Biogas Vienna

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Pfaffenau waste incineration plant and Biogas Vienna

The biogas Vienna is Vienna's first plant for the recovery of non-compostable biogenic waste. It is part of the environmental center Simmering.

task

In the biogas plant, biogenic waste that is suitable for fermentation is converted into energy. 22,000 tons of biogenic waste are processed annually. This waste consists of: 10,000 tons of inner-city organic waste bin and 12,000 tons of leftover food from canteen kitchens and restaurants, market waste and stored food. The plant can be expanded to a capacity of 34,000 tons of input per year through a second expansion stage.

The waste is mechanically processed and then fermented in the fermentation reactor. The biogas produced during fermentation is used in the plant to generate district heating. The resulting digestate is composted.

technology

Both solid and liquid waste are treated in the facility.

The solid biogenic waste is placed in one of the two bunkers, which are equipped with a moving floor and transport the material to the first shredding stage. After the ferrous metals have been separated out, coarse contaminants (especially wood and plastics) are removed using a sieve. This is followed by the mashing of the waste in pulpers. The liquid waste is crushed using a separating mill, and contaminants are removed and mashed at the same time. The suspension obtained in this way is passed through a rake - sand trap combination in order to separate off further contaminants. The waste suspension is placed in an intermediate container. After the sanitation has taken place, the suspension enters the fermentation reactor, in which the residence time is 20 days. During this time, bacteria convert the organic components of the sanitized suspension into biogas. The gas produced is desulfurized and used in the hot water boiler for district heating production. The remaining digestate is dewatered and then composted.

Location

Biogas Wien is located in Vienna-Simmering in the immediate vicinity of the main sewage treatment plant Vienna , the Fernwärme Wien - Simmeringer Haide plant and the Pfaffenau waste incineration plant , with which it was built at the same time and is architecturally connected, between Johann-Petrak-Gasse and the Vienna Danube Canal .

building

At the beginning of 2003, the WKU - Wiener Kommunal Umweltprojektges.mbH announced an architecture competition in which 33 architecture firms across Europe took part. Architectural design proposals were asked for the external appearance of the waste incineration plant, the biogas plant and the ancillary buildings, taking into account the specified plant and process engineering requirements.

Out of eight shortlisted projects, that of Sne Veselinovic , Herbert Resetarits and Erwin Resetarits was unanimously chosen as the winner.

This was justified, among other things, with the visual link between the building mass and the surrounding landscape, despite the fact that the design exudes the representativeness desired by the client. Orange was chosen as the dominant exterior color, based on the vehicles and uniforms of the same color used by the Viennese garbage disposal.

On April 20, 2006, the foundation stone was laid for the building that is to house the two different systems. The Biogas Wien was completed in 2007 and the Pfaffenau waste incineration plant in autumn 2008.

politics

In January 1998 the Vienna City Hall Correspondence published the call of the Wiener Grünen for the construction of a biogas plant instead of a third waste incineration plant. A working group of the Eco-Social Forum Austria later dealt with the question of the feasibility of a biogas plant . The Federal Environment Agency was commissioned to draw up a study on the quantities of suitable biogenic waste that accumulates in Vienna. The result was around 28,000 tons per year.

The need to build such a facility was increased by a change in the law. Since November 1, 2006, feeding pigs with leftovers, the so-called "Sautrank", has been banned.

Footnotes

  1. ↑ http://www.wien.gv.at/vtx/vtx-rk-xlink?SEITE=%2F2003%2F0728%2F010.html
  2. ↑ http://wien.orf.at/stories/103748/
  3. ↑ http://www.wien.gv.at/vtx/vtx-rk-xlink?SEITE=%2F1998%2F0122%2F009.html
  4. ↑ http://www.wien.gv.at/vtx/vtx-rk-xlink?SEITE=%2F2000%2F0403%2F003.html
  5. ↑ http://www.wien.gv.at/vtx/vtx-rk-xlink?SEITE=%2F2004%2F1119%2F015.html

Web links

Coordinates: 48 ° 10 ′ 34.6 ″  N , 16 ° 27 ′ 40 ″  E