
handle: 11441/73665
Both chemical and biological processes for wastewater treatment have inherent limitations in applicability, effectiveness and cost. Chemical treatments are mostly appropriate for wastewater wlth recalcitrant compounds, but their use as a complete destruction method generates high costs. Although biological treatment is considered an efficient destructive process, it is suitable onLy for non toxic wastewaters. Compounds that are tcx c, inhibitory or refractory to biological degradation could be pretreated by a chemical process to produce biodegradable intermediates, which increases removal efficiency. A combination of biological followed by chemical processes may prove useful for wastewater containing large amounts of biodegradable organics in addition to relatively small concentration of recalcitrant pollutants. This study reviews advanced and conventonal chemical processes for wastewater treatment.
Existen una gran variedad de tratamientos químicos y biológicos para la depuración de aguas residuales, cada uno de ellos con limitaciones relativas a su grado de aplicabilidad, eficiencia y costes económicos. Los tratamientos químicos son apropiados cuando el agua residual contiene compuestos recalcitrantes a la biodegradación, y tóxicos o inhibidores del cultivo biológico. No obstante, su empleo hasta la degradación total de estos compuestos puede generar importantes costes económicos. La combinación de procesos biológicos y químicos, ya sea como pre- o post tratamientos, puede ser una alternativa razonable para este tipo de aguas residuales. En este trabajo, se realiza una revisión de los principales tratamientos químicos aplicados a la depuración de aguas residuales.
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