It is based on the Thelys hydrolysis process, which improves the biodegradability of organic matter, so that it can subsequently be subjected to aerobic or anaerobic biological treatment. It fits perfectly into wastewater treatment processes by operating in tandem with the sludge recirculation system.

Biothelys can be combined with the other processes developed by Veolia Water Solutions & Technologies to create complete sludge treatment solutions:

Its combination with digestion ensures that the thermal hydrolysis process is self-sufficient in energy while still producing 'green energy'.

Biothelys supports multiple recycling options through composting or thermal oxidation. Disinfection ensures proper management of the health concerns, allowing for safe agricultural recycling and nutrient recovery.

Biothelys is a flexible solution:

• can be configured to meet your specific requirements : e.g. in combination with aerobic treatment (the plant's aeration tank),
• perfectly suited to plants with wide load swings,
• using the steam produced by an industrial facility within the thermal hydrolysis process,
• effective on all types of sludge : primary, biological or mixed, be it of urban or industrial origin, whether thickened or dewatered,
• able to eliminate plant grease,
• fully automated and secure, integrating perfectly into plant operations.

BIOTHELYS is a complete solution for reducing sludge quantities. By combining thermal hydrolysis (THELYS process) with downstream biological treatment, BIOTHELYS can treat all types of sludge, whether industrial or municipal:

• during thermal hydrolysis, a part of the suspended solids is dissolved, producing a more readily biodegradable liquid sludge;
• downstream, the biodegradable matter is usually treated using anaerobic digestion.

BIOTHELYS fits perfectly into the wastewater treatment plant and offers the following advantages:

• sludge removal cost control,by reducing dramatically the produced sludge quantity by up to 80%;
• significant digester volume reduction, allowed by the treated sludge characteristics;
• biogas production maximization, due to high volatile solids removal;
• easier land applications, due to hygienised, stabilized and odourless sludge high quality.

BIOTHELYS reduces the quantity of sludge produced by up to 80% compared to conventional methods. Thermal hydrolysis is used to disinfect and stabilize sludge.

Its combination with digestion ensures that the thermal hydrolysis process is self-sufficient in energy while still producing « green energy ».

BIOTHELYS supports multiple recycling options through composting or thermal oxidation. Disinfection ensures proper management of the health concerns, allowing for safe agricultural recycling and nutrient recovery.

BIOTHELYS is a flexible solution:

• can be configured to meet your specific requirements: e.g. in combination with aerobic treatment (the plant’s aeration tank),
• perfectly suited to plants with wide load swings,
• using the steam produced by an industrial facility within the thermal hydrolysis process,
• effective on all types of sludge: primary, biological or mixed, be it of urban or industrial origin, whether thickened or dewatered,
• able to eliminate plant grease,
• fully automated and secure, integrating perfectly into plant operations.