Impact of permeate flux and gas sparging rate on membrane performance and process economics of granular anaerobic membrane bioreactors

Vinardell, Sergi; Sanchez, Lucie; Astals, Sergi; Mata‐Alvarez, J.; Dosta, J.; Héran, Marc; Lesage, Geoffroy

doi:10.1016/j.scitotenv.2022.153907

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…In other terms, efficient control consists to propose functions

and

depending on the intensity of gas sparging (parameter control). A first simple form of

and

which is already used in the literature is

and

, which represent quantities of

and

detached by shear forces caused by membrane scouring, where

and

depend on the intensity of injected bubbles used to detach fouling [ 2 , 44 , 45 , 46 ]. A higher aeration intensity can have a positive effect on cake layer removal by shear force and thus improves the membrane permeability [ 47 ].…”

Section: Discussion Open Questions and Perspectives On The Process Co...mentioning

confidence: 99%

Coupling a Simple and Generic Membrane Fouling Model with Biological Dynamics: Application to the Modeling of an Anaerobic Membrane BioReactor (AnMBR)

Benyahia,

Charfi,

Lesage

et al. 2024

Membranes

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A simple model is developed for membrane fouling, taking into account two main fouling phenomena: cake formation, due to attached solids on the membrane surface, and pore clogging, due to retained compounds inside the pores. The model is coupled with a simple anaerobic digestion model for describing the dynamics of an anaerobic membrane bioreactor (AnMBR). In simulations, we investigate its qualitative behavior: it is shown that the model exhibits satisfying properties in terms of a flux decrease due to membrane fouling. Comparing simulation and experimental data, the model is shown to predict quite well the dynamics of an AnMBR. The simulated flux best fits the experimental flux with a correlation coefficient r2=0.968 for the calibration data set and r2=0.938 for the validation data set. General discussions are given on possible control strategies to limit fouling and optimize the flux production. We show in simulations that these strategies allow one to increase the mean production flux to 33 L/(h·m2),whereas without control, it was 18 L/(h·m2).

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“…In other terms, efficient control consists to propose functions

and

depending on the intensity of gas sparging (parameter control). A first simple form of

and

which is already used in the literature is

and

, which represent quantities of

and

detached by shear forces caused by membrane scouring, where

and

Section: Discussion Open Questions and Perspectives On The Process Co...mentioning

confidence: 99%

Coupling a Simple and Generic Membrane Fouling Model with Biological Dynamics: Application to the Modeling of an Anaerobic Membrane BioReactor (AnMBR)

Benyahia,

Charfi,

Lesage

et al. 2024

Membranes

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“…Similarly, Wang et al [17] investig the effect of intermi ent stripping of the membrane surface with nitrogen gas (provid The effect of scouring the membrane surface with gas on membrane fouling has been investigated in the literature. Vinardell et al [16] studied the effect of specific nitrogen gas flow rates varying between 0.25 and 2.0 m 3 /m 2 •h on membrane fouling at membrane fluxes ranging from 5 to 20 L/m 2 •h in a granular anaerobic membrane bioreactor. Their study found that membrane fouling depended on both the membrane flux and the specific gas flow rate.…”

Section: The Effect Of Headspace Gas Circulation On Membrane Foulingmentioning

confidence: 99%

“…The most widely used method to reduce membrane fouling is to scour the membrane surface with a gas [ 16 ]. This is valid for both aerobic and anaerobic membrane bioreactors [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor

Kayaalp

2023

Membranes

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Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based autotrophic denitrification with membrane bioreactors (MBRs) enabled almost 100% utilization of hydrogen, the technology still needs to be improved to better utilize its advantages. This study investigated the anoxic treatment of both synthetic and real drainage waters using hydrogen gas in a recently developed membrane bioreactor configuration, a venturi-integrated submerged membrane bioreactor, for the first time. The study examined the effects of the inflow nitrate concentration, and the use of a venturi device on the removal efficiency, as well as the effects of the presence of headspace gas circulation and circulation rate on membrane fouling. The study found that using the headspace gas circulation through a venturi device did not significantly affect the treatment efficiency, and in both cases, a removal efficiency of over 90% was achieved. When the inlet NO3−–N concentration was increased from 50 mg/L to 100 mg/L, the maximum removal efficiency decreased from 98% to 92%. It was observed that the most significant effect of the headspace gas circulation was on the membrane fouling. When the headspace gas was not circulated, the average membrane chemical washing period was 5 days. However, with headspace gas circulation, the membrane washing period increased to an average of 12 days. The study found that the headspace gas circulation method significantly affected membrane fouling. When the upper phase was circulated with a peristaltic pump instead of a venturi device, the membrane washing period decreased to one day. The study calculated the maximum hydrogen utilization efficiency to be approximately 96%.

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“…Based on the most common MBR fouling mitigation strategy, some studies have investigated different permeate fluxes (from 5 to 20 L.m -2 .h -1 (LMH)) and specific gas demand (SGD) (0.1 -2.0 m 3 .m -2 .h -1 ) to identify the best operating and hydrodynamic conditions for G-AnMBR to maintain high membrane permeability with low energy requirements and treatment costs [16,17]. Vinardell et al (2022) stated that operating at moderate fluxes and gas sparging rates (J20 = 7.8 LMH; SGD = 0.5 m 3 .m -2 .h -1 ) could be the most favourable membrane fouling control strategy in G-AnMBR and balance process productivity and process economics. Wang et al (2018a) tested continuous and intermittent gas sparging regimes and filtration cycles and stated that shear rate, gas sparging frequency and filtration cycle length are of high importance for delivering sustained membrane filtration.…”

Section: Introductionmentioning

confidence: 99%

Revealing the role of supernatant and granular sludge fractions on granular anaerobic membrane bioreactor fouling

Sanchez

Lesage

Demiral

et al. 2022

Journal of Water Process Engineering

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Impact of permeate flux and gas sparging rate on membrane performance and process economics of granular anaerobic membrane bioreactors

Cited by 9 publications

References 42 publications

Coupling a Simple and Generic Membrane Fouling Model with Biological Dynamics: Application to the Modeling of an Anaerobic Membrane BioReactor (AnMBR)

Coupling a Simple and Generic Membrane Fouling Model with Biological Dynamics: Application to the Modeling of an Anaerobic Membrane BioReactor (AnMBR)

Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor

Revealing the role of supernatant and granular sludge fractions on granular anaerobic membrane bioreactor fouling

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