Estudo de viabilidade econômica do aproveitamento comercial de areia retida no tratamento preliminar da ETE Onça –MG

The reuse of by-products from the treatment of sanitary sewage is a subject that is growing more and more currently. This work aims to conduct an economic evaluation of the reuse of the sand from the preliminary treatment of the Sewage Treatment Plant Ribeiração do Onça (ETE Onça). For this, the steps necessary for this reuse were: washing, drying, odor control and vector proliferation and hygiene. For washing was used a sand washer. In drying, it was decided to use drying patios already built in the ETE. For the control of odor, vector proliferation and hygienization an addition of lime was calculated. Among the expenses and gains from the sale of sand, it was estimated that from the 20th month the ETE would have recovered the initial expenses and at the end of 2 years it would obtain a total profit of R$ 46.259,33 jcec