Biothelys thermal hydrolysis – operating experiences
Mountford, L., Bigot, B. and Nawawi-Lansade, D., Veolia Water Solutions and Technologies, UK
(free)
Safe and cost effective disposal of sewage sludge is one of the biggest challenges currently facing the industry.
This Paper will discuss operating experience from a number of Biothelys Thermal Hydrolysis plants. The objective of the Thermal Hydrolysis process is to hydrolyse organic solids to solubilise them and make them more readily biodegradable.
The paper will focus on the simplicity of the System and the operational flexibility that the benefits of Biothelys Thermal Hydrolysis bring to the End User.
Case Studies will be used to demonstrate the process performance commercial Thermal Hydrolysis plants.
The reduction of the retention time within anaerobic digesters provide impacts such as volatile solids removal, better sludge dewaterability and a considerable reduction in the quantity of sludge for recycling.
Energy recovery is optimised in the form of biogas from biological sludge digestion whilst producing high quality sludge free of pathogens, stabilised, with minimal odour and with good fertilising characteristics making final recycling to agriculture a practicable option.
Design features of Biothelys Thermal Hydrolysis plants currently under construction will also be presented.
