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Biomass centre in Stausebach

Location: Kirchhain-Stausebach, Germany

Plant type: Hybrid system (combination of dry and wet fermentation), 4 MW (gas)

Feedstock: Bio waste and renewable raw materials

Biowaste: Heterogeneous and Seasonally Variable

The greatest challenge in the operation of a pure biowaste fermentation plant is the substrate: biowaste streams are not constant but variable, the composition can be very heterogeneous. In contrast to municipal biowaste, pure food waste has a lower dry matter content and is therefore less suitable for this fermentation method. In addition, the substrate availability of biowaste is often subject to seasonal variation.

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Flexible Use through Combined Technology

Without continuous utilisation it is relatively difficult to operate a waste facility economically. The project in Stausebach therefore faced the challenge of achieving constant gas output despite fluctuating substrate quantities and qualities.

To this end, Schmack Biogas has developed a plant system that combines different biogas technologies.The optimal use of feedstock is possible by integrating the dry and wet fermentation technology of Schmack Biogas.

Maximum Efficiency of Feedstock

By combining both fermenter types, the various input materials can be fed into the respectively most efficient fermentation type. Biogas is produced in two plants with different methods for organic waste, landscaping material and for renewable raw materials. There are thus two separate systems utilizing different feedstocks and processes. Points where the two systems intersect include gas collection, heating distribution and gas treatment. This leads to efficiency and synergy.

Around three million Nm³ biomethane are produced each year and subsequently fed into the natural gas grid of E.ON Mitte (public utility company). This corresponds to an energy content of approximately 30 million kWh and to the electricity consumption of approximately 8500 households.

 

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