Biofouling in an anaerobic membrane bioreactor treating municipal sewage

Herrera‐Robledo, Miguel; Cid-León, D.M.; Morgan-Sagastume, Juan Manuel; Noyola, A.

doi:10.1016/j.seppur.2011.06.041

Cited by 43 publications

(21 citation statements)

References 36 publications

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“…Fouling and biofouling are, in fact, major drawbacks in membrane operations, which cause a rapid decline in membrane performances and in membrane durability [14][15][16]. Many strategies have been applied so far in order to control the fouling, such as: reducing the flux, increasing the aeration rate, back-flushing the membrane, using physical or chemical cleanings [17].…”

Section: Introductionmentioning

confidence: 99%

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Galiano

Figoli

Deowan

et al. 2015

Journal of Membrane Science

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a b s t r a c tAn innovative hydrophilic and anti-fouling coating material for application in membrane technology for wastewater treatment has been developed by polymerization of a polymerizable bicontinuous microemulsion (PBM) and used for surface modification of a commercial flat polyethersulfone (PES) membrane. The novel nanostructured coating has been produced using acryloyloxyundecyltriethylammonium bromide (AUTEAB) as a co-polymerizable surfactant, obtained through a synthetic method characterized by a lower cost and a higher reproducibility compared to other known polymerizable surfactants. The novel composite membranes have been characterized and compared with the uncoated PES membranes. Coated membranes resulted in a smoother surface and a higher hydrophilicity with respect to the uncoated ones, and showed a particular nano-size channel-like morphology making them highly resistant to the fouling phenomenon. The covalent anchorage of the surfactant on the membrane surface ensured the embedment of the molecule in the polymeric matrix avoiding its leaching and also leading the coated membranes to have significant antimicrobial activity, which is very important for reducing the biofouling phenomenon.All these aspects make the tailored coating material an ideal and efficient coating for modifications of commercial membrane surfaces, to be used in membrane processes in wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Galiano

Figoli

Deowan

et al. 2015

Journal of Membrane Science

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“…However, membrane fouling, which will increase filtration resistance and energy consumption, has highly hampered the widespread use of this technology [1,[3][4][5]. Therefore, it is of essential importance to investigate causes, characteristics and mechanisms of fouling for membrane fouling mitigation in MBRs [1,6,7].…”

mentioning

confidence: 99%

Membrane fouling in a submerged membrane bioreactor: Impacts of floc size

Shen

Qian

Chen

et al. 2015

Chemical Engineering Journal

205

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“…Herrera -Robledo et al (2011), using a similar arrangement, found that a cleaning procedure using chlorine (NaClO at 300 mg/L, for 30 min) removed only 13% of the fouling layer, hypothesizing that the remnant fouling layer apparently was in part formed by biologically-induced mineralization materials, synthesized in part as a response to the cleaning procedure. The resultant biomineralized deposits were an important structural component within the remnant cake layer and may be the basis of irreversible membrane fouling.…”

Section: Flux Behaviourmentioning

confidence: 97%

“…In particular, the identification of the fouling mechanisms and the materials associated with pore obstruction and fouling layer formation are important research areas in AnMBR (Meng et al, 2009;Herrera-Robledo et al, 2011;Lin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Fouling layer characterization and pore-blocking mechanisms in an UF membrane externally coupled to a UASB reactor

Peláez¹,

Morgan-Sagastume²,

Noyola³

2017

WSA

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A pilot-scale UASB reactor coupled with an external ultrafiltration (UF) membrane was operated under three different hydraulic retention times (HRT: 4, 8 and 12 h) for municipal wastewater treatment in order to assess the composition and distribution of the fouling layer, as well as to identify the predominant fouling mechanisms. For that purpose, membrane autopsies were carried out based on fouling layer density determination, thermogravimetric, SEM and EDX analysis. Results showed a variable density of the fouling layer (average values were 13.90 ± 0.22, 13.46 ± 1.15 and 12.78 ± 0.49 mg/cm 2 for HRT of 4, 8 and 12 h, respectively), indicating that this parameter had an impact on the fouling density. Organic material was predominant in the fouling layer, being around 75% of its composition for the three HRT studied. Regarding pore-blocking mechanisms, standard blocking was the predominant mechanism at the beginning of filtration, coexisting at the end of it with cake filtration. In the first filtration cycle (1 h), after standard blocking, intermediate and complete blocking developed simultaneously during a short period of time and, finally, cake filtration prevailed. However, in the last (19 th ) filtration cycle, standard blocking and cake filtration occurred simultaneously from the beginning, suggesting the existence of an irreversible fouling layer, in spite of chemical cleaning.

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Biofouling in an anaerobic membrane bioreactor treating municipal sewage

Cited by 43 publications

References 36 publications

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

A step forward to a more efficient wastewater treatment by membrane surface modification via polymerizable bicontinuous microemulsion

Membrane fouling in a submerged membrane bioreactor: Impacts of floc size

Fouling layer characterization and pore-blocking mechanisms in an UF membrane externally coupled to a UASB reactor

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