Model assessment of the prevailing fouling mechanisms in a submerged membrane anaerobic reactor treating low-strength wastewater

•Three models were applied to identify the main fouling mechanisms in a UF membrane.•Surface fouling had the best fits for the blocking laws and combined models.•In all cases similar fits were obtained with both models when N2 bubbling was applied.•There are clear differences between filtration runs...

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Veröffentlicht in:Bioresource technology 2018-11, Vol.268, p.460-469
Hauptverfasser: Cerón-Vivas, Alexandra, Kalboussi, Nesrine, Morgan-Sagastume, Juan Manuel, Harmand, Jérôme, Noyola, Adalberto
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container_end_page 469
container_issue
container_start_page 460
container_title Bioresource technology
container_volume 268
creator Cerón-Vivas, Alexandra
Kalboussi, Nesrine
Morgan-Sagastume, Juan Manuel
Harmand, Jérôme
Noyola, Adalberto
description •Three models were applied to identify the main fouling mechanisms in a UF membrane.•Surface fouling had the best fits for the blocking laws and combined models.•In all cases similar fits were obtained with both models when N2 bubbling was applied.•There are clear differences between filtration runs with and without gas bubbling.•The resistance-in-series model identified a post-cake fouling mechanism. Three models (blocking laws, combined and resistance-in-series) were applied to identify the prevailing fouling mechanisms in a submerged membrane in an up-flow anaerobic sludge blanket reactor treating municipal wastewater. Experimental runs were carried out at lab-scale with filtration periods of 4 and 10 min, followed by relaxation periods of one minute with and without nitrogen bubbling. In all conditions excepting one (IF4R), the blocking laws model showed a predominance of cake formation. With the combined model, cake formation coupled with intermediate, standard and complete fouling had the better fits in all conditions, excepting IF4 and IF4R. When sewage was fed, both models pointed at intermediate fouling in the absence of gas bubbling. The resistance-in-series model identified the positive effect of gas bubbling and a post-cake fouling behavior, not shown by the other two models. This modeling approach could be applied for achieving longer filtration runs in submerged UF membranes.
doi_str_mv 10.1016/j.biortech.2018.08.017
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subjects Blocking laws model
Combined fouling model
Environmental Sciences
Fouling mechanism
Life Sciences
Resistance-in-series model
UASB
title Model assessment of the prevailing fouling mechanisms in a submerged membrane anaerobic reactor treating low-strength wastewater
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