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Olive mill wastes: Biochemical characterizations and valorization strategies

Paper ID Volume ID Publish Year Pages File Format Full-Text
34550 45033 2013 21 PDF Available
Title
Olive mill wastes: Biochemical characterizations and valorization strategies
Abstract

•The olive oil extraction industry generates large amounts of by-products.•Olive mill wastes represent an important environmental problem.•Biochemical composition of olive oil by-products is complex.•Nowadays, olive oil by-products can find several kinds of applications.

The olive mill waste generated from olive oil extraction is a major environmental issue, particularly in Mediterranean areas. The extraction of olive oil is achieved through discontinuous or continuous processes. The two processes yield three fractions: a solid residue and two liquid phases (oil and olive mill wastewater). The characterization of these two by-products showed that they are mainly composed of phenolic compounds, carbohydrates, organic acids and mineral nutrients variably distributed depending on the process employed and the agronomic practices. Untreated olive by-products discharged between November and March into the environment are a major ecological issue for olive oil-producing countries due to their high toxic organic loads, low pH, and high chemical and biological demands. In this context, recent research studies highlight on the treatment approaches and valorization options for dealing with olive mill waste residues, predominantly those allowing for the recovery of valuable natural components such as phenolic compounds, dietary fibers, animal feed, biofuel, biogaz, enzymes, polymers and other. The impact of the chemical heterogeneity and water content of olive mill by-products about these processes of valorization and bioconversion is discussed.

Keywords
AIR, alcohol-insoluble residue; Ara, arabinose; BOD, biological oxygen demand; COD, chemical oxygen demand; CPBR, Cylindrical PhotoBioReactor; CSTR, Continuous Stirred Tank Reactor; 3,4-DHPEA-EDA, Decarboxymethyl Oleuropein-Aglycone; DF, dietary fiber; FP
First Page Preview
Olive mill wastes: Biochemical characterizations and valorization strategies
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 48, Issue 10, October 2013, Pages 1532–1552
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering