Journal ArticleDOI
Membrane Fouling in Membrane Bioreactors for Wastewater Treatment
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TLDR
Establishing a general model to describe membrane fouling in such a process is made extremely difficult by the inherent heterogeneity of the biomass matrix, which is highly heterogeneous and includes living microorganisms.Abstract:
Membrane bioreactors (MBRs), in which membranes are applied to biological wastewater treatment for biomass separation, provide many advantages over conventional treatment. However, membrane fouling in MBRs restricts their widespread application because it reduces productivity and increases maintenance and operating costs. Recently much research and development has taken place to investigate, model, and control membrane fouling processes. However, unified and well-structured theories on membrane fouling are not currently available because of the complexity of the biomass matrix, which is highly heterogeneous and includes living microorganisms. Membrane fouling in MBR systems can be reversible (i.e., removable by physical washing) or irreversible (removable by chemical cleaning only), and can take place on the membrane surface or into the membrane pores. Although establishing a general model to describe membrane fouling in such a process is made extremely difficult by the inherent heterogeneity of the syste...read more
Citations
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Journal ArticleDOI
Fouling in membrane bioreactors used in wastewater treatment
TL;DR: In this paper, a review of more than 300 publications on membrane bioreactor fouling is presented, and the authors propose updated definitions of key parameters such as critical and sustainable flux, along with standard methods to determine and measure the different fractions of the biomass.
Journal ArticleDOI
Recent advances in membrane bioreactors (MBRs): membrane fouling and membrane material.
Fangang Meng,Fangang Meng,So-Ryong Chae,Anja Drews,Matthias Kraume,Hang-Sik Shin,Fenglin Yang +6 more
TL;DR: The fouling behaviour, fouling factors and fouling control strategies were discussed, and recent developments in membrane materials including low-cost filters, membrane modification and dynamic membranes were reviewed.
Journal ArticleDOI
A mini-review on membrane fouling
TL;DR: This mini-review paper identifies the major foulants and the principal membrane fouling mechanisms such as pore blocking, cake formation, concentration polarization, organic adsorption, inorganic precipitation and biological fouling.
Journal ArticleDOI
Water Purification by Membranes: The Role of Polymer Science
Geoffrey M. Geise,Hae-Seung Lee,Daniel J. Miller,Benny D. Freeman,James E. McGrath,Donald R Paul +5 more
TL;DR: In this paper, the authors summarized the nature of the global water problem and reviewed the state of the art of membrane technology and identified existing deficiencies of current membranes and the opportunities to resolve them with innovative polymer chemistry and physics.
Journal ArticleDOI
Membrane fouling in membrane bioreactors—Characterisation, contradictions, cause and cures
TL;DR: In this article, a review of membrane fouling in membrane bioreactors is presented, with a focus on recent discoveries and emerging innovative fouling mitigation strategies that might lead to more economical and robust MBR operation.
References
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Critical flux concept for microfiltration fouling
TL;DR: The concept of critical flux is introduced in this article to identify the critical flux and the desirability of starting filtration operations at a low flux, where a flux below which a decline of flux with time does not occur.
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The behavior of suspensions and macromolecular solutions in crossflow microfiltration
TL;DR: In this article, a review of microfiltration is presented, focusing on the formation of cakes, the behavior of suspension flows and particle transport in simple geometry ducts, and the formation and behavior of fouling layers including those resulting from macromolecules, colloids and particles.
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Surface properties of sludge and their role in bioflocculation and settleability
Bao-Qiang Liao,D.G. Allen,Ian G. Droppo,Gary G. Leppard,Gary G. Leppard,Steven N. Liss,Steven N. Liss +6 more
TL;DR: The results indicate that it is the surface properties, hydrophobicity, surface charge and composition of EPS, of sludge, rather than the quantity of EPS that govern bioflocculation, and in contrast, the EPS content is more important in controlling the settleability of sludges.
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Biofouling in membrane systems — A review☆
J.S. Baker,L.Y. Dudley +1 more
TL;DR: In this article, the causes and effects of obstinate biofilms in membrane elements are examined, and it is shown that biofouling is endemic within membrane systems, yet many systems operate satisfactorily even with a biofilm.
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Membrane filtration characteristics in membrane-coupled activated sludge system -- the effect of physiological states of activated sludge on membrane fouling
In-Soung Chang,Chung-Hak Lee +1 more
TL;DR: In this article, the effect of sludge physiology on membrane fouling was investigated in a membrane-coupled activated sludge (MCAS) system, where a series of ultrafiltrations were performed to assess the flux behaviors according to foaming potential, solids retention time (SRT), growth phase and nutrient condition of the active sludge.