Evaluation of a novel physical cleaning strategy based on HF membrane rotation during the backwashing/relaxation phases for anaerobic submerged MBR

Ruigómez, Ignacio; Cabrera, E; Guerra, Sonia Sevilla; Gómez, Luis Enrique Rodríguez; Vera, Luisa

doi:10.1016/j.memsci.2016.12.042

Cited by 60 publications

(17 citation statements)

References 42 publications

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“…Fiber spacing and looseness were found to be important parameters to improve the benefits of vibration with respect to the turbulence kinetic energy and eddy length scale [226]. A recent study investigated rotating instead of vibrating the HF membranes and found membrane rotation to be more effective than gas scouring [227]. Figure 4 shows that both higher amplitudes and higher frequencies for longitudinal vibration contribute towards fouling mitigation, with an observed reduction in the fouling rate by as much as 90% [23].…”

Section: Vibrationsmentioning

confidence: 96%

“…Fiber spacing and looseness were found to be important parameters to improve the benefits of vibration with respect to the turbulence kinetic energy and eddy length scale [226]. A recent study investigated rotating instead of vibrating the HF membranes and found membrane rotation to be more effective than gas scouring [227]. Appl 10 Hz) tended to reduce the critical flux.…”

Section: Vibrationsmentioning

confidence: 99%

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The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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Section: Vibrationsmentioning

confidence: 96%

“…Fiber spacing and looseness were found to be important parameters to improve the benefits of vibration with respect to the turbulence kinetic energy and eddy length scale [226]. A recent study investigated rotating instead of vibrating the HF membranes and found membrane rotation to be more effective than gas scouring [227]. Appl 10 Hz) tended to reduce the critical flux.…”

Section: Vibrationsmentioning

confidence: 99%

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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“…An understanding of fouling mechanisms and foulant composition is important to effectively control high-rate AnMBR operation. Many researchers have studied fouling prevention strategies, such as air sparging [ 9 ] and filtration mode (relaxation) [ 10 , 11 ], among others. Fouling in a membrane reactor unit can be categorized as either reversible or irreversible.…”

Section: Introductionmentioning

confidence: 99%

“…Reversible foulants include biomass, suspended solids, and inorganic precipitates, which form a cake layer attached at the membrane surface. Reversible fouling can be prevented by controlling hydrodynamic conditions or it can be removed by physical cleaning [ 11 , 12 ]. Irreversible foulants, on the other hand, are produced by microbial products, such as extracellular polymeric substances (EPS) forming a gel layer, and soluble microbial products (SMP) accumulating on the cake layer or in the membrane pores [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…Irreversible foulants, on the other hand, are produced by microbial products, such as extracellular polymeric substances (EPS) forming a gel layer, and soluble microbial products (SMP) accumulating on the cake layer or in the membrane pores [ 12 , 13 ]. Irreversible fouling can be removed by chemical cleaning [ 11 ]. A substantial amount of research has evaluated fouling behavior in AnMBR, with different operational conditions affecting cake layer formation, EPS and SMP, and inorganic precipitates [ 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Fouling Behavior in a High-Rate Anaerobic Submerged Membrane Bioreactor (AnMBR) for Palm Oil Mill Effluent (POME) Treatment

et al. 2021

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The characteristics of foulant in the cake layer and bulk suspended solids of a 10 L submerged anaerobic membrane bioreactor (AnMBR) used for treatment of palm oil mill effluent (POME) were investigated in this study. Three different organic loading rates (OLRs) were applied with prolonged sludge retention time throughout a long operation time (270 days). The organic foulant was characterized by biomass concentration and concentration of extracellular polymeric substances (EPS). The thicknesses of the cake layer and foulant were analyzed by confocal laser scanning microscopy and Fourier transform infrared spectroscopy. The membrane morphology and inorganic elements were analyzed by field emission scanning electron microscope coupled with energy dispersive X-ray spectrometer. Roughness of membrane was analyzed by atomic force microscopy. The results showed that the formation and accumulation of protein EPS in the cake layer was the key contributor to most of the fouling. The transmembrane pressure evolution showed that attachment, adsorption, and entrapment of protein EPS occurred in the membrane pores. In addition, the hydrophilic charge of proteins and polysaccharides influenced the adsorption mechanism. The composition of the feed (including hydroxyl group and fatty acid compounds) and microbial metabolic products (protein) significantly affected membrane fouling in the high-rate operation.

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Membrane Technologies for Sustainable and Eco-Friendly Microbial Energy Production

Chang

Zhong

Quan

et al. 2020

Environmental Chemistry for a Sustainable World

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Evaluation of a novel physical cleaning strategy based on HF membrane rotation during the backwashing/relaxation phases for anaerobic submerged MBR

Cited by 60 publications

References 42 publications

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

Fouling Behavior in a High-Rate Anaerobic Submerged Membrane Bioreactor (AnMBR) for Palm Oil Mill Effluent (POME) Treatment

Membrane Technologies for Sustainable and Eco-Friendly Microbial Energy Production

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