Hiller Centrifuges for Environment & Wastewater


Environmental technology in the communal and industrial sectors

Environmental issues, such as sewage treatment, handling raw materials as well as the utilisation of renewable energy sources and the avoidance of harmful emissions, are becoming ever more pressing. Hiller has taken on this challenge and has been developing decanters for the environmental technology sector for over 50 years. These are used for many applications, including dewatering or thickening sludge, preparing drinking water and exploiting renewable energy sources.

Environmental protection & efficiency

As well as protecting the environment, Hiller technology makes a considerable contribution to the cost-effectiveness of the entire process thanks to the minimal use of polymers, the low energy and water consumption as well as the high proportion of solids in the discharged matter. Added to this, the long service life and low standstill times of Hiller decanters also ensure a high level of cost efficiency.

Benefits of the Hiller decanter technology:

  1. Maximum dry solids content discharged
  2. A wide range of wear protection technologies
  3. Simple, easy-to-service construction
  4. Low energy consumption
  5. Minimal disposal costs
  6. Minimal personnel needed

Process engineering features:

  1. Large diameter/length ratio of up to 1:4.2 and over
  2. Diameter-based acceleration values from 3000 - 5200 x 'g'
  3. Flow-optimised inlet and discharge zones
  4. Design modification for individual sludge requirements


Hiller decanter for sludge dewatering DecaPress


Sludge dewatering

With sludge dewatering, the HILLER DecaPress among the entire field of competition is characterised by being particularly easy to set up and runs very robustly and stably during everyday use. And all this with high throughput levels and considerably reduced consumption of power and flocculant. In the discharge, Hiller decanters achieve maximum dry solids content, which in turn result in reduced disposal costs. The development of the new DecaPress sees HILLER continuing down this path. In addition to countless improvements in detail, the new HILLER DecaPress features a revolutionary drive concept: the HILLER SEE Drive.


Sludge thickening

For sludge thickening, a decanter is used that has been designed specifically for this task. In most cases, this is carried out without flocculant and achieves maximum recovery figures. The excessive sludge is concentrated to a certain dry substance (ds) content, which was defined beforehand. This special Hiller decanter technique reduces the sludge volume by up to 90 percent.


Everything from one source – the complete Hiller concept

As well as manufacturing decanters, Hiller is available to customers for the design and selection of the optimal system components. Hiller gladly undertakes the planning and implementation of the entire system.

Contact us for sludge analyses made in our modern laboratory in Vilsbiburg



Schematic diagram with a HILLER DecaPress centrifuge for dewatering of sewage sludge





Grünstadt DP45n 1 HP Hiller DecaPress decanter at WWTP Grünstadt (Germany)