A Laboratory-scale experiment was conducted to investigate the influence of organic loading rate to a reactor on the bio fouling in a membrane separation activated sludge system. A flat-sheet-type membrane module was used and the change of the pressure and the filtration resistance were measured. Using synthetic substrate, TOC loading rate was set in the range between 0.3 g l–1 day–1 and 1.5g l–1 day–1. Also an experiment on the consolidation characteristics of sludge accumulated on membrane was conducted. A mathematical model was developed to simulate temporal changes of suction pressure, flux and filtration resistance considering accumulation, detachment and consolidation of bacterial extracellular polymers on the membrane surface. A reactor with higher loading rate showed sudden increase of trans-membrane pressure, while a reactor with lower loading rate showed delayed increase of the pressure. The experimental results were simulated well by the developed model.
Influence of organic loading rate on membrane fouling in membrane separation activated sludge process
N. Nagaoka, S. Kono, S. Yamanishi, A. Miya; Influence of organic loading rate on membrane fouling in membrane separation activated sludge process. Water Sci Technol 1 May 2000; 41 (10-11): 355–362. doi: https://doi.org/10.2166/wst.2000.0679
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