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Wet air oxidation

Wet or wet air oxidation of sludge is the thermal degradation, hydrolysis and oxidation of organic matter at elevated temperatures and pressures. The process does not generate secondary pollutants such as dioxin, furans, NOx (oxides of nitrogen) and SO2 (sulphur dioxide). It can be operated either to enhance the biodegradability of the sewage sludge or to substantially mineralise the organic matter (i.e. convert it to bicarbonate and carbon dioxide).

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Wet air oxidation features and blogs

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Feature

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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