Hydraulic resistance of biofilms

Dreszer, C.; Vrouwenvelder, Johannes S.; Paulitsch-Fuchs, Astrid H.; Zwijnenburg, A.; Kruithof, Joop C.; Flemming, Hans Curt

doi:10.1016/j.memsci.2012.11.030

Cited by 113 publications

(76 citation statements)

References 39 publications

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“…In general it must be considered that ATP is a cell activity parameter and reveals limited information about the actual effect of biofilm formation on plant performance, as reduced performance due to biofouling is mainly caused by the excreted EPS and not by the cells and their ATP [14,27].…”

Section: Organic and Biological Foulingmentioning

confidence: 99%

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Beyer

Rietman²,

Zwijnenburg³

et al. 2014

Journal of Membrane Science

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Section: Organic and Biological Foulingmentioning

confidence: 99%

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Beyer

Rietman²,

Zwijnenburg³

et al. 2014

Journal of Membrane Science

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“…FCP was directly measured. Water permeability ( ) and water flux ( ) were derived as described in [24]. During the experiments, temperature was maintained at 20 ∘ C. , FCP, and salt rejection cleaning efficiencies are presented as % improvement.…”

Section: Data Normalization From Laboratory-scale Cleaningmentioning

confidence: 99%

“…For protein and polysaccharide quantification, biofilms were harvested and homogenized as described in [24]. Homogenates were subsequently centrifuged at 3,000 ×g for 10 min, at room temperature, to remove debris.…”

Section: Cleaning Procedures and Assessment Of Cleaning Effectivenessmentioning

confidence: 99%

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Membrane Fouling and Chemical Cleaning in Three Full-Scale Reverse Osmosis Plants Producing Demineralized Water

Beyer

Laurinonyte²,

Zwijnenburg³

et al. 2017

Journal of Engineering

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Membrane fouling and cleaning were studied in three reverse osmosis (RO) plants. Feed water was secondary wastewater effluent, river water, and surface water. Membrane autopsies were used for fouling characterization. Fouling layer measurements included total organic carbon (TOC), adenosine triphosphate, polysaccharides, proteins, and heterotrophic plate counts. In all locations, membrane and spacer fouling was (bio)organic. Plant chemical cleaning efficiencies were evaluated from full-scale operational data and cleaning trials in a laboratory setup. Standard cleaning procedures were compared to two cleaning procedures specifically adapted to treat (bio)organic fouling using commercial blend cleaners (mixtures of active substances). The three RO plants were impacted by irreversible foulants causing permanently decreased performance in normalized pressure drop and water permeability even after thorough chemical cleaning. The standard plant and adapted cleaning procedures reduced the TOC by 45% on average, with a maximum of ∼80%. In general, around 20% higher biomass removal could be achieved with adapted procedure I compared to adapted procedure II. TOC measurements and SEM showed that none of cleaning procedures applied could remove foulants completely from the membrane elements. This study underlines the need for novel cleaning approaches targeting resistant foulants, as none of the procedures applied resulted in highly effective membrane regeneration.

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“…By three ways, as are, increase of the transmembrane pressure drop, increase of feed channel pressure drop, and increase of transmembrane passage [10].…”

Section: Introductionmentioning

confidence: 99%

Anti-Biofilm Drug Susceptibility Testing Methods: Looking for New Strategies against Resistance Mechanism

Bueno¹

2011

JMBT

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Biofilm is a reservoir of drug resistant microorganisms that can increase the failure rate of anti-infective therapy and is a public health concern. Antibiofilm drug discovery is necessary for developing new drugs, biocides and wound management protocols. This makes the standardization and implementation of in vitro antibiofilm screening platforms a challenge in the search for new antibiotics, because current antimicrobials are active against planktonic bacteria and have poor diffusion across biofilm matrix. Usually, based in the research topic, the antibiofilm methods have been classified in static and flow depending of continuous supply of nutrients that affect the microbial growth, the final aim of these assays is obtain Minimal Biofilm Inhibitory Concentration (MBIC) and Minimal Biofilm Eradication Concentration (MBEC) values as efficacy parameter of the compound or procedure evaluated, but is very important correlates data from different models in order to give real results of activity. This review aims at describing the initial tools for to establishing an antibiofilm drug discovery-prospecting program.

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Hydraulic resistance of biofilms

Cited by 113 publications

References 39 publications

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Long-term performance and fouling analysis of full-scale direct nanofiltration (NF) installations treating anoxic groundwater

Membrane Fouling and Chemical Cleaning in Three Full-Scale Reverse Osmosis Plants Producing Demineralized Water

Anti-Biofilm Drug Susceptibility Testing Methods: Looking for New Strategies against Resistance Mechanism

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