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cdrApp
2019-03-20T17:49:52.294Z
Emily
Bailey
Author
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios.
The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest.
Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
Spring 2017
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons III.
Thesis advisor
text
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water
Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable
Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable
reuse scheme that involves the use of the combination of tertiary treated, dual
disinfected reclaimed water with currently used drinking water sources of surface water in
a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a
minimum of 5 days and treatment by conventional drinking water treatment processes.
However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for
potable reuse and designated as type 2 has not been evaluated for microbial quality or
examined in full-scale production scenarios. The goal of this research was to collect real
world data on type 2 reclaimed water by conducting field studies on the performance of
NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk
of exposure to this water in potable reuse scenarios by conducting microbiological water
quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples
of wastewater and water were collected over a one-year period from 4 NCT2RW producing
facilities, along with sewage impacted surface waters considered candidates for the 80/20
combination as sources for drinking water production. Water samples were examined for the
microbial indicators specified in the NC legislation and for representative pathogens of
public health interest. Based on microbial water quality analyses and QMRA analysis, there
is evidence that the risks associated with either consumption associated with potable
reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not
reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water.
Relatively high concentrations of human enteric viruses, especially culturable enteric
adenoviruses as well as microscopically detectable protozoan parasites were detectable in
samples of NCT2RW that met the water quality requirements for the regulated fecal
indicator microorganisms. These results have implications for the practical use of this
type of reclaimed water as a source of drinking water and produce irrigation in the
future, compared to its current use only for landscape irrigation.
Spring 2017
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed
Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting
institution
Environmental Sciences and
Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons III.
Thesis advisor
text
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
Spring 2017
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons III.
Thesis advisor
text
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017-05
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons III.
Thesis advisor
text
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons III.
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jacqueline
MacDonald Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jackie
MacDonald-Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology; Potable Reuse; Reclaimed Water
eng
Doctor of Philosophy
Dissertation
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jacqueline
MacDonald Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
University of North Carolina at Chapel Hill
Degree granting institution
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology, Potable Reuse, Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Environmental Sciences and Engineering
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jacqueline
MacDonald Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Emily
Bailey
Creator
Department of Environmental Sciences and Engineering
Gillings School of Global Public Health
Microbial Quality and Risk Assessment of Alternative Sources of Drinking Water Impacted by Waste Water: An Analysis of NC Type 2 Reclaimed Water for Potable Reuse
Recent North Carolina reclaimed water legislation has proposed a new potable reuse scheme that involves the use of the combination of tertiary treated, dual disinfected reclaimed water with currently used drinking water sources of surface water in a ratio of at least 80% surface water and up to 20% reclaimed, followed by storage for a minimum of 5 days and treatment by conventional drinking water treatment processes. However, the tertiary treated, dual disinfected reclaimed water proposed by NC, for potable reuse and designated as type 2 has not been evaluated for microbial quality or examined in full-scale production scenarios. The goal of this research was to collect real world data on type 2 reclaimed water by conducting field studies on the performance of NCT2 like reclaimed water producing treatment facilities, as well as to evaluate the risk of exposure to this water in potable reuse scenarios by conducting microbiological water quality analyses and then quantitative microbial risk assessments (QMRAs). Field samples of wastewater and water were collected over a one-year period from 4 NCT2RW producing facilities, along with sewage impacted surface waters considered candidates for the 80/20 combination as sources for drinking water production. Water samples were examined for the microbial indicators specified in the NC legislation and for representative pathogens of public health interest. Based on microbial water quality analyses and QMRA analysis, there is evidence that the risks associated with either consumption associated with potable reuse or agricultural risks associated with exposure to raw fruits and vegetables, are not reduced below the annual risk level of 1 x 10-4 set by US EPA for drinking water. Relatively high concentrations of human enteric viruses, especially culturable enteric adenoviruses as well as microscopically detectable protozoan parasites were detectable in samples of NCT2RW that met the water quality requirements for the regulated fecal indicator microorganisms. These results have implications for the practical use of this type of reclaimed water as a source of drinking water and produce irrigation in the future, compared to its current use only for landscape irrigation.
2017
Environmental health
Microbiology
Public health
Environmental Microbiology; Potable Reuse; Reclaimed Water
eng
Doctor of Philosophy
Dissertation
University of North Carolina at Chapel Hill Graduate School
Degree granting institution
Mark
Sobsey
Thesis advisor
Jill
Stewart
Thesis advisor
Detlef
Knappe
Thesis advisor
Jacqueline
MacDonald Gibson
Thesis advisor
Otto
Simmons
III
Thesis advisor
text
2017-05
Bailey_unc_0153D_16984.pdf
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2017-05-01T14:16:06Z
proquest
2019-07-06T00:00:00
application/pdf
2306872
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