Study on ultrafiltration for surface water by a polyvinylchloride hollow fiber membrane

Guo, Xiaoyan; Zhang, Zhenjia; Lin, Fang; Liguo, SU

doi:10.1016/j.desal.2007.11.064

Cited by 57 publications

(37 citation statements)

References 13 publications

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“…UF membranes are physical barriers that are able to efficiently remove suspended particles and colloids [4,5], turbidity, bacteria, algae, parasites, and viruses for clarification and disinfection purposes [5], as well as to control trihalomethane precursors [6]. In comparison with conventional processes such as coagulation, flocculation, sedimentation and/or flotation, and rapid or slow sand filtration, UF technology has many advantages such as superior quality of treated water, much greater compactness, easier control of operation and maintenance, use of fewer chemicals, and lower production of sludge.…”

Section: Introductionmentioning

confidence: 99%

Performance of a coagulation–ultrafiltration hybrid process for water supply treatment

Bergamasco

Moraes

Vieira

et al. 2011

Chemical Engineering Journal

110

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a b s t r a c tThe combination of coagulation/flocculation and ultrafiltration in the process of drinking water treatment was investigated using natural (chitosan) and chemical (aluminum sulfate) coagulants. A 0.1 m singlechannel membrane was applied at pressures of 1 bar and 2 bar, using the principle of crossflow filtration. The final produced water quality was assessed considering the efficiency of removal of color, turbidity, COD, and compounds that absorb UV at 254 nm, among other physico-chemical and microbiological parameters. The coagulation/flocculation with chitosan as coagulant (CFQ) was efficient in removing compounds that add color and turbidity and that absorb UV at 254 nm, with levels that were very similar to those obtained with the coagulation/flocculation process with aluminum sulfate as coagulant (CFS). Performance evaluation of the hybrid systems (CFS-UF and CFQ-UF) showed that the permeate quality was increased when compared with individually operated systems (UF, CFS, and CFQ). The CFQ-UF process caused higher membrane fouling (79% at 2 bar), but yielded a higher stabilized permeate flux, which was approximately twice that achieved with CFS-UF. Based on the results, one can say that chitosan has a potential application as natural coagulant in CF-UF hybrid processes for treating drinking water with relatively high turbidity.

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Section: Introductionmentioning

confidence: 99%

Performance of a coagulation–ultrafiltration hybrid process for water supply treatment

Bergamasco

Moraes

Vieira

et al. 2011

Chemical Engineering Journal

110

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“…Polyvinyl chloride (PVC), as a conventional and widely applied polymer, possessed superior performance, such as low cost, excellent physical, chemical (e.g., acids, alkalis and solvent resistances) and mechanical properties [19,20]. Thus, PVC had been widely used to prepare membranes [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

et al. 2015

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“…The mass balance calculated with the measured loadings of pollutants in the feed, permeate and retentate indicated that, independently of the operational conditions, 34-40% of COD and 30-31% of DOC were adsorbed on the surface of a membrane, and as a consequence, the concentrations in the retentate were not as large as expected. In addition to size exclusion, adsorption is considered a mechanism of organic compound rejection, in which particles are caught inside the structure of the membrane (Guo et al 2009). …”

Section: Fine-uf and Pac-fine-ufmentioning

confidence: 99%

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

Kulikowska

Zielińska

Konopka

2018

Int. J. Environ. Sci. Technol.

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This study investigated the feasibility of using an adsorption-fine-ultrafiltration system for removing organics from stabilized landfill leachate. For adsorption, Norit SX2 powdered activated carbon was used; the fine-ultrafiltration system was equipped with a ceramic membrane. Due to low organics removal efficiency in fine-ultrafiltration alone (series 1) (46.5% of chemical oxygen demand, 22.1% of dissolved organic carbon), two doses of activated carbon were used for adsorption before fine-ultrafiltration: 0.2 g/L (series 2) and 1 g/L (series 3). Although organics removal efficiency at both doses of Norit SX2 differed (12.9 and 34.5% of chemical oxygen demand, 12.2 and 54.7% of dissolved organic carbon, at 0.2 and 1 g/L, respectively), permeate quality did not differ substantially. Although the use of Norit SX2 improved permeate quality in comparison with fine-ultrafiltration alone (220 mg/L in series 2 and 209 mg/L in series 3 vs. 842 mg/L in series 1), its particles blocked the membrane and lowered the permeate flux even at the lower dose. In the series with adsorption, permeate flux was about 10 times lower than during fine-ultrafiltration alone. This indicates that, in fine-ultrafiltration preceded by adsorption on activated carbon, it is reasonable to use the lower dose of Norit SX2 because the efficiency of treatment is similar to that at the higher dose, but the reduction in permeate flux is somewhat less. These results indicate that the possibility of using adsorption-fine-ultrafiltration in the practice of leachate treatment is limited because of blocking membrane pores with particles of activated carbon.

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Study on ultrafiltration for surface water by a polyvinylchloride hollow fiber membrane

Cited by 57 publications

References 13 publications

Performance of a coagulation–ultrafiltration hybrid process for water supply treatment

Performance of a coagulation–ultrafiltration hybrid process for water supply treatment

Study on interface structure and performance of homogeneous-reinforced polyvinyl chloride hollow fiber membranes

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

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