Effect of Mixed Liquor Volatile Suspended Solids on Membrane Fouling During Short and long-term Operation of Membrane Bioreactor

Ingeniería y Ciencia

Mijaylova Nacheva, Petia²  García-Sánchez, Liliana¹  Estrada-Arriaga, Edson Baltazar² 

[1] Universidad Nacional Autónoma de México, Morelos, México;Instituto Mexicano de Tecnología del Agua, Morelos, México

关键词: membrane bioreactor;    membrane fouling;    volatile suspended solid;    extracellular polymeric substancesResumen El objetivo del estudio fue examinar el impacto de diferentes concentraciones de só;    lidos suspendidos volá;    tiles del licor mezclado en el ensuciamiento de las membranas en un bio-reactor con membranas sumergidas (BRMS) en periodos cortos y largos de operació;    n durante el tratamiento del agua residual;   

DOI  :  10.17230/ingciencia.11.21.7

学科分类：工程和技术（综合）

来源: Universidad E A F I T

【 摘 要 】

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).

【 授权许可】

Unknown