Diagnóstico do efluente sanitário em unidades prisionais de Minas Gerais: estudo de caso em quatro instituições localizadas nos municípios de Sete Lagoas, Santa Luzia e Caratinga
Data
Autor(es)
Orientado(es)
Título da Revista
ISSN da Revista
Título de Volume
Editor
Abstract
The reuse of wastewater has become an increasingly present problem due to water scarcity and contamination from human activities. The Minas Gerais penitentiary system also experiences this reality in its units and urgently needs studies that enable the reuse of effluents from its Sewage Treatment Stations (ETE), with the aim of reducing costs and preserving watercourses close to the units. The objective of this work was to evaluate the efficiency of sewage treatment in four units of the prison system in the municipalities of Caratinga, Santa Luzia and Sete Lagoas with a view to reusing the effluent for non-potable purposes. Samples were collected at the inlet and outlet of the sewage as well as analysis of the ETE. The following analyzes were carried out: Suspended Solids, Decanted Solids, pH, Nitrogen, Phosphorus, BOD and COD. At the APAC ETE in Santa Luzia, the parameters of BOD, COD, PH, Suspended Solids and Settled Solids, the results showed satisfactory results above 60%, showing inefficiency only in the Nitrogen and Phosphorus parameters. At the APAC ETE in Caratinga, efficiency was also above 60% for the Suspended Solids and Settled Solids parameters; BOD; COD, however showing a very significant variation in one of the BOD samples, COD with removal of less than 35%. The ETEs of the Prison units of Sete Lagoas and Caratinga are inoperative and, therefore, it is not possible to analyze efficiency, therefore, a diagnosis was presented with suggestions for correction and improvement of the systems. None of the systems studied showed a satisfactory reduction in parameters of total and fecal coliforms. Satisfactory performance values were observed, but still insufficient for effluent reuse, with operational and design problems being the main responsible for the low efficiency of effluent treatment at the analyzed stations.
