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A performance comparison of olive oil mill wastewater enzymatic treatments

Paper ID Volume ID Publish Year Pages File Format Full-Text
18811 43033 2016 11 PDF Available
Title
A performance comparison of olive oil mill wastewater enzymatic treatments
Abstract

•Fungal enzyme activities exert a synergetic effect to release hydroxytyrosol.•β-Glucosidase was revealed as the main enzyme affecting hydroxytyrosol release.•The release kinetic of hydroxytyrosol and reducing carbohydrate were quantified.•A satisfactory approach was developed to assess enzymatic treatment of OMW.

Aspergillus niger enzyme preparation, locally produced, and six commercial fungal enzyme preparations were assessed for olive oil mill wastewater (OOMW) hydrolytic treatment. The processes performances were evaluated in terms of hydroxytyrosol (HT) and reducing carbohydrates (RC) release yields, and enzyme productivities. Enzymatic hydrolysis of OOMW of the tested enzyme preparations had shown an increase of HT and RC release yields. These ranged between 0.42 and 0.87% (g HT produced/100 g dry matter), and between 3.06 and 9.7% (g RC/100 g dry matter), respectively. The kinetic parameters (maximal release rate and half-saturation constant) determined by an alternative approach to the classical Michaelis-Menten model has shown that produced enzyme preparation had an initial release rate of 0.02 g HT/L min, which is comparable to rates obtained in the presence of Viscozyme L, Novarom Blanc and Peclyve Lif Plus. The antioxidant activity of the ethyl acetate extract of OOMW, measured by the DPPH method, was drastically enhanced after the different enzymatic treatments. This study demonstrates that enzymatic treatment is a potential method for the valorization of OOMW in order to produce valuable compounds with promising applications in the food industry.

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Keywords
Olive oil mill wastewater; Hydroxytyrosol; Reducing carbohydrates; Fungal enzymes; Release rate; Michaelis-Menten model
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 100, Part A, October 2016, Pages 61–71
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us