Innovative extrusion process reduces odor in post-consumer plastic recycling

Post-consumer plastic recycling faces a persistent challenge: unpleasant odors. Addressing this issue, Maris has unveiled a pioneering extrusion process tailored to tackle odorous contamination effectively.

Breaking down odors: One of the most pressing concerns in post-consumer plastic recycling revolves around mitigating unpleasant odors. Maris has stepped up to the challenge with an innovative solution.

Odorous contamination in plastics typically stems from organic sources, predominantly food residues and fuel tanks. This pervasive issue has long hindered effective recycling efforts, prompting Maris to develop a targeted approach.

The endeavor to combat odorous contamination involved a collaborative effort between Maris and Università del Piemonte Ovest. This partnership enabled a multifaceted approach to address the challenge comprehensively.

Maris' tailored extrusion process boasts several distinctive features designed to combat odorous contamination effectively. The extruder is characterized by its unique specifications and downstream equipment, ensuring optimal performance. The extruder, specifically designed for this recycling process, features advanced specifications such as Do/Di = 1.55 and an extruder length of 48 L/D.

The contaminant reduction process is executed in two phases, each meticulously engineered to maximize efficiency. The first phase involves high thermal melting and degassing, followed by the injection of water and subsequent degassing in the second phase.

To ensure optimal odor reduction and VOC removal, rigorous testing was conducted to identify the most effective process conditions. Thirteen samples underwent thorough analysis using Headspace Sampling and GC-MS analysis.

The layout of the extrusion line, depicted in Figure 1, showcases the key components of Maris' innovative solution. From the extruder to the pelletizer, each element plays a crucial role in ensuring effective odor abatement.

Maris' extrusion process represents a significant advancement in the realm of post-consumer plastic recycling. By effectively addressing odorous contamination, this innovative solution paves the way for more sustainable and efficient recycling practices.