Avaliação comparativa de agentes coagulantes químico e natural no processo de coagulação de águas de cisterna no município de Sumé-PB.

Abstract

The objective of the present work was to compare different forms of application of the Moringa oleifera seed in the clarification of water from cisterns in the municipality of Sumé, Paraíba. The objective is also to compare the efficiency of the natural coagulant in relation to the chemical coagulant aluminum sulfate. Aliquots of 1.0 L of effluent were used to perform the clarification tests, with aluminum sulfate and Moringa oleifera seeds sprayed as coagulants, in particulate forms and in solution. Factorial planning 22 was applied with three repetitions in the central point, to verify the influence of the treatment time and the amount of coagulants on the turbidity, pH and electrical conductivity of the samples. The results obtained allowed to verify a reduction in turbidity of up to 70%, when applying the natural coagulant in powder, and of 86% for the chemical coagulant in powder. For the conditions studied, it is possible to affirm that moringa seeds can be applied as a coagulant in the treatment of cistern water, reducing the turbidity levels, with the advantage of being a natural product of low cost and without promoting significant changes in the pH and electrical conductivity of the samples.