Identification of effluent organic matter fractions responsible for low-pressure membrane fouling

Filloux, Emmanuelle; Gallard, Hervé; Croué, Jean-Philippe

doi:10.1016/j.watres.2012.07.034

Cited by 114 publications

(61 citation statements)

References 44 publications

(54 reference statements)

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“…High MW biopolymers are produced by microorganisms during substrate metabolism and/or released during cell lysis and decay. They had much more significant influence on membrane flux and have been widely accepted as a major factor resulting in membrane fouling [27]. Wang et al found high MW molecules, in particular over 1,869.7 kDa, could not be detected in membrane effluent due to retention effects of the membrane and to the adsorption of the gel layer formed on membrane surfaces, while they were observed in conventional activated sludge (CAS) process [28,29].…”

Section: Influence Of Chemical Conditioning On Soluble Eps With Diffementioning

confidence: 99%

Understanding the impact of chemical conditioning with inorganic polymer flocculants on soluble extracellular polymeric substances in relation to the sludge dewaterability

Zhang¹,

Xiao²,

Liu³

et al. 2014

Separation and Purification Technology

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a b s t r a c tGenerally, sludge conditioned with inorganic coagulants exhibits rigid structure and is suitable for high pressure dewatering process. Sludge flocs possess multilayered structure, and the sludge dewaterability is mainly dependent on the properties of soluble extracellular polymeric substances (SEPS). However, few studies have focused on influence of chemical conditioning on the characteristics of SEPS. In this study, the surplus sludge obtained from wastewater treatment plant (WWTP) was conditioned with two inorganic polymer flocculants (IPFs), PACl and HPAC, for improving the sludge dewaterability which was measured using specific resistance to filtration (SRF). Meanwhile, the variation in SEPS properties was investigated with combined high performance size-exclusion chromatography (HPESC) and fluorescence excitation-emission matrix (EEM). According to the experimental results, HPAC showed better performance in improving sludge dewaterability due to higher charge density and better bridging properties. EEM coupled to fluorescence region integration (FRI) demonstrated that protein-like substances were dominant fraction of soluble EPS. HPSEC analysis indicated that most of the SEPS with high molecular weight (>2000 Da) were effectively removed from aqueous phase after conditioning, they might play more important roles in sludge dewatering. SRF correlated well with zeta potential, dissolved organic carbon (DOC) and EPS content located in all four EEM regions under chemical conditioning. This result revealed that EEM in conjunction with FRI was an attractive way to evaluate the sludge conditioning efficiency of IPFs.

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Section: Influence Of Chemical Conditioning On Soluble Eps With Diffementioning

confidence: 99%

Understanding the impact of chemical conditioning with inorganic polymer flocculants on soluble extracellular polymeric substances in relation to the sludge dewaterability

Zhang¹,

Xiao²,

Liu³

et al. 2014

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

“…The experiments were performed by using a bench-scale flexible filtration system according to [8]. The filtration system was operated in dead-end mode either in outside-in or inside-out configuration, depending on the type of membrane used.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…Previous work were mainly focused on (i) the identification of the fractions responsible for membrane fouling [7,8], (ii) the impact of the membrane configuration and/or nature [9,10], (iii) the impact of the operating conditions (e.g. critical flux, cleaning procedures) [11][12] and (iv) the mechanisms involved (e.g.…”

Section: Introductionmentioning

confidence: 99%

Ultrafiltration of biologically treated domestic wastewater: How membrane properties influence performance

Filloux

Teychene

Tazi‐Pain

et al. 2014

Separation and Purification Technology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Ultrafiltration of biologically treated domestic wastewater AbstractIn this study, the impact of membrane properties on membrane fouling and permeate water quality was investigated. Short-and long-term laboratory scale experiments using four commercially available hollow fiber UF membranes were performed to study the impact of membrane properties on reversible and irreversible fouling. No significant differences in terms of permeate quality (i.e. biopolymer rejection) were observed over the four tested membranes. It was found that membrane characteristics including pore size, pore distribution and especially materials had a strong impact on the filtration performances in terms of both reversible and irreversible fouling. The short-term filtration tests showed that due to its specific hydrodynamic condition only the inside-out mode UF membrane was subjected to irreversible fouling. These data demonstrate the importance of membrane selection with appropriate operating conditions for optimum performances. The added value of membrane characterization to lab-scale filtration tests for membrane performance was discussed.

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“…The uniqueness of each water stream renders the design of a universal anti-biofouling technique difficult and often water composition analysis [13][14][15] and membrane autopsies are required to understand fouling sources and mechanisms [16,17]. No conventional antifouling coatings have been found that are suitable due to poor adhesion of the anti-fouling layer or partial obstruction of the membrane pores.…”

Section: Introductionmentioning

confidence: 99%

Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles

Dumée

King

et al. 2015

Journal of Membrane Science

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Identification of effluent organic matter fractions responsible for low-pressure membrane fouling

Cited by 114 publications

References 44 publications

Understanding the impact of chemical conditioning with inorganic polymer flocculants on soluble extracellular polymeric substances in relation to the sludge dewaterability

Understanding the impact of chemical conditioning with inorganic polymer flocculants on soluble extracellular polymeric substances in relation to the sludge dewaterability

Ultrafiltration of biologically treated domestic wastewater: How membrane properties influence performance

Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles

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