Ceramic membrane ultrafiltration of natural surface water with ultrasound enhanced backwashing

Boley, A.; Narasimhan, K.; Kieninger, M.; Müller, W.

doi:10.2166/wst.2010.010

Cited by 6 publications

(3 citation statements)

References 6 publications

(6 reference statements)

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“…The outline of such cleaning systems resembles the configuration in Fig. 3 [74], and positive effects on cleaning efficiency are reported for microfiltration [75], ultrafiltration [76,77], and reverse osmosis membranes [74]. Although crevices that are not easily reached by conventional methods can also be cleaned, it should be considered that, depending on input power, membrane damage may occur [78,79].…”

Section: Current Ultrasonic Cleaning Applicationsmentioning

confidence: 99%

Physical Methods for Cleaning and Disinfection of Surfaces

et al. 2011

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Cleaning and disinfection are important operations in food processing because of the significant contributions to product hygiene and food safety. The transfer of residues from surfaces into a product and the contamination with adhering microorganisms must therefore be avoided with sufficient certainty. Traditional methods for the removal of adherents and inactivation of microorganisms are based on thermal, mechanical, or chemical principles and are known to be time-and energy-consuming. This has resulted in a search for alternative methods that show prospective potential for their use in food-processing plants. This review gives an overview on such methods, which are based on physical principles. In dry-ice cleaning, for example, carbon dioxide snow pellets are blasted onto a surface to remove adherents through a combined action of thermal and mechanical effects, followed by dissolution of these adherents. Ice-pigging is a procedure where an ice/ water mixture is forced through pipes, heat exchangers, or other equipment to carry off adhered substances. Another method for physical cleaning, mainly described in context with membrane filtration, is to use vibration in the ultrasonic frequency domain to reduce fouling and to stabilize permeate flux. Radiation from various sources (UV lamps, radionuclides, X-ray tubes) differs in its applicability and disinfection efficiency because of differences in energy and penetration depth. Cold plasma treatment is another promising technology that is currently under investigation for cleaning and disinfection of surfaces of inorganic and organic materials.

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Section: Current Ultrasonic Cleaning Applicationsmentioning

confidence: 99%

Physical Methods for Cleaning and Disinfection of Surfaces

et al. 2011

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“…A tight ceramic ultrafiltration membrane with molecular weight cut-off (MWCO) between 1 and 3 kDa can potentially be used as a novel method for RO pre-treatment. On one hand, more robust backwashing and harsh chemical cleaning can be applied to the tight ceramic UF membrane to control membrane fouling (Boley et al, 2010;Kim et al, 2008). On the other hand, rejection of charged solutes, such as phosphate, by a charged tight ceramic membrane can hypothetically be achieved due to electrostatic exclusion from a charged membrane.…”

Section: Introductionmentioning

confidence: 99%

Tight ceramic UF membrane as RO pre-treatment: The role of electrostatic interactions on phosphate rejection

Shang

Verliefde

et al. 2014

Water Research

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“…Another reason for this optimum filtration process is the US's low frequency, which could increase the removal of the fouling layer from the membrane surface. The low US frequency results in 1) localized turbulence and stronger vibration [101,122] and 2) lower concentration polarization and the cake layer resistance [90,102,105,123]. , [124], its effect also depends on the feed solution matrix.…”

Section: Uf-usmentioning

confidence: 99%

Ultrasound-assisted membrane technologies for fouling control and performance improvement: A review

Naji

Al-Juboori

Khan

et al. 2021

Journal of Water Process Engineering

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Membrane separation is widely used in wastewater treatment and desalination due to its high performance and ability to handle feed solutions of different qualities. Despite vast history of success, membrane fouling remains a major system deficiency that imposes substantial process limitations by reducing permeate production and increasing energy demand. Besides, chemical cleaning-in-place (CIP) adversely affects membrane integrity and generates an extra waste stream. Ultrasound (US) is a relatively new cleaning technique that improves process performance by mitigating fouling accumulation at a membrane surface and improving permeate flux by promoting mass and heat transfer. US-assisted membrane processes is an efficient method for fouling reduction and significant flux improvement. This study comprehensively reviews US applications in pressure-, thermally-and osmotic-driven membrane technologies and their impact on process performance. It also explores the impact of US operating conditions on membrane separation properties and how these parameters can be tuned to achieve the desirable outcome. To date, the application of US in membrane technologies is limited to laboratory tests. In the authors opinion, there is a niche market for US-assisted membrane technology in heavily contaminated water such as wastewater and brine. After critical analysis of the literature, we found that there are still several aspects of the process need to be scrutinized carefully to make an adequate evaluation of its feasibility on an industrial scale. The most urgent one is the techno-economic evaluation of the technology based on large-scale and long-term tests. The study proposed a set of recommendations for future research directions of US applications in membrane technologies.

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Ceramic membrane ultrafiltration of natural surface water with ultrasound enhanced backwashing

Cited by 6 publications

References 6 publications

Physical Methods for Cleaning and Disinfection of Surfaces

Physical Methods for Cleaning and Disinfection of Surfaces

Tight ceramic UF membrane as RO pre-treatment: The role of electrostatic interactions on phosphate rejection

Ultrasound-assisted membrane technologies for fouling control and performance improvement: A review

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