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Wastes of multilayer containers as substrate in composting processes
M E Rodríguez1, G A Narros, J A Molleda
1Polytechnic University of Madrid, Madrid, Spain.
Journal of the Air & Waste Management Association (1995)
|March 1, 1995
Summary
Composting municipal solid waste with ground Tetra Brik Aseptic (TBA) containers showed partial cardboard degradation. While plastic and aluminum remained, the resulting compost had adequate nutrients and low heavy metals.
Area of Science:
- Environmental Science
- Waste Management
- Materials Science
Background:
- Multilayer containers like Tetra Brik Aseptic (TBA) are common in municipal solid waste (MSW).
- Their environmental impact and degradation during composting require evaluation.
Purpose of the Study:
- To assess the influence and degradation of ground TBA in MSW composting.
- To analyze the characteristics of the final compost product.
Main Methods:
- Two composting piles were created with MSW organic fraction and ground TBA (flakes or stripes).
- Composting piles were mechanically aerated.
- Key parameters (temperature, moisture, TOC, C/N ratio, nutrients, heavy metals) were monitored.
Main Results:
- Aluminum and polyethylene films from TBA did not degrade.
- The cardboard fraction of TBA showed partial decomposition, more effective when ground as flakes.
- The final compost, despite aesthetic issues from plastic/aluminum fragments, met nutrient requirements.
- Heavy metal content in the compost was below European limits.
Conclusions:
- Ground TBA can be incorporated into MSW composting, with cardboard showing partial degradation.
- The resulting compost is nutrient-rich and safe regarding heavy metals.
- Further research may focus on improving the aesthetic qualities of the compost by addressing plastic and aluminum residues.