The fate of pharmaceuticals, steroid hormones, phytoestrogens, UV-filters and pesticides during MBR treatment

Wijekoon, Kaushalya C.; Hai, Faisal I.; Kang, Jinguo; Price, William E.; Guo, Wenshan; Ngo, Huu Hao; Nghiem, Long D.

doi:10.1016/j.biortech.2013.06.097

Cited by 162 publications

(85 citation statements)

References 28 publications

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“…6b). This observation is also in line with Wijekoon et al (2013) who attributed the low residual concentrations of these hydrophobic compounds to their high biodegradability.…”

Section: Impact Of Salinity Build-up On Troc Adsorption On Sludgesupporting

confidence: 90%

“…6a). The low accumulation of hydrophilic compounds in the sludge phase has been reported by Wijekoon et al (2013). By contrast, the relatively high concentrations of these four chemicals in the biosolids were due to their moderate hydrophobicity and/or less biodegradability.…”

Section: Impact Of Salinity Build-up On Troc Adsorption On Sludgementioning

confidence: 71%

“…TrOCs adsorbed on the sludge were extracted by a solvent extraction method described by Wijekoon et al (2013). The sludge samples were freeze-dried using a Freeze Dryer (Alpha 1-2 LD plfx, Christ GmbH, Germany) and then ground to powder.…”

Section: Analysis Of Trace Organic Chemicalsmentioning

confidence: 99%

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Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors

Luo

Hai

Kang

et al. 2015

Bioresource Technology

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Nghiem, L. D. (2015). Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors. Bioresource Technology, 177 274-281.Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors AbstractThis study investigated the impact of salinity build-up on the performance of membrane bioreactor (MBR), specifically in terms of the removal and fate of trace organic chemicals (TrOCs), nutrient removal, and biomass characteristics. Stepwise increase of the influent salinity, simulating salinity build-up in high retention MBRs, adversely affected the metabolic activity in the bioreactor, thereby reducing organic and nutrient removal. The removal of hydrophilic TrOCs by MBR decreased due to salinity build-up. By contrast, with the exception of 17α-ethynylestradiol, the removal of all hydrophobic TrOCs was not affected at high salinity. Moreover, salinity build-up had negligible impact on the residual accumulation of TrOCs in the sludge phase except for a few hydrophilic compounds. Additionally, the response of the biomass to salinity stress also dramatically enhanced the release of both soluble microbial products (SMP) and extracellular polymeric substances (EPS), leading to severe membrane fouling. Additionally, the response of the biomass to salinity stress also dramatically enhanced the release of both soluble microbial products and extracellular polymeric substances, leading to severe membrane fouling. Disciplines Engineering | Science and Technology Studies

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“…6b). This observation is also in line with Wijekoon et al (2013) who attributed the low residual concentrations of these hydrophobic compounds to their high biodegradability.…”

Section: Impact Of Salinity Build-up On Troc Adsorption On Sludgesupporting

confidence: 90%

Section: Impact Of Salinity Build-up On Troc Adsorption On Sludgementioning

confidence: 71%

See 1 more Smart Citation

Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors

Luo

Hai

Kang

et al. 2015

Bioresource Technology

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“…The sludge within the sponge cubes was collected by squeezing the cubes. Subsequently, the micropollutants were extracted from sludge using the method previously described by Wijekoon et al (2013).…”

