Feasibility study of the implementation of an evapotranspiration basin with the aid of an ash box as preliminary treatment

Abstract

The present work aimed at providing knowledge in new sanitation techniques for rural populations and all those who wish to live in a more sustainable way, developing an adequate treatment for their effluents generated in their daily lives. A large part of the Brazilian population does not have basic sanitation or has inadequate forms, such as septic tanks that contaminate the soil and subsequently the water resources of the entire region, with pathogens. Thinking about this idea, an ecologically sustainable way was developed for the treatment of black waters, the Evapotranspiration Basin (BET) with the innovation of the ash box. The sewage coming from the toilet is directed to the ash box built of waterproofed masonry, where it receives preliminary treatment, a gridded basket inside the box retaining coarse solids. In this same box wood ash is added that acts as a flocculant and PH regulator, optimizing the anaerobic digestion process inside the chamber formed by tires in the Evapotranspiration Basin, an impermeable masonry tank submerged in the soil where bacteria remineralize all organic matter. The water contained in the sewage passes through an ascending granulometric filter until it reaches the roots of the plants, where it goes through a natural process of Evapotranspiration, returning a large part of this purified water to the environment. The objective was to compare the budgets of other works and show the economic viability of a BET with the innovation of the ash box.

DOI: 10.56238/homeinternationalanais-049