Efficient production of biogas

As one key source of regenerative and dispatchable energy, biogas is a key enabler in the transition towards a sustainable energy system. This is also because biogas can be stored for a long period of time, which means it can be used to generate power according to demand.

Our method of high-load digestion for the efficient production of biogas from sewage sludge has already been implemented at a number of municipal wastewater treatment plants.

We also develop specific solutions for the conversion of biowaste to energy. These range from fermentation tests to the design of plants on a technical scale and the optimization of agricultural biogas plants in terms of productivity and efficiency.

High-load digestion for sludge management in wastewater treatment plants

We have already implemented the efficient production of biogas from sewage sludge using our high-load digestion process at various municipal sewage treatment plants. Through high-load digestion, the sewage sludge is stabilized with net energy gain, can be optimally dewatered and thermally disposed of at the lowest possible cost. The regenerative energy source biogas is produced as a product. With the biogas obtained, the energy requirement of the sewage plant can be covered and thus further costs can be saved. High load digestion is therefore also an intelligent alternative from an economic point of view and significantly improves the energy efficiency of municipal sewage treatment plants.

© Photo Verbandsgemeindewerke Edenkoben
The two-stage high-load anaerobic digestion system in Edenkoben allows the wastewater treatment plant to cope with a higher effluent load during the wine harvest

Optimization of agricultural biogas plants

Bioenergy is becoming increasingly important as a pillar of renewable energy production, because biogas can be stored for a certain period of time and electricity generation can be adapted to demand. On the other hand, the "cornification" of our farmland has come under criticism, as monocultures are detrimental to the diversity of the plant world and energy crops compete for arable land. This is reason enough to take a close look at the processes in agricultural biogas plants and to optimize their efficiency in terms of process engineering.

Biogas facility.
Biogas facility.

Energetic use of organic residual and waste materials

We also apply our know-how for the efficient fermentation of organic substances to the use of residual materials from the food industry and agriculture and develop specific solutions, from fermentation tests on a laboratory scale to the design of plants on a technical scale. In the course of the decentralization of the energy industry, low mass flows are becoming increasingly interesting.

© Fraunhofer IGB

Further information

Biogas from wastewater

We can also efficiently produce biogas as a high-quality energy source from wastewater with high organic load. These approaches are described in the water and wastewater technology section.