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

Journal of the Brazilian Chemical Society

Raquel A. Messias¹  Hélcio J. I. Filho¹  Guilherme A. Ferreira¹  Otávio A. Silva¹  Adriano F. Siqueira¹  Marco A. K. Alcântara¹ 

关键词: dairy industry;    catalytic ozonation;    advanced oxidation processes;   

DOI  :  10.5935/0103-5053.20150120

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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