Exelys™ continuous thermal hydrolysis
Exelys™ is an innovative and complete sludge reduction solution that works in continuous mode, combining thermal hydrolysis and anaerobic digestion.
By coupling thermal hydrolysis and anaerobic digestion, Exelys™ offers better performance than conventional digestion and optimizes sludge treatment by producing:
- 25 to 35% less dry matter
- 30 to 50% more biogas
- No odours
- A pasteurised digestate, for safe agricultural reuse.
Exelys™ treats all kinds of biological sludge and can also handle grease.
Features & Benefits
Exelys works continuously and has simplified operation and maintenance with a small footprint.
This process allows:
- Reduced digester size
- Reduced operating costs:
o Less sludge to remove
o At existing installations, the digestion capacity can be increased by upto 100%.
- Income is generated from:
o Processing external inputs through co-digestion
o Selling the energy produced by co-generation or producing bio-methane
Exelys™ is a solution that guarantees energy and environmental performance, thanks to:
- Conversion into "green" electricity via co-generation
- Bio-methane production (for injection into the network or as fuel)
- Low steam consumption
- Reduced carbon footprint
- Many possibilities for using biogas: with external input (co-digestion), energy self-sufficiency or even a positive energy footprint may be achieved by the plant.
Exelys™ combines with other Veolia sludge treatment processes such as Athos™ (hydrothermal oxidation), Pyrofluid™ (incineration), BioCon™ (thermal drying), Solia™ (solar drying) to offer even more sustainable solutions.
Continuous thermal hydrolysis operating 24 hours a day with feed and removal levels that are adjustable in real time, Exelys™ operates under controlled temperature (165°C), pressure (9 bar) and duration time (approximately 30 minutes) conditions.
The system is controlled by a PLC that modulates the steam flow rate in line with the amount of sludge injected.