In the EEG 2012 a special remuneration class has been introduced for smaller plants up to 75kW with special requirements which have to be fulfilled, e.g. 80 mass percent of manure in the annual average. Therefore these plants receive a remuneration of 25 €-Cent per kW.
Bacterium which ferments organic material under the absence of aerial oxygen. This is mostly done at a temperature range between 30 to 38° C. Biogas is the product of this process.
Inflammable gas which is produced by fermentation of biomass of any kind.
Biochemical fermentation process; Different bacterium cultures ferment organic material in the starting material and produce biogas in the last step of fermentation (Hydrolyse, Acidogenese, Acetogenese, Methane formation).
Remuneration for the operator of a biogas plant, for the production of electricity. The amount is regulated by the EEG.
Law for renewable energies, regulates the preferred feed-in of electricity produced by renewable energies into the network and guarantees the producers fixed feed-in payments. Into effect sind April 2000.
Renewable raw materials (corn, whole plant silage, gras, …) are harvested off the field (mowing, chopping, …), carted away, backfilled and compressed (= rolled) at the intended area near the biogas plant. Afterwards one or more foils (clinging foil + main foil) is spreaded above and weighted with silo bags, silo belts or something like that. An additional net makes it more difficult for birds and rodents to harm the foil. There the substrate is stored until it is feeded into the fermenter. This technique is used because the plant’s own enzymes as well as aerobic and optional anaerobic microorganisms (bacteria, yeasts, mould) are suppressed. The lactic bacteria transform the glucose into acid (mostly lactic acid) and the pH typically falls to 4,0-4,5. As a result further bacteria which are harmful for the fermenting process are prevented in their growth: coli-aerogene-group, listerias, clostridias, Thereby the substrate is more durable and longer rich on energy.
Substrate (manure, gras, liquid manure, corn,…) which has gone through the biochemical degradation process in the primary or the secondary fermenter.
Fermenting container, gas proof and heated. This container is feeded with fresh “forage”= substrate (grass, GPS, manure, corn, …) on a daily basis, which starts fermenting and producing biogas under optimal conditions. Most used in plants with a storage flow principle with linear pit control. (1. pit = fermenter, 2. pit = secondary fermenter, 3. pit = final storage).
Container that is usually gas proof and is not heated. The fermented material is stored until it is distributed as fertilizer on agricultural areas.