Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volume 44, Issue 2, Pages 198-205Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10934520802539889
Keywords
Olive mill wastewater; Fenton reagent; chemical oxidation; lime treatment; chemical coagulation-flocculation
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Funding
- CT (Fundacao para a Ciencia e a Tecnologia-Portugal) [BDE/15576/2005]
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Olive mill wastewater (OMW) was exposed to Fenton treatment and subjected to post Fenton coagulation/flocculation using lime. Several tests were performed for different R = H2O2/COD ratios, from 0.25 to 3.0, promoting the gradual addition of H2O2 and Fe2 +, with the original condition of a pH = 3.5 and maintaining a constant relationship H2O2/Fe2 + = 15. A maximum reduction of COD of 96.8% was obtained using Fenton reagent with R = 3.0. In a second phase, the effluent which was neutralized with Ca(OH)2 reached a higher reduction of COD, achieving a final degradation value of 99.3%. Overall, the results show evidence of the potential value of applying the combined process tested.
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