Innovation provider

BioConstruct GmbH


BioConstruct GmbH
Office Lower Saxony
Wellingstr. 66
D-49328 Melle
Tel: +49 (0)5226 / 5932 - 0
Fax: +49 (0)5226 / 5932 – 11;


Wet fermentation processes are suitable for liquid manure and renewable raw material with a low lignin and wood fibre content. The predominant renewable raw material in Germany today is maize silage which is on discussion since it competes for acreage with food and animal feed production and, as a result, increases tenure prices. Significant consumption of maize silage as a co-substrate also enforces maize mono-cropping problems. It is therefore important for a sustainable development of biogas production to also use organic residues, biowaste or grass as a substrate. The latter gives biogas yields reduced by 15 % compared to maize silage fermentation which is compensated by lower prices for grass. In addition, squeezed fermentation residues constitute an optimal grassland fertilizer.


  • High biogas yields
  • Sustainable substrate (grass silage) usage
  • Fault monitoring system
  • Low maintenance costs

Innovative aspects (ecologic, social and economic)

Grass silage as a fermentation substrate requires a carefully adapted plant concept with smaller fermenters, large stirring devices as well as short connection and supply lines due to its tough-flowing and cohesive character.

Application examples

A plant engineered by BioConstruct near Westerstede, Lower Saxony, operates with grass silage (80% of total input) as a substrate since December 2005. It provides an electrical output of 537 kW.



Current stage of development

Already on the market

Intellectual Property Rights

Secret know-how

Country of origin


Country of application




National Contact Point

Daniel de Graaf
Wörlitzer Platz 1
06844 Dessau-Roßlau

Tel. +49 (0)340 21033407
Fax. +49 (0)340 21043407