Information on the use of cookies on this website

This website uses cookies, which are necessary to ensure certain functions of the website and help us to analyze how our website is used.

If you click "OK", you consent to the use of all cookies based on our privacy policy. You can revoke or adjust your choice at any time within our privacy policy.

If you click "Customize", you can make a selection.

Please make a choice regarding the use of cookies on this website.

Required cookies
These are cookies that are necessary to ensure the basic functionality of the website.

Required cookies
These are cookies that are necessary to ensure the basic functionality of the website.

Functional cookies
For the continuous improvement of our internet offer we use the service Google Analytics. Google Analytics uses cookies, which are small text files that are stored on your computer and that allow an analysis of the use of the website by you. More information can be found in our privacy policy, where you can change the use of these cookies at any time.


Sludge minimization

The missing link in total sludge minimisation could be realised by the application of PYREG® pyrolysis technology in which dewatered and (pre) dried sludges or screenings are pyrolysised and reduced to a valuable biosolid. At present this biosolid end product is used as an effective soil conditioner.

This innovative technology has been developed and produced by the company PYREG GmbH, who are providing this break-through technology for decentralised sludge processing. Medium sized WWTP and sludge processing plants (10.000 – 200.000 p.e.) are the optimum application. This thermal reduction of sludge and/or screenings generates significant economic benefits by reducing one of the largest cost activities of the entire sewage and sludge treatment utilities.

The technology

PYREG® provides pyrolysis of biomass. The fuel (biomass, sludge, screenings) is fed into a heating zone in which temperatures of max. 800°C. are reached. The biomass or sludge isn’t burned but pyrolysised. During the heating process, so called syngas is formed which is sequenced burned in a combustion chamber equipped with an efficient FLOX® burner (1250°C). The heat which is generated during the combustion of the gases is used to provide the necessary heat for the pyrolysis process.

PYREG® is characterised by significant low exhaust emission values. Furthermore, by using an exhaust gas heat exchange system more heat could be reclaimed from exhaust gases. This medium grade heat (up to 90°C) could be provided to facilitate the heat balance for a sludge drying process.

Applying PYREG® in a total sludge management concept with TPH, digestion, dewatering and sludge-drying and energy generation, is likely to significantly reduce sludge disposal costs and minimise total operational costs.