Catalytic Ozonation Using Fe²⁺ in the Treatment of Dairy Effluent in a Semi-Batch Process with Recycle

Author(s)

Raquel A. Messias ^[1] ; Hélcio J. I. Filho ^[2] ; Guilherme A. Ferreira ^[3] ; Otávio A. Silva ^[4] ; Adriano F. Siqueira ^[5] ; Marco A. K. Alcântara ^[6]

Affiliation

^[1] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

^[2] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

^[3] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

^[4] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

^[5] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

^[6] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 26, n. 7, p. 1509-1519, 2015-07-00.

Abstract

<p>This work describes the treatment of dairy industry effluent using catalytic ozonation with Fe²⁺ as its catalyst in a semi-batch process with recycle. A fractional factorial design 24^-1 was used with a reduction percentage of total organic carbon (TOCred) as response. Optimal conditions were obtained by the reaction time of 30 min, ozonator power of 35 W, O₂ flow rate of 0.125 L min^-1, Fe²⁺ concentration of 1.0 g L^-1 and pH 4.0 for a 2 L raw effluent. TOCred of 64.03% represents a decrease in concentration from 473.0 to 170.1 mg L^-1, with an estimate cost of US$ 0.03 L^-1effluent. The treatment performed was not sufficient to discharge it directly on surface water; however, significant reduction of TOCred, among physical and chemical characteristics makes a better product to be proceeded into a biological treatment.</p> (AU)

• FAPESP's process: 09/17650-2 - Application and optimization of advanced oxidation processes for leachate degradation originated from sanitary landfills
• Grantee: Hélcio José Izário Filho
• Support Opportunities: Regular Research Grants