Membrane fouling and cleaning in microfiltration of activated sludge wastewater

Lim, Adelyn; Bai, Renbi

doi:10.1016/s0376-7388(03)00083-8

Cited by 423 publications

(185 citation statements)

References 24 publications

Supporting

Mentioning

172

Contrasting

Unclassified

Order By: Relevance

“…PSD analysis has also been applied into the activated sludge process to investigate the sludge floc properties (Andreadakis 1993;Barbusinski and Koscielniak 1995;Wilen and Balmer, 1999;Biggs and Lant, 2000;Chaignon et al, 2002;Harikumar et al, 2009). PSD could also be used in the membrane bio-reactor (MBR) studies due to its direct impact on membrane fouling (Shimizu et al, 1997;Wisniewski et al, 2000;Lim and Bai 2003;Stoller 2009). …”

Section: Introductionmentioning

confidence: 99%

Experimental and modeling investigation of sewage solids sedimentation based on particle size distribution and fractal dimension

2009

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Sewage solids are usually characterized by non-specific parameters such as suspended solids. The suspended solids has been shown to be an inadequate index for advanced water treatment processes. In this study, the sewages solids particle size distribution was used to provide more detailed information on sewage characteristic. It is hoped that, by introducing particle size distribution, the mechanism of sewage solids sedimentations can be better understood. The particle size distribution of the domestic sewage was measured by the Malvern® laser scattering technique to link to its settlement efficiency. Experimental results show that 77 % of particle volume was removed during the 90 min settling, of which 71.2 % of particle volume was removed in the initial 30 min. The submicron particles were found to be removed by co-settling with large particles. The fractal dimensions of sewage solids could also be derived from the laser scattering measurement. The fractal dimension could also provide useful information on the shape and density of sewage solids. A mathematical model considering the particle sizes, shapes and density changes was then constructed to simulate the settlement of raw sewage particles. Comparison of the modeling results based on discrete and flocculant settling theory shows that settlement can be better predicted by considering the fractal nature of particles. The particle size distribution and fractal dimension data measured by Malvern® laser scattering technique have been shown to be valuable data for in-depth understanding of the mechanisms of sewage solids sedimentation.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental and modeling investigation of sewage solids sedimentation based on particle size distribution and fractal dimension

2009

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Strategies including development of new membrane materials and membrane modules, modification of feed flow pattern, incorporation of in situ or ex situ cleaning regimes in the membrane unit or a combination therein has been suggested [4] for alleviation of membrane fouling problem.…”

Section: Introductionmentioning

confidence: 99%

Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling

2005

View full text Add to dashboard Cite

K. (2005). Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling. Desalination, 180 (1-3), 89-97. Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling Abstract Exploration of two major commercialized flat-sheet and hollow-fiber membranes in a submerged membrane fungi reactor fed with a synthetic textile wastewater revealed striking differences in the extent and mechanism of fouling between the two types, indicating a case-specific scope of choice between the two for industrial wastewater treatment. The hollow-fiber membrane exhibited fouling with a cake layer composed of fungi and starch, intensity being proportional to the operating flux (0.05-0.3 m/d). Conversely, the flat-sheet membrane suffered from immediate internal pore blocking beyond a critical flux of 0.2 m/d. During the experiment with major constituents of the synthetic wastewater separately, while media containing only starch and only dye induced negligible fouling, flux-dependent pore blocking was evident for both the hollow-fiber (0.288 m/d) and flat-sheet membranes (1.3 m/d) for the mixture of starch and dye. Despite a remarkable 99% color and 97% TOC removal achieved by both membranes, fouling with different modes and intensity for the two types under similar conditions and for the same type of membrane under different exposure conditions warrants development of suitable modules for such recalcitrant wastewater. Tokyo, Tokyo,, Japan. AbstractExploration of two major commercialized flat sheet and hollow fiber membranes in a submerged membrane fungi reactor fed with a synthetic textile wastewater revealed striking difference in extent and mechanism of fouling between the two types, indicating case-specific scope of choice between those for industrial wastewater treatment. The hollow fiber membrane exhibited fouling by cake-layer composed of fungi and starch, intensity being proportional to the operating flux (0.05-0.3 m/d). Conversely, the flat sheet membrane suffered from immediate internal pore-blocking beyond a critical flux of 0.2 m/d. During experiment with major constituents of the synthetic wastewater separately, while media containing only starch and only dye induced negligible fouling, flux-dependent pore-blocking emerged in case of both the hollow fiber (0.288 m/d) and flat sheet membranes (1.3 m/d) for the mixture of starch and dye. Despite a remarkable 99% color and 97% TOC removal achieved by both the membranes, fouling with different mode and intensity for the two types of membranes under similar condition, and for the same type of membrane under different exposure condition warrants development of suitable modules for such recalcitrant wastewater.

show abstract

“…However, in another study, PVDF membranes showed a removable fouling character, with flux being nearly the same as before the operation [27]. Other studies of cake and pore blocking of the membranes also showed that pore blocking and cake formation are the dominant fouling mechanisms in PES membranes [28].…”

Section: Resistancesmentioning

confidence: 88%

Effect of Membrane Type for the Treatment of Organized Industrial Zone (OIZ) Wastewater with a Membrane Bioreactor (MBR): Batch Experiments

Özkan

Uyanik

2017

Water

View full text Add to dashboard Cite

Organized industrial zone (OIZ) wastewater is a mixed wastewater that is contributed by both municipal use and from different industrial sectors. Since MBR has advantages over conventional treatment plants, membrane types and fouling become the most important parameters in the treatment of this kind of wastewater. In this study, six different membrane types were used to find the most suitable membrane with the least resistivity to fouling. Three different microfiltration (MF) and ultrafiltration (UF) membranes were operated to estimate their (i) membrane, (ii) cake, (iii) pore, and (iv) total resistances. The highest total resistance was observed in a polyethersulfone (PES) membrane (3.8 × 10 10 m −1 ), while the lowest one was a UF polyvinylidene fluoride (PVDF) membrane with approximately 20 times lower resistance than the highest one. PVDF membranes showed lower total resistances than PES membranes. An MF or a 250 kDa UF membrane could be operated long-term in a membrane bioreactor with the least fouling potential.

show abstract

Membrane fouling and cleaning in microfiltration of activated sludge wastewater

Cited by 423 publications

References 24 publications

Experimental and modeling investigation of sewage solids sedimentation based on particle size distribution and fractal dimension

Experimental and modeling investigation of sewage solids sedimentation based on particle size distribution and fractal dimension

Different fouling modes of submerged hollow-fiber and flat-sheet membranes induced by high strength wastewater with concurrent biofouling

Effect of Membrane Type for the Treatment of Organized Industrial Zone (OIZ) Wastewater with a Membrane Bioreactor (MBR): Batch Experiments

Contact Info

Product

Resources

About