Characterization of condensates from an indirect olive oil pomace drying process:the effect of drying temperature

Papaioannou, E. H. and Patsios, S. I. and Karabelas, A. J. and Philippopoulos, N. A. (2013) Characterization of condensates from an indirect olive oil pomace drying process:the effect of drying temperature. Journal of Environmental Chemical Engineering, 1 (4). pp. 831-837. ISSN 2213-2929

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Abstract

Residual oil recovery from olive mill solids-containing residues (pomace) necessitates significant reduction of its water content, usually done in direct-contact dryers producing polluting vapors. An environmentally superior alternative involves pomace drying by indirect heating at modest temperatures, vapor condensation and condensate treatment for utilization or safe disposal. To develop such an integrated process, this study focuses on the condensates from pomace drying by indirect-heating at 70-120 C. These condensates exhibit fairly high concentration of organic substances, significant quantities of phenolic compounds, acidity, and low biodegradability. At the higher temperatures, local overheating of equipment surfaces, especially during the final stage of batch drying, tends to degrade condensate characteristics due to pyrolysis and/or vaporization of organic matter. At relatively low temperatures, condensates exhibit smaller concentration of organic and phenolic compounds, which entail improved biodegradability. Therefore, relatively low temperatures, combined with moderate vacuum, appear to be preferable drying conditions facilitating further condensate treatment.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Environmental Chemical Engineering
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
82184
Deposited By:
Deposited On:
13 Oct 2016 13:52
Refereed?:
Yes
Published?:
Published
Last Modified:
06 May 2020 04:37