Producing high-quality compost from green waste – the process
The process combines pre-treatment, aerated composting and refining in several steps:
- Feedstock reception and preparation
Green waste (branches, leaves, grass, woody materials) and, when needed, digestate are collected and prepared for processing. - Shredding and screening
The material is reduced in size and cleaned to ensure a consistent structure for composting. - Windrow formation on aerated floor
The prepared material is arranged in windrows placed on an aerated floor system, allowing controlled air supply. - Membrane covering
Windrows are covered with a semi-permeable membrane, creating a stable microclimate that protects against weather and supports efficient decomposition. - Active composting (hygienisation phase)
Air is supplied from below, maintaining oxygen levels and thermophilic temperatures required to eliminate pathogens and ensure hygienisation. - Curing and stabilisation
After the active phase, the material continues to mature and stabilise. - Membrane removal and screening
The membrane is removed and the compost is screened to achieve a uniform product. - Product refinement and storage
The final compost is refined and stored for use.
The final product
The compost produced meets recognised quality standards, ensuring it is safe and suitable for agricultural use.
Typical characteristics include:
- Organic matter content and stable humus
- Balanced nutrient levels (nitrogen, phosphorus and potassium)
- Neutral to slightly alkaline pH
- Absence of pathogens, viable seeds and significant impurities
This makes the compost suitable for soil improvement in agriculture.