O USO DA ADSORÇÃO EM CARVÃO ATIVADO PULVERIZADO NA REMOÇÃO DE MATÉRIA ORGÂNICA NATURAL EM ETA DE CICLO COMPLETO

Abstract

Currently there is an evident concentration of organic matter in water courses and/or water reservoirs that receive inputs from domestic sewage and untreated industrial effluents, that suffer from drought, and that have natural conditions for occurrences of natural organic matter. The consequences can be eutrophication, occurrences of taste and odor, formation of by-products of chlorination and interferences in the water treatment process. One of the alternatives used in ETAs to remove organic material is adsorption on pulverized activated carbon (CAP). In this context, the present study aimed to investigate the influence of the variables contact time, dosage and type of pulverized activated carbon, on the efficiency of the adsorption of organic matter in raw water submitted to the full cycle treatment process. The evaluation was carried out using two types of CAPs of plant origin. CAP from wood had a significant influence on contact time and dosage in the removal of organic matter measured in total organic carbon (TOC), that is, higher dosage and contact time brought better results. Dosages of 30 mg/L and contact time of 25 minutes obtained the best results, reaching removal efficiencies in the order of 91% and TOC concentration of 2.05 mg/L.