Abstract

RODRIGUEZ, Rosa Ana et al. Gasificación de residuos agroindustriales: predicción del comportamiento de distintos contaminantes. Cienc. docencia tecnol. [online]. 2013, n.47, pp.161-185. ISSN 1851-1716.

Three agro-industrial wastes were characterized in order to carry out their thermal gasification, performing their immediate analysis determining concentration of Ca, K and Mg as well as of the three toxic representative metals: Cd, Cr and Pb, in their oxidation states and ground state. Concentration of those heavy metals was also determined in ashes resulting from the gasification process, and their motility was studied through three lixiviation essays. In order to predict the behavior of heavy metals, sulfur and chlorine compounds, the presence of water vapor, synthesis gas, Ca, Mg, K, Si, Al and other ash components was analyzed. Heavy metals are not more concentrated in gasification ashes; therefore they are released during the process. The Ca, Mg and K presence in these residues would aid the pollutants retention. According to the results of the leaching tests, ashes are considered non toxic.

Keywords : Environmental technology; Gasification; Agro-industrial wastes; Pollutant emissions; Ash.

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