Análise do desempenho de uma estação de tratamento de água residuária doméstica na cidade de mossoró-rn

Abstract

Among the main causes of water pollution is the release of untreated domestic wastewater, reducing water quality and increasing the risk of contamination in waterborne diseases. The treatment and reuse of domestic wastewater is an alternative to the mitigation of environmental problems. This work aimed to evaluate the performance of a sewage treatment plant and water from the domestic generator generated in a condominium in the municipality of Mossoró-RN. The sewage treatment plant (ETE) is a series of domestic water with grille, sandblaster, aerated biological reactor and artificial ultraviolet reactor. The experiment was set up in a completely randomized design with three treatments and four repetitions without time. The monitoring of wastewater quality did not occur in the period of 2017. For this, the effluent samples were collected monthly upstream and downstream of the aerated biological reactor and downstream of the artificial ultraviolet reactor. N, P, Na +, K +, Na +, Na +, Na +, Na +, Na +, Na +, Na + , Ca2 +, Mg2 +, Cl-, CO32-, HCO3- and RAS - sodium adsorption ratio) and microbiological (total coliforms, Escherichia coli and helminth eggs) of household wastewater. They were confronted with existing legislation and standards to reuse water in agricultural and forestry activities. The vector treatment process must be above 97% for COD, as well as for Turbidity with removal of 98%; Content of oil and grease (removal of 92.23%) and for total coliforms and E.coli the ultraviolet radiation that the treatment was done in reduction 8 and 7 logarithmic units respectively. The final effluent met the criteria required by the legislation for agricultural and forestry use