Trace Organic Compound Indicator Removal During Conventional Wastewater Treatment

Salveson, Andrew; Rauch-Williams, Tanja; Dickenson, Eric; Drewes, Jörg E.; Drury, Douglas D.; McAvoy, Drew C.; Snyder, Shane A.

doi:10.2166/9781780400518

Cited by 5 publications

(14 citation statements)

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Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 89%

“…The 4 pharmaceuticals that were measured in the present study were assessed because they are relevant indicators for monitoring changes in wastewater effluent treatment [45]. For example, ibuprofen and naproxen are 2 pharmaceuticals that are typically removed when the plants include nitrifying steps in the treatment, which diminishes the amount of ammonia in the final effluent [45]. The reduced ammonia, ibuprofen, and naproxen strongly reflect the improvements in effluent quality; and this is also reflected in the concentrations observed downstream.…”

Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 99%

“…The highest (annual) ammonia load was reported in 2012 when nitrification of the effluent was minimal [36]. These chemicals are known to decrease with improved wastewater practices [42,43] and have been proposed as treatment indicators [44,45]. These upgrades resulted in a major effluent quality improvement, with ammonia being greatly reduced (nitrate increased) as a result of enhanced nitrification [36,37].…”

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

“…The treatment changes were also evident because the relative concentrations of the selected indicator pharmaceuticals, such as ibuprofen and naproxen, were greatly reduced in the final effluent. These chemicals are known to decrease with improved wastewater practices [42,43] and have been proposed as treatment indicators [44,45]. In contrast, it is well known that recalcitrant chemicals such as carbamazepine and venlafaxine are resistant to treatment [41,46], and their concentrations remained relatively consistent in the final effluent over the study period.…”

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

“…This does not necessarily imply that the decrease in concentration of selected pharmaceuticals was responsible for the decrease in the number of affected biological processes in rainbow darter, and further experiments are required to investigate this relationship. The 4 pharmaceuticals that were measured in the present study were assessed because they are relevant indicators for monitoring changes in wastewater effluent treatment [45]. For example, ibuprofen and naproxen are 2 pharmaceuticals that are typically removed when the plants include nitrifying steps in the treatment, which diminishes the amount of ammonia in the final effluent [45].…”

Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 99%

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Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Marjan

Martyniuk

Fuzzen

et al. 2017

Enviro Toxic and Chemistry

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The present study measured hepatic transcriptome responses in male rainbow darter (Etheostoma caeruleum) exposed to 2 municipal wastewater-treatment plants (MWWTPs; Kitchener and Waterloo) over 4 fall seasons (2011-2014) in the Grand River (Ontario, Canada). The overall goal was to determine if upgrades at the Kitchener MWWTP (in 2012) resulted in transcriptome responses indicative of improved effluent quality. The number of differentially expressed probes in fish downstream of the Kitchener outfall (904-1223) remained comparable to that downstream of Waterloo (767-3867). Noteworthy was that year and the interaction of year and site explained variability in more than twice the number of transcripts than site alone, suggesting that year and the interaction of year and site had a greater effect on the transcriptome than site alone. Gene set enrichment analysis revealed a gradual reduction in the number of gene ontologies over time at exposure sites, which corresponded with lower contaminant load. Subnetwork enrichment analysis revealed that there were noticeable shifts in the cell pathways differently expressed in the liver preupgrade and postupgrade. The dominant pathways altered preupgrade were related to genetic modifications and cell division, whereas postupgrade they were associated with the immune system, reproduction, and biochemical responses. Molecular pathways were dynamic over time, and following the upgrades, there was little evidence that gene expression profiles in fish collected from high-impact sites postupgrade were more similar to those in fish collected from reference site. Environ Toxicol Chem 2017;36:2108-2122. © 2017 SETAC.

