Avaliação do desempenho da osmose reversa e da troca iônica para tratamento de efluente de curtume (Aimore Couros LTDA - Encantado) visando a reutilização da água.

Abstract

The present work aimed to accomplish a case study about two forms of treatment to reutilize the final efluent of a tanning industry - Aimoré Couros Ltda (a leather company) - through the use of a system of final polishing of the treated efluent. When analyzing the productive process of the company Aimoré Couros Ltda - Encantado/RS it was noticed the great amount of water spent in such process. In order to minimize this waste, we searched to adapt a methodology in which the liquid efluent passed by a process of reduction of the parameters or pollution indicators. For this, two desmineralization methods were researched: Ionic exchange and Reverse Osmosis in a way to identify the one which presents the largest effectiveness in the reduction of those contaminators. In the testing, both methods were satisfactory, however the Reverse Osmosis presented larger efficiency reducing tenors in a margin above 70% and some indexes as Chromium, DBO5, Suspended Solids reduced 100% approximately. While the Ionic Exchange had good results, also letting the DBO% in non detected, that is, a reduction of approximately 100% and the rest of the contaminators with reductions over 40%.