The composition and compression of biofilms developed on ultrafiltration membranes determine hydraulic biofilm resistance

Derlon, Nicolas; Grutter, Alexander J.; Brandenberger, Fabienne; Sutter, Anja; Kuhlicke, Ute; Neu, Thomas R.; Morgenroth, Eberhard

doi:10.1016/j.watres.2016.06.019

Cited by 66 publications

(23 citation statements)

References 26 publications

(42 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results can be treated as valid, because the biofilm structure was visualized without alteration of the biofilm. Beside gravity driven membrane systems (Derlon et al, , ; Shen et al, ) high‐pressure operated membrane systems such as reverse osmosis devices are technologically important. So‐called membrane fouling simulators (MFS) are used to investigate the biofouling formation at lab‐scale.…”

Section: Oct In Biofilm Researchmentioning

confidence: 99%

Optical coherence tomography in biofilm research: A comprehensive review

Wagner

Horn

2017

Biotech & Bioengineering

142

View full text Add to dashboard Cite

Imaging of biofilm systems is a prerequisite for a better understanding of both structure and its function. The review aims to critically discuss the use of optical coherence tomography (OCT) for the visualization of the biofilm structure as well as its dynamic behavior. A short overview on common and well-known, established imaging techniques for biofilms such as scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), Raman microscopy (RM), and magnetic resonance imaging (MRI) paves the way to imaging biofilms at the mesoscale, which is perfectly covered by means of OCT. Principle, resolution, imaging velocity, and limitations of OCT are subsequently presented and discussed in the context of biofilm applications. Examples are provided showing the strength of this technique with respect to the visualization of the mesoscopic biofilm structure as well as the estimation of flow profiles and shear rates. Common and new structural parameters derived from OCT datasets are presented. Additionally, the review shows the importance of OCT with respect to a better description of mechanical biofilm properties. Finally, the implementation of multi-dimensional OCT datasets in biofilm modelling is shown by several examples aiming on an improved understanding of mass transfer at the bulk-biofilm interface. Biotechnol. Bioeng. 2017;114: 1386-1402. © 2017 Wiley Periodicals, Inc.

show abstract

Section: Oct In Biofilm Researchmentioning

confidence: 99%

Optical coherence tomography in biofilm research: A comprehensive review

Wagner

Horn

2017

Biotech & Bioengineering

142

View full text Add to dashboard Cite

show abstract

“…Similarly, Ashhab et al [274] reported that the secreted microbial substances not only influence film formation but also increase the viscosity of the mixed liquor. Consequently, this effect resulted in a significant increase in the overall hydraulic drag force [275,276]. However, measures and techniques to avert biofouling in MBR have been investigated under different conditions by several researchers.…”

Section: Microbial Foulants As Related To Pome Treatmentmentioning

confidence: 99%

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Abdulsalam

Man

Idris

et al. 2018

Water

View full text Add to dashboard Cite

Over the years, different types of alternative technologies have been developed and used for palm oil mill effluent (POME) treatment. Specifically, membrane bioreactor (MBR) has been employed to relegate pollutants contained in POME under different operating conditions, and the technology was found to be promising. The major challenge impeding the wider application of this technology is membrane fouling, which usually attracts high operating energy and running cost. In this regard, novel methods of mitigating membrane fouling through the treatment processes have been developed. Therefore, this review article specifically focuses on the recent treatment processes of POME using MBR, with particular emphasis on innovative processes conditions such as aerobic, anaerobic, and hybrid processing as well as their performance in relation to fouling minimization. Furthermore, the effects of sonication and thermophilic and mesophilic conditions on membrane blockage were critically reviewed. The types of foulants and fouling mechanism as influenced by different operating conditions were also analyzed censoriously.

show abstract

“…From the compressive rheology modeling in Fig. , the predicted fouling layer depth at the end of each cycle was approximately 80 µm, which is comparable to direct measurements for similar tests , . This predicted fouling layer thickness is based on numerical solution of the governing equation (Eq.…”

Section: Resultsmentioning

confidence: 99%

“…A key problem for these devices is membrane biofouling, which reduces the output rate of purified water and increases the capital and operating costs. This fouling layer is highly compressible and consolidates under applied differential pressure . Many microfiltration devices operate under constant flux conditions, so the applied pressure is continually increased to overcome the rising resistance from the fouling layer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predicting Transmembrane Pressure Rise from Biofouling Layer Compressibility and Permeability

2017

View full text Add to dashboard Cite

The operation of filtration membranes for wastewater treatment is severely affected by biofouling formation, which causes a rapid increase in transmembrane pressure (TMP) in constant rate filtration. The TMP rise is often attributed to particulate fouling within the membrane, but the external fouling layer or filter cake contributes significantly. The fouling is highly compressible, so any model must incorporate cake compression. A one-dimensional controlled rate model based on compressible cakes and accurate sludge properties is proposed to predict the TMP rise needed to maintain constant flux. Increased compressibility results in more rapid TMP rise. Model predictions were compared to pilot-plant data and showed good correlation, without assuming fouling within the membrane. Optimization of cycle times and flux rates are performed.

show abstract

The composition and compression of biofilms developed on ultrafiltration membranes determine hydraulic biofilm resistance

Cited by 66 publications

References 26 publications

Optical coherence tomography in biofilm research: A comprehensive review

Optical coherence tomography in biofilm research: A comprehensive review

Treatment of Palm Oil Mill Effluent Using Membrane Bioreactor: Novel Processes and Their Major Drawbacks

Predicting Transmembrane Pressure Rise from Biofouling Layer Compressibility and Permeability

Contact Info

Product

Resources

About