From the Sector

Breaking new ground in plastics recycling means assessing the value chain from end to end. The big opportunities for the future are in fine-tuning the individual process steps; from the collection of recyclable materials to the recycling process and the end product. This is where the cooperation of Lindner and the EREMA Group comes in, officially launched following the 50/50 founding of the holding BLUEONE Solutions in August 2023 to which shares of Lindner Washtech were contributed. The expertise of EREMA, a manufacturer of extruders and filtration solutions for plastics recycling and the largest company within the EREMA Group, has now been combined with the expert know-how from Lindner Washtech, a leading provider of all-in-one solutions for shredding, sorting and washing plastic feed materials.

Data transfer ensures more efficient recycling processes
Process control is an especially important aspect of plastics recycling, which is why standardising the process control system was what the two companies focused on first. "Together, we have developed a platform that allows data to be exchanged between the extruder and the washing system," says Manfred Hackl, CEO of the EREMA Group at IFAT in Munich. "This enables us to analyse the data more precisely so that effective improvement measures can be deduced." All key parameters are taken into account and monitored via a digital interface. For example, it is possible to use information relating to the current throughput of the EREMA Pre Conditioning Unit to optimise the washing process as soon as possible so that it can compensate for fluctuations in capacity and achieve a significant increase in output. This data transfer represents a new step on the roadmap to digitalization.

High efficiency due to smart energy management
"To ensure sustainable recycling, it is necessary to find the right process for each application and to make sure that the individual process steps are perfectly coordinated," emphasizes Michael Lackner, Managing Director of Lindner. Coordinating the process steps has already achieved initial success in energy management, and a clear example of this is heat recovery. "We use the latent heat generated during the extrusion process as an energy source for the washing and drying process," explains Lackner. "This enables our customers to sustainably reduce their energy costs and carbon emissions".

Making the most of synergies along the value chain
Synergies need to be used to establish the quality standards specified for each end application. "The key question is how we can improve the end product and increase the overall efficiency of the recycling process at the same time," agree Manfred Hackl and Michael Lackner. This will only work if companies work together along the value chain. The industry leaders can already point to several examples where together they have improved recycling processes and made it possible to move away from downcycling. "An example of this is the recycling loop of HDPE starting material, which is processed into high-quality, food-safe rHDPE pellets using our two technologies," says Lackner. Lindner Washtech and EREMA continue to work intensively together to develop strategies for upcycling plastics and increase recycling rates.

On June 1, EREMA hosted the EREMA Discovery Day focusing on the post consumer segment from a European perspective. Live demonstrations showcased the latest machine innovations for PET and polyolefin recycling.

The invitation was accepted by around 400 customers and partners, mainly from Europe, to find out about the wide range of recycling technologies for PO and PET plastic waste. The technology that was presented and explained by EREMA experts and guest speakers during lectures in the morning, could then be seen live in-action in the afternoon when the recycling machines were demonstrated in operation. A total of six innovative recycling technologies were on display: INTAREMA® TVEplus® DuaFil® Compact, INTAREMA® TVEplus® RegrindPro® + ReFresher, the COREMA® cascade extrusion system, a VACUREMA® Inline Sheet line equipped with new EcoGentle technology, the new INTAREMA® FibrePro:IV machine, and the PCU-
TwinScrew. These allowed visitors to witness their performance and the high quality of recycled pellets that they produce.

"This wide range of technologies is necessary because the recycling process each of our customers choose depends on the type of plastic, the level of contamination of the input material, and which product will be made using the recycled pellets. Following the expansion of our Ansfelden site and with the new site nearby in St. Marien, we can now demonstrate all these processes, carry out test runs with customers' material and focus on development work independently of our Customer Centre," says EREMA's Managing Director Markus Huber-Lindinger.

EREMA is driving forward research and development work in the company's new R&D Centre. Two halls with a total area of 1,550 square metres and a new office building offering space for 50 workplaces has been built. Here, the company bundles cross-departmental test machines and laboratory facilities for post consumer and inhouse recycling applications. R&D is decentralised at EREMA. Employees from different departments handle process engineering challenges, innovations in mechanical engineering and automation technology - all with the aim of meeting customer requirements and achieving the highest possible quality of recycled pellets.  

On the evening before Discovery Day, EREMA celebrated its 40th anniversary together with customers and partners. A review covered the company's history - from the first workshop in a garage in 1983, to its position today as a innovation pioneer and one of the market leaders.