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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 / YouTube

TerraNova® Ultra Hydrothermal Carbonization of Sewage Sludge

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

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Hydrothermal liquefaction features and blogs

Schematic of intensification of AD by thermal hydrolysis, showing thickening, TH, AD and post-AD DW. Coversion of biogas be CHP engine included.
Blog

Pretty intense: the intensification of sewage sludge processes

Sludge intensification processes increase the sewage sludge solids concentration through thickening/dewatering or the biogas generation by digestion. But at what point do you stop extracting more water from the sludge or enhancing biogas production?

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