Diseño de una planta de tratamiento de efluentes contaminados con colorantes y tensoactivos mediante un proceso Fenton modificado

Abstract

The objective of this work was to design a wastewater plant for reduce the dyes and surfactants concentrations with two processes combined, a saline precipitation followed by filtration and Fenton-like process with citric acid through a modified Fenton process with citric acid. The treatment design applied the best results from a research project and the physical-chemical characterization of this effluent. First, the mass and energy balances were determined in each process. Then, the design criteria of the main equipment and the selection criteria of the secondary teams were defined. The diagrams BFD, PFD, P & ID, layout and elevation plans were made. A homogenization tank, a mixing tank, a conditioning tank, a Fenton reactor, two granular filters and three settling tanks were the main equipment´s. The secondary equipment were valves, pipes, pumps and agitators. The system was designed for an average flow of 1,90 m3/h and works for two daily shifts of 8 hours. The estimate cost for implementation was 57 622,80 USD, the operating cost was 5 912,16 USD/month, and the treatment cost was 6,48 USD/m3 of wastewater. The cost-benefit ratio was greater that one, which means that for each dollar invested the payment of 1,06 USD due to fines.