Sandra Dworatzek

Sandra Dworatzek

17 articles
Canada SIREM

Biography

Senior Principal scientist at SiREM, B.Sc. and M.Sc in Biology, University of Waterloo Ms. Dworatzek is an environmental microbiologist with advanced technical experience in laboratory treatability studies. Over the past 30 years she has conducted and overseen numerous bench-scale studies examining enhanced remediation of chlorinated solvents, petroleum hydrocarbons, emerging contaminants and other recalcitrant compounds. She has specific technical experience in the design of laboratory treatability studies, evaluating aerobic and anaerobic bioremediation, zero valent iron and chemical oxidation technologies in the laboratory, the scale up of growth of aerobic and anaerobic microbial cultures for bioaugmentation laboratory and field pilot tests. She currently provides senior technical oversight of laboratory treatability studies, and she manages the development and scale-up new bioaugmentation cultures. Ms. Dworatzek provides technical oversight for the development of new bioaugmentation cultures for a wide range of emerging contaminants including 1,2,3-trichlorpropane, perchlorate and sulfolane).This work includes developing novel cultures for BTEX compounds under anaerobic conditions and developing aerobic cultures to remediate 1,4-dioxane. Sandra is the industry lead for a project funded by Genome Canada that has successfully commercialized anaerobic BTX-degrading cultures.

