Removal of trace organics by MBR treatment: The role of molecular properties

Tadkaew, Nichanan; Hai, Faisal I.; McDonald, James A.; Khan, Stuart J.; Nghiem, Long D.

doi:10.1016/j.watres.2011.01.023

Cited by 424 publications

(256 citation statements)

References 53 publications

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“…These results are consistent with several previous studies in which the high removal efficiency of hydrophobic trace organic contaminants from the aqueous phase was attributed to their adsorption to the activated sludge potentially followed by biodegradation in the reactor (Visvanathan et al, 2005;Wells, 2006;Hernández-Leal et al, 2011;Tadkaew et al, 2011;Nguyen et al, 2012). Notably, because the membrane in an MBR serves as a complete barrier to suspended solids, hydrophobic trace organic contaminants can also adsorb onto cake layer over the membrane.…”

Section: Removal By Mbr Treatmentsupporting

confidence: 92%

“…As suggested by the consistent levels of TOC and TN removal and other parameters describing sludge stability (Section 3.1), it can be stated that a stable operation of the MBR could be maintained over the 196 day duration of this study. Therefore, the low and/or variable removal of these compounds can be attributed to their low hydrophobicity and the presence of strong electron-withdrawing functional groups (such as chlorine, amide, and carboxylic) in their molecular structures (Supplementary Data Table S1) (Tadkaew et al, 2011). In fact, significant variations in the removal of hydrophilic and biologically persistent compounds in the same study and between different studies have been reported in the literature for both MBR and CAS (Clara et al, 2005;Nakada et al, 2006;Tadkaew et al, 2011).…”

Section: Removal By Mbr Treatmentmentioning

confidence: 95%

“…Basic parameters including TOC, TN, mixed liquor suspended solids (MLSS) content, mixed liquor volatile suspended solids (MLVSS) content, supernatant turbidity, sludge volume index (SVI) and specific oxygen uptake rate (SOUR) were measured according to the standard methods utilised in our previous studies Tadkaew et al, 2011). Images of the GAC surface before and after use in the GAC column (at the end of 18,000 BV of operation over 93 days) was taken by a scanning electron microscope (SEM) (JCM-6000 NeoScope, JEOL, Japan) to detect any potential biomass growth.…”

Section: Analysis Of Trace Organic Contaminants and Other Basic Parammentioning

confidence: 99%

“…In comparison to CAS, MBR has been reported to show relatively better and/or more stable removal of trace organic contaminants possessing moderate to high biodegradability (Clara et al, 2005;De Wever et al, 2007). Although the effectiveness of MBR treatment for eliminating trace organic contaminants has been well demonstrated in the literature, recent studies have also shown the limitation of MBR in removing certain persistent compounds (Clara et al, 2005;Joss et al, 2005;Tadkaew et al, 2011). Therefore, it is necessary to implement a post-treatment process after MBR particularly in indirect potable water recycling applications or when discharging the effluent to an ecologically sensitive environment.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds

Nguyen

Hai

Kang

et al. 2013

Journal of Environmental Management

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Nghiem, L. D. (2013). Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds. Journal of Environmental Management, 119 173-181.Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds AbstractThis study investigated the removal of trace organic contaminants by a combined membrane bioreactorgranular activated carbon (MBR-GAC) system over a period of 196 days. Of the 22 compounds investigated here, all six hydrophilic compounds with electron-withdrawing functional groups (i.e., metronidazole, carbamazepine, ketoprofen, naproxen, fenoprop and diclofenac) exhibited very low removal efficiency by MBR-only treatment. GAC post-treatment initially complemented MBR treatment very well; however, a compound-specific gradual deterioration of the removal of the above-mentioned problematic compounds was noted. While a 20% breakthrough of all four negatively charged compounds namely ketoprofen, naproxen, fenoprop and diclofenac occurred within 1000-3000 bed volumes (BV), the same level of breakthrough of the two neutral compounds metronidazole and carbamazepine did not occur until 11,000 BV. Single-solute isotherm parameters did not demonstrate any discernible correlation individually with any of the parameters that may govern adsorption onto GAC, such as log D, number of hydrogen-bond donor/acceptor groups, dipole moment or aromaticity ratio of the compounds. The isotherm data, however, could differentiate the breakthrough behaviour between negatively charged and neutral trace organic contaminants. © 2013 Elsevier Ltd. AbstractThis study investigated the removal of trace organic contaminants by a combined membrane bioreactor -granular activated carbon (MBR-GAC) system over a period of 196 days. Of the 22 compounds investigated here, all six hydrophilic compounds with electronwithdrawing functional groups (i.e., metronidazole, carbamazepine, ketoprofen, naproxen, fenoprop and diclofenac) exhibited very low removal efficiency by MBR-only treatment. GAC post-treatment initially complemented MBR treatment very well; however, a compoundspecific gradual deterioration of the removal of the above-mentioned problematic compounds was noted. While a 20% breakthrough of all four negatively charged compounds namely ketoprofen, naproxen, fenoprop and diclofenac occurred within 1,000 -3,000 bed volumes (BV), the same level of breakthrough of the two neutral compounds metronidazole and carbamazepine did not occur until 11,000 BV. Single-solute isotherm parameters did not demonstrate any discernible correlation individually with any of the parameters that may govern adsorption onto GAC, such as log D, number of hydrogen-bond donor/acceptor groups, dipole moment or aromaticity ratio of the compounds. The isotherm data, however, could differentiate the breakthrough behavior between negatively ...

