MT-MixBox: No fear of foreign materials in the biogas plant
• Innovative wet feeding system with active separation of foreign materials • Reliable protection of pumps and mixers • Reduction of wear and maintenance costs
The problem-free dosing of solid biomass into a digester is the key to effective use of a biogas plant. However, in practice the solids contain a high percentage of foreign material such as stones, scrap metal or silage cover material. A conventional wet entry system without the separation of foreign material often causes significant problems in the feeding system itself or in the biogas plant components. The foreign materials disturb the smooth operation of the biogas plant and are responsible for high component wear.
The biogas specialist MT-Energie presents an ideal solution at Agritechnica 2011 with the innovative „MT-MixBox“ wet feeding system. In contrast to the well-known systems, the MT-MixBox can handle the task of reliably separating the foreign materials without crushing before it feeds into the digestion line. The active separation is achieved by using a two-chamber system and centrifugal forces. Afterwards the cleaned mixture of solids and substrates can be brought into the plant without any problems.
Since the foreign materials are not crushed, the separation is carried out with particularly low wear as well as low energy expenditure. This is a considerable advantage compared to conventional systems. Particularly the discharging pump of the wet feeding system is protected effectively against foreign materials and has a longer operating life than systems which feed a mixture of solids and substrate containing foreign materials. Also the subsequent systems of the biogas plants are protected against increased wear thanks to the separation of the foreign materials. Maintenance and wear costs for pumps or mixers can be thus reduced significantly.
Furthermore, the MT-MixBox offers all the known advantages of a wet feeding process. These include for example positive biological effects on the substrate degradation, a reduction of the floating and sediment layer, a reduced mixing requirement as well as more even gas production and a homogeneous gas composition. Last but not least, the MT-MixBox allows flexible substrate logistics for the supply of several digesters.
Thanks to the compact design, the component requires only a little space in the biogas plant. Because the MT-MixBox is installed directly at the discharging screw conveyor of the solid feeding system, further screw conveyors, i.e. for the vertical transport or support work, are not necessary. This has a positive impact on the investment costs and causes less wear and energy expenditure.
