Análise de uma estação de tratamento de água quanto à geração e destinação de resíduos

Abstract

A water treatment plant generates waste to produce drinking water, the main ones are the sludge generated in decanter and the water used to wash the filters. Currently, there are laws that prescribe that the management of waste from water treatment plants must be carried out in an environmentally adequate manner, however, it is observed that this is not the case in Brazil, where much of this waste is directly disposed of in water bodies without treatment. In this paper a water treatment plant placed in the west of Paraná, which uses aluminum polychloride as a coagulant is analyzed for quantification - using empirical formulas and on-site measurements -, characterization - through laboratory analysis - and management - using indicators suggested in bibliography - of the waste generated in its productive processes. The results indicated that the WTP in question does not present adequate treatment or final disposal for such waste, the indicators of sludge generation in decanters presented lower values than the ones found in bibliography, however the indicators for filter backwash water presented high values. It was also verified that the sludge estimates generated by most empirical formulas applied approximate to the measured value on-site, indicating the applicability of these in this WTP specifically.