Due to the defibration and the increased surface area, bacteria can decompose the biomass better and faster, which reduces the residual gas potential and makes the best possible use of the source material. At the same time, the energy required for digestion (extrusion) is only around 10 % of the additional yield from the process. This results in a significantly higher gas yield. The efficiency increases and so do your profits.

The bioextrusion process enables the profitable use of, in particular, straw and agricultural residues and waste products in your biogas plant. You are therefore able to use source materials in the biogas plant that were previously considered unusable. The Lehmann-UMT bioextruder enables the rapid decomposition of straw, miscanthus and much more and ensures increased biogas productivity. You contribute to environmental protection and resource conservation and invest in a sustainable system.

Fiberized substances are incorporated into the total volume of the fermenter and do not form floating layers. This means that significantly less stirring energy is required, your costs are reduced and the risk of detonation due to bubbles forming in the absence of air is minimized. The plants are planned and built smaller, as they benefit from space savings thanks to the extruder.

The extruder ensures optimum mixing and blending of the biomass thanks to the counter-rotating screws. This results in a homogeneous end product that ensures optimum further processing. At the same time, the extruder enables a low-risk and uncomplicated changeover of the bacteria's feed basis by mixing in other biomass. With our technology, you are securely and flexibly positioned.

The extrusion process increases the viscosity and reduces the shear strength of the biomass, which leads to improved pump and valve passability. This results in lower energy requirements for pumps, increases efficiency and promotes sustainability.

Extruded material has the optimum starting temperature for the work of bacteria. The bacteria start decomposing the biomass almost immediately. The friction generated during the process as well as the resulting pressure and relaxation cycles generate heat and lead to optimally tempered starting material.

The extruder enables you to process a wide range of different raw materials. This gives you a secure and future-proof position. The technology offers maximum flexibility thanks to its almost limitless variety of applications.

The improved ratio of carbon and nitrogen in the digestate ensures good fertility, which is particularly interesting for soil plants and improves agricultural use and further processing.

Long service life and the use of agricultural waste and residual products ensure sustainability throughout the entire life cycle of the product. The modular design of the wear parts and the intelligent design of the system help to protect resources and the environment. Your maintenance and spare parts costs are reduced as only the worn segments of the auger and the wear inserts need to be replaced.

Increased productivity ensures investment security, while trouble-free operation of the system offers high process reliability. With over 70 years of experience and a wealth of knowledge, Lehmann is your one-stop shop.

Thanks to the counter-rotating screws, the extruder ensures optimum mixing and blending of the starting materials. This leads to the formation of a homogeneous end product and ensures optimum further processing. At the same time, the extruder enables the direct production of the desired final mixture, eliminating the need for additional process steps. You benefit from cost savings and optimize your processes.

The improved ratio of carbon and nitrogen in the digestate ensures good fertility, which is particularly interesting for soil plants and facilitates agricultural use and further processing.

The bioextrusion process increases the surface area of the raw materials millions of times, resulting in an excellent water storage capacity, especially with regard to wood fiber materials. Extruded material is therefore perfect for potting soil and similar applications.

Reliable and constant feeding of the raw materials into the extruder using suitable dosing and feeding technology from Lehmann maximizes throughput rates and increases profitability. We adapt the entire system with conveying and dosing technology precisely to your application and local conditions and optimize your processes.

The extruder enables the processing of a wide range of different base materials. This means that you are securely positioned for the future and benefit from maximum flexibility thanks to the system's almost unlimited range of applications.

You have the option of having fibers produced with the extruder certified according to RAL.

You open up new markets and address new target groups. This increases your sales potential and positions you for the future.

Long service life and the use of residual forest wood and wood chips for the production of fibrous materials ensure sustainability over the entire life cycle of the extruder. The modular design of the wear parts and the intelligent design of the system help to protect resources and the environment by reducing wear and the need for spare parts. The extruder can be used to produce peat-free soils, which consist largely of fibrous materials from renewable raw materials. With our extruder, you make a contribution to climate and environmental protection.

