Aplicação de sistema de lodo ativado em bateladas sequenciais para a remoção biológica de nitrogênio do esgoto de um condomínio residencial.

Abstract

With population growth and industrial development over the last few centuries, the volume of wastewater produced in large and small centers has grown exponentially, humanity is now focusing on the final destination and environmental damage that this increasing volume causes, in a short and a long term. On this reasoning,the treatment of wastewater appears as a more viable alternative and, as an effective alternative and at low cost, the biological treatment. This work presents the discussion of the assembly and operation of a sludge activated system in a sequential batch regime, in order to obtain satisfactory parameters for the removal of organic matter and nitrogen from municipal wastewater, more specifically from a residential condominium in Campina Grande. In this study, the operating conditions were calculated and checked for a system operating nitrification and denitrification in separate chambers by means of two reactors with capacity of 500L that were interconnected and, therefore, shared a recirculation flow, the balance of the system in the two zones and, with the aid of laboratory tests and theory, should be in the range between 250 and 280 L / h. It is concluded that for the equilibrium of the system the laboratorial monitoring of the ratio between nitrification and denitrification, its rates and volumes present in each reactor, as well as the correct automation of the phases of the system performed by timersis matter of fundamental importance. Finally, it is verified that the system operating for the assembly carried out presents favorable treatment potential for the removal of nitrogen and organic matter since it is monitored periodically and presents conditions for stabilization of the biomass.