Microbubble generation for environmental and industrial separations

Burns, Susan E.; Yiacoumi, Sotira; Tsouris, Costas

doi:10.1016/s1383-5866(97)00024-5

Cited by 178 publications

(94 citation statements)

References 19 publications

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“…This result confirms those obtained previously by Edzwald (1995) and Burns et al (1997), who used a photographic technique to obtain average bubble diameter.…”

Section: Average Bubble Diametersupporting

confidence: 92%

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Treatment of milk industry effluent by dissolved air flotation

Couto

Melo

Massarani

2004

Braz. J. Chem. Eng.

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-In this work, the application of the flotation technique by dissolved air (FAD) to the treatment of milk industry effluent (milky effluent) is analyzed. Initially, batch studies were carried out in a column built of acrylic with an external diameter of 2.5 cm and 50 cm in height. Afterwards, the performance of a flotation tank with a 5.5 L capacity in the treatment of the milky effluent was addressed. In continuous mode of operation, separation efficiencies up to 90% were obtained for the experiments carried out at a saturation pressure of 4 atm and having a ratio of feed flow rate (Q a ) to saturated liquid flow rate equal to 1. The separation efficiency for flocculated milk was estimated from the overall mass balance for the flotation tank. Separation efficiencies obtained agreed very well with the experimental results collected for Q a /Q Ls ratios lower than 1.

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“…This result confirms those obtained previously by Edzwald (1995) and Burns et al (1997), who used a photographic technique to obtain average bubble diameter.…”

Section: Average Bubble Diametersupporting

confidence: 92%

“…1) The use of fluid dynamic correlations was found to be a satisfactory procedure to estimate average bubble diameter, since it shows the tendency for this parameter to decrease with an increase in air saturation pressure, which is in accordance with the results of Edzwald (1995) and Burns et al (1997).…”

Section: Discussionsupporting

confidence: 79%

Treatment of milk industry effluent by dissolved air flotation

Couto

Melo

Massarani

2004

Braz. J. Chem. Eng.

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“…Figure 2 shows that interaction effect between current density and salinity is very significant for the following reasons. According to Burns et al (1997) and Hosny et al (1996), a high NaCl concentration reduces the size of bubbles (especially of hydrogen), thereby increasing removal efficiency. High salinity increases the ionic force and reduces the thickness of the double layer, favor the agglomeration of drops and improves contact bubbles generated electrolytically.…”

Section: Nacl Parametermentioning

confidence: 99%

Electroflotation of emulsified oil in industrial wastes evaluated with a full factorial design

Nahui

Nascimento²,

Cavalcanti

et al. 2008

Braz. J. Chem. Eng.

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-The use of electroflotation in emulsified oil wastes was studied. A rectangular electroflotation cell was designed and constructed in acrylic with stainless steel cathode and DSA ® anode with a nominal composition of Ti/Ru 0.34 Ti 0.66 O 2 . The variables studied in the present work were current density and oil, flocculant and electrolyte (NaCl) concentrations. The experiments were carried out in accordance with 2 4 full factorial experimental designs with two center points. The STATISTICA 5.5 software was used for calculations in order to relate experimental data to a statistical model. The best results, yielded 99.71% oil removal were obtained from 1050ppm of emulsified oil feed.

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“…Ushida et al [14] measured the washing rates of FB mixtures applied to cloth and found that the resultant washing rates were larger when using FB mixtures than water alone. Burns et al [15] examined several factors that affected the size of FBs produced by the processes of electroflotation, dissolved air flotation, and a relatively new method known as electrostatic spraying. Fujiwara et al [16] developed FB generation techniques proposed in previous studies.…”

Section: Introductionmentioning

confidence: 99%

Flow Properties of Ultra-Fine Bubble Mixtures Passing through Micro-Apertures

Ushida¹,

Hasegawa²,

Narumi³

et al. 2015

JFCMV

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The flow properties of fine bubble mixture flows are investigated and reported. Few previous studies have focused on ultra-fine bubble (UFB) mixtures, which contain sub-micrometer sized bubbles. In this study, UFB mixtures of water and glycerol solution are passed through micro-sized slits and capillaries, and the resultant pressure drops are evaluated in comparison with those for water and aqueous glycerol alone. The experimentally measured pressure drop for slits (≤51 μm) and capillaries (≤81 μm) is less for UFB mixtures than for water and aqueous glycerol alone. This phenomenon is considered in terms of interface behavior and attributed to the electric interaction between an electric double layer and the UFBs. Furthermore, numerical observation for slip wall conditions is conducted, and the results for UFB mixtures agree with the predicted values for slip wall conditions.

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Microbubble generation for environmental and industrial separations

Cited by 178 publications

References 19 publications

Treatment of milk industry effluent by dissolved air flotation

Treatment of milk industry effluent by dissolved air flotation

Electroflotation of emulsified oil in industrial wastes evaluated with a full factorial design

Flow Properties of Ultra-Fine Bubble Mixtures Passing through Micro-Apertures

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