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Agitators for biogas technology


The agitator is the most important component in biogas technology. It is the “heart” of an anerobic digestion plant.

Whether it is for the digester, secondary digester or the end storage tank – the right mixing technology must be able to deal with an extensive range of feedstocks. It must be able to stir fibre rich feedstocks with a high DM content. It must also be able to cope with waste from agriculture, general refuse and



Whether you are constructing a new plant or repowering an existing one – Peters will plan the mixing system with you, so that it is perfectly suited to your needs and the demands of your feedstock.


The digester feed has a key role to play in biogas plant performance. Our „ECO-DOS R“ solids feeder is available in four modular versions.


Thanks to its corrosion and acid-resistant interior lining it is extremely durable. It can operate forwards and backwards and is suitable for side or rear loading.

Paddle mixer Excentro V

The defining characteristic of Paddle mixers is that they mix slowly and evenly.


This means that the bacteria in the mix is constantly fed, thus promoting the undisturbed anerobic breakdown of the biomass.

Paddle mixer Excentro S

Based on this sophisticated and highly reliable technology Peters have developed the EXCENTRO S paddle stirrer.


Just like its partner system, its special advantage is that all of the maintenance and replacement work on the EXCENTRO S can be carried out without emptying the digester.

Rod mixer Fermento

Our powerhouse the FERMENTO comes in six different performance classes from 7.5 kW to 22 kW.


It is installed into the side of the concrete lid, in a mounting frame which is embedded in the concrete. It can be easily de- and re-installed for maintenance work or retro-fitted into the digester. It is suitable for steel or concrete tanks.

Rod mixer Fermento XL

Based on our decades of experience in the manufacture of agitators for agriculture and biogas plants, we have developed our "Methabolix" power package.


It can be installed laterally into the concrete wall, from above through the concrete ceiling or over the roof frame "Methabox". The installation can also be carried out with the tank filled.


The Methabox® system is a built-in option for flexible gas storage, such as air-supported roofs and has been specially developed for flexible gas membranes.


Air-supported or foil roofs are often used as flexible biogas storage and gastight silo covers for biogas plants. These roofs are usually made of a PE film and an outer weather protection film made of PVC. The new Methabox system from Peters Mixer is easy to install into these air-supported roofs on biogas plants.