Olive mills wastewater treatment by combined membrane processes

Canepa, Paolo; Marignetti, N.; Rognoni, Umberto; Calgari, S.

doi:10.1016/0043-1354(88)90160-1

Cited by 42 publications

(22 citation statements)

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“…Due to the small pore size, severe fouling of the membrane occurs, which affects performance. To achieve a better performance, the ultrafiltration process is combined with centrifugation where COD removal efficiency up to 90% has been reported (Turano et al 2002), or with advanced oxidation process (Gernjak et al 2004;Drouiche et al 2004) or with reverse osmosis where it is possible to obtain a COD reduction of about 99% (Canepa et al 1988). …”

Section: Flocculation-clarificationmentioning

confidence: 98%

Olive oil history, production and by-product management

Kapellakis

Tsagarakis

Crowther

2007

Rev Environ Sci Biotechnol

159

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In this review paper, the history of the olive tree and the development of the main olive oil extraction systems employed in the past are presented. Furthermore, the management techniques employed from antiquity until today for the treatment of olive mill wastewater (OMW), which constitutes the most important by-product of olive oil production, are addressed and compared. Reference is also made to global olive oil production, the environmental impacts of the uncontrolled disposal of OMW, and to the legal framework concerning its management in the main olive oil producing countries. Other byproducts of olive processing are also discussed.

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Section: Flocculation-clarificationmentioning

confidence: 98%

Olive oil history, production and by-product management

Kapellakis

Tsagarakis

Crowther

2007

Rev Environ Sci Biotechnol

159

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“…In the eldest publication which is treated in this study Canepa et al (1988) described a preliminary ultra-filtration of the raw wastewater to reduce the COD. The UF pilot unit was made of four multiple modules in series with three tubular membranes each for a total surface area of 2 m² and was equipped with polysulfone membranes with a nominal cut-off of 20 kDa.…”

Section: Cod Reductionmentioning

confidence: 99%

“…After the pretreatment for COD reduction Canepa et al (1988) described a combination of RO and adsorbing on porous polymers for the phenol recovery. The adsorbing step showed good retention qualities for polyphenols, but is not noted in detail at this point.…”

Section: Recovery Of Phenolic Compoundsmentioning

confidence: 99%

Overview of Membrane Processes for the Recovery of Polyphenols from Olive Mill Wastewater

K.¹

2012

American Journal of Environmental Sciences

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Problem statement: Olive Mill Wastewater (OMW) is an ambivalent by-product of the olive oil production, which appears in huge amounts every year after the olive-harvest in the production countries, mainly in the Mediterranean region. OMW is characterized by a high organic load and i.a. contains considerable amounts of phytotoxical polyphenols, which cause important environmental problems. Approach: Due to their antioxidant properties the use of these polyphenols is also popular in several industry branches, which results in high sale values for this group of chemicals. The removal of polyphenols from biological wastewaters like OMW does not only reduce the pollutant load but also shows great potential for a beneficial recovery of these antioxidants. This is the reason why a growing number of studies deal with a combined wastewater treatment, which, besides water purification, also regards the ability of recovering polyphenols. This article is an overview of reports concerning polyphenol recovery from OMW via membrane technologies. . Polyphenols such as hydroxytyrosol, protocatechuic acid, tyrosol, caffeic acid and oleuropein were found in this concentrate and make it suitable for the use in industry. Conclusion: The membrane processes in sequential design in particular show good results and offer an alternative to other OMW treatments especially in terms of polyphenol recovery.

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“…Canepa et al [21] used a resin-bed column for the inal puriication of OMW-3 previously treated by UF, and performed good regarding the retention of polyphenols, and could treat around 3000 L until saturation.…”

Section: Adsorption Processes For Olive Mill Eluent Puriicationmentioning

confidence: 99%

“…Canepa et al [21] conducted a study on OMW-3 (average COD = 90 g/L) treatment based on a combined UF membrane followed by adsorption and RO process at pilot scale. The UF membrane was made of polysulfone, the permeate was treated with adsorbing polymers, and the resins eluate with RO polypiperazine-amide membranes.…”

Section: Microiltration and Ultrailtration Membranesmentioning

confidence: 99%