EDS Water Management Station Membranfiltration
For the finer things
Membrane filtration is highly topical in modern water treatment. Depending on the pore size, the principle is used in water treatment.
Another area of application is drinking water and wastewater treatment in the form of microfiltration and ultrafiltration. The aim of both methods is to retain pathogens, for example. The differences between the cross-flow and dead-end filtration operating modes are discussed.
The membrane filtration station illustrates both processes. In cross-flow operation, the trans-membrane pressure is set for optimum filter performance. The inflows and outflows to the membrane filter can be measured and thus the performance of the membrane is determined.
The backwashing process takes place automatically if the filter performance is insufficient. Backwashing is carried out with the previously produced filtrate from the system. The pressure retention test checks the functionality of the membrane.
Other typical applications are:
Reverse osmosis in seawater desalination
Process water treatment in the pharmaceutical industry
Steam generation in power plants
Details
Learning objectives
- Operating modes of membrane filtration such as filtration and backwashing
- Presentation of the basic theoretical principles of various membrane processes (micro-, ultra-, nanofiltration and reverse osmosis)
- Process engineering differences between cross-flow and dead-end filtration
- Automated integrity test for quality control of the membrane by pneumatic pressurization and monitoring
- Relationship between transmembrane pressure and filter performance
- Function of pneumatically driven fittings