Section: Batch Experimentsmentioning

confidence: 99%

Removal and fate of micropollutants in a sponge-based moving bed bioreactor

Luo

Guo

Ngo

et al. 2014

Bioresource Technology

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This study investigated the removal of micropollutants using polyurethane sponge as attached-growth carrier. Batch experiments demonstrated that micropollutants could adsorb to non-acclimatized sponge cubes to varying extents. Acclimatized sponge showed significantly enhanced removal of some less hydrophobic compounds (logD < 2.5), such as ibuprofen, acetaminophen, naproxen, and estriol, as compared with nonacclimatized sponge. The results for bench-scale sponge-based moving bed bioreactor (MBBR) system elucidated compound-specific variation in removal, ranging from 25.9% (carbamazepine) to 96.8% (bEstradiol 17-acetate) on average. In the MBBR system, biodegradation served as a major removal pathway for most compounds. However, sorption to sludge phase was also a notable removal mechanism of some persistent micropollutants. Particularly, carbamazepine, ketoprofen and pentachlorophenol were found at high concentrations (7.87, 6.05 and 5.55 lg/g, respectively) on suspended biosolids. As a whole, the effectiveness of MBBR for micropollutant removal was comparable with those of activated sludge processes and MBRs. AbstractThis study investigated the removal of micropollutants using polyurethane sponge as attached-growth carrier. Batch experiments demonstrated that micropollutants could adsorb to non-acclimatized sponge cubes to varying extents. Acclimatized sponge showed significantly enhanced removal of some less hydrophobic compounds (log D < 2.5), such as ibuprofen, acetaminophen, naproxen, and estriol, as compared with nonacclimatized sponge. The results for bench-scale sponge-based moving bed bioreactor (MBBR) system elucidated compound-specific variation in removal, ranging from 25.9%(carbamazepine) to 96.8% (β-Estradiol 17-acetate) on average. In the MBBR system, biodegradation served as a major removal pathway for most compounds. However, sorption to sludge phase was also a notable removal mechanism of some persistent micropollutants. Particularly, carbamazepine, ketoprofen and pentachlorophenol were 2 found at high concentrations (7.87, 6.05 and 5.55 µg/g, respectively) on suspended biosolids. As a whole, the effectiveness of MBBR for micropollutant removal was comparable with those of activated sludge processes and MBRs.

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“…Indeed, the high biomass concentrations and long SRTs can offer favorable conditions for more efficient biodegradation of refractory organic micropollutants. The potential presence and growing concerns of TrOCs such as pharmaceutical and personal care products (PPCPs), steroid hormones, pesticides and heavy metals in the aquatic environment enforced many researches into their fate in wastewater treatment processes [8].…”

Section: Introductionmentioning

confidence: 99%

Incorporating Submerged MBR in Conventional Activated Sludge Process for Municipal Wastewater Treatment: A Feasibility and Performance Assessment

Gurung¹,

Ncibi²,

Fontmorin³

et al. 2016

J Membra Sci Technol

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A pilot-scale submerged membrane bioreactor (MBR) was incorporated in a conventional activated sludge (CAS) process for more than 100 days in order to assess the feasibility and performance on the municipal wastewater treatment. After a stabilization period of 50 days, the MBR unit was operated under various temperatures (21 ± 4°C), mixed liquor suspended solids (MLSS) concentrations (14000 ± 1800 mg L -1 ), and different aeration intensities (3 to 6 m 3 h -1 ). No significant deterioration in membrane flux was observed while operating with high biomass concentration. From the results, the removal of total suspended solids (TSS), chemical oxygen demand (COD), total phosphorus (TP) were enhanced using MBR. However, due to some limiting operational conditions, the total nitrogen (TN) removal was less efficient in MBR than in CAS. The MBR unit was 100% effective in removing E. coli and enterococcus, as well as noroviruses and adenovirus, making it more efficient than CAS. Also, the removal of most of the trace organic compounds (TrOCs) including personal care products, pharmaceuticals, steroid hormones and perfluorinated compounds were enhanced after the incorporation of MBR to CAS, as well as for many heavy metals in MBR.

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The fate of pharmaceuticals, steroid hormones, phytoestrogens, UV-filters and pesticides during MBR treatment

Cited by 162 publications

References 28 publications

Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors

Effects of salinity build-up on biomass characteristics and trace organic chemical removal: Implications on the development of high retention membrane bioreactors

Removal and fate of micropollutants in a sponge-based moving bed bioreactor

Incorporating Submerged MBR in Conventional Activated Sludge Process for Municipal Wastewater Treatment: A Feasibility and Performance Assessment

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