Physicochemical Characterization and Estimation of the Pollution Degree of Olive Oil Mill Wastewaters from the Cold Extraction System and the Traditional System
No Thumbnail Available
Date
2023
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
live oil production is widespread in Mediterranean countries such as
Algeria. One of the main by-products from olive oil extraction is olive oil mill
wastewater (OMW). It considers as an environmental problem for the producing
countries. This study aimed to compare the physicochemical characterization and
the pollution degree of OMW obtained from two different extraction systems, cold
extraction system and traditional system, in Khenchela, eastern Algeria. The results
of the physicochemical analyzes have shown that olive mill wastewaters from the
two systems were very acidic and very rich in organic and mineral matter. There
was a significant effect on electrical conductivity (EC), biological oxygen demand
(BOD
), chemical oxygen demand (COD), fatty matter (FM), organic matter (OM),
and polyphenols (PP). While there was no significant difference for the parameters
pH, humidity (H%), dry matter (DM), total suspended solids (TSS%), and mineral
matter (MM). For the two pollution indices studied, BOD
5
/COD and BI (biodegradability
index), there was not a significant effect. It was recorded approximately similar
values. In conclusion, the cold extraction system was the least polluting compared
to the traditional extraction system. In addition, the pollution indicators clearly
demonstrated the biodegradable nature of these wastewaters, for which biological
remediation is appropriate.