Operacionalização e controle da captação de água subterrânea em fábrica confecionista

Abstract

Water is an essential resource for human life and the Northeast region of Brazil suffers from its scarcity. The present work presents a methodology for capturing underground water from an well to be used in the cleaning of environments and human consumption in a medium-sized garment factory in order to strengthen the local economy and optimize the use of available water resources. From the water consumption history, a water demand of 1.90m³ / h was estimated using the moving average method. A submerged centrifugal pump with a power of 0.75 CV was used and through the interactive application of the mechanical energy conservation equation provided by the Solver functionality of the Excel tool, a flow rate of 6.23m³ / h was determined. The friction factor obtained by using the characteristic Haaland equation is equivalent to 0.0231. Based on the knowledge of the water demand and the volumetric flow rate provided by the pump, graphs were prepared to monitor the volume stored in the reservoir for the destination of the captured water, a 30m³ water tank, through mass balance. A period of 3.76 hours (3h: 46min) for filling the tank from the zero volume was determined. Considering that the capture will take place after the end of the 10-hour work shift, the replacement volume corresponds to 5m³. In addition to operational aspects, the savings generated by the implementation of the project were analyzed. A 0.4 month payback was obtained, with a monthly capital return rate of R$ 17,504.00. Thus, in this context, the study evaluated the operational and economic viability of the implantation the project in order to provide support and guarantee, contributing to the increase in the availability of drinking water resources.