Influence of organic loading rate on membrane fouling in membrane separation activated sludge process
2000; Pergamon Press; Volume: 41; Issue: 10-11 Linguagem: Inglês
10.2166/wst.2000.0679
ISSN1996-9732
AutoresNoriyasu Nagaoka, Shin Kono, Shigeki Yamanishi, Akiko Miya,
Tópico(s)Graphene and Nanomaterials Applications
ResumoA 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.
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