The impact of deflocculation–reflocculation on fouling in membrane bioreactors

Broeck, Rob Van den; Dierdonck, Jan Van; Caerts, Bart; Bisson, Ilse; Kregersman, Bart; Nijskens, P.; Dotremont, Chris; Impe, Jan Van; Smets, Ilse

doi:10.1016/j.seppur.2009.12.006

Cited by 47 publications

(18 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Especially small particles or sludge fragments appear to be of particular relevance in relation to membrane fouling [11,12,15], which is confirmed in this research. Higher membrane fouling rates were generally observed at increased mean fragment surface fractions whereas the relation with floc size (D eq ) is less clear (Table 5).…”

Section: Relationship Between Bioflocculation and Membrane Foulingsupporting

confidence: 84%

“…A detailed description of the image grabbing procedure can be found in Van den Broeck et al [11]. Next, a fully automated image analysis procedure, ACTIAS (ACTivated sludge Image Analysis System), was used for the characterization of the activated sludge composition [17,18].…”

Section: Image Analysismentioning

confidence: 99%

“…Apart from the SRT, also the particle size distribution is known to have a major influence on membrane fouling [10,11,12]. Foulants with smaller sizes than the membrane pores may enter the pores and pore blocking can occur.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of solids retention time on activated sludge bioflocculation and membrane fouling in a membrane bioreactor (MBR)

Broeck

Dierdonck

Nijskens³

et al. 2012

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

Section: Relationship Between Bioflocculation and Membrane Foulingsupporting

confidence: 84%

Section: Image Analysismentioning

confidence: 99%

See 1 more Smart Citation

The influence of solids retention time on activated sludge bioflocculation and membrane fouling in a membrane bioreactor (MBR)

Broeck

Dierdonck

Nijskens³

et al. 2012

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

“…Especially the latter is a process with relatively high time constants. By changing the ratio of monovalent over polyvalent cations in the influent, deflocculation-reflocculation events were induced by Van den Broeck et al [147]. A high ratio resulted in severe sludge deflocculation and worsened filtration characteristics.…”

Section: The Rate Of Changementioning

confidence: 99%

Membrane fouling in membrane bioreactors—Characterisation, contradictions, cause and cures

Drews

2010

Journal of Membrane Science

817

329

View full text Add to dashboard Cite

“…Recently, activated sludge bioflocculation has also been linked to membrane fouling in membrane bioreactors (MBR) (Van den Broeck et al, 2010). Activated sludge flocs are built up by several particles, i.e., primary particles (0.5-5 µm) and microcolonies (5-13 µm) (Jorand et al, 1995;Klausen et al, 2004;Mikkelsen, 2001).…”

Section: Introductionmentioning

confidence: 99%

The effect of alternating influent carbon source composition on activated sludge bioflocculation

Dierdonck

Broeck

Vervoort

et al. 2013

Journal of Biotechnology

Self Cite

View full text Add to dashboard Cite

which has been archived on the university repository Lirias (https://lirias.kuleuven.be/) of the Katholieke Universiteit Leuven.The content is identical to the content of the published paper, but without the final typesetting by the publisher.When referring to this work, please cite the full bibliographic info:Van Dierdonck, J., Van den Broeck, R., Vervoort, E., Van Impe, J., Smets, I. (2013). Effect of alternating influent carbon source composition on activated sludge bioflocculation. Journal of Biotechnology, 167 (3),[225][226][227][228][229][230][231][232][233][234] The journal and the original published paper can be found at: http://www.journals.elsevier.com/journal-of-biotechnology http://dx.doi.org/10.1016/j.jbiotec.2013.07.012 The corresponding author can be contacted for additional info.Conditions for open access are available at: http://www.sherpa.ac.uk/romeo/ Postprint version of paper published in Journal of Biotechnology 2013, vol. 167, issue 3, p. 225--234. The content is identical to the published paper, but without the final typesetting by the publisher. AbstractThe impact of alternating influent carbon sources, i.e., glucose and starch, on activated sludge bioflocculation was investigated. To this end, four lab-scale reactors were operated during a long-term experiment. During this period the influent carbon source ratio (glucose/starch) was alternated every 7 or 35 days (i.e., a fast and slow switching frequency). Bioflocculation was monitored throughout the entire experiment using an extensive set of parameters, including macroscopic and microscopic activated sludge characteristics. Sludge hydrophobicity remained high (> 80%) throughout the experiment indicating good bioflocculation. However, sludge settleability decreased for all four reactors after a 60 day adaptation period to the applied alternation in influent carbon source. During this adaptation period, floc size decreased due to the release of microcolonies. The subsequent period was characterized by a decrease in settleability, coinciding with a release of primary particles and an increase in floc size. The observed phenomena could be linked with the protein concentration near the floc surface. This fraction mainly consists of hydrolytic enzymes necessary for the degradation of starch and is responsible for a progressive deterioration of the EPS matrix. The results of this specific study indicate to be independent of the influent carbon source ratio or switching frequency.

show abstract

The impact of deflocculation–reflocculation on fouling in membrane bioreactors

Cited by 47 publications

References 31 publications

The influence of solids retention time on activated sludge bioflocculation and membrane fouling in a membrane bioreactor (MBR)

The influence of solids retention time on activated sludge bioflocculation and membrane fouling in a membrane bioreactor (MBR)

Membrane fouling in membrane bioreactors—Characterisation, contradictions, cause and cures

The effect of alternating influent carbon source composition on activated sludge bioflocculation

Contact Info

Product

Resources

About