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Ask the Experts


YuJung Chang, PhD

YuJung Chang, PhD:

Dr. Chang is VP / National Director - Advanced Water Treatment at HDR, Inc.

Contact me: ychang@hdrinc.com


Antonia von Gottberg

Antonia von Gottberg:

Antonia von Gottberg is Director of Municipal Water Technology at Koch Membrane Systems. Antonia has a Master of Science in Chemical Engineering Practice from MIT, and a Master of Arts in Engineering Science from Cambridge University. Antonia has over 12 years experience in water treatment using a variety of membrane technologies. Antonia has worked on the application of membranes for filtration of surface water, desalination, wastewater treatment and water reuse. Prior to joining Koch Membrane Systems, Antonia was at Ionics.

Contact me: ajvongottberg@kochmembrane.com


Pierre Côté

Pierre Côté:

Pierre Côté is a Civil Engineer from Ecole Polytechnique Montréal (1978) with a Ph.D. from McMaster University, Hamilton (1986). He has 25 years of experience in municipal and industrial water and wastewater treatment. He is Chief Technology Officer with ZENON Environmental Inc. Dr Côté has authored 35 patents in the field of membrane technology. He is also the recipient of the 2000 Innovation Manning Principal Award in recognition of his invention of the ZeeWeed® filtration membrane. Since 2000, he is a member of the Canadian Academy of Engineering.

Contact me: pcote@zenon.com


Coley Ali

Coley Ali:

Coley Ali graduated in 1994 with a Bachelor’s of Science in Environmental Health from East Tennessee State University. His career in the Water Treatment field began in 1996 with Ecolochem, Inc as a Field Service Representative (FSR). In 2000, Coley accepted a position with HYDRANAUTICS as Applications/Technical Engineer. In 2003, Coley was promoted to Team Leader of HYDRANAUTICS U.S. Technical Support Group. He has a background of knowledge in media filtration, forced de-aeration (FDA), microfiltration, Electro-deionization (EDI), and Demineralization (DI). He now specializes in Reverse Osmosis (RO) and is also involved in ultrafiltration applications

Contact me: CAli@hydranautics.com


Mike Sadar

Mike Sadar:

Mike Sadar is a Research and Development Scientist for Hach Company whose focus is on detection of filtration failures associated with drinking water, wastewater, and environmental monitoring. Mr. Sadar’s expertise is in the monitoring of membrane systems using continuous monitoring methods, including sampling, interference reduction, and optimizing sensitivity and reliability. Mike has acquired several patents for the development of turbidity standards and in the methodology used to verify the performance of particle counters, and he has published many papers on the science of turbidity. He serves on the technical methods committees for ASTM and American Water Works Association.

Contact me: msader@hach.com


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