Avaliação do desempenho de um sistema de irrigação localizada utilizando águas residuárias.

Abstract

In this research, the performance of the experimental system of irrigation located type microsprinkler using four treatments : T l - water supplies, T2 - wastewater treated from UASB anaerobic reactor using sand filter and screen filter, T3 - wastewater treated from polishing pond using sand filter and screen filter and T4- - wastewater treated from polishing pond using disk filter. The experimental system was built at PROSAB (Programa de Saneamento Basieo), in Campina Grande City, Stat of Paraiba. The tests sought the determination of the following parameters: manufacturer's coefficient of variation, coefficient of use and discharge pressure head equation. That were evaluated the following parameters physicochemieal and biological: pH, biochemical oxygen demand (BOD), chemical oxygem demand (COD), total solids (TS), suspended solids (SS), electrical conductivity (EC), turbidity, alcalinity, chlorophyll a and algae. Its performance system was evaluated upon the ratios of reduction from parameters: total solids, suspended solids, BOD, COD and quantification and identification of algae. The average emitter discharge for a working pressure of ISOkPa with the treatment T l was 57,5 Lh"1 and after the treatments T2, T3 and T4 the average emitter discharge decreased for 54,67 Lh"1. The results showed that the use of wastewater caused a small reduction in the emitter discharge rate and a increase in the coefficient of variation showed one reduction in the emission uniformity. It was verified that with the use of sand filter, screen filter and disk fillter caused small reduction in the content organic matter and algae.