PERFORMANCE OF SYSTEM FOR TREATMENT AND UTILIZATION OF DOMESTIC SEWAGE

The inadequacy of basic sanitation is the leading cause of disease and environmental pollution in the world. This study aimed to analyze the performance of a system for treating domestic sewage aiming to use effluent in a rural environment. The tests were carried out in experimental area of University Federal Rural Semiarid (UFERSA) in Mossoró-RN. The sewage treatment system consists of septic tank, inorganic filter and solar reactor. Physio-chemical and microbiological analysis were made on effluents collected in different points system. The results showed that the treatment provided significant removal of chemical and physical characteristics (turbidity, total coliform, fecal coliform, BOD, COD, suspended solids, phosphorus, grease and nitrate). The removals of BOD and COD values reached up to 88.33 and 81.40% respectively. With an exposure time of 12 hours were obtained removal up to 99.9999 and 99.99% in the population of total coliform and fecal coliform, respectively. To the safe use of treated effluent is necessary to increase the efficiency of removal of suspended solids from the sewage treatment system and time of exposure to sunlight in order to obtain a population level always less than 5 x 103 NMP 100 mL-1 when fertigation of crops.