Resumé

Dissolved extracellular polymeric substances (EPS) are often mentioned as the main foulant in membrane bioreactors (MBR). However, single bacterial cells may be the most important foulant but are often erroneously measured as EPS in traditional spectrophotometric analysis. Raw sludge and sludge supernatant with varying concentrations of planktonic cells was filtered, and showed a direct correlation between the planktonic cell count and rate of flux decline. Thus, high concentrations of single cells result in membrane fouling. DNA fingerprinting of activated sludge samples from a full scale MBR wastewater treatment plants (WWTP) was applied to determine the identity of the most abundant single cells. Several bacteria genera were observed to be enriched in the water phase, many of them known to be abundant in influent wastewater and these may influence fouling propensity in MBR systems.
OriginalsprogEngelsk
Publikationsdato25 jun. 2019
StatusUdgivet - 25 jun. 2019
BegivenhedIWA-MTC Toulouse 2019: 9th International Water Association (IWA) Membrane Technology Conference & Exhibition for Water and Wastewater Treatment and Reuse - Toulouse, Frankrig
Varighed: 23 jun. 201927 jun. 2019

Konference

KonferenceIWA-MTC Toulouse 2019
LandFrankrig
ByToulouse
Periode23/06/201927/06/2019

Fingerprint

fouling
bioreactor
membrane
bacterium
sludge
DNA fingerprinting
activated sludge
wastewater
water

Citer dette

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title = "Contribution of planktonic bacteria to MBR fouling",
abstract = "Dissolved extracellular polymeric substances (EPS) are often mentioned as the main foulant in membrane bioreactors (MBR). However, single bacterial cells may be the most important foulant but are often erroneously measured as EPS in traditional spectrophotometric analysis. Raw sludge and sludge supernatant with varying concentrations of planktonic cells was filtered, and showed a direct correlation between the planktonic cell count and rate of flux decline. Thus, high concentrations of single cells result in membrane fouling. DNA fingerprinting of activated sludge samples from a full scale MBR wastewater treatment plants (WWTP) was applied to determine the identity of the most abundant single cells. Several bacteria genera were observed to be enriched in the water phase, many of them known to be abundant in influent wastewater and these may influence fouling propensity in MBR systems.",
keywords = "Modelling, Fouling, Membrane bioreactor",
author = "J{\o}rgensen, {Mads Koustrup} and {Hove Hansen}, Susan and Nierychlo, {Marta Anna} and Christensen, {Morten Lykkegaard} and Nielsen, {Per Halkj{\ae}r}",
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note = "null ; Conference date: 23-06-2019 Through 27-06-2019",

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Contribution of planktonic bacteria to MBR fouling. / Jørgensen, Mads Koustrup; Hove Hansen, Susan; Nierychlo, Marta Anna; Christensen, Morten Lykkegaard; Nielsen, Per Halkjær.

2019. Abstract fra IWA-MTC Toulouse 2019, Toulouse, Frankrig.

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

TY - ABST

T1 - Contribution of planktonic bacteria to MBR fouling

AU - Jørgensen, Mads Koustrup

AU - Hove Hansen, Susan

AU - Nierychlo, Marta Anna

AU - Christensen, Morten Lykkegaard

AU - Nielsen, Per Halkjær

PY - 2019/6/25

Y1 - 2019/6/25

N2 - Dissolved extracellular polymeric substances (EPS) are often mentioned as the main foulant in membrane bioreactors (MBR). However, single bacterial cells may be the most important foulant but are often erroneously measured as EPS in traditional spectrophotometric analysis. Raw sludge and sludge supernatant with varying concentrations of planktonic cells was filtered, and showed a direct correlation between the planktonic cell count and rate of flux decline. Thus, high concentrations of single cells result in membrane fouling. DNA fingerprinting of activated sludge samples from a full scale MBR wastewater treatment plants (WWTP) was applied to determine the identity of the most abundant single cells. Several bacteria genera were observed to be enriched in the water phase, many of them known to be abundant in influent wastewater and these may influence fouling propensity in MBR systems.

AB - Dissolved extracellular polymeric substances (EPS) are often mentioned as the main foulant in membrane bioreactors (MBR). However, single bacterial cells may be the most important foulant but are often erroneously measured as EPS in traditional spectrophotometric analysis. Raw sludge and sludge supernatant with varying concentrations of planktonic cells was filtered, and showed a direct correlation between the planktonic cell count and rate of flux decline. Thus, high concentrations of single cells result in membrane fouling. DNA fingerprinting of activated sludge samples from a full scale MBR wastewater treatment plants (WWTP) was applied to determine the identity of the most abundant single cells. Several bacteria genera were observed to be enriched in the water phase, many of them known to be abundant in influent wastewater and these may influence fouling propensity in MBR systems.

KW - Modelling

KW - Fouling

KW - Membrane bioreactor

M3 - Conference abstract for conference

ER -