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Showing 17 of 17
Successful Cleanup of Low-Level Chlorinated Propanes in Groundwater Using an In Situ Bioreactor
Srinivasa Varadhan Geosyntec Consultants International Inc.
Melissa Asher Geosyntec Consultants Inc.
Richard Hodges Geosyntec Consultants Inc.
Sandra Dworatzek SIREM
+1 more
Attachment
H1.: In Situ Technologies: Lessons Learned (Platform)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Breaking Benzene: Translating Decades of Anaerobic Bioremediation Research to Field Practice
Sandra Dworatzek SIREM
Jennifer Webb SiREM
Elizabeth Edwards University of Toronto
Courtney Toth University of Toronto
Attachment
D10.: In Situ Remediation of Petroleum Hydrocarbons (Platform)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Assessment of Metabolic and Cometabolic 1,4-Dioxane Biodegradation in Groundwater with Complex Hydrocarbon Contamination
Sandra Dworatzek SIREM
Jennifer Webb SiREM
Rachel Hallman SiREM
Alfredo Perez-de-Mora TAUW GmbH
+1 more
Attachment
B7.: 1,4-Dioxane Remediation Challenges (Platform)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 2, Poster Board #33) In Situ Bioremediation of 1,4-Dioxane in Mixed Contaminant Plume with Metabolic Bioaugmentation and Cometabolism
Fritz Krembs Trihydro Corporation
Mitch Olson Trihydro Corporation
Mark Settembrino Trihydro Corporation
Sandra Dworatzek SIREM
+1 more
B9. Advances in Biological Treatment of Mixed Contaminant Plumes (Poster) Poster
B9.: Advances in Biological Treatment of Mixed Contaminant Plumes (Poster)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 2, Poster Board #224) Unlocking the Power of Natural Attenuation: Insights from Laboratory Studies and Field Sampling Approaches
Michael Healey SiREM
Jeff Roberts SiREM
Sandra Dworatzek SIREM
Kela Ashworth SiREM
+3 more
H8. Monitored Natural Attenuation: Innovative Monitoring Approaches/Lines of Evidence and Lessons Learned (Poster) Poster
H8.: Monitored Natural Attenuation: Innovative Monitoring Approaches/Lines of Evidence and Lessons Learned (Poster)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #59) Evaluating the Biodegradation Potential of Diisopropyl Ether in Groundwater: Insights from Laboratory Microcosms
Sandra Dworatzek SIREM
Jennifer Webb SiREM
Trevor Carlson Geosyntec Consultants, Inc.
Lonnie Mercer Geosyntec Consultants Inc.
+4 more
C2. Combined Treatment of Emerging Contaminants with CVOCs (Posters) Poster
C2.: Combined Treatment of Emerging Contaminants with CVOCs (Posters)
2025 Bioremediation Symposium
Discovery, Characterization and In Situ Tracking of Novel Sulfolane-Degrading Microbes
Philip Dennis SiREM
Melody Vachon-Gregory SiREM
Kayla Finney SiREM
Jennifer Webb SiREM
+5 more
C3. Emerging Contaminants: Detection, Degradation, Fate and Transport (Platforms) Platform Attachment
C3.: Emerging Contaminants: Detection, Degradation, Fate and Transport (Platforms)
2025 Bioremediation Symposium
Application of Bioremediation Strategies at Complex Mixed Contaminant Sites
Corey Scales SiREM
Jeff Roberts SiREM
Philip Dennis SiREM
Sandra Dworatzek SIREM
D6. Impacts of Mixed Contaminants on Biodegradation (Platforms) Platform Attachment
D6.: Impacts of Mixed Contaminants on Biodegradation (Platforms)
2025 Bioremediation Symposium
In Situ Bioremediation of 1,4-Dioxane in Mixed Plume with Cycled Anaerobic and Aerobic Metabolic Bioaugmentation and Cometabolism
Fritz Krembs Trihydro Corporation
Kyle McDonald Trihydro Corporation
Mark Settembrino Trihydro Corporation
Ana Hopper Trihydro Corporation
+1 more
D6. Impacts of Mixed Contaminants on Biodegradation (Platforms) Platform Attachment
D6.: Impacts of Mixed Contaminants on Biodegradation (Platforms)
2025 Bioremediation Symposium
The Time Has Come: Case Studies of Petroleum Hydrocarbon Bioremediation Using Anaerobic Bioaugmentation Cultures
Jeff Roberts SiREM
Sandra Dworatzek SIREM
Corey Scales SiREM
Jennifer Webb SiREM
+2 more
D8. Bioremediation Case Studies (Platforms) Platform Attachment
D8.: Bioremediation Case Studies (Platforms)
2025 Bioremediation Symposium
(Group 2, Poster Board #74) Microbial Enhancement of Degradation of Benzene and Xylenes in LNAPL Under Methanogenic Conditions
Jorge Montoy Sovereign Consulting Inc.
Andrew Kirkman Remediation Management, bp
Sandra Dworatzek SIREM
Melody Vachon-Gregory SiREM
D8. Bioremediation Case Studies (Posters) Poster
D8.: Bioremediation Case Studies (Posters)
2025 Bioremediation Symposium
A Balanced Approach for Treating VOCs and 1,4-Dioxane by Integrating ISCO with Groundwater Recirculation at a Complex Industrial Landfill Site
Christopher Glidden Ramboll
Jasmine Mullins Ramboll
Nicole Robinson Ramboll
Brad Kubiak Ramboll
+3 more
D4. In Situ Chemical Oxidation: Optimized Design Approaches and Lessons Learned (Platforms) Platform Attachment
D4.: In Situ Chemical Oxidation: Optimized Design Approaches and Lessons Learned (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Long-Term Performance Assessment of Coupled Sulfidated Zero Valent Iron and Reductive Dechlorination for Residual Chlorinated Source Remediation
Dimin Fan Geosyntec Consultants
Anthony Danko NAVFAC EXWC
Heather Rectanus Geosyntec Consultants
Larissa Smith SiREM
+1 more
D8. Innovations in ZVI Amendment Formulations and Applications (Platforms) Platform Attachment
D8.: Innovations in ZVI Amendment Formulations and Applications (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Modeling Laboratory Experimental Data: The Effects of Colloidal Activated Carbon on Biological Dechlorination
Larissa Smith SiREM
Sandra Dworatzek SIREM
Dimin Fan Geosyntec Consultants
James Wang Geosyntec Consultants
+2 more
G8. In Situ Activated Carbon-Based Amendments: Assessing Effectiveness and Performance (Platforms) Platform Attachment
G8.: In Situ Activated Carbon-Based Amendments: Assessing Effectiveness and Performance (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Anaerobic Benzene Biodegradation Kinetics under Competitive Inhibition: Implications for Remediation in Mixed Contaminant Plumes
Courtney Toth University of Toronto
Connie Zeng University of Toronto
Rishika Puri University of Toronto
Shen Guo University of Toronto
+4 more
H1. Advances in Biological Treatment of Mixed Contaminant Plumes (Platforms) Platform Attachment
H1.: Advances in Biological Treatment of Mixed Contaminant Plumes (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
In Situ Metabolic Bioremediation of 1,4-Dioxane with Mixed Culture on Commercially Available Particle Media at Environmentally Relevant Concentrations
Chao Zhou Geosyntec Consultants, Inc.
Jiaming Shi Geosyntec Consultant
Kela Ashworth SiREM
Sandra Dworatzek SIREM
+2 more
H3. 1,4-Dioxane Remediation Technologies and Challenges (Platforms) Platform Attachment
H3.: 1,4-Dioxane Remediation Technologies and Challenges (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 2, Poster Board #191) Assessing Remedy Effectiveness: Anaerobic Biobarrier Performance and Amendment Strategies
Manasa Sadhasivan Geosyntec Consultants
Courtney Collins Geosyntec Consultants
Sandra Dworatzek SIREM
Corey Scales SiREM
G5. Remedial Design/Optimization: Applications of Mass Flux and Mass Discharge (Posters) Poster Poster
G5.: Remedial Design/Optimization: Applications of Mass Flux and Mass Discharge (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds