2014
DOI: 10.1002/jctb.4596
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Anaerobic fluidized membrane bioreactor polishing of baffled reactor effluent during treatment of dilute wastewater

Abstract: BACKGROUND: In this study an anaerobic fluidized bed membrane bioreactor (AFMBR) is added as a second stage to an operating anaerobic baffled bioreactor (ABR) to form a staged anaerobic baffled-fluidized membrane bioreactor (SAB-FMBR) operating at ambient temperature. RESULTS:The ABR first stage was operated at 3 h hydraulic retention time (HRT) and was followed by the AFMBR operated at 0.93 to 1.16 h HRT. The SAB-AFMBR system was fed with complex synthetic wastewater with COD averaging 250 mg L −1 . GAC fluid… Show more

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Cited by 25 publications
(10 citation statements)
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References 24 publications
(37 reference statements)
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“…In addition, larger particles may enhance the transport of smaller particles by scouring and sweeping them away from the membrane by shear-induced conditions (Chellam and Wiesner 1997). Also observed was that GAC fluidization in the AFMBR disaggregated microbial flocs, producing smaller compressible materials in the AFMBR, in the range of 0.1-1.2 µm, than were originally present in the feed suspension (Lee et al 2015). Similar results were found in another type of submerged aerobic MBR system with polypropylene materials added as suspended carriers (Huang et al 2010).…”
Section: Effect Of Media Characteristics On Fouling Control and Energmentioning
confidence: 84%
“…In addition, larger particles may enhance the transport of smaller particles by scouring and sweeping them away from the membrane by shear-induced conditions (Chellam and Wiesner 1997). Also observed was that GAC fluidization in the AFMBR disaggregated microbial flocs, producing smaller compressible materials in the AFMBR, in the range of 0.1-1.2 µm, than were originally present in the feed suspension (Lee et al 2015). Similar results were found in another type of submerged aerobic MBR system with polypropylene materials added as suspended carriers (Huang et al 2010).…”
Section: Effect Of Media Characteristics On Fouling Control and Energmentioning
confidence: 84%
“…Possible development pathways include the use of physical media for scouring of the membrane surface 34,35,49 or membrane vibration. 18,50,51 Including GAC in an AnMBR has many benefits (e.g., decreased membrane fouling, 35,52,53 higher fluxes, 52 and removal of trace contaminants), 35 but its use needs to be further evaluated through longterm experimental studies to better quantify trade-offs between an increased flux and a potential decrease in membrane life (increasing maintenance costs). To the degree possible, research efforts should focus on physical medium selection and membrane geometry to achieve membrane cleaning without damage, and simultaneously target cheaper, smaller, and lower density particles 49 to reduce upflow velocity requirements for bed expansion (e.g., reduce upflow velocity to <7.5 m·hr −1 while keeping HRT below 1.6 hrs).…”
mentioning
confidence: 99%
“…The hydrodynamics of fluidized-bed reactors have been investigated experimentally 28,29 and with simulations, 30–34 but membrane bioreactor studies of microbial activity have largely focused on experimental testing. 35,36 These studies do not track particle dynamics at high volume fraction (low porosity), but instead focus on macroscopic behavior such as fluidization stability and expansion. 37,38 The range of bed expansion in fluidized beds fluctuates between 20% and 70% with a qualitative understanding that low expansion leads to flow short-circuiting and high expansion leads to biofilm loss.…”
Section: A Case Study: Staged Anaerobic Fluidized-bed Membrane Biorea...mentioning
confidence: 99%