Semi-permeable membrane windrow composting of green waste and biowaste

This technology uses a semi-permeable membrane and forced aeration to create controlled conditions for composting a wide range of biowaste, including food waste and green waste from households.

By combining natural composting with simple technical enhancements, the system enables faster decomposition, reduced emissions and consistent compost quality, making it a flexible and cost-effective solution.

Faster and controlled composting for organic waste – the process

The process is based on aerated windrow composting under a membrane cover and includes the following steps:

  1. Feedstock reception and preparation
    Organic waste is collected, inspected and prepared for processing.
  2. Shredding and mixing
    The material is shredded and homogenised to ensure proper structure and airflow.
  3. Windrow formation
    The prepared waste is arranged into windrows (long piles).
  4. Membrane covering
    The windrows are covered with a semi-permeable membrane, creating a controlled environment that protects against weather while allowing gas exchange.
  5. Aerated composting phase
    Air is supplied through fans and pipe systems, maintaining oxygen levels and accelerating decomposition.
  6. Hygienisation and stabilisation
    The process ensures proper temperature control, allowing effective hygienisation and compliance with regulatory requirements.
  7. Membrane removal
    After the active composting phase, the membrane is removed.
  8. Refining and screening
    The compost is processed to remove impurities and achieve a uniform quality.
  9. Final handling
    The finished compost is stored or prepared for different applications.

 

The final product

The system produces certified compost suitable for:

  • Organic farming
  • Soil improvement in agriculture
  • Horticulture and landscaping

The compost is stable, mature and adaptable to different end uses.

 

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