Removal of assimilable organic carbon and biodegradable dissolved organic carbon by reverse osmosis and nanofiltration membranes

Escobar, Isabel C.; Hong, Seungkwan; Randall, Andrew A.

doi:10.1016/s0376-7388(00)00398-7

Cited by 91 publications

(47 citation statements)

References 22 publications

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“…Uncharged hydrophilic compounds (Table 5) are defined here as compounds with log K ow < 2 and molecular weight below the MWCO of the membrane (category 3-4) or above the MWCO of the membrane (category [8][9]. The compounds tested in this study that are classified in category 3-4 are triethylene glycol, xylitol and xylose; all have high rejections (68-91%).…”

Section: Uncharged Hydrophilic Components (Categories 3-4 and 8-9)mentioning

confidence: 99%

“…A large variation of physico-chemical parameters can be found within this category and because some of these parameters have a significant influence on rejection, the removal of micropollutants from aqueous solution can be very different from component to component. Suggested solute parameters include molecular weight, 1 -3 molecular width or a similar calculated size parameter, 2,4,5 hydrophobicity, 5 -7 dipole moment, 5 pK a , 8 pH 9 and ionic strength. 9,10 Among the membrane parameters, the most cited are molecular weight cut-off, 1,11 pore size, 12 porosity, number of pores or pore density 13 and membrane charge and hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

“…Suggested solute parameters include molecular weight, 1 -3 molecular width or a similar calculated size parameter, 2,4,5 hydrophobicity, 5 -7 dipole moment, 5 pK a , 8 pH 9 and ionic strength. 9,10 Among the membrane parameters, the most cited are molecular weight cut-off, 1,11 pore size, 12 porosity, number of pores or pore density 13 and membrane charge and hydrophobicity. 8,10 Interactions between membrane and solution influencing the rejection are represented by the membrane-water contact angle, 14 diffusivity in the membrane, 15 and organic and colloidal fouling.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of a semi‐quantitative method for estimation of the rejection of organic compounds in aqueous solution in nanofiltration

Bruggen

Verliefde

Braeken

et al. 2006

J of Chemical Tech & Biotech

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A large number of different mechanisms describing the retention of dissolved organic compounds in nanofiltration have been proposed. A recent review identified the parameters possibly involved in the separation performance and suggested a qualitative classification of dissolved compounds. Continuing this approach, a semi-quantitative assessment of the observed rejections in nanofiltration is given in this paper, based on threshold values of key parameters such as molecular weight and molecular weight cut-off (MWCO), molecular size, pH and pK a , hydrophobicity (log K ow ) and membrane charge. Experimental values and literature data were used to provide a broad basis for comparison. It was concluded that (a) all categories that contain hydrophobic components are badly defined, in particular for small components, with rejections varying from low to very high, (b) all components that contain hydrophilic components have relatively high rejections and (c) all categories that contain charged components have well-defined, high rejections (intermediate for membranes with low surface charge). In all cases, the average rejection is higher when the component's molecular weight is larger than the MWCO of the membrane and when the molecular size is larger than the pore size of the membrane.

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Section: Uncharged Hydrophilic Components (Categories 3-4 and 8-9)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of a semi‐quantitative method for estimation of the rejection of organic compounds in aqueous solution in nanofiltration

Bruggen

Verliefde

Braeken

et al. 2006

J of Chemical Tech & Biotech

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“…RO membranes have the potential to remove the organic, inorganic and biological contaminants from saline and ground water 13 . But membrane fouling in RO membrane, limit the use of this process for water treatment.…”

Section: Introductionmentioning

confidence: 99%

Reverse osmosis as one-step wastewater treatment: a case study on groundwater pollution

