New membranes made of sintered clay application to crossflow microfiltration

Bentama, Jilali; Ouazzani, Kamar; Elgarouani, Abdelaziz

doi:10.4314/ajst.v4i2.15299

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…The initial pure water flux showed a large increase at higher TMP while the lake water fluxes increased slowly. Similar result was also found by others [23][24][25][26][27][28]. Bhave [29] noticed that the flux at different pressures is influenced by the presence of particulates which favour the formation of concentration polarisation layer.…”

Section: Effect Of Transmembrane Pressure (Tmp) On Fluxsupporting

confidence: 84%

Chemical Cleaning of Microfiltration Ceramic Membrane Fouled by Nom

2018

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Microfiltration membrane made from Sayong ball clay by using uniaxial dry compaction method was used to treat natural organic matter (NOM) source water. A sintering temperature of 900 °C to 1000 °C were applied. The effect of sintering temperature on membrane porosity, strength and water flux were identified. The porosity of the membrane decreased with increasing sintering temperature and the strength and flux increased with temperature. The membrane was subjected to NOM filtration experiments. The results showed an improvement to the quality of permeate water, where there is a reduction in COD, TSS, BOD5, turbidity, hardness and salinity; and an increased pH value. The effect of chemical cleaning on the fouled membrane also was studied. After cleaning with NaOH solution, a high flux recovery was achieved (up to 50% from the initial pure water flux). The degree of cleanliness of fouled membranes after chemical cleaning was further observed with SEM and EDX analysis.

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Section: Effect Of Transmembrane Pressure (Tmp) On Fluxsupporting

confidence: 84%

Chemical Cleaning of Microfiltration Ceramic Membrane Fouled by Nom

2018

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“…The significant improvements made in synthetic-membrane development over the past decades make membrane processes excellent candidates for addressing the issues outlined above. It is now commonly acknowledged that membrane processes can be considered as high-performance separation techniques in many industrial applications [ 12 ]. The interest in membrane separations has rapidly increased during the last 10–15 years [ 13 , 14 ] in various fields: chemistry, food, biotechnology, and wastewater treatment [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

New Low-Cost Ceramic Microfiltration Membranes for Bacteria Removal

et al. 2022

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Safe water provision in low-income countries is constrained by limited financial resources, and the problem is worsened during natural disasters. Thus, there is a need to develop efficient low-cost technologies for point-of-use water treatment. This work reports on the development of new ceramic microfiltration membranes made from mixtures of inexpensive raw materials available locally (kaolin, bentonite and limestone) and their efficiency in rejecting bacteria such as Escherichia coli and Staphylococcus aureus. Thermogravimetric analysis, differential scanning calorimetry, Fourier-transform infrared spectroscopy, X-ray diffraction, mercury intrusion porosimetry, flexural strength and water uptake were used to characterize the raw materials and membranes. The addition of limestone in the membrane fabrication increased the pore size, the porosity and, thus, the permeability of the membranes but at the expense of the rejection performance. Among the different compositions studied, the membrane made of 83% kaolin, 10% bentonite and 7% limestone showed the best performance compromise with water permeability of 566 L·h−1·m−2·bar−1 and 100% rejection of both Escherichia coli and Staphylococcus aureus. These new low-cost microfiltration membranes are expected to have potential applications in water treatment and household applications.

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“…However, the production of alumina-based membranes results in high costs because alumina is an expensive material that requires high sintering temperatures [6,7]. In order to reduce costs, recent research on fabrication of ceramic membranes focuses more on the utilization of cheaper natural raw materials such as kaolin [8][9][10], fly ash [11,12] and clay [4,6,7,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous ceramic membranes from Sayong ball clay

Bazin

Ahmad

Nakamura

2019

Journal of Asian Ceramic Societies

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A porous ceramic membrane for the nano-filtration range was fabricated from a mixture of ball clay and starch. Sayong ball clay powders were mixed with starch as a pore former and compacted under a pressure of 200 MPa. The mixture was sintered at temperatures ranging from 900°C to 1200°C. It was found that the porous structure and crystalline phase of the sintered membrane were greatly dependent on the sintering temperature. The membranes exhibited bulk density varying from 1.5 g/cm 3 to 1.9 g/cm 3 , an apparent porosity ranging from 40.2% to 0.34%, an average pore size of 23.16 to 5.11 nm and flexural strength ranging from 1 to 21 MPa as the sintering temperature was increased. The pore size observed by SEM is much larger than these values, and these observed pores are believed to construct open channels that act as the main paths for filtration, as discuss later. The permeation flux greatly dependent on the transmembrane pressure and sintering temperatures. The membrane synthesized at 1050°C displayed the optimum properties as a nanofiltration membrane with a bulk density of 1.6 g/cm 3 , apparent porosity of 18%, pore size of 9.84 nm and flexural strength of 6 MPa.

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New membranes made of sintered clay application to crossflow microfiltration

Cited by 5 publications

References 3 publications

Chemical Cleaning of Microfiltration Ceramic Membrane Fouled by Nom

Chemical Cleaning of Microfiltration Ceramic Membrane Fouled by Nom

New Low-Cost Ceramic Microfiltration Membranes for Bacteria Removal

Preparation of porous ceramic membranes from Sayong ball clay

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