Avaliação das perdas de água no sistema pela substituição de hidrômetros velocimétricos por volumétricos

Abstract

The new Sanitation framework aims primarily to universalize and enhance the sector, particularly in water supply. Targets have been set, such as universalization by 2033, aiming to provide 99% of the Brazilian population with potable water. Achieving these targets entails the need for evolution among concessionaires, making them more competitive to face private sector companies. Volume control in water supply systems is a strategy for measuring and managing water losses. These losses can be categorized as real (physical) or apparent (commercial). Commercial losses primarily occur due to under-measurement of water meters, influenced by usage, age, and technology. The adoption of new measurement technologies is a strategy for sanitation companies to improve their loss indicators and increase their revenue. Efficiency in water measurement can be optimized through the use of advanced technologies, such as volumetric meters, although these have a higher initial cost compared to velocity meters. In this context, the aim of this research is to evaluate the impact of replacing 606 water meters in the municipality of Pedrinhas Paulista/SP. The analysis covers all water connections in the municipality over a period of 19 months (from January 2022 to July 2023). The data provided by the concessionaire were organized and processed in electronic spreadsheets using Microsoft Excel® software. Monthly, average volumes consumed (in m³) and billed volumes (in m³ and in R$) were analyzed by type of water meter and overall. Subsequently, loss indicators were calculated, and an economic evaluation of the investment was conducted. The results reveal a loss rate of 11.3% in the municipality. When comparing volumetric meters with velocity meters, an average gain of R$12.89 per water connection and an increase of 11.43% in the average volume consumed were observed. The investment made shows a return within a period of 21 months.