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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.

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Thermochemical processes features and blogs

HTC/AD integration flowsheet
Feature

Co-processing of sewage digestate by hydrothermal carbonisation

Hydrothermal carbonisation (HTC) can be used to co-process anaerobic digestion (AD) digestate and lignocellulosic (or plant-based) feedstocks to improve the the hydrochar product quality. This AD waste co-processing route has been studied at bench scale.

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