When Closed Loop London began producing food contact grade HDPE from transparent bottle material back in 2008 it was B+B Anlagenbau GmbH and Erema Engineering Recycling Maschinen und Anlagen GmbH who provided the technical solution for this pioneer work. The successful collaboration has now been continued through the expansion of the existing plant capacity to 4,800 kg/h in total.Process
The processing steps comprise Dry cleaning - Air classification - Hot wash - Sink float separation - Mechanical drying from B+B and subsequent extrusion with upstream decontamination from Erema. This process enables Closed Loop London to produce rHDPE pellets from HDPE milk bottles for direct food contact in line with EFSA requirements.High-quality material treatment
The basic principle of B+B's plant concept is to treat the regrind material in a dry state as long as possible while it is in the process. This means that expensive resources such as water can be saved and no elaborate plant engineering is required for processing.The core component of the washing facility is the hot wash which removes any unwanted elements such as stickers or adhesives from the regrind material. This particular application also features the removal of milk residues and the associated odours as a crucial part of the cleaning process. The hot wash system works continuously and is fully automatic to ensure maximum availability and minimum maintenance intervals.
