Factors affecting removal of pharmaceutical substances and estrogens in membrane separation bioreactors

Urase, Taro; Kagawa, Chie; Kikuta, Tomoya

doi:10.1016/j.desal.2004.11.031

Cited by 122 publications

(46 citation statements)

References 9 publications

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“…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). Our results regarding the persistence of the above-mentioned six compounds are consistent with the results obtained from our own preliminary study (Nguyen et al, 2012) and other available studies (Clara et al, 2005;Joss et al, 2005;Urase et al, 2005;Nakada et al, 2006;Kimura et al, 2007;Cirja et al, 2008). Similarly, the presence of the strong electron-donating functional groups (such as hydroxyl and aliphatic) and/or absence of strong electron-withdrawing groups appear to be the reason of the high removal of the other hydrophilic compounds such as acetaminophen and salicylic acid , ibuprofen (Clara et al, 2005;Joss et al, 2005) and estriol (Urase et al, 2005;Hai et al, 2011) (Clara et al, 2005;Joss et al, 2005;Urase et al, 2005;Hai et al, 2011).…”

Section: Removal By Mbr Treatmentsupporting

confidence: 92%

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%

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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“…However at higher concentrations, which may be expected in the wastewater of pharmaceutical manufacturing facilities, they may become inhibitory. While there are a number of limited studies on the removal efficiency of APIs from pharmaceutical manufacturing facilities, it is known that removal efficiency of municipal facilities is dependent on the APIs present in the wastewater (Urase et al, 2005). AS is an efficient method for the removal of some APIs, but not all from municipal facilities (Zwiener and Frimmel, 2003;Castiglioni et al, 2006;Watkinson et al, 2007).…”

Section: Conventional Treatment Methodsmentioning

confidence: 99%

Treatment options for wastewater effluents from pharmaceutical companies

Deegan

Basha

Nolan

et al. 2011

Int. J. Environ. Sci. Technol.

290

126

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“…In the case of the acidic reactor, it is suggested that the removal from the water phase by adsorption took place and the gradual degradation of adsorbed substances on the microbial surface followed. Enhanced removal caused by the promoted adsorption and degradation by low pH operation in MBR was reported for the removal of pharmaceuticals (Urase et al, 2005). It is suggested that the enhanced removal of color by the acidic operation could be explained by the same adsorption -degradation model, though molecular weights of pharmaceuticals would be far smaller than those of colored substances.…”

Section: Possible Mechanism For the Removal Of Colormentioning

confidence: 99%

Removal of Color from Molasses Wastewater Using Membrane Bioreactor with Acidic Condition

Shahata

Omata

Urase

2013

J. of Wat. ^|^ Envir. Tech.

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The advantage of acidic operation below pH of 3 in membrane bioreactors (MBRs) for the treatment of molasses wastewater was examined. Stable operation of both an acidic reactor and a neutral pH reactor was observed for 91 days. Percent COD removal was 48.5% for the acidic reactor and 63.6% for the neutral pH reactor when biologically pretreated molasses wastewater was fed to the reactors. Higher percentage removals of COD (89.0% for the neutral pH reactor and 84.0% for the acidic reactor) were observed, when molasses wastewater (COD 650 mg/L) was directly fed to the reactor because of higher concentration of biologically degradable organic matter in the feed solution. In spite of lower percentage of COD removal in the acidic reactor, higher percentage of color removal was observed spectrophotometrically with the low pH operation. Higher percentage of color removal in the acidic reactor was probably due to the enhanced adsorption of colored substances in the acidic environment followed by gradual biological degradation.

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Factors affecting removal of pharmaceutical substances and estrogens in membrane separation bioreactors

Cited by 122 publications

References 9 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

Treatment options for wastewater effluents from pharmaceutical companies

Removal of Color from Molasses Wastewater Using Membrane Bioreactor with Acidic Condition

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