Ultrasound enhancement of microfiltration performance for natural organic matter removal

Tran, Truyen; Gray, Stephen; Bolto, B.A.; Farmer, Tony; Collings, Tony F.

doi:10.1016/j.orggeochem.2007.02.019

Cited by 13 publications

(6 citation statements)

References 20 publications

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“…It has been successfully applied to several membrane processes [95][96][97][98][99][100][101][102][103][104][105], such as MF, UF and dialysis which suffer from concentration polarization and subsequent fouling. It has also been reported that acoustic vibration and induced heating could enhance thermally driven processes such as MD [12,106], and improve their permeability, greatly reduce temperature polarization and membrane fouling.…”

Section: Ultrasonic Systemsmentioning

confidence: 99%

“…In previous studies, the ultrasonic enhancement technique was mainly applied to filtration process using flat sheet membranes, and only a few studies have been reported on other membrane processes involving hollow fiber modules [99,104,105,112]. This may be due to the 42 difficulty in identifying the appropriate position to place the reflection plate (refer to Fig.…”

Section: Ultrasonic Systemsmentioning

confidence: 99%

See 1 more Smart Citation

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Yang¹,

Wang²,

Fane³

et al. 2013

Desalination and Water Treatment

119

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Membrane-based separation processes have found numerous applications in various industries over the past decades. However, higher energy consumption, lower productivity and shorter membrane lifespan due to polarization and membrane fouling continue to present severe technical challenges to membrane-based separation. Improved membrane module design and novel hydrodynamics offer strategies to address these challenges.This review focuses on hollow fiber membrane modules which are well-suited to membrane contactor separation processes. Attempts to improve membrane module design should begin with a better understanding of the mass transfer in the hollow fiber module, therefore this review provides a summary of prior studies on the mass transfer models related to both the shell-side and tube-side fluid dynamics. Based on the mass transfer analysis, two types of technique to enhance hollow fiber membrane module performance are discussed: (1) passive enhancement techniques that involve the design and fabrication of effective modules with optimized flow geometry; or (2) active enhancement techniques that uses external energy to induce a high shear regime to suppress the undesirable fouling and concentration polarization phenomena. This review covers the progress over the past five years on the most commonly proposed techniques such as bubbling, vibrations and ultrasound.Both enhancement modes have their advantages and drawbacks. Generally, the passive enhancement techniques offer modest improvement of the system performance, while the active techniques, including bubbling, vibrating and ultrasound, are capable of providing as high as 315 times enhancement of the permeation flux. Fundamentally, the objectives of module design should include the minimization of the cost per amount of mass transferred (energy consumption 3 and module production cost) and the maximization of the system performance through optimizing the flow geometry and operating conditions of the module, scale-up potential and expansion of niche applications. It is expected that this review can provide inspiration for novel module development.

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Section: Ultrasonic Systemsmentioning

confidence: 99%

Section: Ultrasonic Systemsmentioning

confidence: 99%

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Yang¹,

Wang²,

Fane³

et al. 2013

Desalination and Water Treatment

119

View full text Add to dashboard Cite

show abstract

“…Acoustic streaming is defined as the absorption of acoustic energy resulting in fluid flow, which does not require the collapse of cavitation bubbles [10]. Acoustic streaming in the liquid increases the velocity of the solute and results in eddy currents near the membrane surface [11]. Therefore, this mechanism causes liquid bulk movement toward and away from the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound membrane hybrid processes for dairy wastewater treatment: pilot-scale analysis

Kertész

Kovács

Hodúr

et al. 2016

Desalination and Water Treatment

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Novel wastewater treatments are necessary to effectively decrease the organic load of dairy wastewater before disposal. In this work the feasibility of a hybrid process of membrane filtration combined with ultrasonication to decrease organic load was investigated. The efficiency of the advanced hybrid process that simultaneously applies ultrasonic irradiation and pressure-driven membrane ultrafiltration was examined. Polyethersulfone ultrafiltration membranes with 20 and 50 kDa molecular weight cutoff were tested. The effects of the continuous and half intermittent ultrasonic irradiation during the ultrafiltration were compared. Ultrafiltration fluxes, chemical oxygen demand retentions and membrane, pore fouling and polarization layer resistances were analyzed in a combined process. Furthermore, mass transfer coefficients, fouling coefficients and concentrations on membrane surface were also calculated and compared. The results showed that the best correlation were achieved by plotting the cake filtration model, but the other models also have given relatively good correlations using gradual pore blocking and intermediate filtration models. For this reason the membrane filtration ultrasonication should be further investigated for future applications.

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“…This is due to the formation of a slurry layer on the filter surface, clogging the pores and reducing its hydraulic conductivity (Sondhi and Bhave, 2001). In most cases, the regeneration of filter medium is carried out by reverse flow, but the use of sonication to clean the filter medium is becoming increasingly important (Tran et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of ultrasound on the performance improvement of wastewater microfiltration through a porous ceramic filter

Rocha

Marques

Silva

2009

Braz. J. Chem. Eng.

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-Filtration under an ultrasonic field is a technique that is gaining importance in the wastewater treatment research field, not only due to its ability as a cleaning mechanism, but also as a filtration intensifier. The main objective of this research was the study of the influence of ultrasonic waves on the filtration of the oilfield wastewater (known as produced water) in order to increase the operation performance and filter medium regenerative effectiveness. A 0.016 m 2 hollow cylindrical porous ceramic filter was submitted to the filtration of produced water by two mechanisms: conventional filtration under vacuum and filtration under the influence of ultrasonic waves. Experiments were carried out using synthetic produced water by analyzing the variables oil and grease content (O&G) and total suspended solids (TSS) for each filtration run. Backwashing of the filter medium with distilled water was also performed to evaluate the regeneration efficiency. During conventional filtration, permeate flux decreased gradually, becoming stable around 0.06 cm 3 .cm -2 .s -1 . Furthermore, in the filtration assisted by ultrasound, the permeate flux was around 0.15 cm 3 .cm -2 .s -1 . Therefore, ultrasonic waves provided an increase of about 150% in the permeate flux. Moreover, the sonication improved filter medium regeneration effectiveness, even under conditions of high TSS and O&G contents. Taking into consideration the very positive results associated with the application of ultrasonic waves, this filtration technique is likely to become an important industrial process.

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Ultrasound enhancement of microfiltration performance for natural organic matter removal

Cited by 13 publications

References 20 publications

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Ultrasound membrane hybrid processes for dairy wastewater treatment: pilot-scale analysis

Effects of ultrasound on the performance improvement of wastewater microfiltration through a porous ceramic filter

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