Biorreatores de membrana (BRM): um levantamento bibliográfico enfocando a aeração do sistema

Abstract

Although Brazil is the first country in the world in water availability, misuse and pollution have significantly compromising this feature. The high urban and industrial growth contributes to the generation of large environmental impacts, particularly affecting the quality and/or quantity of water resources. One of the systems considered promising in the treatment of wastewater reuse is aimed with the membrane bioreactor (MBR). The combination of aerobic biological reactors and/or anaerobic process with membrane separation spotlighted on the world stage. The MBR provides a high quality physicochemical and microbiological treated effluent. One major barrier to the use of this technology is the propensity of membranes to embedded. The distribution of MBR requires efforts aimed to contributing to the elimination of economic, technological and social barriers. To solve such problems is essential to better understand the behavior of the aeration in the MBR. This study aims to evaluate the effect of aeration on minimizing fouling based on literature data. A literary analysis on this subject was performed and the main considerations were raised. Graphs and tables were designed to the schematic view of the information. As shown, the aeration rate plays an important role in system performance and presents biological purposes. It is also responsible for the increased operating costs due to increased energy consumption. However, there is no consensus about the optimal aeration. Thus, this work becomes relevant, since it provides a comprehensive understanding about the BRM as well as the interference of the aeration in the system.