Reducing fouling and boundary-layer by application of helical flow in ultrafiltration module employed for radioactive wastes processing

Zakrzewska-Trznadel, G.; Harasimowicz, M.; Miśkiewicz, Agnieszka; Jaworska, A.; Dłuska, E.; Wroński, S.

doi:10.1016/j.desal.2007.10.091

Cited by 26 publications

(18 citation statements)

References 14 publications

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“…In the apparatus, the SIKA-R 0.1 AS (GKN Sinter Metals) tubular metallic membrane was used with the subsequent chemical composition: 65-72% Fe, 16-18% Cr, 10-14% Ni, 2-3% Mo, and of ∼0.1 m medium pore size. The main dimensions and characteristics of the helical membrane module components were reported more detailed elsewhere [3,18].…”

Section: Methodsmentioning

confidence: 99%

“…[3]. The approximation of K-value was considered just to ascertain the influence of the rotation on permeate flux and to reveal the tendency of ı-value variation.…”

Section: Approximation Of Gel Layer Formationmentioning

confidence: 99%

“…In case of PAUF experiments, the cake layer is equivalent with polymer layer formation. Thus, permeate flux can be expressed as a function of total membrane-polymer ("cake") resistance by using the following equation [3]:…”

Section: Approximation Of Gel Layer Formationmentioning

confidence: 99%

“…For instance, in the work [31] cobalt and nickel ions were simultaneously removed from aqueous feed using crossflow MEUF. Few studies [3,18] deal with the shearenhanced PAUF process. Therefore, the further investigations on Nomenclature a 0 , a 1 , .…”

Section: Introductionmentioning

confidence: 99%

“…One of the effective methods to reduce these adverse phenomena is the enhancement of hydrodynamic conditions in the membrane module by promoting the turbulence close to the surface of the membrane [3]. This process known as dynamic or shear-enhanced filtration consists in creating the shear rate at the membrane surface by rotating disks [4][5][6][7][8][9][10][11][12][13][14][15], rotating membrane or filter [4,16,17], rotating shaft [3,18] or by vibration systems known also as vibratory shear-enhanced processing, VSEP [4,7,10,[19][20][21][22]. Likewise, the helical, stamped or corrugated membranes as well as screw thread inserts in tubular membranes can improve the hydrodynamic conditions by producing the centrifugal instabilities called Dean vortices [2,[23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Removal of cobalt ions from aqueous solutions by polymer assisted ultrafiltration using experimental design approach

Cojocaru

Zakrzewska-Trznadel

Miśkiewicz

2009

Journal of Hazardous Materials

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Section: Methodsmentioning

confidence: 99%

“…[3]. The approximation of K-value was considered just to ascertain the influence of the rotation on permeate flux and to reveal the tendency of ı-value variation.…”

Section: Approximation Of Gel Layer Formationmentioning

confidence: 99%

Section: Approximation Of Gel Layer Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Removal of cobalt ions from aqueous solutions by polymer assisted ultrafiltration using experimental design approach

Cojocaru

Zakrzewska-Trznadel

Miśkiewicz

2009

Journal of Hazardous Materials

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Membrane‐Based Techniques for Nuclear Waste Processing

Pabby

Sonawane

Sastre

2013

Encyclopedia of Membrane Science and Technology

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Membrane methods can be considered as the most energy‐saving separation techniques. Separation abilities of membranes allow the elimination of many noneffective and energy‐consuming methods and their replacement by new, modern technologies that are environment friendly. Application of membrane methods for the treatment of liquid radioactive wastes (LRWs) requires solving many problems connected with the proper selection of the membranes, membrane modules, and other equipment according to local conditions: chemical and radiochemical composition of the effluents treated, their activity, and total salinity. For the past few years, membrane‐based processing of a nuclear plant's radioactive wastes, radioactive liquids in general, is rapidly gaining acceptance within the nuclear industry. Installations working in the nuclear industry have to fulfill very stringent requirements. They ought to be reliable, and constructed from special materials defined by separate regulations. This article focuses on existing information on the application of membrane technology in the nuclear industry and covers recent advances, particularly in the field of LRW processing on pilot and plant scales.

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A novel microwave air heater integrated with thermal energy storage

Yek

Lau²,

Lau³

et al. 2022

Intl J of Energy Research

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Summary Conventional heater is limited by the time and energy‐consuming design, showing high energy loss and causing a negative impact to the environment. A novel air heater integrated with microwave heating and activated carbon (AC) as thermal energy storage has been developed in this study to investigate the heat transfer efficiency in a helical coil. Microwave radiation provides volumetric heating to the AC, which acts as a microwave absorbent to absorb and convert microwave energy into heat energy for storage and subsequently heating the helical coil that in turn heats the air indirectly. The helical coil exerted centrifugal force and induced secondary flow to significantly enhance the heat transfer. Microwave radiation induced a high heating rate of 30°C/min to heat the AC. Low heat loss (6.12°C/min) was shown during the cooling down of AC, indicating high heat retention by the AC. Then, the convective heat transfer between helical coil and air with over a range of AC temperatures was examined. The highest overall heat transfer coefficient (U0) and coefficient of performance (COP) with various AC temperatures were recorded at 310.815 W/normalm2·°C and 3.958, respectively, at 50 L/min of air flow rate. Nusselt number, Reynolds number, and Dean number were increased with higher air flow rate. The experimental results showed good agreement with literature where convective heat transfer in the helical coil is more efficient at the high‐temperature region as well as when higher flow rate was applied. The use of microwave air heater shows a potentially high efficiency of energy‐saving with capacity to generate hot air at 100°C to 250°C in about 26 min after switching on the microwave oven.

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Reducing fouling and boundary-layer by application of helical flow in ultrafiltration module employed for radioactive wastes processing

Cited by 26 publications

References 14 publications

Removal of cobalt ions from aqueous solutions by polymer assisted ultrafiltration using experimental design approach

Removal of cobalt ions from aqueous solutions by polymer assisted ultrafiltration using experimental design approach

Membrane‐Based Techniques for Nuclear Waste Processing

A novel microwave air heater integrated with thermal energy storage

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