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Supercritical water oxidation of toxic waste generated in veterinary practices


Forensic Research & Criminology International Journal
Rosalina Gonzalez, Department of Environmental and Sanitary Engineering, La Salle University, Colombia
Paula Cárdenas, Department of Environmental and Sanitary Engineering, La Salle University, Colombia
Landinez , Department of Environmental and Sanitary Engineering, La Salle University, Colombia

Abstract

The preservation of anatomical samples is a critical step in the veterinary practices. For this purpose, formaldehyde diluted in water is commonly used. It is deposited in large ponds where the pieces are placed. The problem is that in Colombia this chemical is considered as a pollutant by the environmental forensic authorities, due its properties and the damage that it can be caused to the water resources if it is no treated before to disposal. To treat this waste and prevent legal problems it was selected the supercritical oxidation technique. This method is highly efficient in destruction of toxic organic compounds. The samples were obtained from the Anatomical Lab of La Salle University in Bogotá-Colombia. The best result was an efficiency of destruction of 99.51% using 500°C, 5 min and 100 % H2O2Excess. It permitted the reduction of COD from 9200 mg L-1 to 40 mg L-1, allowing the compliance of the regulation and indicating that the method is effective for the treatment of this kind of waste in a batch reactor.

Keywords

Formaldehyde, Supercritical, Water, Oxidation, SCWO, Anatomical, Labs, Waste, Supercritical, Compounds, Hydrogen, Reagents, Peroxide, Refrigerator

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