The objective of this study was to evaluate the head losses in commercial tubes of zinc, galvanized iron and PVC, with different diameters, aiming to determinate correction factors for Hazen-Willams equation as a function of total solids in swine wastewater. The results showed that the head loss has a linear relation with the total solids of swine wastewater; the head losses estimated by partial and global correction factors showed mean overestimate and underestimate of 0.7 and 13%, respectively.
water reuse; irrigation; hydraulics
