lean water was applied in the irrigation trials from an artesian well, installed near the studied area. The effluent was obtained from the last facultative pond, and this part of the treatment system was carried out by the agroindustry. Thus, the effluent was taken to the irrigation systems by dripping a CV 5 PPM 2900 pump AMP 15-85 220-330 VOLTS, installed near the facultative pond. Constitution of treatments can be seen on Table 1, while physicochemical effluents characterizations from cassava processing in the first and second collecting year are on Table 2.