Trace organic contaminants in biosolids: Impact of conventional wastewater and sludge processing technologies and emerging alternatives

Semblante, Galilee Uy; Hai, Faisal I.; Huang, Xia; Ball, Andrew S.; Price, William E.; Nghiem, Long D.

doi:10.1016/j.jhazmat.2015.06.037

Cited by 120 publications

(49 citation statements)

References 156 publications

(307 reference statements)

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“…When mechanisms other than hydrophilicity are dominant, pH and redox condition at which the process condition occur can influence the sorption [27,30]. At neutral pH, which is similar to typical wastewater pH of 6.5 − 7.5, sludge particles are dominated by negatively charged carboxyl groups [31].…”

Section: Antibiotic Concentration In the Wastewatermentioning

confidence: 99%

Effect of Sedimentation and Aeration on Antibiotic Resistance Induction in the Activated Sludge Process

Sulfikar

Honda

Noguchi

et al. 2018

J. of Wat. & Envir. Tech.

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The influent of municipal wastewater treatment plants (WWTP) can contain micropollutants such as antibiotics, chlorine, detergents, and biocides. In vitro studies have shown that these micropollutants may induce antibiotic resistance in bacteria. Previous studies have reported increases or decreases of antibiotic-resistant bacteria between the influent and effluent of WWTP in an unpredictable manner. Thus, the triggers of resistance induction in WWTP are largely unknown. To investigate the effects of unit operations in WWTP on antibiotic resistance induction, we incubated sixteen strains of Escherichia coli susceptible to amoxicillin or norfloxacin under simulated conditions of the primary sedimentation tank, aeration tank and final sedimentation tank in sterilized and filtered wastewater from each tank at 25°C for 1, 6 and 2 hours, respectively, which are typical hydraulic retention time of each tank. The minimum inhibition concentration towards amoxicillin or norfloxacin was compared before and after incubation to evaluate the occurrence of induction. We found that resistance to both antibiotics was more likely to increase in the aeration tank than in the primary sedimentation tank or final sedimentation tank. The longer contact time with the wastewater and the aeration are factors that appeared to induce antibiotic resistance in an activated sludge process.

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Section: Antibiotic Concentration In the Wastewatermentioning

confidence: 99%

Effect of Sedimentation and Aeration on Antibiotic Resistance Induction in the Activated Sludge Process

Sulfikar

Honda

Noguchi

et al. 2018

J. of Wat. & Envir. Tech.

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“…Meanwhile, highly hydrophobic contaminants may partition in the solid phase of sludge and accumulate in biosolids. Either pathway potentially results in the dissemination of TrOCs in water bodies and agricultural products (Semblante et al, 2015b).…”

Section: Trace Organic Contaminantsmentioning

confidence: 99%

“…The likelihood of TrOC oxidation during ozonation is determined by its sorption capacity, which is governed by the chemical structure of the contaminant and the characteristics of sludge (e.g. surface charge, organic fraction, and pH) (Semblante et al, 2015b). Generally, TrOCs with octanol-water partitioning coefficient (log D)…”

Section: Trace Organic Contaminantsmentioning

confidence: 99%

“…Additionally, the use of biosolids is hindered by the occurrence of trace organic contaminants (TrOCs), such as pharmaceuticals, personal care products, hormones, pesticides, and industrial chemicals, which are recalcitrant to biological wastewater and sludge treatment. TrOCs may disrupt the endocrine system of wildlife and humans, causing developmental and reproductive abnormalities (Clarke & Cummins, 2015;Semblante et al, 2015b).…”

Section: Introductionmentioning

confidence: 99%

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Holistic sludge management through ozonation: A critical review

Semblante

Hai

Dionysiou

et al. 2017

Journal of Environmental Management

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This paper critically reviews the multidimensional benefits of ozonation in wastewater treatment plants. These benefits include sludge reduction, removal of emerging trace organic contaminants (TrOC) from wastewater and sludge, and resource recovery from sludge. Literature shows that ozonation leads to sludge solubilisation, reducing overall biomass yield. Sludge solubilisation is primarily influenced by ozone dosage, which, in turn, depends on the fraction of ozonated sludge, ozone concentration, and sludge concentration. Additionally, sludge ozonation facilitates the removal of TrOCs from wastewater. On the other hand, by inducing cell lysis, ozonation increases the chemical oxygen demand (COD) and nutrient concentration of the sludge supernatant, which deteriorates effluent quality. This issue can be resolved by implementing resource recovery. Thus far, successful retrieval of phosphorous from ozonated sludge supernatant has been performed. The recovery of phosphorous and other resources from sludge could help offset the operation cost of ozonation, and give greater incentive for wastewater treatment plants to adapt this approach.

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“…The removal mechanisms of phthalates in wastewater treatment processes are biodegradation and adsorption. Biodegradation mostly occurs by cometabolism due to their low concentration which does not allow them to serve as primary carbon source for microbial growth (Chatterjee and Dutta, 2008;Semblante et al, 2015). While as sorption is due to their hydrophobic interactions with activated sludge.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of phthalate removal and risk in biological wastewater treatment systems of developing countries and small communities

Gani

Kazmi

2016

Science of The Total Environment

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Trace organic contaminants in biosolids: Impact of conventional wastewater and sludge processing technologies and emerging alternatives

Cited by 120 publications

References 156 publications

Effect of Sedimentation and Aeration on Antibiotic Resistance Induction in the Activated Sludge Process

Effect of Sedimentation and Aeration on Antibiotic Resistance Induction in the Activated Sludge Process

Holistic sludge management through ozonation: A critical review

Comparative assessment of phthalate removal and risk in biological wastewater treatment systems of developing countries and small communities

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