Rückert NatUrgas GmbH

The foundation was laid in 1993. Claus Rückert opened his engineering office.
The Rückert NatUrgas GmbH developed from this office and today it is a professional consultant and practice oriented partner for planning and constructing biogas plants.

In the beginning, the focus of our planning activities was on co-fermentation plants for agriculture. They were conceived as round tank plants with submersible agitators.

In 1995, the biogas plant Schilmeier in Fürth/Bavaria was the first one to be completely planned by us. This plant was awarded the environmental prize of the city of Fürth in 1998. Due to this big success, the biogas plant has continuously been expanded and today is operated at a performance of 330 kW. 

The biogas plant Rück, Merkendorf, that was fed into the public electricity grid in 1995 also was awarded a prize. It won the State Promotion Prize for Renewable Energy Sources (German: Staatspreis – Förderpreis für nachwachsende Rohstoffe) of the Bavarian State Ministery for Nutrition, Agriculture and Forestry (German: Bayrisches Staatsministeriums für Ernährung, Landwirtschaft und Forsten) in 1998. The plant was giving permission for fermenting bio waste and food leftovers. In order to fully make use of existing synergy effects, the Wertstoffbörse Rückert was founded that procures organic, rich in energy waste.

Growing interest in fermenting solid matters in agriculture led to the development of the range of horizontal fermenters U³ in 1998. Its advantages with regard to agitating effects, own power consumption and decomposition performance when fermenting high contents of solid matters convinced everybody.

Based on the ground-breaking and successful U³-range, the NatUrgas® procedure, an optimized compact biogas plant, was conceived and realized in 2000.

Via an awarding procedure of the Chamber of Agriculture Upper Austria in 2004, Rückert NatUrgas was given the order to plan ten biogas plants in the performance ranges of 100 to 500 kW.

Due to the modifications to the Renewable Energy Sources Act (German: Energie-Einspeise-Gesetz - EEG) made in August 2004, the demand for renewable energy source plants increased dramatically. Using the NatUrgas® procedure raw material can be fermented without inputting any liquids. This guarantees additional income from the CHP and innovation bonus.

Nowadays, biogas plants in the ranges of 300 kW up to 3 MW are planned and realized using the NatUrgas® procedure throughout Europe. The NatUrgas® procedure especially convinces by intelligent concepts and efficiency, industrial construction methodologies, high-quality components and the shortest possible ways.

The performance spectrum of Rückert NatUrgas GmbH comprises the complete conception and planning from the first idea via the commissioning of the biogas plant up to after-sales service. Due to its expertise and experience, the Rückert team of engineers and natural scientists is also a valued partner in the field of consulting.


The Rückert NatUrgas GmbH is consultants and planners of compact, efficient and economical farm-scale and industrial biogas plants, who accompany you as specialists on your way of the individual planning, commissioning, repowering and the plant operation in a way that is conformous to the building permission.

biogas - Naturgas procedure - modular construction in a building - biological waste utilization - high-performance agitator - low energy consumption - wide variety of input substrates - renewable primary energy sources - NaWaRos - chicken dung digestion - bio-waste digestion - chicken dung - efficiency - viability - BImSchG - manure digestion - food leftovers - bio-methane - fertilisation substrate - conditioning of fermentation residues - conditioning of biogas - heat utilization - bio-waste - repowering - loss of remuneration - control - illegal plant operation - inspection - plant operation conformous to the building permission

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