Eject foreign matter faster with the Debris Removal System Depending on the cosubstrates chosen, large quantities of foreign matter can occur in biogas plants. Until now, removal was quite complicated, which is why it pays to supplement the PreMix with the innovative Debris Removal System (DRS) by Vogelsang. It ejects foreign matter separated out while the PreMix is still running. Equipped with the DRS system, the PreMix does not need to be switched off or opened. Compared with conventional solutions, DRS completes the process in one sixth of the time, and can even be partially automated with a corresponding control. In addition, only roughly 15 l of medium is ejected with the heavy material. This not only avoids trouble and irregularities in feeding solid matter, it means that only a little of the suspension needs to be led back. Automatic disposing of foreign matter with the Debris Lift Unit The Debris Lift Unit is the ideal addition to the Debris Removal System, enabling professional foreign matter handling. The heavy material ejected by the Debris Removal System (DRS) during ongoing operation is automatically tipped into a collection container by the DLU shortly after, that only need to be emptied occasionally. The entire lifting process is automated so that monitoring and manual intervention are no longer necessary. Thanks to that handling foreign matter becomes more hygienic and small amounts of foreign matter doesn´t have to be removed manually. 12 | 13 PreMix Performance The PreMix cleverly combines four steps into one compact unit designed to feed an extremely wide range of cosubstrates. Design and operating principle The universal PreMix system is a combination of our easy-to-maintain progressive cavity pump (CC series) with the effective RotaCut. The PreMix already separates any heavy material out while the cosubstrates fed into the system by a feed screw at the side are mixed with the liquid suspension added at the same time (e.g., recirculated matter, liquid manure) in the large mixing chamber. The RotaCut cuts any coarse and fi brous particles in the organic suspension, and homogenizes the medium optimally, before it is fed to the digester. As the cosubstrates are in the form of a mashed, pump- able suspension that promotes bacteria growth, one PreMix can easily supply multiple digesters. Separating out foreign material and cutting harmful matter also extends the lifetime of the pump unit. At the same time, the thorough treatment creates ideal conditions for high gas yields. Thanks to its space-saving design, the compact PreMix fi ts into every plant and is therefore also easy to retrofi t. Maintenance and repairs One feature of the PreMix is its great ease of service and maintenance. All necessary work, including wear part replacement, can be completed quickly and easily on-site. This minimizes operating downtime. The innovative swivel- ling mechanism allows maintenance and replacement of parts on the pump unit without dismantling parts of the pipe. The cutter is easily accessible through the large service fl ap. This allows the cutting blades and screen to be replaced in a few easy steps. Applications Thanks to the multifunctional design of the PreMix, it can be fed with a wide range of cosubstrates and treat them reliably. For example, pulpy food waste, bulky crops or even dry renewable resources like straw or woody grass.