Tecnologia sustentável para tratamento de efluentes de estações de tratamento de água com aproveitamento na agricultura irrigada.

Abstract

The characteristics of the effluents from Wastewater Treatment Plants (WTP)indicates that its outflow may cause problems for the environment, which is why this paper proposes to develop alternative treatment technologies applied to the reuse of these effluents. The study approaches alternative solutions towards the proper management of local water resources, specifically for the use of the residual water of the Gravatá WTP in irrigated agriculture. The development and application of technologies were mediated by adsorption processes in batch and continuous flow column,which used the dry biomass of aquatic plants (Salviniasp), shells of shellfish (Anomalocardia brasiliana) and activated carbon from coconut shell as adsorbentsubstrates.The wastewater available for reuse was first categorizedin order to enable the subsequent methodological plan focused on a qualitative, quantitative, investigative, correlative and significant study.The research found satisfactory results for nitrate (NO3 -) and aluminum (Al+3) removal using separate and mixed substrates. The kinetic and adsorption isotherm studies have proven the effectiveness of the technology developedand applied to the treatment of wastewater of the Gravatá WTP and its reuse in family farming.