Biofilm increases permeate quality by organic carbon degradation in low pressure ultrafiltration

Chomiak, A.; Traber, Jacqueline; Morgenroth, Eberhard; Derlon, Nicolas

doi:10.1016/j.watres.2015.08.009

Cited by 68 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bio-fouling layer adhered on the membrane surface was characterized in terms of the mass of volatile and total solids at the end of the experiment. The detail approach can be found in the literature [12]. Extraction of extracellular polymeric substances (EPS) from suspended sludge and the bio-fouling layer was conducted by the heating method as described by Adav and Lee [28].…”

Section: Biomass Quantification and Eps Measurementmentioning

confidence: 99%

“…While humic substances are considered as non-or slowly biodegradable, biopolymers removal in principle also can take place by biodegradation. For example, Chomiak et al [12] showed that hydrolysis and biodegradation of dextranes (MW 150 -2000 kDa) took place in membrane biofilms.…”

Section: Role Of the Bio-fouling Layer: Impact On Organics Removalmentioning

confidence: 99%

“…The properties of fouling layer do not only determine the flux, but also influence the quality of the permeate. Chomiak et al [12] found that the "biofilm + membrane" composite retained a larger amount of biodegradable foulants than the membrane alone, due to the activity of the biofilm. Derlon et al [13] found that a young biofilm on membranes increased the permeate quality due to the degradation of AOC (> 80%).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A low energy gravity-driven membrane bioreactor system for grey water treatment: Permeability and removal performance of organics

Ding

Liang

et al. 2017

Journal of Membrane Science

View full text Add to dashboard Cite

Synthetic grey water was treated with a low-pressure gravity-driven membrane bioreactor (GDMBR) system. The system was operated without any direct shear at the membrane surface and without any cleaning or flushing. In order to reduce energy consumption, one reactor was operated without aeration and the results were compared with an aerated reactor. Although the dissolved oxygen content was low (0.4-0.6 mg/L) in the nonaerated system, a stable permeability was observed at a level of around 20 L/m 2 hbar (flux of 1 L/m 2 h). The fouling resistance was dominated by the bio-fouling layer, which could be removed hydraulically. In comparison to the aerated system, the bio-fouling layer grown

show abstract

Section: Biomass Quantification and Eps Measurementmentioning

confidence: 99%

Section: Role Of the Bio-fouling Layer: Impact On Organics Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A low energy gravity-driven membrane bioreactor system for grey water treatment: Permeability and removal performance of organics

Ding

Liang

et al. 2017

Journal of Membrane Science

View full text Add to dashboard Cite

show abstract

“…The bio-fouling layer adhered on the membrane surface were measured as the mass of volatile and total solids at the end of the experiment. The detail approach can be found in this literature (Chomiak et al, 2015). The analyses were all carried out in duplicate.…”

Section: Biomass Quantificationmentioning

confidence: 99%

A low pressure gravity-driven membrane filtration (GDM) system for rainwater recycling: Flux stabilization and removal performance

et al. 2017

View full text Add to dashboard Cite

Rainwater is a nature resource, which can be widely used for non-potable and potable applications in water scared countries after appropriate treatment. Gravity-driven membrane filtration (GDM) process is a promising technology for decentralized rainwater treatment due to no backwashing, flushing and chemical cleaning. In this study, we established a single lab-scale GDM system for the stored rainwater (simulative cellar rainwater) treatment with two months operation, and a stored tap water was used as a compared system to evaluate the permeability and organics removal performance. Results showed that GDM exhibited a good performance for bacteria and turbidity removals, but the removal performance of DOC was undesirable due to the low rejection of low molecular-weight fulvic. Additionally, the permeate flux reached stable with the value of 6-6.5 L/mh during 60 days operation in the rainwater system, however, the tap water system stabilized only at 4 L/mh. Hydraulically reversible resistance accounted for large proportions (90%) of the total resistance, which indicated that the flux could be recovered by simple physical flushing. The bio-fouling layer adhered on the membrane surface was characterized at the end of the filtration experiment. Higher bio-activity with lower EPS (polysaccharides and proteins) contents of the fouling layer were found in the rainwater system compared with the control system, which was the main reason for the higher flux. These results show that rainwater can be treated in a single GDM process with low maintenance, which makes the process suitable for decentralized water supply.

show abstract

“…The biofilm of GDM filtration systems can improve permeate quality [11], e.g., it may delay microbial regrowth via the reduction of readily available organic carbon [16]. Moreover, biofilms were shown to be effective also against cyanotoxins: MCs in concentrations typically observed during HABs can be completely removed after an adaptation period of the biofilms of approximately 2 weeks [43].…”

Section: Introductionmentioning

confidence: 99%

Priming of microbial microcystin degradation in biomass-fed gravity driven membrane filtration biofilms

Silva

Blom

Yankova

et al. 2018

Systematic and Applied Microbiology

View full text Add to dashboard Cite

Gravity-driven membrane (GDM) filtration is a promising tool for low-cost decentralized drinking water production. The biofilms in GDM systems are able of removing harmful chemical components, particularly toxic cyanobacterial metabolites such as microcystins (MCs). This is relevant for the application of GDM filtration because anthropogenic nutrient input and climate change have led to an increase of toxic cyanobacterial blooms. However, removal of MCs in newly developing GDM biofilms is only established after a prolonged period of time. Since cyanobacterial blooms are transient phenomena, it is important to understand MC removal in mature biofilms with or without prior toxin exposure. In this study, the microbial community composition of GDM biofilms was investigated in systems fed with water from a lake with periodic blooms of MC-producing cyanobacteria. Two out of three experimental treatments were supplemented with dead biomass of a MC-containing cyanobacterial strain, or of a non-toxic mutant, respectively. Analysis of bacterial rRNA genes revealed that both biomass-amended treatments were significantly more similar to each other than to a non-supplemented control. Therefore, it was hypothesized that biofilms could potentially be 'primed' for rapid MC removal by prior addition of non-toxic biomass. A subsequent experiment showed that MC removal developed significantly faster in mature biofilms that were pre-fed with biomass from the mutant strain than in unamended controls, indicating that MC degradation was a facultative trait of bacterial populations in GDM biofilms. The significant enrichment of bacteria related to both aerobic and anaerobic MC degraders suggested that this process might have occurred in parallel in different microniches.

show abstract

Biofilm increases permeate quality by organic carbon degradation in low pressure ultrafiltration

Cited by 68 publications

References 20 publications

A low energy gravity-driven membrane bioreactor system for grey water treatment: Permeability and removal performance of organics

A low energy gravity-driven membrane bioreactor system for grey water treatment: Permeability and removal performance of organics

A low pressure gravity-driven membrane filtration (GDM) system for rainwater recycling: Flux stabilization and removal performance

Priming of microbial microcystin degradation in biomass-fed gravity driven membrane filtration biofilms

Contact Info

Product

Resources

About