A Novel Two-Step Process to Co-valorize Antioxidant Rich By-products of Olive and Grape Processing Industries

Karakaya A., KENAR A., Laleli Y., Takac S.

WASTE AND BIOMASS VALORIZATION, vol.8, no.3, pp.829-837, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 3
  • Publication Date: 2017
  • Doi Number: 10.1007/s12649-016-9635-9
  • Journal Name: WASTE AND BIOMASS VALORIZATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.829-837
  • Keywords: Olive mill wastewater, Grape pomace, Phenolic compound, Response surface methodology, Solvent extraction, MILL WASTE-WATER, PHENOLIC-COMPOUNDS, BIOLOGICAL-PROPERTIES, EXTRACTION, MARC, HYDROXYTYROSOL, ADSORPTION, MANAGEMENT, COMPONENTS, FRACTIONS
  • Ankara University Affiliated: Yes

Abstract

An integrated process for collective recovery of phenolic compounds from olive mill wastewater (OMW) and grape pomace (GP), which would also benefit easier biodegradation of OMW in a further process, was developed. Response surface methodology was employed to optimize the process parameters. Treatment of GP with OMW resulted in the transfer of 64.41 % of total polyphenols contained in OMW to GP under the optimal conditions predicted by the model. In the following step, extraction of phenolic compounds in treated-GP with ethyl alcohol:water under the optimum conditions predicted by the model was performed and 11.97 mg g(-1) phenolics was recovered. The total antioxidant activity of the recovered phenolics was 81 % (inh.).