically on the most significant recent advances in the various types of biological valorization techniques of OMWW. © 2013 Society of Chemical Industry and John Wiley & Sons, Ltd

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Fermentation brines from Spanish style green table olives processing: treatment alternatives before recycling or recovery operations

Ferrer‐Polonio

Iborra-Clar

Mendoza–Roca

et al. 2014

J of Chemical Tech & Biotech

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BACKGROUND Fermentation brine from Spanish style green table olives processing (FTOP) is characterized by very high conductivity (around 88 mS cm‐1), high values of suspended solids (near 1300 mg L‐1), chemical oxygen demand (around 17 900 mg L‐1) and total phenols (1000 mg L‐1). In this work, fermentation brines have been exhaustively characterized and pH adjustment–sedimentation, coagulation–flocculation–sedimentation and adsorption with activated carbon have been evaluated. RESULTS AND CONCLUSIONS The pretreatment selection will depend on the final FTOP management. If no polyphenols elimination is required in view of a further recovery, the best pretreatment is pH adjustment to 9 plus sedimentation. The removal efficiencies achieved were 33.1% suspended solids, 82.5% turbidity and only 10.4% of polyphenols. However, if the final FTOP treatment was biological, the best pretreatment is adsorption with powder active carbon, because this pretreatment implies the maximum reduction of phenols in FTOP, which inhibit microorganism activity in the biological process. The maximum total phenols removal efficiency was 96% with 8 g L‐1 of BM8 powder activated carbon (21% soluble COD). © 2014 Society of Chemical Industry

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Dephenolization of stored olive-mill wastewater, using four different adsorbing matrices to attain a low-cost feedstock for hydrogen photo-production

Cited by 41 publications

References 34 publications

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

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

Potential biovalorization techniques for olive mill biorefinery wastewater

Fermentation brines from Spanish style green table olives processing: treatment alternatives before recycling or recovery operations

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