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Ingeniería y Ciencia
versão impressa ISSN 1794-9165
Resumo
ESTRADA-ARRIAGA, Edson Baltazar; MIJAYLOVA NACHEVA, Petia e GARCIA-SANCHEZ, Liliana. Effect of Mixed Liquor Volatile Suspended Solids on Membrane Fouling During Short and long-term Operation of Membrane Bioreactor. ing.cienc. [online]. 2015, vol.11, n.21, pp.137-155. ISSN 1794-9165. https://doi.org/10.17230/ingciencia.11.21.7.
The aim of this study was to examine the impact of different Mixed Liquor Volatile Suspended Solids (MLVSS) concentrations on membrane fouling, in a submerged Membrane Bioreactor (MBR) at short and long-term MBR operation for wastewater treatment. Three laboratory-scale in a submerged MBR system were operated under critical flux, sub-critical flux, and an intermittent suction time and backwashing conditions. At short-term MBR operation with mixed liquors of 4,200 and 6,150 mg MLVSS L−1, the hydraulic resistance of membranes followed a same trajectory with averages of 5.0E+12 m−1, whereas for 7,940 mg MLVSS L−1, a high resistance of up to 1.7E+13 m−1 was obtained. The result showed that high biomass concentrations decreased to permeability due to a bio-layer formed in the membrane surface and high Extracellular Polymeric Substance (EPS).
Palavras-chave : membrane bioreactor; membrane fouling; volatile suspended solid; extracellular polymeric substances.