Reduced costs thanks to improved sewage sludge treatment and a stable digestion process.

VTA GSD - Gegenstrom Desintegrations- Anlagen mittels Ultraschall

The original. With ultrasound

Optimum sewage sludge treatment, stable digestion operation and reduction of costs – this is what reverse flow disintegration (GSD) with ultrasound, a patented process from VTA Technologie GmbH, has to offer.

Making organic substances bound in the sewage sludge available for further biological degradation (anaerobic or aerobic).

Optimised sewage sludge treatment, stable digestion process and cost reduction.

Unpressurised, fully automatic operation

No foaming in the digestion tower and up to 30 % more biogas

Rapid amortisation

Up to 20 % less sludge

Up to 20 % less polymer

Digester gas extraction


Optimum sewage sludge treatment, stable digestion operation and reduction of costs: this is what reverse flow disintegration has to offer.


UP TO 30% MORE BIOGAS Use energy contained in the sewage sludge: thanks to GSD, considerably more biogas is produced which can be converted into electricity and heat.
UP TO 20% LESS POLYMER Dewater sludge economically: thanks to GSD, the need for flocculation agents (polymers) is reduced significantly.
UP TO 20% LESS SLUDGE Save on disposal costs: the effective decomposition of organic matter and improved dewatering behaviour reduces the volume of sludge.
NO FOAMING IN THE DIGESTER For stable operation: filamentous bacteria are destroyed thus preventing or reducing foaming in the digester.
UP TO 15% MORE CAPACITY Increase in dewatering capacity of the existing system by up to 15%.
SHORT PAYBACK PERIOD Under favourable conditions, a GSD system pays for itself after just 3 years.


Effect of ultrasound on microorganisms

The cell walls of the microorganisms are stable, but the ultrasound brings a lot of energy to the cell wall. The cells are broken down by ultrasound. Cells now consist of aqueous solutions on the inside. The usable proportion of nutrients in the sludge increases due to their digestion (e.g. salts, carbohydrates, proteins, etc.).

In addition, the cell walls are accessible from both sides, so that the buffering effect of the cell content does not come into play. For this reason, the cell wall can be broken down more quickly and serves as a food source for the bacteria. An increased food base leads to an increased population and greater activity. The metabolism increases. This enables a larger amount of organic material to be converted into digester gas.

VTA Ultrasonic disintegration

Mode of action of countercurrent disintegration in two steps. Homogenisation and cell disintegration.

VTA Ultraschall  Desintegration
Counterflow disintegration works in two steps.  Homogenisation and cell disruption.



The challenge

Inefficient digestion: 

International studies show that 50% of all digestion plants work unsatisfactorily.

Our solution

VTA Ultrasound reverse flow disintegration:

Cells are broken down. This enables an increase in the amount of digester gas and the production of electrical energy by up to 30%.

The result

Cost savings by increasing gas and energy production

• stabilisation and optimisation of the digestion process

• reduction of sewage sludge and polymer consumption

VTA GSD in practice


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