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Cosmetic wastewater treatment by coagulation and advanced oxidation processes
- Naumczyk, Jeremi, Bogacki, Jan, Marcinowski, Piotr, Kowalik, Paweł
- Environmental technology 2014 v.35 no.5 pp. 541-548
- aluminum, chemical oxygen demand, coagulation, environmental technology, free radical scavengers, neutralization, oxidation, wastewater, wastewater treatment
- In this study, the treatment process of three cosmetic wastewater types has been investigated. Coagulation allowed to achieve chemical oxygen demand (COD) removal of 74.6%, 37.7% and 74.0% for samples A (Al ₂(SO ₄) ₃), B (Brentafloc F3) and C (PAX 16), respectively. The Fenton process proved to be effective as well – COD removal was equal to 75.1%, 44.7% and 68.1%, respectively. Coagulation with FeCl ₃ and the subsequent photo-Fenton process resulted in the best values of final COD removal equal to 92.4%, 62.8% and 90.2%. In case of the Fenton process, after coagulation these values were equal to 74.9%, 50.1% and 84.8%, while in case of the H ₂O ₂/UV process, the obtained COD removal was 83.8%, 36.2% and 80.9%. High value of COD removal in the Fenton process carried out for A and C wastewater samples was caused by a significant contribution of the final neutralization/coagulation. Very small effect of the oxidation reaction in the Fenton process in case of sample A resulting from the presence of antioxidants, ‘OH radical scavengers’ in the wastewater.