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Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 89%

Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 99%

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

Section: Over-time Environmental Conditions At the Mwwtp-impacted Sitesmentioning

confidence: 99%

Section: Gene Set Enrichment Analysis and Mwwtp Upgradesmentioning

confidence: 99%

See 3 more Smart Citations

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Marjan

Martyniuk

Fuzzen

et al. 2017

Enviro Toxic and Chemistry

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Impacts of solids retention time and antibiotic loading in activated sludge systems on secondary effluent water quality and microbial community structure

Gerrity

Neyestani

2019

Water Environment Research

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Solids retention time (SRT) is one of the most important factors in designing and operating activated sludge systems for biological wastewater treatment. Longer SRTs have been shown to alter the structure and function of microbial communities, thereby leading to improved treatment efficacy with respect to bulk and trace organics, nutrient removal, and membrane fouling. Research has also shown that longer SRTs and/or higher influent antibiotic concentrations may lead to increased prevalence of antibiotic resistance. However, it is unclear whether elevated, yet subclinical, concentrations of antibiotics also impact the overall microbial community. The purpose of this study was to characterize changes in microbial community structure in a laboratory-scale activated sludge system as a function of SRT (2-20 days) and influent concentrations (1×-100× ambient) of ampicillin, sulfamethoxazole, tetracycline, trimethoprim, and vancomycin. Changes in microbial community structure were evaluated based on 16S rRNA gene sequencing, and microbial community function was evaluated based on changes in effluent water quality, including attenuation of bulk and trace organics. The results confirmed that longer SRTs-but not antibiotic loadings-had a significant impact on microbial community structure and effluent water quality. Therefore, moderate spikes in influent antibiotic concentrations are not expected to adversely impact biological wastewater treatment. • Practitioner points• Longer SRTs lead to changes in microbial community structure, including alpha and beta diversity and relative abundance of various taxa. • Enhanced TOrC attenuation at longer SRTs may be linked to biomass abundance rather than changes in microbial community structure. • Moderate spikes in influent antibiotic concentrations do not impact activated sludge performance or microbial community structure. • The phyla Proteobacteria and Bacteroidetes comprise a majority of the microbial community in primary effluent and mixed liquor.

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Investigation of biotransformation, sorption, and desorption of multiple chemical contaminants in pilot-scale drinking water biofilters

et al. 2018

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The evolving demands of drinking water treatment necessitate processes capable of removing a diverse suite of contaminants. Biofiltration can employ biotransformation and sorption to remove various classes of chemicals from water. Here, pilot-scale virgin anthracite-sand and previously used biological activated carbon (BAC)-sand dual media filters were operated for ∼250 days to assess removals of 0.4 mg/L ammonia as nitrogen, 50-140 μg/L manganese, and ∼100 ng/L each of trace organic compounds (TOrCs) spiked into pre-ozonated Colorado River water. Anthracite achieved complete nitrification within 200 days and started removing ibuprofen at 85 days. Limited manganese (10%) removal occurred. In contrast, BAC completely nitrified ammonia within 113 days, removed all manganese at 43 days, and exhibited steady state removal of most TOrCs by 140 days. However, during the first 140 days, removal of caffeine, DEET, gemfibrozil, naproxen, and trimethoprim decreased, suggesting a shift from sorption to biotransformation. Acetaminophen and sulfamethoxazole were removed at consistent levels, with complete removal of acetaminophen achieved throughout the study; ibuprofen removal increased with time. When subjected to elevated (1 μg/L) concentrations of TOrCs, BAC removed larger masses of chemicals; with a subsequent decrease and ultimate cease in the TOrCs spike, caffeine, DEET, gemfibrozil, and trimethoprim notably desorbed. By the end of operation, anthracite and BAC exhibited equivalent quantities of biomass measured as adenosine triphosphate, but BAC harbored greater microbial diversity (examined with 16S rRNA sequencing). Improved insight was gained regarding concurrent biotransformation, sorption, and desorption of multiple organic and inorganic contaminants in pilot-scale drinking water biofilters.

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Trace Organic Compound Indicator Removal During Conventional Wastewater Treatment

Cited by 5 publications

References 0 publications

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Returning to normal? Assessing transcriptome recovery over time in male rainbow darter (Etheostoma caeruleum) liver in response to wastewater‐treatment plant upgrades

Impacts of solids retention time and antibiotic loading in activated sludge systems on secondary effluent water quality and microbial community structure

Investigation of biotransformation, sorption, and desorption of multiple chemical contaminants in pilot-scale drinking water biofilters

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