Use of submerged microfiltration membranes for glass industry wastewater reclamation: pilot-scale testing and membrane cleaning

Kang, Suck-Ki; Choo, Kwang‐Ho

doi:10.1016/j.desal.2005.06.029

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…Here, the yield stress was assumed to be the offset stress at a strain of 2% (i.e., the offset yield stress, s 2% ). 7 Although the polymer material generally showed a strain rate effect during both elastic and plastic deformation, the result shows Fig. 6(a).…”

Section: Finite Element Simulationmentioning

confidence: 90%

“…This computation result agrees with our model with a primary element type. 7 The offset yield stress (proof stress) is usually set to s 0. 2 little effect on the stress-strain curve in Fig.…”

Section: Finite Element Simulationmentioning

confidence: 99%

“…In practical operation, the accumulation of foulants on the membrane is a major obstacle to the efficient use of membrane processes. Such accumulation is routinely mitigated by physical cleaning [4][5][6][7], which includes air scrubbing, which causes the HF membranes to mechanically vibrate, consequently leading to detachment of accumulated contaminants from the membrane surface. Strong repetitive cleaning also potentially leads to fatigue damage of the HF membrane; in practice, breakage of the HF membrane on the edge of the potting in membrane modules is common [8].…”

Section: Introductionmentioning

confidence: 99%

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Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Iio

Yonezu

Yamamura

et al. 2016

Journal of Membrane Science

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a b s t r a c tThe tensile deformation behavior of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollowfiber (HF) membranes was studied. The membranes had submicron pores with a three-dimensional open-cell structure. The surface and cross section of the porous membranes were observed by FESEM (field emission scanning electron microscope) to investigate the microstructure of the cell, namely, its size and ligament geometry. During uniaxial tensile tests, the membranes underwent elastic deformation and plastic deformation. Large deformation induced pore growth along the tensile direction, resulting in an increase in water permeability. In order to establish a mechanical model for tensile deformation, the finite element method (FEM) was employed. In this model, the Kelvin polyhedron (truncated octahedron structure) was used to mimic a three-dimensional open-cell structure. A one-unit cell based on this structure was created, and a periodical boundary condition was employed for the FEM computation. The FEM model could reproduce the overall elastoplastic deformation behavior of the porous membrane and provide useful insight into the fabrication of porous membranes and reliable operation of water purification.

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Section: Finite Element Simulationmentioning

confidence: 90%

Section: Finite Element Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Iio

Yonezu

Yamamura

et al. 2016

Journal of Membrane Science

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“…Kang and Choo [21] proposed a microfiltration/ultrafiltration (MF/UF) technique as an alternative for the existing coagulation and sand filtration processes for the separation of fine clay and glass particles, with the aim to reuse the treated water in the glass manufacturing process. In addition, the same authors [22] tested a pilot-scale MF system, combining two types of submerged membranes, for the reclamation and reuse of glass industry wastewater. Lee et al [23] developed nanofiltration coupled with lime-precipitation for removal of scale-forming ions, such as calcium, sulphates and silicates, from crystal glass wastewaters, in order to obtain recycled water of high quality.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Lead and Antimony Ions from the Crystal Glass Wastewaters Utilising Adsorption

2021

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The presented research examined five adsorbents, i.e., zeolite 4A, a mixture of three zeolites (4A, 13X, and ZSM-5), natural zeolite (tuff), activated carbon, and peat, and their potential capability for removal of exceeded ions of lead (Pb), antimony (Sb), sulphates (SO42−), and fluorides (F−) from real wastewater generated in the crystal glass industry, which was previously treated in-situ by flocculation, with the aim to attain the statutory values for discharge into watercourses or possible recycling. The screening experiment evidenced that the tuff was the most suitable adsorbent for the reduction of Pb (93.8%) and F− (98.1%). It also lowered wastewater’s pH sufficiently from 9.6 to 7.8, although it was less appropriate for the reduction of Sb (66.7%) as compared to activated carbon (96.7%) or peat (99.9%). By adjusting the pH of the initial wastewater to pH 5, its adsorption capacity even enlarged. Results from the tuff-filled column experiment revealed reduction of Pb up to 97%, Sb up to 80%, and F− up to 96%, depending on the velocity flow, and thus it could be used for post-treatment (and recycling) of wastewaters from the crystal glass industry. Moreover, the system showed an explicit buffering capacity, but negligible reduction of the SO42−.

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“…In this work we report on a technique to populate the membrane with bubbles which allows to keep the US driving at low amplitudes. The cost evaluation of these two options could be compared in a similar way to that shown by Kang and Choo [115].…”

Section: Discussionmentioning

confidence: 99%

Acoustic cavitation in emerging applications : membrane cleaning and flow processing

Prabowo¹

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Using theoretical and experimental methods, we investigate potential applications of acoustic cavitation bubbles for cleaning and flow processing. An important physical parameter for a successful cleaning is the wall shear stress generated on the contaminated surface. In this thesis, a theoretical investigation of wall shear stress generated from weakly oscillating bubbles near a rigid boundary was conducted. We approximate the effect of the rigid boundary using image theory. The important damping parameters, i.e. acoustic, viscous, and thermal damping, are included for radially oscillating bubbles. The model is a modified Keller-Miksis equation for two interacting bubbles. For small-amplitude oscillations, we obtain an analytical solution for the wall shear stress. Parameter study finds that the wall shear stress has maxima with varying frequency, equilibrium bubble radius, lateral distance, and viscosity. At resonance, we observe maximum

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Use of submerged microfiltration membranes for glass industry wastewater reclamation: pilot-scale testing and membrane cleaning

Cited by 13 publications

References 27 publications

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Deformation modeling of polyvinylidenedifluoride (PVDF) symmetrical microfiltration hollow-fiber (HF) membrane

Reduction of Lead and Antimony Ions from the Crystal Glass Wastewaters Utilising Adsorption

Acoustic cavitation in emerging applications : membrane cleaning and flow processing

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