Browsing Science (Faculty of) by Subject "wastewater"
Now showing items 1-18 of 18
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Ammonia-oxidizing archaea and complete ammonia-oxidizing bacteria in a municipal wastewater treatment plant
(University of Waterloo, 2018-09-25)High levels of ammonia in aquatic environments can lead to eutrophication, oxygen depletion, and toxicity to aquatic animals. An important goal of municipal wastewater treatment plants (WWTPs) is to remove ammonia from ... -
Analysis of Temporal Changes in Estrogenic Compounds Released from Municipal Wastewater Treatment Plants
(University of Waterloo, 2019-09-26)Wastewater treatment plants (WWTPs) are traditionally designed to target the removal of contaminants such as total suspended solids, phosphorous, biological oxygen demand, and ammonia. Recent changes to the Federal ... -
Biological responses in fish exposed to municipal wastewater treatment plant effluent in situ
(IWA Publishing, 2021-04-16)Effluents from municipal wastewater treatment plants (MWTPs) are complex mixtures of chemicals including endocrine-disrupting compounds (EDCs) and 17α-ethynylestradiol (EE2). The objective of this study was to evaluate ... -
Colloid transport through basic oxygen furnace slag as permeable treatment media for pathogen removal
(University of Waterloo, 2008-09-26)Basic oxygen furnace (BOF) slag media were studied through a series of laboratory, modeling and field studies as a potential treatment material for use in on site wastewater disposal systems. Microsphere enumeration ... -
Community Surveillance of Omicron in Ontario: Wastewater-based Epidemiology Comes of Age
(Research Square, 2022-03-15)Wastewater-based surveillance of SARS-CoV-2 RNA has been implemented at building, neighbourhood, and city levels throughout the world. Implementation strategies and analysis methods differ, but they all aim to provide rapid ... -
Discovering new viral lineages and estimating their abundance in wastewater
(University of Waterloo, 2022-09-27)Wastewater surveillance of SARS-CoV-2 has emerged as a critical tool for tracking the spread of COVID-19. In addition to estimating the relative case numbers using qPCR, SARS-CoV-2 genomic RNA can be extracted from wastewater ... -
Dissolved inorganic nitrogen cycling in a river receiving wastewater: the response to changes in wastewater treatment effluent
(University of Waterloo, 2016-01-27)Nitrogen is an essential element for all life forms, but when in excess in an aquatic ecosystem, it can cause an imbalance in the trophic status. A significant amount of nitrogen is released into the environment by wastewater ... -
Does intersex matter? A case study of rainbow darter in the Grand River
(University of Waterloo, 2016-12-21)Endocrine disrupting compounds (EDCs) are present in the environment and can have negative effects on the health of wildlife. Aquatic organisms residing near the outfalls of municipal wastewater effluent (MWWE) are chronically ... -
Enrichment and activity of comammox Nitrospira from the rotating biological contactors of a municipal wastewater treatment system
(University of Waterloo, 2021-02-05)Nitrification, the biological conversion of ammonia to nitrate, via nitrite, is an important process in both natural and engineered systems. Nitrification within wastewater treatment plants (WWTPs) is necessary because ... -
Microbial communities of wastewater in the Canadian Arctic
(University of Waterloo, 2020-01-20)Wastewater management in the Canadian Arctic is challenging due to the extreme climate and lack of conventional treatment system infrastructure. To resolve these issues, most Northern communities use waste stabilization ... -
Modeling the emission, transport, and fate of key micropollutants and their treatment using novel titanium dioxide nanomaterials
(University of Waterloo, 2018-01-31)Endocrine disruptive effects in fish have been observed in many watersheds worldwide. The presence of intersex (ova-testes) in particular is well-documented in the Grand River watershed in southern Ontario, and is associated ... -
Multi-stressor impacts on fish energetics and stress response: a comparison between lab and field studies
(University of Waterloo, 2017-08-24)Aquatic organisms are continuously exposed to multiple environmental stressors that work cumulatively and synergistically to alter ecosystems. The objective of this study was to investigate the impacts of multiple stressors ... -
Multiple Stressors in the Environment: The Effects of Exposure to an Antidepressant (Venlafaxine) and Increased Temperature on Zebrafish Metabolism
(Multidisciplinary Digital Publishing Institute, 2019-11-19)Aquatic organisms are continuously exposed to multiple environmental stressors working cumulatively to alter ecosystems. Wastewater-dominated environments are often riddled by a myriad of stressors, such as chemical and ... -
Passive sampling to understand and predict sources of wastewater and agricultural contamination in rural watersheds
(University of Waterloo, 2023-07-12)Passive sampling techniques have emerged as valuable tools in environmental monitoring, offering distinct advantages over traditional discrete sampling methods. Discrete sampling techniques are only representative of the ... -
The Reproductive Effects of Municipal Wastewater Effluents
(University of Guelph, 2017-03-01)There is a growing concern that pharmaceuticals and other chemicals present in the effluents (sewage discharged into a river) from municipal wastewater treatment plants enter the aquatic environment, where they may affect ... -
Solid phase microextraction for in vivo determination of pharmaceuticals in fish and wastewater
(University of Waterloo, 2012-10-26)This thesis describes the development and application of solid phase microextraction (SPME) as a sample preparation technique for in vivo determination of pharmaceutical residues in fish tissue and wastewater. The occurrence, ... -
Wastewater to clinical case (WC) ratio of COVID-19 identifies insufficient clinical testing, onset of new variants of concern and population immunity in urban communities
(medRxiv, 2022-04-20)Clinical testing has been the cornerstone of public health monitoring and infection control efforts in communities throughout the COVID-19 pandemic. With the extant and anticipated reduction of clinical testing as the ... -
Wild fish responses to wastewater treatment plant upgrades in the Grand River, Ontario
(University of Waterloo, 2020-09-24)Municipal wastewater treatment plant (WWTP) effluent is a major point source of contaminants (nutrients, pharmaceuticals, estrogens, etc.) which can harm aquatic life. Many studies have investigated the effects of WWTP ...