Donna Francy (Former Employee)
Science and Products
Microbial source tracking markers at three inland recreational lakes in Ohio, 2011
During the 2011 recreational season, samples were collected for E. coli and microbial source tracking (MST) marker concentrations to begin to understand potential sources of fecal contamination at three inland recreational lakes in Ohio - Buckeye, Atwood, and Tappan Lakes. The results from 32 regular samples, 4 field blanks, and 7 field replicates collected at 5 sites are presented in this report.
Comparative effectiveness of membrane bioreactors, conventional secondary treatment, and chlorine and UV disinfection to remove microorganisms from municipal wastewaters
Log removals of bacterial indicators, coliphage, and enteric viruses were studied in three membrane bioreactor (MBR) activated-sludge and two conventional secondary activated-sludge municipal wastewater treatment plants during three recreational seasons (May-Oct.) when disinfection of effluents is required. In total, 73 regular samples were collected from key locations throughout treatment process
Quantifying viruses and bacteria in wastewater—Results, interpretation methods, and quality control
Membrane bioreactors (MBR), used for wastewater treatment in Ohio and elsewhere in the United States, have pore sizes small enough to theoretically reduce concentrations of protozoa and bacteria, but not viruses. Sampling for viruses in wastewater is seldom done and not required. Instead, the bacterial indicators Escherichia coli (E. coli) and fecal coliforms are the required microbial measures of
Statistical assessment of DNA extraction reagent lot variability in real-time quantitative PCR
Performance of Traditional and Molecular Methods for Detecting Biological Agents in Drinking Water
Testing and refining the Ohio Nowcast at two Lake Erie beaches— 2008
Use of predictive models and rapid methods to nowcast bacteria levels at coastal beaches
Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration
Quality-Assurance Plan for Water-Quality Activities in the USGS Ohio Water Science Center
Nowcasting Beach Advisories at Ohio Lake Erie Beaches
Section 5. Procedures for Developing Models To Predict Exceedances of Recreational Water-Quality Standards at Coastal Beaches
Models for predicting recreational water quality at Lake Erie beaches
Science and Products
Microbial source tracking markers at three inland recreational lakes in Ohio, 2011
During the 2011 recreational season, samples were collected for E. coli and microbial source tracking (MST) marker concentrations to begin to understand potential sources of fecal contamination at three inland recreational lakes in Ohio - Buckeye, Atwood, and Tappan Lakes. The results from 32 regular samples, 4 field blanks, and 7 field replicates collected at 5 sites are presented in this report.
Comparative effectiveness of membrane bioreactors, conventional secondary treatment, and chlorine and UV disinfection to remove microorganisms from municipal wastewaters
Log removals of bacterial indicators, coliphage, and enteric viruses were studied in three membrane bioreactor (MBR) activated-sludge and two conventional secondary activated-sludge municipal wastewater treatment plants during three recreational seasons (May-Oct.) when disinfection of effluents is required. In total, 73 regular samples were collected from key locations throughout treatment process
Quantifying viruses and bacteria in wastewater—Results, interpretation methods, and quality control
Membrane bioreactors (MBR), used for wastewater treatment in Ohio and elsewhere in the United States, have pore sizes small enough to theoretically reduce concentrations of protozoa and bacteria, but not viruses. Sampling for viruses in wastewater is seldom done and not required. Instead, the bacterial indicators Escherichia coli (E. coli) and fecal coliforms are the required microbial measures of