Ali

Rehman

Younas

et al. 2015

Polish Journal of Chemical Technology

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The present case study is focused on performance evaluation of a Reverse Osmosis (RO) membrane based pilot plant to treat the ground/surface drinking water sources polluted by fl ood, rivers and/or canals. The RO plant was designed, fabricated and then operated with polluted water. Two feed water samples having a TDS of 2.000 mg . L -1 and 10.000 mg . L -1 respectively, were taken and analyzed for physical, chemical and microbiological contaminants. The RO plant was run once through over a span of 100 hrs at an operating pressure of 15 bar. TDS rejections were found to be more than 94% while permeate fl ux was measured to be 25.82 L . m -2 . hr -1 to 40.55 L . m -2 . hr -1 . Results show that RO plant has a potential to remove physical, chemical and microbiological contaminants like Total Coliform and E. Coli in one step.

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“…En effet, elle permet de travailler sous des pressions modérées de 5 à 15 bars (Lhassani et al, 2001) et de séparer de solutés de masses molaires comprise entre 300 et 1000 Dalton (Chen et al, 2002 ). La nanofiltration est largement utilisée pour le traitement des eaux usées, des eaux potables, des eaux colorées, des eaux saumâtres... ( Lhassani et al, 2001 ;Escobar et al, 2000 ;Van der Bruggen et al, 2001, 2001a. L'objectif de ce travail est de procéder à des essais de traitement des effluents de la société de textile SCIM par coagulationfloculation, nanofiltration et par combinaison des procédés de coagulation-floculation-nanofiltration dans le but de déterminer une solution de traitement adaptée aux effluents de cette société.…”

Section: Introductionunclassified

Traitement d’effluents de l’industrie textile par combinaison de procédés de coagulation-floculation-nanofiltration

Abouzaid¹,

Mouzdahir²,

Lhadi³

2005

Environnement, Ingénierie &Amp; Développement

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Des essais de traitement d'effluents de l'industrie textile par coagulation-floculation, nanofiltration et par combinaison coagulation-floculation-nanofiltration ont été effectués. Les résultats montrent que la coagulation-floculation par le sulfate d'aluminium conduit à des abattements de la matière organique de 87% de DCO et de la turbidité de 98% pour une dose de 1,7 g/l d'aluminium élémentaire. Cette méthode de traitement ne permet pas d'éliminer la matière organique soluble ainsi que les sels. Par contre, les résultats de la nanofiltration et de la combinaison coagulation-floculation-nanofiltration ont montré que cette dernière méthode conduit à des abattements de la matière organique de 98% de DCO et des sels de 99,9%. Industrie / textile / rejet / nanofiltration / coagulation-floculation.Treatment of textile effluent by the process coagulationfloculation-nanofiltration. Many attempts of treatment of the effluent of textile industry by coagulation-floculation, nanofiltration and by combined coagulation-floculation-nanofiltration were realised. The results shows that coagulation-floculation loading to reduction of the organic matter of 87% of COD and the turbidity of 98% for a dose of 1.7 g/l of elementary aluminium, but does not eliminate the soluble organic matter and the salts.Then, the membrane filtration process offers an alternative effluent treatment.To avoid the colmatation of the membrane module, we chosed to treat the textile effluent by coagulationfloculation.The solution in the dye bath goes directly to the nanofiltration unit, where the soluble contaminants are retained. Hence, clear water is produced. On other hand, the results of nanofiltration and of combined process coagulation-floculation-nanofiltration showed that last method leads to rejection of the organic matter of 98% of COD and salts of 99,9%. Since, the clear water was produced that can be recycled in company.

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Removal of assimilable organic carbon and biodegradable dissolved organic carbon by reverse osmosis and nanofiltration membranes

Cited by 91 publications

References 22 publications

Assessment of a semi‐quantitative method for estimation of the rejection of organic compounds in aqueous solution in nanofiltration

Assessment of a semi‐quantitative method for estimation of the rejection of organic compounds in aqueous solution in nanofiltration

Reverse osmosis as one-step wastewater treatment: a case study on groundwater pollution

Traitement d’effluents de l’industrie textile par combinaison de procédés de coagulation-floculation-nanofiltration

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