Type of CHP system: Anaerobic digestion
The biogas plant in Wolpertshausen, www.novatechgmbh.com
Plant owner: The Gedea-Novatech Biogasanlagen GmbH & Co. KG is a limited liability company and an enterprice of the Novatech GmbH group.
Status of plant: Commercial
Biogas CHP unit: Schell
Digester, heat accumulator, hygenisation and biogas SO2 removal systen: Novatech (own production)
Power generation: Gas engine
Main fuel: Biogas
Nominal capacities & efficiencies:
Total thermal input, incl. fossil fuels: 1,108 MW
Gross electrical output: 0,25 MWe
Electrical efficiency, gross: 33 %
Gross-heat capacity by full load: < 28 MJ/s How is plant controlled: The biogas plant generates a maximum of electricity to feed into the public grid and is limited by the amount of arising biomass input material.
Heat backup: Liquid fuel CHP-unit (350 KW, Viessmann) and biogas burner (Elko-Klöckner) alternatively
Heat usage: Heating only
Energy usage: Process heat and heating of residential building (800 MWh/a), feeding in district heating system (1,5 km pipeline, 1200 MWh/a)
DH inlet temperature: 80 °C
DH return temperature: 60°C
Heat storage size: 20 m3
Fuel storage: 11 m³ oil tank
Plant description: The Gedea biogas plant in Wolpertshausen is a commercial unit and facilitates a residential area with heat. The operation of the plant saves the output of appr. 1800 t of CO2.
Fuel feeding system: Mechanical loading system
Digester capacity: 980 m³ (1 x steel grafting stream 120 m³, 2 x concrete digester a 430 m³)
Residence time: 70 days
Process temperature: mesophilic (44°C)
Annual gas production: 900000 Nm³
Specific gas yield: 180 m³ gas/ m³ feedstock
Gas quality: 55 % methane
Engine: pilot injection diesel engines
Flue gas cleaning:
Dust removal via fabric filter system
HCL reduction by flue gas scrubber
NOx-reduction via selective catalytic reduction (SCR)
SO2/SO3 reduction also by flue gas scrubber
one-level process; wet-fermentation (dry substrate content: 10 %)
The plant produces appr. 5000 t fertilizer per year, which is used in agriculture and forestry.
Staff: Appr. 3000 working hours per year
Electricity sale info: The German biomass-CHP plants, which feed the generated electricity into public grid, get a fixed amount of allowances per kWh (according capacity and year of commissioning) by legal restrictions – EEG -. This allowances decreases every year.
Data collected and quality assured by: Institute for Energy and Environment.
Contact person: Janet Witt