EssDe® - Overview

EssDe® stands for the self-powered sewage treatment plant (Energy self sufficient by DEMON®).

The biggest cost factors and problems of sewage treatment are: • The oxidation of COD and nitrogen consumes a lot of oxygen / energy • The chemical energy of the COD is metabolized during oxidation • COD is needed for denitrification
In the EssDe® process, the majority of the carbon is fixed by adsorption in a first high-loaded step (A-step) and used for methanogenic digestion. In this way most of the COD can be converted directly into biogas and subsequently into electrical energy.
The concept is known for many years as the A/B-process and has often been implemented industrially. The major disadvantage of the system is, that in low-loaded B-stage there is not sufficient carbon for denitrification left. With the DEMON®® system, there is now a tool available, which removes nitrogen in a very efficient way.
The main points for the EssDe®-system are: • Maximum energy surplus, thanks to minimal oxygen consumption and maximized biogas production • Efficient nitrogen removal due to DEMON®® in the side and main stream • Less total surplus sludge • Significantly improved sludge dewatering
Pollutants in the wastewater will no longer be seen as a problem but as an energy source.

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