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Research experiences in direct potable water treatment using coagulation/ultrafiltration
A Lerch1, S Panglisch, R Gimbel
1University of Duisburg-Essen, Faculty of Engineering, Department of Mechanical Engineering Institute for Energy-and Environmental Engineering (EUT), Water Technology Group Bismarckstr. 90, BC 114, 47048 Duisburg, Germany. Lerch@uni-duisburg.de
Summary
New membrane technologies offer flexible and adaptable solutions for treating surface water to potable water. This study explores hybrid coagulation/membrane processes, focusing on factors influencing performance for efficient water purification.
Area of Science:
- Environmental Science
- Chemical Engineering
- Water Treatment Technology
Background:
- Growing interest in minimized pre-treatment processes for surface water to potable water conversion.
- Demand for flexible, adaptable, and expandable water treatment solutions.
- Membrane technology emerges as a key solution for these requirements.
Purpose of the Study:
- To present current research, piloting, and operational approaches for hybrid coagulation/membrane filtration processes.
- To investigate the performance of selective plants utilizing coagulation followed by ultrafiltration (UF) or microfiltration (MF).
- To analyze factors affecting membrane performance in hybrid systems.
Main Methods:
- Focus on the hybrid process of coagulation followed by membrane filtration (UF/MF).
- Investigation of capillary membranes in dead-end and IN/OUT operating modes.
- Analysis of mass freight, coagulation conditions, and temperature effects.
- Theoretical considerations on fouling layer development.
Main Results:
- Coagulation/UF and coagulation/MF represent a viable hybrid approach for water treatment.
- Key operational parameters like mass freight, coagulation conditions, and temperature significantly influence process efficiency.
- Understanding fouling layer build-up is crucial for optimizing membrane performance.
Conclusions:
- Hybrid coagulation/membrane processes are effective for producing potable water from surface water.
- Process optimization requires careful control of coagulation parameters and operating conditions.
- Further research into fouling mechanisms will enhance the design and operation of these systems.