A systematic insight into fouling propensity of soluble microbial products in membrane bioreactors based on hydrophobic interaction and size exclusion

Shen, Yue‐xiao; Zhao, Wentao; Xiao, Kang; Huang, Xia

doi:10.1016/j.memsci.2009.09.040

Cited by 134 publications

(50 citation statements)

References 34 publications

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“…For the initial stage of fouling, it was found that HIS was the most responsible for the rapid flux decline in the initial stage of microfiltration using hydrophilically enhanced PVDF membrane, and that the role of the fraction of HIS with MW > 100 kDa was particularly prominent despite its relatively low abundance [82]. This should be ascribed to steric effect rather than hydrophobic affinity between membrane and foulant.…”

Section: Fouling Mechanismsmentioning

confidence: 99%

“…Both of the properties could be qualitatively determined via column chromatography method based on differential adsorption and elution [81][82], yielding hydrophilic/hydrophobic fractions and acid/base/ neutral fractions. Another useful method for determining hydrophobicity is the bacterial adherence to hydrocarbons (BATH) test based on the partition of the target (bacteria) between aqueous phase and hydrocarbon droplet surface [83]; this method has recently been applied to the case of sludge flocs with the result termed relative hydrophobicity (RH) [84].…”

Section: Membrane Foulingmentioning

confidence: 99%

“…Additionally, surface charge could be otherwise quantified as zeta potential [84,85], though sensitive to the ionic condition applied in the measurement [86]. As for the steric properties of foulant, most attention has been focused on foulant size (or molecular weight at the macromolecular level) [82,87,88], with which the major fouling mechanism may vary substantially, as will be discussed later. Moreover, the concentration of foulant in the form of flocs, colloids or macromolecules can also play a role in fouling [85,89,90].…”

Section: Membrane Foulingmentioning

confidence: 99%

“…10 (d)) and/or proteins are more significantly related to fouling [85,[116][117][118]. Moreover, it can be inferred from many studies [81,82] that polysaccharides and/or proteins are usually the most abundant organic species in supernatant of MBR treating municipal wastewater, whereas the case is more complicated for industrial wastewater treatment. The molecular weight (MW) distributions of polysaccharides, proteins and humic substances are illustrated in Fig.…”

Section: Foulant Identificationmentioning

confidence: 99%

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Recent advances in membrane bioreactor technology for wastewater treatment in China

Huang

Xiao

Shen

2010

Front. Environ. Sci. Eng. China

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109

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Since the introduction of the membrane bioreactor (MBR) in China in the early 1990s, remarkable progress has been achieved on the research and application of this technology. China has now become one of the most active fields in the world in this regard. This review outlines the development of MBR-based processes in China and their performance of treating municipal and industrial wastewaters. Since membrane fouling is a critical operational problem with MBR processes, this paper also proposes updated understanding of fouling mechanisms and strategies of fouling control, which are mainly compiled from publications of Chinese researchers. As for the commercial application of MBR in the country, the latest statistics of large-scale MBR plants ( > 10000 m 3 $d -1 ) are provided, and the growth trend of total treatment capacity as well as its driving force is analyzed.

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Section: Fouling Mechanismsmentioning

confidence: 99%

Section: Membrane Foulingmentioning

confidence: 99%

Section: Membrane Foulingmentioning

confidence: 99%

Section: Foulant Identificationmentioning

confidence: 99%

See 2 more Smart Citations

Recent advances in membrane bioreactor technology for wastewater treatment in China

Huang

Xiao

Shen

2010

Front. Environ. Sci. Eng. China

Self Cite

109

View full text Add to dashboard Cite

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“…The flux decline of UF in the dead-end cell under constant pressure could be described by different blocking mechanisms: complete blocking, standard blocking, intermediate blocking and cake filtration (Shen et al, 2010). The equations for different membrane blocking mechanisms are listed below: (1) Complete blocking: ÀJ + J 0 = aV; (2) Standard blocking: 1/t + b = J 0 /V; (3) Intermediate blocking: Àln J + lnJ 0 = cV; (4) Cake filtration: 1/JÀ1/J 0 = dV, where V is the volume of the feed water; a, b, c and d are all constants.…”

Section: Modeling For Membrane Fouling Processmentioning

confidence: 99%

Effect of granular activated carbon addition on the effluent properties and fouling potentials of membrane-coupled expanded granular sludge bed process

Ding

Liang

et al. 2014

Bioresource Technology

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h i g h l i g h t sAdding GAC alleviated membrane fouling of a membrane-coupled EGSB process. It reduced the concentrations of SMP, SMP ps and SMP pr by 26.8%, 27.8% and 24.7%. It primarily reduced tryptophan proteins, aromatic proteins and fulvic substances. GAC addition mainly decreased the cake layer resistance proportion by 53.5%. a r t i c l e i n f o b s t r a c tTo mitigate membrane fouling of membrane-coupled anaerobic process, granular activated carbon (GAC: 50 g/L) was added into an expanded granular sludge bed (EGSB). A short-term ultrafiltration test was investigated for analyzing membrane fouling potential and underlying fouling mechanisms. The results showed that adding GAC into the EGSB not only improved the COD removal efficiency, but also alleviated membrane fouling efficiently because GAC could help to reduce soluble microbial products, polysaccharides and proteins by 26.8%, 27.8% and 24.7%, respectively, compared with the control system. Furthermore, excitation emission matrix (EEM) fluorescence spectroscopy analysis revealed that GAC addition mainly reduced tryptophan protein-like, aromatic protein-like and fulvic-like substances. In addition, the resistance distribution analysis demonstrated that adding GAC primarily decreased the cake layer resistance by 53.5%. The classic filtration mode analysis showed that cake filtration was the major fouling mechanism for membrane-coupled EGSB process regardless of the GAC addition.

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Polymer Hydrogels to Guide Organotypic and Organoid Cultures

Magno

Meinhardt

Werner

2020

Adv Funct Materials

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Human organotypic and organoid cultures provide increasingly lifelike models of tissue/organ development and disease, enable more realistic drug screening, and may ultimately pave the way for new therapies. A broad variety of extracellular matrix-based or inspired materials is instrumental in these approaches. In this review article, the foundations of the related materials design are summarized with an emphasis on the advantages and limitations of decellularized and reconstituted biopolymeric matrices as well as biohybrid and fully synthetic polymer hydrogel systems applied to enable specific organotypic and organoid cultures. Recent progress in the fabrication of defined hydrogel systems offering thoroughly tunable biochemical and biophysical properties is highlighted. Potentialities of hydrogel-based approaches to address the persisting challenges of organoid technologies, namely scalability, connectivity/integration, reproducibility, parallelization, and in situ monitoring are discussed.

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A systematic insight into fouling propensity of soluble microbial products in membrane bioreactors based on hydrophobic interaction and size exclusion

Cited by 134 publications

References 34 publications

Recent advances in membrane bioreactor technology for wastewater treatment in China

Recent advances in membrane bioreactor technology for wastewater treatment in China

Effect of granular activated carbon addition on the effluent properties and fouling potentials of membrane-coupled expanded granular sludge bed process

Polymer Hydrogels to Guide Organotypic and Organoid Cultures

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