Qualidade da água de abastecimento público tratada por sistema convencional de um município localizado na Região Noroeste do Rs

Abstract

Public water supply can be a vehicle for disease and damage to the health of the population, so efficient treatment and regular quality assessments are necessary. The present work aimed to study the performance of the conventional water treatment of a water treatment plant (CWT) located in the northwest of the State of Rio Grande do Sul, through the analysis of its operational processes and the quality of the water produced. Analyzes of physical, chemical and bacteriological parameters of the complete cycle treatment of the water from the superficial spring were carried out in the period of six months. Gross and treated water were collected from August to November 2017, all of which were carried out in CWT. The methodology used for bacteriological research was the fermentation method in multiple tubes of total coliforms. The methodologies used in the physical-chemical and microbiological analyzes were carried out according to the Standard Methods for the Examination of Water and Wastewater of the American Public Health Association (APHA). Most of the samples were in accordance with current legislation Portaria N ° 2,914 of 2011, which is the specific national legislation on the quality of drinking water, it is concluded that the conventional treatment of CWT public water supply is efficient and important as a public health measure. The results showed that, although the bacterial contamination of the surface after the conventional treatment, it was obtained the potability of the same. The microbiological control of water is essential for the transmission of bacteria, among them, total coliforms, protozoa, viruses and fungi that cause various diseases such as diarrhea, dysentery, hepatitis, cholera, among other serious diseases. The result of this work reveals, through microbiological analysis, that the treated water samples were presented for human consumption.