Estudo comparativo entre técnicas de determinação da matéria orgância em efluentes industriais de composição carbonácea

Abstract

In this paper an assessment is made against accuracy and precision of analytical techniques for quantification of organic matter in effluent characteristics toxic and biodegradable carbonaceous source. The work consisted in the development of synthetic solutions of sacarose (component present in industrial effluents from food) and phenol (toxic component present in petrochemical effluents). These solutions were evaluated for the levels of repeatability and reproducibility of the techniques for determination of organic matter through the following methods: total solids - TS, volatile solids - SV, direct determination of phenols, direct determination of the content total sugars - AT, total organic carbon - TOC, biochemical oxygen demand - BOD, chemical oxygen demand - COD and high performance liquid chromatography - (HPLC). the results point to substantial errors in the measurement of these constituents by the technique BOD as a function of the mechanism of indirect determination of oxygen consumption, which leads to errors and dependence on reaction kinetics, as well as a good representation by the gravimetric technique to determine the content of volatile solids