Tratamento e reutilização do efluente têxtil gerado pelos laboratórios de lavanderia e estamparia, em processo de tingimento têxtil

Abstract

Currently, environmental contamination is one of the biggest problems with society. Therefore, the industries have taken a new attitude toward environmental issues in pursuit of sustainable development. In this context, the textile sector has a high potential for pollution, whereas this industries feature a high relation of water consumed by volume of processed material. This industry also generates amounts excessive of effluent, that are highly colored due to the presence of dyes that does not fixate on the fiber during the dyeing process, in addition to high organic loading and compounds toxic chemicals. These chemicals can not be discarded in the sewage network or in water bodies, or simply be thrown into the soil without adequate treatment to removal these agents contaminants. This search aims optimize better terms for planning factorial, the execution of treatment chemical physical of textile effluents, using Tanino (organic coagulant) singly, like coagulant, flocculant and/or complement. Subsequently, the treated effluent will be reused in dyeing processes, with dye reactive in fabric PT 100% cotton and compared with the same process using water with base in tests of quality of textile articles. The main results showed that the best conditions for color removal were in treatment with tannin concentration of 150 mg l-1 at pH 6.0 and aluminum sulphate concentration of 900 mg l-1 at pH 10. reuse it was found that the main interference given to the use of the effluent treated with aluminum sulphate because of residual metal remaining in the effluent after treatment.