Long service life and the use of agricultural waste and residual products ensure sustainability throughout the entire life cycle of the product. The modular structure of the wear parts and the intelligent design of the system help to protect resources and the environment. Your maintenance and spare parts costs are reduced, as only the worn segments of the auger and the wear inserts need to be replaced.

Until now, rice straw was considered a waste product of agriculture, had no further use and was burned in the fields of India, releasing considerable amounts of CO₂. Our extruder enables the profitable utilization of all types of straw, especially rice straw, in biogas plants. With our technology, you not only reduce greenhouse gas emissions, but also fully exploit additional potential and cost benefits.

Increased productivity ensures investment security, while trouble-free operation of the system offers high process reliability. With over 70 years of experience and a wealth of knowledge, Lehmann is your one-stop shop.

Our patented screw system consists of counter-rotating screws that generate several pressure and expansion cycles. Friction causes the temperature in the system to rise sharply and high pressure triggers the steam explosion process. The biological starting material is broken up by steam explosion and partially broken down into the cell structure. This leads to an extreme increase in surface area, and no additional steam, water or heat needs to be added to the process.

In particular, our patented process enables the use of lignin-containing substrates such as straw (e.g. wheat, rice, hemp straw, miscanthus, etc.), solid manure (by-products) and much more in the biogas plant. The digested material is also used to produce biofuels. This innovative technology allows you to significantly increase your gas yield and benefit from the economical use of agricultural residues and waste products in your plant. At the same time, you prevent the formation of floating layers, which leads to a reduction in the agitation energy required and therefore to cost savings. In addition, the digested material is used for the production of biofuels.

The screws are designed to fit your process, the materials being processed and your areas of application. The screws are specially hardened to ensure a particularly long service life.

The modular design of the screws ensures sustainability throughout the entire product life cycle and minimizes your maintenance and wear costs, as only the worn module of the screw is replaced. The screws are located in so-called wear inserts, which also have a modular design and are made of special wear-resistant material. When maintenance is required, the inserts can be replaced easily and quickly. The wear inserts are manufactured in two different material thicknesses and are changed individually depending on the condition of the screws, which in turn extends the service life of the screws.

The system also enables the precise addition and mixing of different starting materials, resulting in a homogeneous end product. At the same time, a reliable and constant output quality and rate is ensured.

The intelligent control system enables easy integration of the extruder, is fully automatic and is equipped with frequency converters as standard. Load monitoring ensures that the extruder is operated at a higher speed for a short time in the event of an overload. If faults occur in the system, the extruder reverses automatically, i.e. it moves backwards briefly and then forwards again to clear blockages on the screws. This process is carried out up to 3 times in succession. If the fault persists, the system stops automatically and sends a signal. Thanks to the clear service display, the control system is intuitive to operate and user-friendly.

The system is made from high-quality materials and has an extremely robust design to reduce wear to a minimum. The system is also particularly easy to maintain and service, as the wearing parts are easily accessible and can be replaced quickly and easily by trained personnel. The system can be easily opened without the use of a crane by simply unscrewing a cover. the modular design of the components, such as the screws and wear inserts, makes it possible to replace only the individual worn module (screw segment) instead of the entire screw in the event of wear. This minimizes maintenance work and costs, helps to conserve resources and makes the extruder particularly sustainable.

The long service life and maintenance intervals help to reduce your costs, increase profitability and shorten the amortization period.

We are characterized in particular by our outstanding worldwide after-sales service. From on-site installation and commissioning to spare parts service and training - we are your reliable partner.

We plan, design, manufacture and install the system, tailored to your needs. A perfect fit and without compromise

We offer you and your employees comprehensive training and provide a wide range of practical tools. This enables you to carry out maintenance and service work independently, competently and safely. You benefit from time and cost savings.

Individual tests with your materials are possible in our technical center. In this way, we guarantee you maximum safety. At the same time, we are always open to new ideas and areas of application and look forward to agile collaboration.

Our service staff have many years of experience and master every challenge with excellence and perfection. We adapt the systems precisely to your application. We analyze and optimize your processes. Through agile collaboration, you can make your processes even more efficient and fully exploit your potential, resulting in considerable cost savings.

Our high level of vertical integration enables us to implement individual solutions with special requirements and provide you with the right system. We are your agile engineering partner.