Advances in ceramic membranes for water treatment

Lee, M.; Wu, Zhentao; Li, K.

doi:10.1016/b978-1-78242-121-4.00002-2

Cited by 50 publications

(47 citation statements)

References 125 publications

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“…The range of the PEGs, PEG n=1 to PEG n=5 , was selected based on the purchased cut-off of the membranes (Eqs. (2) and (3), Table 2). It's imperative to keep the PEG range as small as possible to prevent pore plugging by large PEG molecules.…”

Section: Mwco Calculationmentioning

confidence: 99%

“…The effect of long-term chemical cleaning with sodium hypochlorite on the tubular ceramic NF membranes was investigated because it is known as the most effective cleaning agent for (organically) fouled ceramic membranes [2,6,17,21]. The permeability and MWCO were tested after 100 h of chemical cleaning with 1% sodium hypochlorite to simulate the cleaning intensity of one year of operation, assuming five days of continuous filtration followed by 1.33 h of chemical cleaning with 1% sodium hypochlorite for 365 days [17].…”

Section: Chemical Cleaningmentioning

confidence: 99%

“…Due to their robustness, ceramic membranes have become more popular in water treatment applications over the last decade. These membranes are not only perceived to be resistant to high pressure, temperature, and concentrations of chemicals but also to have a homogeneous distribution of narrow pores and a long lifetime [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Ceramic membranes have proven to be effective for drinking water treatment [2]. In literature, studies can also be found on the treatment of water streams with a high organic load originating from various industries, such as the treatment of textile industry waste streams, both on the laboratory [1,5,6] and pilot scale [7].…”

Section: Introductionmentioning

confidence: 99%

“…Sodium hypochlorite is widely used for chemical cleaning in order to remove organic and inorganic fouling from membranes [2,6,17,21,23]. However, there are few long-term studies on the effect of this chemical treatment in literature.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying defects in ceramic tight ultra- and nanofiltration membranes and investigating their robustness

Kramer

Shang

Scherrenberg

et al. 2019

Separation and Purification Technology

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Quantifying defects in ceramic tight ultra-and nanofiltration membranes and investigating their robustness Kramer, F. C.; Shang, R.; Scherrenberg, S. M.; Rietveld, L. C.; Heijman, S. J.G. A B S T R A C TOne of the perceived benefits of ceramic membranes is their robustness, which makes them suitable for treating high organic load waste streams. In particular, ceramic tight ultrafiltration (tUF) and nanofiltration (NF) form an important barrier against small colloids and organic molecules. In order to achieve this barrier, the quality of the membranes should be uncompromised.An extension on a commonly used size exclusion method was developed in order to quantify defects in membranes and calculate the MWCO accurately excluding the defects. This approach gives a better representation of the membrane quality than the original method. The quality of a broad range of commercial ceramic membranes was investigated by determining the (i) hydraulic permeability, (ii) molecular weight cutoff, and (iii) quantitative defects. Several membranesboth tubular and disc membranes, selected from various supplierswere tested to investigate their variability. Furthermore, the robustness of tubular NF membranes was studied by monitoring the effect of long-term exposure to sodium hypochlorite, which is commonly used to mitigate organic fouling.The results showed that batches of both tubular and disc membranes of different pore size and suppliers included membranes with defects. Furthermore, the long-term treatment of tubular ceramic membranes with sodium hypochlorite negatively affected, beyond expectation, the quality of the membranes. The separation layer in these membranes was not notably compromised by sodium hypochlorite exposure, but the end seal layer was damaged.

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Section: Mwco Calculationmentioning

confidence: 99%