The effect of fine bubble aeration intensity on membrane bioreactor sludge characteristics and fouling

Temmerman, Leen De; Maere, Thomas; Temmink, Hardy; Zwijnenburg, A.

doi:10.1016/j.watres.2015.02.057

Cited by 51 publications

(18 citation statements)

References 33 publications

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“…In contrast, studies have shown that excess scouring air encourages the fouling mechanism in the membrane [124,[164][165][166]. This is because as the activated sludge prolong, smaller organic aggregates get agglomerated to form bigger bio-flocs which may easily crumble by the scouring air.…”

Section: Aerobic Processes In Mbr (Aermbr)mentioning

confidence: 99%

“…This is because as the activated sludge prolong, smaller organic aggregates get agglomerated to form bigger bio-flocs which may easily crumble by the scouring air. This resulted in the generation of more bio foulants, colloids and particulates with a range of smaller sizes [114,164,165,167]. Eventually, the disintegrated flocs settle on the membrane to initiate pores blockage as well as the formation of the dense cake layer, thus increase in hydraulic resistance [168,169].…”

Section: Aerobic Processes In Mbr (Aermbr)mentioning

confidence: 99%

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Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Abdulsalam

Man

Idris

et al. 2018

Water

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Over the years, different types of alternative technologies have been developed and used for palm oil mill effluent (POME) treatment. Specifically, membrane bioreactor (MBR) has been employed to relegate pollutants contained in POME under different operating conditions, and the technology was found to be promising. The major challenge impeding the wider application of this technology is membrane fouling, which usually attracts high operating energy and running cost. In this regard, novel methods of mitigating membrane fouling through the treatment processes have been developed. Therefore, this review article specifically focuses on the recent treatment processes of POME using MBR, with particular emphasis on innovative processes conditions such as aerobic, anaerobic, and hybrid processing as well as their performance in relation to fouling minimization. Furthermore, the effects of sonication and thermophilic and mesophilic conditions on membrane blockage were critically reviewed. The types of foulants and fouling mechanism as influenced by different operating conditions were also analyzed censoriously.

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Section: Aerobic Processes In Mbr (Aermbr)mentioning

confidence: 99%

Section: Aerobic Processes In Mbr (Aermbr)mentioning

confidence: 99%

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Abdulsalam

Man

Idris

et al. 2018

Water

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“…The advantage offered by MBRs over conventional treatment are well known, however, one of the main drawbacks regarding the widespread use of MBR is the amelioration of membrane fouling at reasonable energy input . The two‐phase gas‐liquid flow introduced by air bubbling is a technically effective strategy for oxygen transfer, mass‐transfer enhancement of those components that would foul the membrane and fouling mitigation in submerged flat sheet MBR systems …”

Section: Introductionmentioning

confidence: 99%

Novel aeration of a large‐scale flat sheet MBR: A CFD and experimental investigation

Wang

Field

2018

AIChE Journal

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Having previously established that the hydrodynamic effect introduced by slug bubbles is more effective and economic in fouling amelioration in flat sheet MBRs (FSMBR) than conventional bubbling, this work is focused on its implementation in a commercial FSMBR. The overall objective is to enhance the hydrodynamic effect on fouling control through the use of two‐stage large‐sized bubble development (coalescence and split). Computational Fluid Dynamics (CFD) was used to predict hydrodynamic features and substantial agreement was observed with experimental measurements. The critical height for bubble development space was determined to be circa 250 mm. Slug bubbles could be introduced into 14 channels, resulting in six‐fold stronger shear stress than that from single bubbles. Energy demand could be reduced by circa 50% compared with industry average usage and the shear stresses developed would, for most applications, be sufficient to ameliorate fouling. Furthermore, the specific air demand per permeate would be halved. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2721–2736, 2018

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“…Volumetric oxygen transfer rate (OTR) coefficient, k L a, is usually used for the description of oxygen source (Cockx et al, 2001). It is affected by many factors, such as configuration of bioreactor, surface tension, viscosity, temperature, and most importantly, the aeration condition including aeration intensity (Pittoors et al, 2014), aeration pattern (Capodici et al, 2015), bubble diameter and bubble shape (De Temmerman et al, 2015) and hydrodynamics (Braak et al, 2011). More than that, k L a is affected by the solution composition, biomass concentration and sludge rheological property in wastewater treatment systems (Pittoors et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

CFD simulation and optimization of membrane scouring and nitrogen removal for an airlift external circulation membrane bioreactor

Yang

Wei

Zheng

et al. 2016

Bioresource Technology

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The effect of fine bubble aeration intensity on membrane bioreactor sludge characteristics and fouling

Cited by 51 publications

References 33 publications

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Novel aeration of a large‐scale flat sheet MBR: A CFD and experimental investigation

CFD simulation and optimization of membrane scouring and nitrogen removal for an airlift external circulation membrane bioreactor

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