Integration of traditional systems and advanced oxidation process technologies for the industrial treatment of olive mill wastewaters

Environmental Technology
Nuno Amaral-SilvaRosa M Quinta-Ferreira

Abstract

A complete industrial treatment system (involving the integration of coagulation/flocculation and Fenton processes) to depurate real wastewaters coming from two-phase olive oil production mills has been studied. The experimental results indicated that at the end of this combined strategy, involving a primary physical separation stage followed by Fenton's chemical oxidation, chemical oxygen demand (COD) is reduced up to 90% and total polyphenols' concentration is decreased up to 92%. The treated stream biodegradability (BOD5/COD) reached 0.52 and the Total Suspended Solids (TSSs) and Total Dissolved Solids (TDSs) decreased up to 95% and 69%, respectively. Fenton's procedure was optimized bearing in mind the pH adjustment step, different procedures for hydrogen peroxide addition and the use of coagulants instead of the chemical precipitation (by raising pH) to promote iron sludge settling. Our results demonstrated that pH (3.0 ± 0.1) control during the oxidation reaction improves the oxidation efficiency. Moreover, the final NaOH addition is essential to a better sludge formation and consequent precipitation of the residual iron removing also some organic matter.

References

Mar 12, 2003·Journal of Hazardous Materials·E Neyens, J Baeyens
Sep 20, 2005·Water Research·Marina GotsiDionissios Mantzavinos
Nov 29, 2005·Journal of Hazardous Materials·Andreas GinosDionissios Mantzavinos
Dec 27, 2005·Journal of Environmental Management·Cláudia Telles BenattiTerezinha Aparecida Guedes
Feb 17, 2006·Journal of Hazardous Materials·Ipek GulkayaFiliz B Dilek
Mar 22, 2006·Environmental Technology·M TrapidoN Kulik
Mar 14, 2007·Journal of Agricultural and Food Chemistry·Apostolis AgaliasThrasyvoulos Manios
Nov 17, 2007·Water Research·Roberto AndreozziAntonino Pollio
Apr 7, 2009·Journal of Hazardous Materials·Marco S Lucas, José A Peres

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