Avaliação da eficiência na remoção de turbidez usando o Sulfato de Alumínio [Al2 (SO4 )3.10H2O]: caso de estudo: ETA-Mutua/FIPAG-Beira

Abstract

The objective of producing good quality water must be achieved at the lowest possible cost, whether in the construction and maintenance of the units or in the use of chemical products. Within this context, the present work aims to evaluate the efficiency in the turbidity removal of the Mutua treatment plant of FIPAG in the city of Beira using aluminum sulfate as the main coagulant for the formation of flakes, comforting the turbidity values ​​obtained with the values ​​recommended by the regulation on the quality of water for human consumption approved by the Ministry of Health in its Ministerial Diploma n° 180 of 15 September 2004. The development of this work consisted of the analysis of some physicochemical parameters, mainly of turbidity, carried out in the water withdrawn from the capture source, between the treatment processes and after the treatment. In a detailed way, the removal of turbidity levels consisted of the application of a coagulant (in this case aluminum sulfate) for the formation of flakes and an adjunct to the pH correction and weight increase of the flakes, later a sedimentation that will occur in the decanters and subsequently a filtration. The analyzes carried out on raw water (surface water) clearly showed that the source of capture has high turbidity levels, reaching approximately 84 NTU. The results obtained after the treatment showed an average efficiency of removal of turbidity contents of about 82.54%. Despite the efficiency observed in the treatment plant being at a level of approximately 83%, the turbidity levels found in the treated water are still outside the standards recommended by MISAU (TRADUÇÃO NOSSA)