Waste pretreatment unit

By using the right shredding and separation technologies, contaminated biogenic waste can be recycled. The resulting liquid goes into wet digestion. Shredding With low speed The process starts With the Crambo dual-shaft shredder. Its teeth and screen basket are configured for the materials. If the input contains a large amount of plastic, a combination of Terminator and screen drum can be used. Either way, the job of these Iow-speed shredders is to shred and open up the packaging of the organic content. Dissolve it The key component of the treatment stage is the transfer of the organics into the liquid phase. The pulper used performs several tasks. In batch operation, the organics are shredded further and homogenised in the process water. Packaging is emptied and cleansed by the high flow speed. At the same time, heavy material is separated off through a sluice. Separation by screening Raw substrate exits the pulper onto a Multistar star screen, connected downstream. The liquid with the su- pended organic material flows throught the star screen and is collected in a trayfrom where it is pumped, via sand seperation and hygenisation, into the collection tank. Oversized particles are discharged via the star screens and water is removed in a press. Transfer to ferrnenter From the settling tank, the cleaned digestion liquid passes through a tube macerator. It then goes to an eccentric screw pump, which serves as the interface to the anaerobic digestion process.