Your web browser is out of date.

Update your browser for better security, speed and to get the best experience on this website.

Update your browser

Hydrothermal liquefaction

Hydrothermal liquefaction (HTL) of sewage sludge takes place generally at temperatures of 250–400 °C and pressures above 40 bar. The primary end product formed from the generated condensable gases is a highly viscous liquid (a bio-oil) used as either a pure chemical feedstock or an additive in diesel fuels. HTL has been has been extensively investigated for ‘cleaner’ biomass feeds, and specifically microalgae, but is less well developed than hydrothermal carbonisation for sewage sludge applications.

Hydrothermal liquefaction related videos

TerraNova® Ultra Hydrothermal Carbonization of Sewage Sludge Source: TerraNovaEnergy /

TerraNova® Ultra Hydrothermal Carbonization of Sewage Sludge

A video to demonstrate the principles of the TerraNova® Ultra Hydrothermal Carbonization of sewage sludge.

Hydrothermal liquefaction features and blogs

Blog eu biosolids disposal header

Biosolids vs sewage sludge

Biosolids are usually considered to be the useful fraction of the sewage sludge. They are generally higher in solids concentration and lower in pathogen content, having gone through a stabilisation process such as chemical dosing, digestion and/or drying.

Read article

More Hydrothermal liquefaction topics…

More process and operation topics…