Pilot-Biogas plant consisting of prefabricated units
As efforts in recent times show, the expansion task provided by the EU Renewable Energy Directive of raising the percentage of Renewables in our energy mix, is a hard achievable goal. Thus, the Kirchdorfer Industries Group decided to focus parts of their research on biogas tanks made of precast reinforced concrete elements to make a contribution to the mentioned issue.
The main advantages with that technology are:
- The developed system provides reduction of construction time down to one month for a tank regardless of which size
- A higher chemical and biological resistance of the concrete without any coating by using a special hydraulic binder named SLAGSTAR
- The preferred application of a central agitator because of a hard-top roof also made of precast reinforced concrete elements
- A high processing- and material quality ensured by the precast fabrication technology
- Reduced planning times with standard tanks from 2000 - 4000 m³ capacity
In cooperation with Biogas GmbH in Bruck an der Leitha, Wopfinger Baustoffindustrie and the Technical University of Vienna, a prototype with a volumetric capacity of 3000m³ was planned and erected. The patented technical design is leant on the tubbing technology, well known in tunnel construction. 22 side wall elements, each measured 11,6m in height, 2,7m in width, 18cm in thickness and 16t in weight, were assembled on a prepared foundation plate. The roof is built of 13 pre-stressed double T-beam disk carriers. Sealing systems with frames made of EPDM seal tapes (as used for tubbings), already clamped on the side wall elements in the factory, as well as subsequently applied sealing systems had been verified during the project. Ensuring stability according to statics, 27 external unbounded pre-stressing wires were applied with 80 tons of tension force each.
Providing that information, a lot of problems and perfidies had to be solved in advance. Especially the pre-stressing process in combination with the sealing system encountered unforeseeable issues, but eventually the claimed task of absolute water and gas tightness was fullfilled.
DI Alexander Barnas
MABA Fertigteilindustrie GmbH
Project or cooperation partner
- BM Ing. Eduard Leichtfried
BAUMIT Wopfinger Baustoffindustrie GmbH
- DI Gerhard Danzinger
BIOGAS GmbH Bruck an der Leitha
- Dipl.-Ing. Dr.techn. Sinan Korjenic, Dr. Friedrich Loibnegger, DI Harald König, DI Dr. Karl Deix
TECHNISCHE UNIVERSITÄT WIEN - Institut für Hochbau
- Dr. Franz Benjamin Schügerl
UNIVERSITÄT WIEN - Institut für Risikoforschung