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Section: Removal By Mbr Treatmentsupporting

confidence: 92%

Section: Removal By Mbr Treatmentmentioning

confidence: 95%

Section: Analysis Of Trace Organic Contaminants and Other Basic Parammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds

Nguyen

Hai

Kang

et al. 2013

Journal of Environmental Management

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“…For example, a study on the removal of trace organics by membrane bioreactor treatment showed high removal efficiencies for compounds bearing electron donating functional groups such as hydroxyl and primary amine groups (Tadkaew et al 2011). Similarly, another study described the preferred biotransformation pathway of amide-containing compounds as a function of structural and electronic descriptors (Hebling et al 2010).…”

Section: 3mentioning

confidence: 99%

Occurrence and in-stream attenuation of wastewater-derived pharmaceuticals in Iberian rivers

Acuña

Schiller

García-Galán

et al. 2015

Science of The Total Environment

108

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Amultitude of pharmaceuticals enter surface waters via discharges of wastewater treatment plants (WWTPs), and many raise environmental and health concerns. Chemical fate models predict their concentrations using estimates of mass loading, dilution and in-stream attenuation. However, current comprehension of the attenuation rates remains a limiting factor for predictive models.We assessed in-stream attenuation of 75 pharmaceuticals in 4 river segments, aiming to characterize in-stream attenuation variability among different pharmaceutical compounds, as well as among river segments differing in environmental conditions. Our study revealed that in-streamattenuation was highly variable among pharmaceuticals and river segments and that none of the considered pharmaceutical physicochemical and molecular properties proved to be relevant in determining the mean attenuation rates. Instead, the octanol–water partition coefficient (Kow) influenced the variability of rates among river segments, likely due to its effect on sorption to sediments and suspended particles, and therefore influencing the balance between the different attenuation mechanisms (biotransformation, photolysis, sorption, and volatilization). The magnitude of themeasured attenuation rates urges scientists to consider themas important as dilutionwhen aiming to predict concentrations in freshwater ecosystemsThis research was supported by aMarie Curie European Reintegration Grant (PERG07-GA-2010-259219) and by a Marie Curie Career Integration Grant (PCIG9-GA-2011-293535) within the 7th European Community Framework Programme, aswell as by the SpanishMinistry of Economy and Competitiveness through the projects SCARCE (Consolider-Ingenio 2010 CSD2009-00065) and ENDERUS (CTM-2009-13018), and the postdoctoral grants “Juan de la Cierva” (jci-2009-05604 and jci-2010- 06397), and by the European Union through the European Regional Development Fund (FEDER). This work was partly supported by the Generalitat de Catalunya (Consolidated Research Group: Water and Soil Quality Unit 2009-SGR-965

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Sustainable Membrane Bioreactor Wastewater Treatment

Kim¹

2019

Encyclopedia of Water

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Membrane bioreactor (MBR) has been widely applied for wastewater treatment and reuse. Many efforts have been made to achieve sustainability of the MBR technology with respect to energy reduction and effluent quality improvements. In this article, key aspects to enhance sustainability of the MBR technology in wastewater treatment and reuse applications are discussed. The MBR performance treating wastewaters is mainly limited by membrane fouling which is a long‐standing problem in the MBR operation. Recently, successful attempts have been made to develop fouling mitigation ways at low energy consumptions required. Breakthrough effects have been reported in the field of anaerobic MBR technology to achieve energy‐positive wastewater treatment process with enhancement in membrane permeate flux and recovery of bioenergy. Trace organic contaminants are becoming major concerns, particularly in wastewater reuse applications due to population growth and complexity of wastewater sources. To enhance both permeability quality and energy recovery, there is much attention to be addressed by innovating hybrid MBR systems while their economic feasibility still needs to be proven.

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Removal of trace organics by MBR treatment: The role of molecular properties

Cited by 424 publications

References 53 publications

Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds

Coupling granular activated carbon adsorption with membrane bioreactor treatment for trace organic contaminant removal: Breakthrough behaviour of persistent and hydrophilic compounds

Occurrence and in-stream attenuation of wastewater-derived pharmaceuticals in Iberian rivers

Sustainable Membrane Bioreactor Wastewater Treatment

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