Evaluation of drippers with use of wastewater from swimming and swine farming in different dilutions

Abstract

This article is an integral part of the first author's dissertation. The wastewater presents in their composition high organic load, high amount of suspended solids and variation in pH, which may provide risk of obstruction of emitters. The objective of this work was to evaluate the hydraulic performance of the surface drip irrigation system with the use of fish and pig farming wastewater in different dilutions. The experimental design was in randomized blocks, analyzed in a split plot scheme 2×4, with three replications. The treatments consisted of two sources of wastewater (fish and swine) diluted in four proportions of water supply, being: recommended dose of wastewater + 0, 25, 50 and 75% of its volume in water supply, totaling 24 experimental plots. Each plot consisted of four vessels, totaling 96 experimental units. After tabulating the flow data were performed the calculations of Uniformity of Christiansen (CUC) and Distribution (CUD), Relative Flow (RF), Coefficient of Variation (CV) and Degree of Clogging (DC). The use of the drip irrigation system operating with swine and fish-farming wastewater during 470 hours of operation does not compromise the uniformity of water distribution.