Correlations of relevant membrane foulants with UF membrane fouling in different waters

Tian, Jiayu; Ernst, Mathias; Cui, Fuyi; Jekel, Martin

doi:10.1016/j.watres.2012.11.043

Cited by 189 publications

(70 citation statements)

References 38 publications

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 finding is in agreement with Peter-Varbanets et al [35], who also observed that "only biopolymers and the humic acid fraction of NOM were retained to some extent during filtration" of different types of water. The fact that BP was in percentage the most retained material was expected based on size exclusion effects [22,36,37] and was in accordance with other studies that have observed a flux decline through UF membrane when the concentration of BP was increased within a range of concentrations similar to that in the present study [35,38,39].…”

Section: Effect Of the Chemically Enhanced Bw Composition (Bw Ceb-c )supporting

confidence: 93%

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Reversibility of fouling on ultrafiltration membrane by backwashing and chemical cleaning: differences in organic fractions behaviour

Ferrer

Lefèvre

Prats

et al. 2016

Desalination and Water Treatment

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Membrane fouling is an inherent phenomenon in UF membrane processes, making it necessary to periodically perform backwashes (BW) and chemical "cleanings in place" (CIP) to restore the initial permeability of the membrane. The objective of this study was 1) to explore systematically the effect of distinct BW-related variables (BW transmembrane pressure, duration, frequency, composition) on the reversibility of UF membrane fouling and on the permeate quality (in terms of total organic carbon, turbidity and UV absorbance) over successive filtration/BW cycles; and 2) to identify which organic fractions were most removed by the membrane and, of these, which were most detached after BW, alkaline and oxidant CIP and acid CIP episodes. For this purpose, a bench-scale outside-in hollow fibre module operated under dead-end filtration mode at constant transmembrane pressure and treating settled water from a drinking water treatment plant was employed. Dissolved organic carbon fractionation was performed by high performance size exclusion chromatography (HPSEC). Results showed that in general the more intensive a BW was (in terms of high transmembrane pressure, shortened frequency and prolonged duration) the more effective it was in removing fouling from the membrane. Concerning the composition of the water used for the BW, the addition of NaClO led to maximum fouling reversibility, closely followed by the combination of NaOH+NaClO, while citric acid and NaOH contributed little compared to water alone.However, results also showed that irreversible fouling was never completely avoided whatever the BW regime applied, leading to a gradual increase of the total resistance over time. Larger

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Section: Effect Of the Chemically Enhanced Bw Composition (Bw Ceb-c )supporting

confidence: 93%

“…The pattern was expected from size exclusion effects [22,36,37]. Based on a mass-balance over the UF membrane, fouling was anticipated to be made up of 67% HS and 33% BP.…”

Section: Discussionmentioning

confidence: 97%

Reversibility of fouling on ultrafiltration membrane by backwashing and chemical cleaning: differences in organic fractions behaviour

Ferrer

Lefèvre

Prats

et al. 2016

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…Zhang et al [23] reported that high molecular weight biopolymers greatly contribute to the flux deterioration. Tian et al and Kimura et al observed correlation between biopolymers and the fouling in both UF [20] and MF [21] membranes. Moreover, Howe and Clark [24] found that the organic matter and particles in natural water ranging from 3 nm to 14 nm in size predominately contribute to the fouling of MF and UF membranes.…”

Section: Introductionmentioning

confidence: 97%

“…Humic substances [10][11][12][13][14] and biopolymers [15][16][17][18][19][20][21] in natural surface water have been intensively acknowledged as the main organic foulants on UF/MF membranes in both hydraulically reversible and irreversible fouling. Zheng et al [22] identified organic matter larger than the UF pore size as the major foulants, which contribute to the cake layer formation, while only a small remaining portion (unquantified) remains as hydraulically irreversible fouling after backwash.…”

Section: Introductionmentioning

confidence: 99%

Hydraulically irreversible fouling on ceramic MF/UF membranes: Comparison of fouling indices, foulant composition and irreversible pore narrowing

Shang

Vuong

et al. 2015

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. irreversible fouling, is still a critical aspect affecting the operational cost and energy consumption in water treatment plants. In this study, four ceramic membranes with pore sizes or molecular weight cut-off (MWCO) of 0.20 μm, 0.14 μm, 300 kDa and 50 kDa were compared during natural surface water filtration with respect to hydraulically irreversible fouling index (HIFI), foulant composition and narrowing of pore size due to the irreversible fouling. Our results showed that the hydraulically irreversible fouling index (HIFI) was proportional to the membrane pore size (r 2 =0.89) when the same feed water was filtrated. The UF membranes showed lower HIFI values than the MF membranes. Pore narrowing (internal fouling) was found to be a main fouling pattern of the hydraulically irreversible fouling. The internal fouling was caused by monolayer adsorption of foulants with different sizes that is dependent on the size of the membrane pore.

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“…Second, biopolymer may be produced by microorganisms as metabolites. It has been reported that the main foulants in water treatment systems are biopolymers [5,6]. Despite these on-going issues, few reports have emerged concerning the influence of BCF treatment on membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Biological Contact Filters (BCFs) on Membrane Fouling in Drinking Water Treatment Systems

Hasegawa

Iwamoto

Miyoshi

et al. 2017

Water

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Membrane fouling is a serious problem in drinking water treatment systems. Biological contact filters (BCFs) are often used as a pretreatment to remove ammonia, dissolved organic matter (DOM), and metal ions such as iron and manganese. In this study, the effect of BCF as a pretreatment for membrane fouling was evaluated using a laboratory-scale mini module consisting of a mini BCF column and a mini MF column. Initially, it was confirmed that the main foulant was a biopolymer (at low concentration) in the raw water. Subsequently, the biopolymer concentrations in the BCF influent and effluent were measured with the excitation emission matrix (EEM) fluorescence spectroscopy and the liquid chromatograph organic carbon detector (LC-OCD). The fouling potential of the BCF influent and effluent was also measured to evaluate MF membrane fouling rate. The results demonstrate that application of the BCF reduced the biopolymer concentration of the effluent and reduced membrane fouling. The effect of BCF was also established in an actual drinking water treatment plant. It was found that optimizing the contact time of raw water with the BCF was crucial to reduce membrane fouling.

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Correlations of relevant membrane foulants with UF membrane fouling in different waters

Cited by 189 publications

References 38 publications

Reversibility of fouling on ultrafiltration membrane by backwashing and chemical cleaning: differences in organic fractions behaviour

Reversibility of fouling on ultrafiltration membrane by backwashing and chemical cleaning: differences in organic fractions behaviour

Hydraulically irreversible fouling on ceramic MF/UF membranes: Comparison of fouling indices, foulant composition and irreversible pore narrowing

Effect of Biological Contact Filters (BCFs) on Membrane Fouling in Drinking Water Treatment Systems

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