Chauzy, J., 1, Cretenot, D., 1, Gilbert, A.B2, 1 Veolia Water Direction Technique, 2Veolia Water Solutions & Technologies
(free)Veolia Water’s Thermal Hydrolysis System BIOTHELYS® is now operational at the site of Saumur, an extended aeration biological nutrient removal facility. The paper details the impact of using the BIOTHELYS® process to hydrolyse the waste sludge, prior to mesophilic anaerobic digestion to enhance digestion of biological sludge. In the thermal hydrolysis stage, both live injection and flash steam recovery are employed to economically heat the sludge to the hydrolysis temperature of 160°C for a duration of circa 30 minutes. The first results together with details of BIOTHELYS® system are presented. BIOTHELYS® is a batching process. Its reaction vessels are paired, recovering flash steam from the processed effluent, which is cooled down to the adequate temperature prior to digestion. KEY WORDS Anaerobic digestion, BIOTHELYS®, Biogas, Hygienisation, Sludge, Thermal hydrolysis,
Aqua Enviro Ltd
T: 0113 8730728
c/o Tidal Accounting, HQ Offices, Radley House, Richardshaw Road, Leeds, West Yorkshire, LS28 6LE