Stackable end product with minimized pathogen regrowth
The unique process utilizes small dewatered particles – ejecting directly from the rotating centrifuge bowl – which are then immediately heat seared and fixed by the primary direct heat injection stream. These solids are then further dried by the secondary hot airflow in the main drying chamber. This results in an enhanced dried granulated material with up to 50% dry solids with a sustained pathogen count below 100,000 cfu/g.
It’s possible to achieve these process results using either low-grade waste heat available at the site (75–90°C), heat generated from a fuel source, or a combination of both.
Features and benefits
- Suitable for field storage
- End product resists degradation due to weather
- Incineration friendly with a high BTU value
- Limited pathogen regrowth and low re-infection risk
- Drying performance on demand
- Efficient use of waste heat
- Flowing, consistent, small particle size, easy to convey and mix with other products
- Combination of robust and proven system components
- Continuous process
Raw sludge from product feed versus granulate from GEA biosolids Granulator
Biosolids can be safely and sustainably recycled to agricultural land
The end product opens additional end-user recycling opportunities, such as agriculture, composting, or incineration as a fuel/fuel additive.
A perfect solution for plants with limited disposal and recycling capacities that want to future-proof their processes in terms of circular economy, sustainability and ecological footprint.
GEA environmental Decanter lines – safeguarding our resources
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