biogaspartner – a joint initiative.

Market.Development.in.Germany..
Maihingen
Country Germany
State Swabia
Location Maihingen
Start of Operation 2008
Biomethane Feed-in
Capacity
560 Nm 3 /h
Feed-in Capacity 50 million kWh p. a.
Upgrade Process Pressurised Water Scrubbing
Produced Gas Quality Natural Gas H
Pressure Level 10 bar
Raw Material Maize silage 25,000 t/a, clover-grass
7,000 t/a, grass 4,000 t/a, corn full
plant silage 7,000 t/a
The first development level of the biogas facility in Maihingen
was achieved in 1999. The performance of the facility is approx.
237 m3 /h. In 2004, the facility was expanded by another fermenter
with a performance of 375 m3 /h. The final expansion of
the biogas generation plant was in 2008 with a fermenter which
generates approx. 500 m3 /h of raw biogas. The biogas generation
facility is operated by local farmers.
Maihingen.processing.plant..
erdgas schwaben gmbh installed and operates the processing
and feeding plant. Water scrubbing was used for processing.
The natural biogas leaves the water scrubber at a pressure of
approx. 6 bar and a heating value of 10.7 kWh/m3 . The heating
value needs to be raised with liquefied gas. For feeding into the
natural gas grid, a 4 km gas pipeline had to be laid from the
processing plant to the feeding-in point. The natural biogas is
fed into a gas grid (DP 10). The operating pressure in the gas grid
is approx. 6 bar. no compressor is required at the location of the
processing plant; only in the summer months does part of the
natural biogas need to be fed into the upstream grid (DP 67.5)
via a compressor station.
The waste gas from the water scrubber contains remains of
methane and hydrogen sulphide. They are reprocessed with
thermal oxidation.
16 B I o G a s P a r T n E r – a j o I n T I n I T I a T I v E
Pliening
Country Germany
State Bavaria
Location Pliening
Start of Operation 2006
Biomethane Feed-in
Capacity
485 Nm 3 /h
Feed-in Capacity approx. 42 million kWh p. a.
Upgrade Process Pressure Swing Adsorption
Produced Gas Quality Natural Gas H
Pressure Level 17–40 bar
Raw Material approx. 40,000 t/a maize and fullplant
silage, catch crops
Investment approx. €10 million
The Pliening project won a special award at the “Biogas partnership
of 2008” awards for its pioneer work: It was the first
facility in Germany in December 2006 where the feeding-in of
bio methane in the natural gas grid was implemented.
only renewable raw materials from local farms are used
in Pliening. The energy plants are grown on agricultural areas
within a distance of approx. 10 km from the facility.The on-site
project partner of aufwind schmack is Maschinenring Ebersberg/
München ost e. v. which has designed a suitable harvest
and logistics concept. This partner is responsible for the organisation
of raw material procurement as well as conducting the
harvest and ferment residue removal.
The biogas technology is by the company schmack Biogas aG
with three main fermenters with a size of 1,000 m 3 and three
downstream fermenters of 2,700 m 3 each. The raw biogas
processing of the CarboTech company based on pressure swing
adsorption generates from 920 nm3 /h of raw biogas to 485
nm3 /h of biomethane with a methane content of more than
96 percent. The main part of the gas is fed into the natural gas
grid of sWM stadtwerke München.
The marketing of the biomethane gas is carried out via a trade
platform. Buyers and users of the biomethane are, amongst
others, combined heat and power plants of E.on Bayern Wärme
GmbH.