Evaluation of the application of a membrane bioreactor in sequential batches in the treatment of domestic sewage
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Abstract
The membrane bioreactor system (MBR) has been gaining prominence in recent years compared to traditional domestic effluent treatment systems, as restrictions are increasingly greater due to its release into water bodies. Therefore, the present study aimed to evaluate the application, on a pilot scale, of a sequential batch membrane bioreactor (MBR-SB) in the treatment of domestic sewage. Reactor performance was evaluated based on the removal of parameters: soluble chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia nitrogen, soluble phosphorus, apparent color and turbidity. At the same time, analyzes related to membrane fouling processes were evaluated in the reactor: soluble microbial products (SMP) and extracellular polymeric substances (EPS) in terms of proteins and polysaccharides, as well as transmembrane pressure (TMP). MBR-SB showed significant efficiencies in removing CODs, true color and turbidity, being 94%, 93% and 99%, respectively. The values of SMP, EPS, CODs significantly correlated with the increase in PTM, however, with a low clogging speed. In conclusion, the use of MBR-SB presents a promising approach to mitigate the environmental impacts associated with domestic sewage.
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