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Thermal conditioning processes can be employed to improve the efficiency of both dewatering and anaerobic digestion and are usually based on either wet air oxidation or hydrothermal treatment. This results in partial degradation of the sludge solids, making the resulting material more biodegradable as well as more dewaterable than the untreated sludge.

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The CAMBI hydrothermal sludge treatment process Source: CAMBI THP / YouTube

The CAMBI hydrothermal sludge treatment process

Video demonstrating the CAMBI THP and anaerobic digestion process to produce biogas.

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Anaerobic digestion optimization through thermal hydrolysis pre-treatment

Pre-treatment of sludge by thermal hydrolysis upstream of anaerobic digestion is used to improve AD efficiency. A study looked at (pre-)commissioning data for a full-scale AD installation undergoing upgrading with TH to assess the basis for optimisation.

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