Diseño de un Sistema Complementario para el Tratamiento de Aguas Residuales de origen doméstico mediante la aplicación de un Proceso de Oxidación Avanzada y un sistema de recuperación de biogás

Abstract

The aim of this project was to design a complementary system for domestic wastewater treatment using an Advanced Oxidation Process and a biogas recovery system. The complementary system for wastewater treatment has five stages: preparation and formation of the complex Fe-EDTA, reaction, coagulation, sedimentation and neutralization. This system was designed for a maximum flow rate of 77.76 m3/day and occupies an approximate surface area of 556.54 m2. A discontinuous treatment process was considered, with a capacity of 8 batches of effluent per day in 2 treatment lines. The estimated cost of implementation is 218 389.95 USD and the monthly operating cost is 13 518.72 USD. The cost of treatment is 5.80 USD/m3 of effluent, with a cost-benefit ratio of 1.43. The biogas recovery system has five stages: collection and accumulation of biogas, purification, condensation, storage and energy generation. This system was designed for a maximum flow rate of 61.67 m3/day of biogas and occupies an approximate surface area of 387.50 m2. The estimated cost of implementation is 23 558.98 USD. The monthly operating cost is 180.26 USD, with an environmental cost-benefit that can be stated in terms of avoided emissions of methane and the use of biogas for energy generation.