Utilização de biorreator anaeróbio de membrana dinâmica no tratamento de esgoto doméstico para uso agrícola

Abstract

Recently, Dynamic Membrane Anaerobic Bioreactor technology has been an approach taken as a promising alternative to solve the problems encountered in Conventional Membrane Anaerobic Bioreactor processes due to factors such as low membrane module cost, lower energy cost, and easier fouling control. This study investigated the use of a dynamic membrane anaerobic bioreactor for the treatment of domestic wastewater, evaluating the potential for removal egg from helminths to produce an effluent for agricultural reuse. The experimental system was operated at the Experimental Station of Biological Treatments of Sanitary Sewage (EXTRABES) in Campina Grande, Paraíba. The dynamic membrane was developed in an outer membrane module under a polyethylene mesh with an average pore size of 89 µm, the reactor was operated under an 8 hour TDH. The system provided a satisfactory performance, producing an effluent with an average turbidity of 120.8 NTU, reaching an average removal efficiency of 60%. The use of the dynamic membrane also provided a COD and helminth egg removal efficiency of 56% and 94.4%, respectively. As for the removal of phosphorus, the system showed promising results with an efficiency of 37.4%. Transmembrane pressure remained low throughout the production process, between 8.7 and 18.3 kPa.