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Agitators for the biogas industry

Maximum operational reliability right from the start

Agitator technology for biogas plants

With over 750 central agitators installed in biogas plants since 2005 and more than 20 years of experience in the biogas sector, PRG offers a wide range of highly developed agitators. Our biogas agitators are specially designed to meet the requirements and sizes of the respective plants, ensuring maximum efficiency and operational reliability right from the start.

 

All of our agitators for biogas plants are freely configurable, so that they can be seamlessly integrated into your processes. Our internal development department can also develop customised special designs for you. All biogas agitator types are characterised by excellent material and manufacturing quality as well as maximum cost-effectiveness and reliability. This is because we only use the highest quality materials and selected components from well-known manufacturers for our biogas agitators.

 

We manufacture our agitators for the biogas industry either from carbon steel, carbon steel/stainless steel or completely from stainless steel. Shaft lengths of up to 24,000 mm (free-floating) and shaft diameters of up to 240 mm can be realised. An exceptionally high level of vertical integration also allows us to independently manufacture or process a large proportion of the required agitator components. This means we can fulfil your requirements with the greatest possible flexibility while also guaranteeing precision, quality and ease of maintenance.

 

Our SCC-certified technicians and supervisors ensure that you receive first-class service for your PRG agitator technology – which can also be part of a customised maintenance contract if requested. It is a matter of course for us that, when manufacturing our products, we always comply with the applicable legal requirements and your in-house factory standards.

So whatever you have in mind: 
we will build the right agitator for you!

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For us, it's all about

biogas production

In cooperation with Getriebebau NORD GmbH & Co. KG, we have equipped one of the largest biogas plants in Europe with central agitators.


This video provides an insight into this exciting project:

Uniform mixing and maximum gas yield

Powerful central agitators for biogas plants

Efficient agitator technology is indispensable for successful biogas production. PRG offers you technically sophisticated central agitators for a wide range of applications – whether on a laboratory scale or for industrial production in large tanks with volumes of up to 10,000 m³.
 

Our central agitators perform the tasks involved in biogas production precisely and reliably. The top priority is the homogeneous distribution of the product components to enable optimal material and heat transport – the basic requirement for maximum gas yield. At the same time, our central agitators effectively prevent the formation of a floating layer and sedimentation at the bottom of the container.

 

Whether it’s a hydrolysis tank, sanitisation tank, fermenter or secondary fermenter: our central agitators can be installed in all common container types, whether they are concrete tanks, bolted and coated steel containers or enamelled containers. We also offer you the greatest possible flexibility in terms of the media to be processed: the spectrum ranges from renewable raw materials to silage and slurry, as well as animal and kitchen waste. A dry matter content of up to 16% is standard for our agitators.


As drive units, we use robust and durable gear motors from renowned German manufacturers.

 

We work closely with our customers to design our biogas agitators, developing customised solutions at the highest technical level based on the specified parameters. For example, our central agitators for biogas plants do not require baffles or shaft bearings. Instead, a low-maintenance surge tank with integrated level monitoring is used to seal the agitator off from the atmosphere. Furthermore, we ensure the high quality of our central agitators by subjecting the weld seams to various inspection procedures (visual, dye penetrant, ultrasonic testing, etc.).


All these factors have made PRG's agitator technology the first choice of well-known customers all over the world.

Through the wall

Agitators for side installation

For use in secondary fermenters with gas storage, agitator technology usually needs to be installed laterally. PRG can also provide you with customised solutions of the highest quality for this, for use in areas of up to 7,000 m³.

 

The installation position and the number of belt-driven agitators required are determined by the respective useful volume. This ensures that the contents of the tank are mixed optimally. In the case of bolted tanks, the agitator is mounted on a column so that no forces are introduced into the tank wall. Our agitators can also be easily mounted on concrete tanks, so that there are virtually no limits to their possible uses.

 

Furthermore, we contribute to making our customers' production processes even more efficient and economical through innovative ideas and the continuous further development of our products. For example, together with one of our suppliers, we have developed a mechanical seal with a shutdown device specially designed for use in the biogas industry. It enables the maintenance and replacement of the seal from the outside when the tank is completely full – a particularly maintenance-friendly and cost-saving solution, as it minimises downtime.

 

Benefit from the many advantages that custom-made agitators from PRG offer you as a biogas producer – we would be happy to advise you in detail in a personal meeting!

biogas industry

agitators and agitation plants

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Rainer Isermann

Sales Engineer

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