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Ceramic membrane picture used in the experiment: (a) the entire illustration and crosssectional area, (b) ceramic membrane internal channels and walls.
Source publication
In this comprehensive study, a seven-channel ultrafiltration (UF) titania membrane was used to investigate the impact of the pulsatile cleaning process on the crossflow filtration system. Seventeen experimental runs were performed for different operating conditions with a transmembrane pressure (TMP) varying from 0.5 to 1.5 bar, a crossflow velocit...
Contexts in source publication
Context 1
... this study, a LabBrain filtration unit manufactured by LiqTech International ( Figure S1 (Supplementary Materials)) was used to perform all the experiments in the crossflow mode. The experiments were operated in batch mode, where the feed/concentrate is continuously recirculated through the ceramic membrane for 2 h. ...
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... study used an ultrafiltration ceramic membrane (zirconia/titania) with seven channels (Figure 1) for the produced water treatment using the LabBrain filtration unit. Table 4 provides the essential membrane properties and specifications. ...
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... 7 depicts that an increase in the TMP to a level of 1.5 bar enhances the permeate flux and net permeate volume (Runs 1, 4, and Runs 2, 3). In addition, a high transmembrane pressure of 1.5 bar and a pulsatile reversal-flow level of 90 or 60-s lead to a high membrane performance (Runs 1, 3, 8, and 11). The central point runs (Runs 9, 12, 14, 15, and 17) at a pulsatile cycle of 90-s show a better membrane performance than all pulsatile cycles of 120 s configurations. ...
Context 4
... optimal response values were achieved by combining the process parameters levels (TMP, CFV, and Pulsatile cycle) that simultaneously satisfy the maximization criteria for each response. As a result, the desirability function was used as a multi-criteria methodology to optimize this process, identify the optimum parameters, and maximize the response values in Figures 9 and 10, as reported in Tables S2 and S3. All the independent factors and process responses are given a significance level of three and optimized in their range for the maximum membrane-permeate flux and permeate volume, respectively. ...
Citations
... This technology was industrialized in the late 1970s, because of its flexible and stable operation, small size, economic viability, low energy consumption and good separability [1][2][3]. Membrane technology has been highly developed in the separation of liquid components such as seawater desalination [4], oil-water separation [5] and water treatment [6], etc. The separation characteristics of these membrane processes and their influencing factors have been thoroughly investigated through theory, experiment and simulation. ...
Gas membrane separation technology is widely applied in different industry processes because of its advantages relating to separation performance and economic efficiency. It is usually difficult and time consuming to determine the suitable membrane materials for specific industrial separation processes through traditional experimental research methods. Molecular simulation is widely used to investigate the microscopic morphology and macroscopic properties of materials, and it guides the improvement of membrane materials. This paper comprehensively reviews the molecular-level exploration of the dominant mechanism and influencing factors of gas membrane-based separation. The thermodynamics and kinetics of polymer membrane synthesis, the molecular interactions among the penetrated gases, the relationships between the membrane properties and the transport characteristics of different gases in the composite membrane are summarized and discussed. The limitations and perspectives of the molecular simulation method in the study of the gas membrane separation process are also presented to rationalize its potential and innovative applications. This review provides a more comprehensive reference for promoting the materials’ design and engineering application of the gas separation membrane.
In this study, we evaluate the performance of the newly developed periodic transmembrane pressure technique
(PTMP) in relation to two conventional physical antifouling techniques, namely, backwashing and backpulsing in
the context of the filtration of oily water systems using ceramic membranes. The results demonstrate that the
novel PTMP established higher performance than the other two techniques. Values of the overall permeate
volume, steady-state permeate flux, residual flux, and fouling reversibility using the PTMP were shown to be
higher than those of the other two techniques. In addition, visual inspection of the internal surface of membrane
channels post-filtration shows that the PTMP achieved a clean as-new surface compared to the other two
techniques. Resistances-in-series model analysis was employed to inspect and analyze the development of fouling
upon using the three techniques. PTMP presented a negligible internal resistance and a small cake layer resistance
compared to backwashing, pulsatile flow, and regular crossflow filtration. The PTMP is therefore a
promising physical antifouling method that can be implemented in an existing crossflow filtration system with
basic modification, in addition to the ease of use and energy efficiency.
