biogaspartner – a joint initiative.
biogaspartner – a joint initiative.
biogaspartner – a joint initiative.
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Market.Development.in.Germany..<br />
Altenstadt/Schongau<br />
Country Germany<br />
State Bavaria<br />
Location Altenstadt/Schongau<br />
Start of Operation 2009<br />
Biomethane Feed-in<br />
Capacity<br />
690 Nm 3 /h<br />
Feed-in Capacity 66 million kWh p. a.<br />
Upgrade Process Pressurised Water Scrubbing<br />
Produced Gas Quality Natural Gas H<br />
Pressure Level 4 bar<br />
Raw Material 33.000 t/a organic waste<br />
The altenstadt / schongau project won the „Biogas partnership<br />
of the Year“ award presented by the German Energy agency in<br />
2009.<br />
Raw.material.production.and.logistics..<br />
The altenstadt biogas plant started operation in 2001. In the<br />
beginning, the plant produced 700 m3 /h raw biogas, which was<br />
used on site to cogenerate heat and power. In 2009, biogas production<br />
was expanded to about 1,100 m3 /h. The CHP plant on site<br />
was put out of service, the biogas was upgraded to natural gas<br />
quality and fed into the gas grid. 33,000 t of organic waste are<br />
turned into biogas in the plant each year, such as expired food,<br />
cheese and dairy residues, slaughterhouse and organic waste.<br />
Waste is provided by a local company as well as by trucks owned<br />
by biogas producer Öko-Power GmbH & Co. Biogas KG, which<br />
are used to transport the raw material to the plant.<br />
Facility.and.technical.data...<br />
The biogas plant is supplied with the raw material via a feed<br />
hopper. Before being fed into the fermenter, they go through a<br />
water desinfection process, in which process-harmful bacteria<br />
are killed. The raw material is processed in 8 fermenters wth an<br />
overall capacity of 7,700 m3 biogas. Wet fermentation is applied<br />
to produce biogas. The raw material remains in the fermenters<br />
for ca. 50 days. Before being forwarded into the upgrade<br />
plant, the nH -concentration is reduced using a scrubber. The<br />
3<br />
upgrading process is based on pressurised water scrubbing.<br />
The Co -separation results in 690 m 2 3 /h biomethane with a CH - 4<br />
concentration of 98 percent and a calorific value of about 10,8<br />
kWh/m3 . Before being fed into the gas grid, the calorific value is<br />
raised to 11,1 kWh/m3 .<br />
18 B I o G a s P a r T n E r <strong>–</strong> a j o I n T I n I T I a T I v E<br />
Biomethane.use.and.marketing.<br />
all of the biogas produced is fed into the distribution grid of<br />
schwaben netz gmbh. a calorific value boiler operated with<br />
biomethane generates heat necessary for the fermenter heating.<br />
a natural gas station was erected on the biogas plant site to<br />
supply company vehicles with biomethane. since biogas based<br />
on organic waste can be offered at comparatively low prices,<br />
it is applicable not only for cogeneration of heat and power<br />
utilisation, but also for heating purposes. erdgas schwaben<br />
offers two products: Bio 100 and Bio 20. Heat customers thus<br />
can be provided with 100 percent or 20 percent climate-friendly<br />
biomethane. erdgas schwaben uses biomethane for her own<br />
heat demand coverage. all CHP plants run by erdgas schwaben<br />
are also supplied with biomethane.<br />
The.cooperation.model.of.the.project.partners.<br />
The biogas plant was erected and is operated by ÖkoPower<br />
GmbH. raw material supply is ensured on a contractory basis.<br />
a biogas supply contract between ÖkoPower GmbH and erdgas<br />
schwaben was set up for 12 years. erdgas schwaben’s rofessional<br />
service staff is responsible for the operation of the upgrade<br />
plant. The marketing branch of erdgas schwaben is in charge of<br />
the biomethane marketing.<br />
Involvement.of.external.stakeholders..<br />
since 2001, ÖkoPowerGmbH operated the altenstadt biogas<br />
plant with an on-site gas utilisation in a CHP plant. The generated<br />
heat was mostly dissipated via a cooler and was thus not<br />
used. During the planning phase for the biogas production expansion,<br />
this was also one aspect of great consideration. since<br />
there was no potential local heat customer available, the upgrade<br />
and feed-in of the biomethane quickly presented itself as<br />
the most attractive and sensible solution. It was easy to establish<br />
contact between ÖkoPower GmbH and erdgas schwaben, since<br />
the latter is already operating two other biomethane projects<br />
with considerable media coverage. Together, the partners presented<br />
their concept to the mayor and the district administrator.<br />
The plan was received well by the community and met with<br />
great support and approval.
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