Treatment of a wastewater from a pesticide manufacture by combined coagulation and Fenton oxidation

The treatment of a non-biodegradable agrochemical wastewater has been studied by coupling of preliminary coagulation—flocculation step and further Fenton oxidation. High percentages of chemical oxygen demand (COD) removal (up to 58 %) were achieved in a first step using polyferric chloride as coagul...

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Veröffentlicht in:Environmental science and pollution research international 2014-11, Vol.21 (21), p.12129-12134
Hauptverfasser: Pliego, G, Zazo, J. A, Pariente, M. I, Rodríguez, I, Petre, A. L, Leton, P, García, J
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Sprache:eng
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Zusammenfassung:The treatment of a non-biodegradable agrochemical wastewater has been studied by coupling of preliminary coagulation—flocculation step and further Fenton oxidation. High percentages of chemical oxygen demand (COD) removal (up to 58 %) were achieved in a first step using polyferric chloride as coagulant. This reduced significantly the amount of H₂O₂ required in the further Fenton oxidation. Using the stoichiometric amount relative to COD around 80 % of the remaining organic load was mineralized. The combined treatment allowed achieving the regional discharge limits of ecotoxicity at a cost substantially lower than the solution used so far where these wastewaters are managed as hazardous wastes.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-014-2880-1