SEGUIMIENTO DE UN SISTEMA COMBINADO DE TRATAMIENTO DE LÍQUIDOS CLOACALES CON UN REACTOR UASB Y LAGUNAS DE ESTABILIZACIÓN

The behavior of an anaerobicaerobic Combined System for sewage treatment, pilot plant size, was studied for an operating period of nearly 800 days. The system, made up by one UASB reactor and stabilization ponds in series, was compared with another system of two UASB reactors and ponds previously studied, measuring the removal of organic matter (as % of removed COD) of the whole system and its components. In the UASB Reactor the average COD removal was nearly 72% and average COD effluent concentration was 100,0 mg /L, while in the whole Combined System COD removal was 73% during all the operating period. The Combined System UASB ReactorStabilization Ponds constitutes an attractive option for sewage treatment in subtropical regions