PERFORMANCE EVALUATION OF SYSTEM FOR TREATMENT AND UTILIZATION OF GREY

This study aimed to evaluate the performance of graywater treatment system, aiming to use effluent in a rural environment. The tests were carried out in the field of University Federal Rural Semiarid (UFERSA) in Mossoró-RN. The gray water treatment system is comprised of grease trap, anaerobic tank, anaerobic filter, wetland and solar reactor. Physicochemical and microbiological analysis were made on effluents collected in points different system. The results showed that significant removals of turbidity, fecal coliform, biochemical oxygen demand, chemical oxygen demand, total solids, suspended solids, phosphorus and grease were obtained on system. The average solar radiation of 29.33 MJ m-2 d-1 and exposure time of 12 hours promoted removal up to 99.99 and 99.98% in the population of total coliform and fecal coliform. For agricultural use for agricultural use it is recommended that the treated effluent is applied with subsurface drip irrigation system, which minimizes environmental hazards and contamination of rural population.