A study of ultrafiltration membrane fouling by humic acids and flux recovery by backwashing: Experiments and modeling

Katsoufidou, K.; Yiantsios, S.G.; Karabelas, A.J.

doi:10.1016/j.memsci.2005.05.009

Cited by 280 publications

(134 citation statements)

References 35 publications

Supporting

Mentioning

128

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…The enrichment in BP suggested that components within this fraction, in particular polysaccharides rather than proteins, were not rigidly attached to the membrane but amenable to be washed out. This behaviour is likely due essentially to their size relative to that of the membrane pores: organic substances within the BP fraction much larger than the membrane pores lead to cake formation, which is more readily detached, while lighter fractions such as HS can cause pore blocking, build-up a denser cake layer less readily washed out or be adsorbed onto the membrane material [8,32]. The remaining BP and HS on the membrane would explain the irreversible fouling (never completely avoided whatever the BW regime applied) that resulted in the gradual increase of total resistance over time (Figures 3-6).…”

Section: Fouling Detachment After Each Backwashing and Cleaningmentioning

confidence: 99%

“…Fouling leads to additional hydraulic resistance to permeate flow, increase of the energy consumption of the process, lowering of the productivity, worsening of the product quality and eventually premature replacement of membranes [2,4,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…BW is performed by reversing the direction of flow through the membrane to dislodge and remove foulants from it and restore the initial permeability [6,[8][9][10]. Fouling removed by a hydraulic cleaning such as BW is referred to as "physically reversible fouling", in opposition to the "irreversible fouling" made of substances strongly adhered on or within the membrane and not flushed out by any physical cleaning procedure.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, the effect of feed water composition and membrane operating conditions have been most researched [8,[13][14][15], while less studies have dealt with the effect that BW variables Comparison of results from studies on BW variables is, moreover, not entirely reliable and needs to be treated with caution for several reasons. First, these studies treat different types of water: wastewater [2,5,6,11,12,16], seawater [1,17,18] and surface water [3,10], each with different fouling behaviour potential under a given BW regime.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

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

show abstract

Challenges and Mitigation Strategies Related to Biohydrogen Production

Salehmin

Satar

Mohamed

2023

Materials for Hydrogen Production, Conversion, and Storage

View full text Add to dashboard Cite

A study of ultrafiltration membrane fouling by humic acids and flux recovery by backwashing: Experiments and modeling

Cited by 280 publications

References 35 publications

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

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

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

Challenges and Mitigation Strategies Related to Biohydrogen Production

Contact Info

Product

Resources

About