Plant engineering waste management

Bio waste is collected regionally and internationally in various containers. The volume of a receiving container must be large enough to buffer a sufficient quantity. Robust technology is important for removal from receiving. Ideally, the biowaste is already thoroughly pre-homogenised in the hopper, which opens large (re)packaging and ensures a uniform substrate supply for the actual separation. We adapt this receiving system precisely according to the planned throughput and the expected waste composition. Robust, wear-resistant screws are used, which are precisely matched to the throughput of our  depackaging machine DRM. Installation at ground level is possible, as well as in a basement optimised for offloading the vehicles. The container can be supplemented with walkable covers and flaps for vehicle acceptance.

The biowaste is brought in containers for waste treatment. This often includes individual large refuse containers delivered by vehicles. Depending on the number of large refuse containers per day, it makes sense to automate the emptying process. Single and multiple tipping stations are possible. As a rule, there should be an automatic pre-rinse after emptying to minimise the transport of biowaste into a downstream container washing machine. There are two possibilities: hoisting over a container placed at ground level or emptying into a recessed container. If the throughput is high, bin handling, including removal, can be fully automated. We choose the optimal variant in close coordination with our customers and taking into account the on-site situation.

The input material is transported to the grinding chamber of the DRM via a receiving container and a screw conveyor. The  DRM is designed for the reliable separation of the biogenic content from foreign matter or contaminants from various waste streams. The goal is the optimal cleaning of the respective substrate from the very beginning of the process. The special design enables high separation performance while greatly reducing the energy consumption per bin. This makes the high-performance DRM technically as well as economically appealing to customers who want to separate larger quantities of waste continuously.

The foreign matter separated out by the DRM is usually disposed of thermally. The liquid content in the foreign matter leads to increased costs. That is why our screw press removes moisture. Additional separated liquids are collected and passed back to the organic fraction. The screw press consists of a solid stainless steel screw surrounded by a segmented basket sieve. This basket sieve separates out liquids. In terms of performance and design, the screw press is always adapted to the type of waste and the throughput of the DRM.

Refuse containers must be cleaned after they are emptied so that they can be returned to households or supermarkets hygienically. For washing, the following factors are decisive: throughput, effectiveness, as well as energy and water consumption. Washing machines can be filled either manually or automatically directly from the tipping stations. Generally speaking, bins are transported to the clean area during or shortly after washing. There, the bins can be automatically issued, stowed or removed manually and are available to be reloaded onto the vehicle. We adapt the washing machine technology to suit the required throughput.

It can make sense to supplement our proven DRM technology with further processing steps. These may include screening or dissolving techniques before processing. After processing, glass and “grid” separation can come into play. If the biowaste is very heterogeneous or very large foreign substances need to be dissolved, a shredder can be used. The use of a bag opener is always useful when very large packaging needs to be opened. It stops at large contaminants, which can be easily removed by hand. The bag opener is usually integrated into the hopper in the interest of “lean” plant engineering, which positively affects a plant’s separation result. Star screens can be used instead of a crusher if large substances need to be continuously discharged from the process without being crushed.