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Thermochemical processes

Thermochemical methods are employed for either significantly reducing the sludge solids content, or pre-treating sludge upstream of anaerobic digestion (AD) to increase the biodegradability of the organic carbon. When operated at elevated temperatures, i.e. for solids destruction rather than for AD pre-treatment, they provide energy recoverable either as heat (for oxidative processes) or a combustible gas or liquid (non-oxidative processes).

Thermochemical processes related videos

Example of biomass pyrolysis treatment scheme Source: skocu / YouTube

Example of biomass pyrolysis treatment scheme

Example of biomass pyrolysis treatment scheme, whereby biomass is subjected to high temperatures, to concentrate the carbon and improve its grindability.


Thermochemical processes 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.

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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