Desenvolvimento de um sistema solar para eliminação do ácido cianídrico de efluentes de casa de farinha

Abstract

The manipueira is a toxic liquid extracted from cassava during the flour processing, rich in potassium, phosphorus, nitrogen and other nutrients. When left untreated it can bring some health damage caused by their strong odor, besides contributing to the proliferation of insects and other harmful vectors to health. In large quantities, the manipueira becomes a pollutant effluent, due to high organic matter content and of hydrocyanic acid that can intoxicate animals and contaminate the waters of cisterns. The aim of this study is to evaluate the kinetics of removal of hydrocyanic acid (HCN) contained in manipueira, collected from flour's houses in the state of Sergipe, using as a means of removing a solar system, known as solar concentrator in linear type, cylindrical, parabolic section and hinged on only one axis. For this study were used two samples of manipueira from two different flour's houses from State of Sergipe, at concentrations of hydrocyanic acid of 100 mg/L and 400 mg/L. For each sample of manipueira used in solar concentrator in function of input flow in the solar system were established process times of three and six hours. At the end of the experiments in solar concentrator was found that there was a reduction from initial concentration around 85.7% for the process with six hours and 50% reduction for the three-hour process, independent of the concentration of manipueira studied.