Journal
DESALINATION
Volume 169, Issue 1, Pages 81-88Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2004.08.009
Keywords
olive mill wastewater; advanced oxidation process; ultrafiltration
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Olive oil production results in important quantities of wastewater containing large amounts of total solids and organic carbon as well as low oil concentrations. This paper describes the treatment of olive mill wastewater (OMW) by combining an ultrafiltration (UF) technique and an advanced oxidation process (AOP) using UV/H2O2. It further demonstrates the technical feasibility of this compact and stable process to remove a large part of total solids and organic carbon. Indeed, UF reduces the pollutants contained in the OMW with an apparent rejection coefficient R-COD in the range of 94%. The UV/H2O2 oxidation process may be easily used, in combination with UF, to finish the treatment of the permeate. The results obtained in batch and continuous mode showed that this technique offered a treated solution which complies with legal requirements. A final concentration of 17 mg(TOC) dm(-3) was obtained, which corresponds to a final COD of 52 mg dm(-3), while the legal requirement is 125. Furthermore, the final effluent is fully decolorized.
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