Performance of auto compensating drippers with different effluents of domestic sewage

This study had the objective of evaluating the hydraulic performance of dripper Katif, brand Plastro Brazil, external type, auto compensating using effluent from three different treatments of domestic sewage. The experiment was conducted under field and laboratory conditions. The field test consisted in the evaluation of a drip irrigation system by uniformity tests which were conducted on three occasions. In the laboratory, the study aimed to compare the hydraulic performance of used emitters with a lot of new emitters in four pressure ranges: 100, 150, 200 and 250 kPa. The values were obtained for the Christiansen Uniformity Coefficient (CUC), Distribution Uniformity Coefficients (CUD), and of Manufacturer Variation Coefficient (CVf). The results showed that the use of domestic sewage treated with decant digester associated with a filter digester and a stabilization pond provided the best results in distribution uniformity and, in general, the continuous use of wastewater provided losses in the hydraulic performance of emitters.