The effect of organic loading on process performance and membrane fouling in a submerged membrane bioreactor treating municipal wastewater

Trussell, R. Rhodes; Merlo, Rion; Hermanowicz, Slawomir W.; Jenkins, David

doi:10.1016/j.watres.2006.04.020

Cited by 201 publications

(86 citation statements)

References 24 publications

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“…This was in spite of the overall SMP levels in the AnMBR being almost 5 times higher than in the AeMBR reactor (Figure 3), and that a high abundance of SMP had been shown previously to correlate to membrane fouling [38]. A previous study comparing AeMBR and AnMBR systems reported SMP levels that were up to 6 times higher in the AnMBR, and that the AnMBR experienced more rapid membrane fouling [39].…”

Section: Discussionmentioning

confidence: 68%

Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors

Xiong

Harb

Hong

2016

Separation and Purification Technology

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Please cite this article as: Y. Xiong, M. Harb, P-Y. Hong, Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors, Separation and Purification Technology (2015), doi: http://dx.doi.org/10.1016/j.seppur. 2015.11.024 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThis study compares the membrane fouling mechanisms of aerobic (AeMBR) and anaerobic membrane bioreactors (AnMBR) of the same reactor configuration at similar operating conditions. Although both the AeMBR and AnMBR achieved more than 90% COD removal efficiency, the fouling mechanisms were different. Molecular weight (MW) fingerprint profiles showed that a majority of fragments in anaerobic soluble microbial products (SMP) were retained by the membrane and some AnMBR systems and can be applied to facilitate the development of appropriate fouling control strategies.

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Section: Discussionmentioning

confidence: 68%

Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors

Xiong

Harb

Hong

2016

Separation and Purification Technology

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“…Previous studies reported that carbohydrates in SMP are the major components responsible for membrane fouling (Kimura et al 2005;Rosenberger et al 2006;Trussel et al 2006). Recent reports, however, pointed out that proteins are also important foulants in MBRs (Metzger et al 2007;Kimura et al 2008a;Miyoshi et al 2009;Tang et al 2010;Tian et al 2011).…”

Section: Characteristics Of Extracted Foulantsmentioning

confidence: 99%

“…In the early studies on membrane fouling in MBRs, the relationships between concentrations of such microbial products evaluated with conventional colorimetric methods (Lowry et al 1951;Dubois et al 1956) and fouling rate were intensively investigated. Although reasonable relationships between microbial products concentrations and fouling rates were seen in some studies (Ng et al 2006;Rosenberger et al 2006;Trussel et al 2006), other researchers reported that development of membrane fouling cannot be explained by concentrations of microbial products determined by the conventional analytical methods Kimura et al 2009;Miyoshi et al 2009). These discrepancies suggested that some fractions of organic matter contained in mixed liquor suspension contribute more to membrane fouling than the others (Drews 2010;Miyoshi et al 2010).…”

Section: Introductionmentioning

confidence: 96%

Identification of proteins involved in membrane fouling in membrane bioreactors (MBRs) treating municipal wastewater

Miyoshi

Aizawa

Kimura

et al. 2012

International Biodeterioration & Biodegradation

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The proteins that caused membrane fouling in a continuous operation of MBRs treating real municipal wastewater were investigated in detail. We continuously operated two identical pilot-scale MBRs under different solid retention times (SRTs) and extracted the foulants at the end of the operation. Regardless of the operating conditions, proteins were dominant components in the foulants extracted from the fouled membranes. The extracted proteins were subjected to the separation with two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and the identification through the N-terminal amino acid sequencing analysis. The proteins concentrated by the combination of the crude concentration using an ultra-filtration (UF) membrane and trichloroacetic acid (TCA) precipitation were separated and visualized well on 2D-PAGE gels. The results of 2D-PAGE analysis indicated that the compositions of proteins that caused membrane fouling significantly differed depending on the SRT, although such differences cannot be seen in the amino acid composition analysis. Analyzing selected 2D-PAGE spots by N-terminal amino acid sequencing analysis led to the identification of two well-characterized outer membrane proteins originating from Pseudomonas genus, namely OprF and OprD. To our knowledge, this is the first successful identification of proteins that have caused membrane fouling in continuous operations of MBRs treating real wastewater.

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“…Total proteins and total polysaccharides were quantitated using commonly employed colorimetric methods, for example (Trussell et al, 2006). Proteins were measured using the Modified Lowry Protein Assay Kit (Number 23240, Pierce Biotechnology, Rockford, IL).…”

Section: Proteins and Polysaccharides Measurementmentioning

confidence: 99%

Bismuth dimercaptopropanol (BisBAL) inhibits the expression of extracellular polysaccharides and proteins by Brevundimonas diminuta: Implications for membrane microfiltration

Badireddy

Chellam

Yanina

et al. 2007

Biotech & Bioengineering

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A 2:1 molar ratio preparation of bismuth with a lipophilic dithiol (3-dimercapto-1-propanol, BAL) significantly reduced extracellular polymeric substances (EPS) expression by Brevundimonas diminuta in suspended cultures at levels just below the minimum inhibitory concentration (MIC). Total polysaccharides and proteins secreted by B. diminuta decreased by approximately 95% over a 5-day period when exposed to the bismuth-BAL chelate (BisBAL) at near MIC (12 microM). Fourier-transform infrared spectroscopy (FTIR) suggested that a possible mechanism of biofilm disruption by BisBAL is the inhibition of carbohydrate O-acetylation. FTIR also revealed extensive homology between EPS samples with and without BisBAL treatment, with proteins, polysaccharides, and peptides varying predominantly only in the amount expressed. EPS secretion decreased following BisBAL treatment as verified by atomic force microscopy and scanning electron microscopy. Without BisBAL treatment, a slime-like EPS matrix secreted by B. diminuta resulted in biofouling and inefficient hydrodynamic backwashing of microfiltration membranes.

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The effect of organic loading on process performance and membrane fouling in a submerged membrane bioreactor treating municipal wastewater

Cited by 201 publications

References 24 publications

Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors

Characterization of biofoulants illustrates different membrane fouling mechanisms for aerobic and anaerobic membrane bioreactors

Identification of proteins involved in membrane fouling in membrane bioreactors (MBRs) treating municipal wastewater

Bismuth dimercaptopropanol (BisBAL) inhibits the expression of extracellular polysaccharides and proteins by Brevundimonas diminuta: Implications for membrane microfiltration

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