Regresar

Removal of chromium using horizontal subsurface flow constructed wetlands

Abstract:

Wetlands are among these-called natural treatment systems where contaminants in the wastewater are removed through by physical, chemical and biological processes naturally. The Tanneries are industries with large volumes of contaminated wastewater. In Cuba the tannery Cai-barien Villa Clara of province has not an optimal treatment system for its waste, so that the discharged here of to the surrounding environment is a major problem, especially if we consider into account the presence of sulphides and heavy metals such as chromium. This paper builds on a laboratory scale artificial wetland sub-surface flow for evaluation in the removal of chromium from wastewater industry, obtaining efficiency between 88% and 92%. This is the element of interest in the work, since it is known to harm posed to human health and the environment as this is a persistent element.