The concessions made by the new federal government on the subject of "plant splitting" (for biogas plants) make the existing large plants look much more optimistic about the future.
As soon as the coalition agreement was manifested in writing at the beginning of last week, the operators of the 2 largest biogas plants (currently worldwide) will have opened the champagne bottles. At least they would have every reason to do so, because now they are getting the higher one feed for their large-scale systems, which was not provided for in the previous interpretation of the system term. So far, the systems had economic problems because they were viewed as 1 large system with a correspondingly high output and thus received a lower subsidy per kWh. Newly built plants of this size are unlikely to benefit from this retrospective policy decision (based on Stock protection based) can benefit and the concept of the plant has been concretized over defined distances between individual fermentation modules.
Penkun biogas park:
- 78 million euros investment volume
- 15 hectares required
- 40 modules (fermenter) each 500 kW (= 20 MW)
- Electricity for 40.000 households
- estimated annual yield of the plant 25-30 million euros
Güstrow biogas park:
- 100 million euros investment volume
- Space requirement of 20 hectares with 20 fermenters
- Substrate made from maize, grain and cut grass
- 50 km catchment radius for the required renewable raw materials
- Production volume of 46 million m3 Bio natural gas per year
- Annual energy volume of 160 million kWh of electricity and 180 million kWh of heat
Photos of the large plants can be found in the Image archive of NAWARO AG.
The plant in Güstrow has the Pressurized water wash about a technology that can process biogas into natural gas. This makes it possible to use the existing infrastructure of the natural gas network and to better transport produced biogas. The advantage of electricity from biogas compared to other regenerative energies (photovoltaics, wind energy) is that it can be stored (!) Via the medium biogas and can therefore be used both for the basic load supply and for the peak load. So far, however, the biogas could not be transported and had to be converted into electricity directly on site. By Natural gas processing plants this problem is resolved.
A necessary for this Gas feed system was put into operation in Güstrow. NAWARO AG has another gas feed-in in Brandenburg planned. In cooperation with the proven partner EnviTec Biogas AG, this should go online next year.
Tomorrow I will write a further article on the topic of large plants in biogas production. This will be some explanations and my personal one Summary on the risks and opportunities of such large industrial projects.