EXTRAÇÃO E APLICAÇÃO DE COAGULANTE VEGETAL À BASE DE TANINOPARA O TRATAMENTO DE EFLUENTES TÊXTEIS

Authors

  • Cíntia Merisio Pedrini
  • Rafaela Bohaczuk Venturelli Knop

Abstract

Researches prove that plant residues, mainly tree bark, have properties that can be extracted, such as tannin, which can later be applied as a coagulant in the treatment of textile effluents. The textile industry, of great importance in the Vale doItajaí region, is responsible for generating a large amount of effluent from textile processing. In this scenario, the objective was to use the bark of Pinus taeda and Eucalyptus grandis to extract tannins in an autoclave and apply it as a coagulant in the treatment of textile industrial effluents. For the extraction of tannins, distilled water, sodium sulphite or sodium hydroxide were used as solvents. The tannic solutions obtained were submitted to Jar test tests, being used as coagulants in the treatment of effluents collected in a textile industry. The solvent that obtained the best results in both species was the sodium sulphite. Compared to eucalyptus, Pinus taeda was more
effective in the coagulation and flocculation process of the effluent under analysis. It is also noteworthy that the pH of the effluent obtained in the treatment meets the standard imposed by the Water Resources Legislation in the state of Santa Catarina.

Published

2022-08-29