معالجة مادة المرجين بواسطة المبخر الطبيعي ً بوصفه نموذجا إيكولوجيا : مثال من تونس

Abstract EN

Tunisia is considered a major cultivator of olive and exporter of olive oil.

The Tunisian olive oil activity is constantly developing, given that the country is making great efforts to produce a competitive product in quantity and quality.

However, this development generates a large amount of olive mill wastewater, which is a basic by-product extracted from the olives.

This wastewater is considered a toxic substance and constitutes a very strong environmental pollutant when it is discharged into the environment.

Treating olive mill wastewater by natural evaporation could be a new alternative.

Our goal is to design and prototype a closed system for bio-evaporation that is low cost, easy to operate, and requires less maintenance.

The system in question can evaporate 80% of the olive-mill wastewater and produces 20% of the solid substance.

The physio-chemical analysis showed that this generated water is less loaded with organic matter in terms of COD (0.125 ± 0.001 g/ L) and BOD (0.0387 ± 0.0006 g/L) than that of standard olive-mill wastewater (14333.33 ± 763.76 g/ L and 4683.33 ± 208.17 g/ L, respectively).

It also contains a lower concentration of phenolic compounds than those found in olive-mill wastewater (0.012 ± 0.005 mg/ L).

The microbiological study showed the complete absence of pathogenic microorganisms.

Also, the pH of collected water is around 3.26 ± 0.092.

As a result, the collected water can be reused to clean and disinfect places like factories and farms.

To complete this study, the solid substance (paste) obtained after treatment of the olive mill wastewater was assessed by saponification.