Dynamic multidimensional modelling of submerged membrane bioreactor fouling

Boyle-Gotla, A.; Jensen, Paul D.; Yap, Shao Dong; Pidou, Marc; Wang, Yuan; Batstone, Damien J.

doi:10.1016/j.memsci.2014.05.028

Cited by 40 publications

(18 citation statements)

References 24 publications

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“…Figure 6 demonstrates no observable increase in TMP over time, indicating that membrane fouling is sustainable and below critical flux. Gas sparging provides surface shear and therefore controls particle deposition [22]. At Site A, there were two notable exceptions with fouling events on Day 30 and Day 170, these fouling events were represented by a rapid increase in TMP ( Figure 6) and coincided with failure of the biogas recirculation pump and in both occurrences, the gas sparging rate reduced from 35 L.min -1 to approximately 10 L.min -1 .…”

Section: Membrane Performance and Foulingmentioning

confidence: 98%

“…The accumulation of particulates in the AnMBR vessel can increase membrane fouling due to cake accumulation [22]. Membrane fouling rate, and the ability to operate at an effective critical flux (the flux below at which the system can be operated without periodic cake dispersal) is the primary factor influencing economic feasibility of membrane processes [23], with membrane costs in the range of 72% of capital investment [24].…”

Section: Introductionmentioning

confidence: 99%

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Anaerobic membrane bioreactors enable high rate treatment of slaughterhouse wastewater

Jensen

Yap

Boyle-Gotla

et al. 2015

Biochemical Engineering Journal

Self Cite

103

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membrane bioreactors enable high rate treatment of slaughterhouse wastewater, Biochemical Engineering Journal http://dx. Highlights-AnMBRs are an effective technology for treatment of slaughterhouse wastewater -COD removal was consistently over 95% and was independent of OLR and HRT -Organic loading limit of 3-3.5 gCOD.L -1 d -1 was imposed by active biomass inventory -Biomass inventory in the AnMBR was limited to 40 g.L -1 (TS) to manage fouling ABSTRACT Anaerobic Membrane Bioreactors (AnMBRs) enable high space loading by retaining solids selectively through microfiltration membranes. For organic industrial wastewaters, this offers an alternative to lagoons and granule based high-rate anaerobic treatment due to excellent effluent quality, high tolerance to load variations, and ability to produce a solids free effluent for the purposes of reuse. While there has been extensive work on low-strength and low solids effluent, there has been limited application in high-solids, high fats systems such as slaughterhouse wastewater, which are a key application. A 200L AnMBR pilot plant operated at 2 Australian cattle slaughterhouses consistently removed over 95% of chemical oxygen demand (COD) from the wastewater. Virtually all degradable COD was converted to biogas, 78-90% of nitrogen and 74% of phosphorus in the wastewater were released to the treated permeate as ammonia and phosphate respectively; which would enable subsequent nutrient capture. The mass loading rate limit of 3-3.5 gCOD.L -1 d -1 is imposed by the active biomass inventory, with this in turn limited to 40 g.L -1 (TS) by the need to manage membrane fouling control.

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Section: Membrane Performance and Foulingmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Anaerobic membrane bioreactors enable high rate treatment of slaughterhouse wastewater

Jensen

Yap

Boyle-Gotla

et al. 2015

Biochemical Engineering Journal

Self Cite

103

View full text Add to dashboard Cite

show abstract

“…Fouling, which results in decreased hydraulic performance, has limited the widespread application of membrane technology [23,61]. Membrane fouling is a complex problem that is affected by a range of factors, including operational conditions, influent characteristics, membrane and biomass properties and their mutual combination [10,12,62,63]. As a result, a wide range of issues related to membrane fouling have been the subject of intensive study.…”

Section: Disadvantages and Limitations Of Anmbrmentioning

confidence: 99%

Anaerobic membrane bioreactors—a mini review with emphasis on industrial wastewater treatment: applications, limitations and perspectives

Dvořák

Gómez

Dolina

et al. 2015

Desalination and Water Treatment

101

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Anaerobic membrane bioreactors (AnMBRs) are increasingly being used in industrial wastewater treatment as the technology represents a cost-effective alternative to that based on aerobic processes. Not only AnMBRs are highly efficient in reducing chemical oxygen demand but the organic matter removed is transformed into a useful energy source-biogas. AnMBRs produce effluent that is free of solids and pathogens and rich in nutrients, while occupying a small footprint. As the membrane retains biomass, AnMBRs enhance performance when dealing with inhibitory or toxic substrates, typical of industrial wastewaters. Some drawbacks remain, however, including membrane fouling and its associated effects as well as poor efficiency at lower temperature (AnMBRs are usually operated at mesophilic or thermophilic conditions). Further research is needed on lowering hydraulic retention time, removal of nutrients, removal of specific micro-pollutants, establishing quantitative mass and energy/economic balances and inclusion of efficient dissolved methane recovery. In this mini review, the applications, limitations and perspectives of AnMBRs are summarized and evaluated with an emphasis on industrial wastewater treatment. Moreover, the AnMBR is compared with other wastewater treatment technologies presently available.

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“…The non-Newtonian nature of activated sludge flows [38] is not considered in these cases. The works [13], [17], and [39] should be mentioned as exceptions as they simulate two-phase flows in SMBRs with mixed liquor as a non-Newtonian fluid, using a Bingham [13] and Ostwald-de Waele/power law equation [17,39]. Following this trend, rheological tests were carried out to determine the best model available in Fluent that matched the mixed-liquor behavior and the parameters required as input for this model.…”

Section: Simulation Of Mixed-liquor Behaviormentioning

confidence: 99%

Impact of Aeration on Mixed Liquor in Submerged‐Membrane Bioreactors for Wastewater Treatment

et al. 2017

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In submerged-membrane bioreactors (SMBRs) for wastewater treatment, aeration with coarse bubbles is applied to limit fouling. The understanding of the different mechanisms between aeration and fouling helps to manage the aeration policy. The impact of aeration (macro scale) on shear stress and mixed-liquor properties (local scale) is evaluated. Experimental characterization of gas-liquid flow in membrane modules, computational fluid dynamics simulation, and controlled breakdown of SMBR mixed-liquor samples are reported. Mean bubble velocities were significantly lower in mixed liquor than in water and the shear stress was one order of magnitude higher in mixed liquor than in water. The floc size decreased and soluble protein concentrations increased with higher shear stress values. Considering the known impacts of these mixed-liquor properties on fouling, the obtained local results explain stronger fouling when coarse bubble aeration increases.

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Dynamic multidimensional modelling of submerged membrane bioreactor fouling

Cited by 40 publications

References 24 publications

Anaerobic membrane bioreactors enable high rate treatment of slaughterhouse wastewater

Anaerobic membrane bioreactors enable high rate treatment of slaughterhouse wastewater

Anaerobic membrane bioreactors—a mini review with emphasis on industrial wastewater treatment: applications, limitations and perspectives

Impact of Aeration on Mixed Liquor in Submerged‐Membrane Bioreactors for Wastewater Treatment

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