Topic Home
Oxidative thermochemical treatment
An introduction to oxidative sludge thermochemical treatment methods
Sludge thermochemical treatment
Thermochemical methods for sludge
Thermochemical methods are used 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.
As with stabilisation and drying processes, thermochemical processes produce a stable sludge product. When operated at elevated temperatures, i.e. for solids destruction rather than AD pre-treatment, they provide energy recoverable either as heat or a combustible gas or liquid.
From our sponsors…
Example of a commercial biomass gasification process
An example of Valmet's gasification technology
Latest features and blogs
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. Read article
Topic
Sludge treatment − pyrolysis
Pyrolysis refers to the decomposition of organic matter at elevated temperatures in the absence of oxygen and water
Topic
Sludge treatment − gasification
Gasification is an extension of the pyrolysis process for thermochemical treatment of sludge
Topic
Sludge treatment − hydrothermal processes
Hydrothermal sludge treatment employs elevated temperatures and pressures in wet conditions and in the absence of oxygen