Melhoria do tratamento de efluentes de uma indústria de bebidas em Maceió – AL

Abstract

The aim of industrial processing is the transformation of raw materials into high value products. Although the processing materials (products), byproducts are generated, some of which have commercial value and are totally undesirable. These ones are called industrial wastes (sewages), which must be disposed in a way that causes less environmental impact, complying with the laws in force in the country. In order to maintain the quality of the treated water, Sewage Treatment Station (STS) may undergo changes in its physical structure, as well as the chemicals to enable the treatment from an good economic and environmental point of view to cope with required parameters. This work aims to evaluate the effluent treatment system of a beverage industry located in Maceió – AL, Brazil. The operational conditions for preparing and dosing chemicals were evaluated in order to reduce product consumption and increase the efficiency of the system. The treatment process in the industrial unit uses the clarification steps (filtration, coagulation, flocculation and flotation). The study provided excellent results, significantly reducing the pollutant load of the evaluated parameters: Color by 83% and 93% of phosphorus removal, also highlighting the reduction in operating costs by 29%. Thus, the results obtained allow us to argue that the improvements applied in the preparation and dosage of chemicals and the new operating parameters have had a positive impact on the viability if the dissolved air flotation system (DAF).