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Using Ultrafiltration to Purify Drinking Water

Ultrafiltration is purely physical filtration with defined pores approximately 20 nanometers (nm) in size. They not only remove turbidity (the cloudiness you sometimes see in tap water) but also potential pathogens.

Surface influences on the treatment of drinking water

The various layers under the earth’s surface differ geologically. This means that in some regions heavy rains or heavy snow melt will pass too quickly from the surface into the groundwater. The natural filtration of the soil layers is often inadequate and fails to remove the pathogens, parasites, and bacteria picked up from the surface. These then find their way into our water treatment plants and possibly into our drinking water.

Parasites are not necessarily disabled by disinfection methods such as chlorination or UV irradiation. Temporary turbidity also allows other pathogens to pass through the disinfection systems intact. Parasites and pathogens can therefore contaminate public water supplies.

If this occurred, the cleaning and disinfection of the supply network is very complex and expensive. In both cases, the use of ultrafiltration is required. Ultrafiltration completely removes:

  • turbidity
  • rust stains
  • pathogens

and thus creates a safe supply of drinking water, even when conditions at the source vary. Ultrafiltration depends on using certified filtration technology.

Seccua ultrafiltration: the optimal treatment process

Optimized control technology

Seccua introduced its ultrafiltration systems and control systems (Seccua Control Pro) and related software in 2007 and has continually developed them ever since. Tried and tested Seccua Control Pro was especially designed for ultrafiltration processes and allows settings to be made on all of the major components to ensure an optimized purification process. The system also controls all of the sensors and actuators in a water treatment plant, thus making additional control equipment unnecessary. The Easy Connect Kit also allows systems operated in parallel to use the same peripheral devices. In addition, the system can also be integrated via the CAN bus into a master controller.

Integrated alarm system

An internal modem makes it possible to control and maintain the system remotely via the internet and take readings from the data logger to analyze and optimize operations. Alarm messages can be forwarded to up to 10 mobile numbers to ensure that downtimes are kept to an absolute minimum.

Seccua Phoenix systems are standardized with a modular design so that they can be introduced through any standard interface and extended at any time at low cost.

6 Advantages of Seccua ultrafiltration


Filtration is a purely physical process. We dispense entirely with the use of chemicals and irradiation and only use natural technology. This preserves the water’s natural balance and does not change it.

1. Little energy and water consumption

Seccua water filters consume little power. In addition, the flushing operation consumes only a minimal amount of water compared to conventional reverse osmosis technologies. Much of our equipment also flushes automatically and only when really necessary.

2. Low maintenance costs

No need to worry about remembering to flush Seccua filtration systems. The flushing usually takes place at night and automatically. An installer only needs to come out once a year to check up on your system.

3. Clean drinking water to every tap

Seccua water filter systems are installed directly at the transfer point from the public water lines into your home. They prevent millions of germs from ever penetrating your domestic pipelines and you get the best drinking water at every tap.

4. Patented nanotechnology

Seccua is a global innovation and technology leader in the field of drinking water in public buildings and private homes. The filtering processes have been subjected to extensive testing by the DVGW & the EPA!

5. Flexible, easy-to-use technology

The installation of Seccua water filter systems is simple and can usually be installed by your plumber. For larger systems, please contact our authorized service and installation partners.

6. Other advantages of Seccua ultrafiltration

Seccua integrity test (membrane test)

To make sure that all pathogens are removed, Seccua’s Virex and Phoenix systems have been subjected to patented, fully automated, high-resolution integrity tests according to the most stringent technical certification requirements of the US EPA. (The DVGW added parts of these requirements to its W213-5 regulations in 2013.) The membrane test can be performed automatically daily and will automatically detect defects of up to 1.6 μm, automatically calculate the actual pathogen collection rate (log stages), and store the results in the data logger. If there is a defect and the data shows a drop below the minimum collection rate, the system will automatically shut down and send out the corresponding alarm. Seccua Control Pro allows you to switch on a turbidity meter and conduct an instant integrity test if there is any turbidity in the filtrate, thus allowing continuous membrane monitoring.

Secure, sustainable, and cost-effective operation

The electricity required to run the ultrafiltration system is minimal (5 W during filtration; 35 W during flushing); the only other costs are maintenance and the electricity to run the feed pump. Seccua’s many years of experience designing ultrafiltration systems have resulted in a system with low operating costs. Flushing the system with just water and cleaning only when the build-up requires makes for a highly efficient system, even if the incoming water varies in quality. Only seldom do systems have to be equipped with automatic chemical cleaning. The chemical cleaning of the system is usually done only as part of the annual maintenance performed by our customer service team or one of our certified Seccua ASI partners. Seccua and its ASI partners also offer maintenance contracts that include monthly analyses and optimizations of operations as well as extended warranties on all components for the duration of the maintenance contract.

Detailed information about Seccua filtration?

We’re happy that you’re interested in our developed technology. If you have any questions, do not hesitate to call us.

Get in touch with us today: 1(503)766-5551

Detailed information


Seccua Ultrafiltration

Removal performance

Completely removes:

Viruses (MS2 Phage)
Bacteria (B. Subtilis, E-Coli)
Parasites (Crypto)

    Water consumption during flushing

    typically less than 1 gallon


    full-automatic, daily filter flushing
    tested by german DVGW and U.S. EPA
    optional: integrated membranetest
    optional: control- and alarmsystem