Viabilidade do reúso urbano não potável dos efluentes da estação de tratamento de esgotos Jundiaí/Guarapes

Abstract

As in other countries, non-potable urban reuse has been gaining ground every day in some of the main Brazilian cities, considering that this practice can be seen as a sustainable alternative to combat water scarcity in certain cities. Regions due to their low natural water availability, or due to high demand, especially in municipalities with high demographic densities and consequently high consumption of drinking water. The city of Natal-RN is currently undergoing a reformulation and expansion of its sanitary sewage system, with the addition of the sewage collection and transport system and the implementation of two new Sewage Treatment Stations (ETE Jaguaribe and ETE JundiaíGuarapes ), which will result in a significant increase in the flow of treated effluents, and a consequent increase in the potential for reuse of these effluents for various purposes. That said, the main objective of the present work was to evaluate the feasibility of implementing the non-potable urban reuse system of effluents to be generated at the Jundiaí/Guarapes Sewage Treatment Station in the neighborhoods of the west of Natal. For that, the possible applications for reuse water in the neighborhoods that make up the west of the capital Potiguar were identified, as well as the daily demands for these purposes were calculated. Then, the shorts for the implementation and operation of the reuse system were raised and they were compared with the use of potable water. It was found that the ETE Jundiaí/Guarapes had sufficient flow to meet the demand raised, as well as that the implementation of the reuse system proposed here, although it implies reasonable initial costs for its implementation, would result in savings of R$ 38.409,69 per year, resulting from the annual savings of 16,944 m³ of potable water that would be available for more noble uses. In this way, it is concluded that the implementation of the non-potable urban reuse system is viable and with financial return of the costs for implementation in less than a year of its implementation.