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Wet air oxidation of oily wastes generated aboard ships: kinetic modeling
J López Bernal1, J R Portela Miguélez, E Nebot Sanz
1Department of Navigation Sciences and Techniques, Machines and Thermal Engines, Signal Theory and Communications, CASEM, University of Cádiz, 11510 Puerto Real, Cádiz, Spain.
Abstract:
Ships are floating industrial plants which generate great amounts of toxic and hazardous wastes. Nevertheless, a feasible model for the management of such wastes has not been developed yet. This work studies the feasibility of treating those wastes aboard the ship by means of aqueous oxidation at high pressures and temperatures. Wet air oxidation has proved to be a very efficient technology for the treatment of those residual currents, resulting in destruction efficiencies of greater than 90% of initial COD and 99.9% of oil/greases content. A kinetic model for the oxidation process, based on a series-parallel reaction pathway, is proposed and is shown to fit the experimental results.