Determination of aerobic biodegradation kinetics of olive oil mill wastewater

Günay, Ahmet; Çetin, Mesut

doi:10.1016/j.ibiod.2013.07.012

Cited by 19 publications

(7 citation statements)

References 29 publications

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“…In general, the high polyphenolic content (0.5–24 g/L) [5] makes OMWW difficult to biodegrade and a serious environmental and economic issue. Several methods are reported in the literature concerning the treatment and disposal of OMWW such as anaerobic digestion, aerobic fermentation, and composting, but all of them involve the loss or destruction of many functional compounds [6,7,8]. On the other hand, polyphenolic compounds, well-known for their beneficial effects on human health, due to their antioxidant, cardioprotective, anticancer, anti-inflammatory, and antimicrobial properties [9,10] are nowadays widely recognized as valuable molecules in pharmaceutical and nutraceutical fields [11], and in such a context, OMWW represents a really challenging bioresource.…”

Section: Introductionmentioning

confidence: 99%

Polyphenolic Fraction from Olive Mill Wastewater: Scale-Up and in Vitro Studies for Ophthalmic Nutraceutical Applications

et al. 2019

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The valorization of food wastes is a challenging opportunity for a green, sustainable, and competitive development of industry. Approximately 30 million m3 of olive mill wastewater (OMWW) are produced annually in the world as a by-product of the olive oil extraction process. In addition to being a serious environmental and economic issue because of their polluting load, OMWW can also represent a precious resource of high-added-value molecules such as polyphenols that show acclaimed antioxidant and anti-inflammatory activities and can find useful applications in the pharmaceutical industry. In particular, the possibility to develop novel nutraceutical ophthalmic formulations containing free radical scavengers would represent an important therapeutic opportunity for all inflammatory diseases of the ocular surface. In this work, different adsorbents were tested to selectively recover a fraction that is rich in polyphenols from OMWW. Afterward, cytotoxicity and antioxidant/anti-inflammatory activities of polyphenolic fraction were evaluated through in vitro tests. Our results showed that the fraction (0.01%) had no toxic effects and was able to protect cells against oxidant and inflammatory stimulus, reducing reactive oxygen species and TNF-α levels. Finally, a novel stable ophthalmic hydrogel containing a polyphenolic fraction (0.01%) was formulated and the technical and economic feasibility of the process at a pre-industrial level was investigated.

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Section: Introductionmentioning

confidence: 99%

Polyphenolic Fraction from Olive Mill Wastewater: Scale-Up and in Vitro Studies for Ophthalmic Nutraceutical Applications

et al. 2019

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“…This quantitative diversity results from different factors such as olive oil extraction method, the use of pesticides and fertilizers, cultivation soil, degree of ripening, olive harvesting time, duration of storage, olive variety and climatic conditions (Borja, et al, 2006). OMWW has a very complex nature characterized by a high chemical and biochemical oxygen demand (approximately 100-200g/L of COD and 15 to 135g/L of BOD) (Günay, et al, 2013).The dark color of this waste depends on the age and type of olive processed and also the technology used. It is generally composed of olive fruit's water content, soft pulp tune in emulsified oil (soft tissues from the olive pulp), and water which is used to wash the various stages of the oil extraction process (Kıpçak, et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

Hadhoum

Balistrou

Burnens

et al. 2016

Bioresource Technology

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:The main purpose of this study is to investigate the direct hydrothermal liquefaction of oil mill wastewater (OMWW). Experiments were carried out at different temperatures (240-300 _C), water contents (58-88 wt.%) and reaction times (15-45 min). Results show that the highest bio-oil yield was about 58 wt.%, resulting in a higher heating value of 38 MJ/kg. This was conducted at the following optimal conditions: water content 88 wt.%, a temperature of 280 _C, and 30 min as reaction time. To put bio-oil into wide application, the various physical and chemical characteristics were determined. A detailed chemical composition analysis of bio-oil was performed by gas chromatography-mass spectrometry (GC-MS) coupled with a flame ionization detector (FID). The dominant compounds were identified by using NIST library. Analyses show that the bio-oil contains mainly oleic acid, hexadecanoic acid, fatty acid methyl ester, fatty acid ethyl ester, amino acid derived compounds and phenolic compounds.

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“…Although biological olive oil mill wastewater treatment has been extensively studied (Chiavola et al, 2014;Günay and Çetin, 2013), there are only a few of research papers dealing with the biological treatment of TOP wastewaters, and in these papers the FTOP is often excluded: e.g. Aggelis et al (2001) reported about the biological treatment of debittering wastewaters, Maza-Márquez et al (2013) treated the olive washing effluents and Rivas et al (2000) the global wastewater excluding fermentation brines.…”

Section: Introductionmentioning

confidence: 99%

Brine recovery from hypersaline wastewaters from table olive processing by combination of biological treatment and membrane technologies

Ferrer‐Polonio

Carbonell-Alcaina

Mendoza–Roca

et al. 2017

Journal of Cleaner Production

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The fermentation brines from table olive processing (FTOP) are hypersaline effluents (conductivities higher than 75 mS•cm-1) with high organic matter concentrations (COD around 10 g•L-1), which also include phenolic compounds (between 700 and 1500 mg TY•L-1). In this work, an integrated process for the FTOP reuse as brine in the table olive processing has been evaluated. This integrated process consisted of a biological treatment followed by a membrane system, which included ultrafiltration (UF) plus nanofiltration (NF). The biological treatment was carried out by 6 L laboratory sequencing batch reactor (SBR). UF and NF were performed in laboratory plants for flat membranes of 0.0125 and 0.0072 m 2 , 2 respectively. Each stream generated during the FTOP treatment (SBR effluent, and UF and NF permeates) were evaluated. The SBR eliminated around 80% of COD and 71% of total phenols concentration. In the final NF permeate the COD concentration was lower than 125 mg•L-1 ; while the turbidity, colour and phenolic compounds, were completely removed.

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Determination of aerobic biodegradation kinetics of olive oil mill wastewater

Cited by 19 publications

References 29 publications

Polyphenolic Fraction from Olive Mill Wastewater: Scale-Up and in Vitro Studies for Ophthalmic Nutraceutical Applications

Polyphenolic Fraction from Olive Mill Wastewater: Scale-Up and in Vitro Studies for Ophthalmic Nutraceutical Applications

Hydrothermal liquefaction of oil mill wastewater for bio-oil production in subcritical conditions

Brine recovery from hypersaline wastewaters from table olive processing by combination of biological treatment and membrane technologies

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