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Aerobic digestion

Aerobic digestion is the degradation of the organic sludge solids in the presence of oxygen. The oxygen is introduced as fine bubbles of air into the reactor. The micro-organisms in the sludge convert the organic material to carbon dioxide and water, and the ammonia and amino species to nitrate. Aerobic digestion resembles the conventional activated sludge (CAS) process but excludes a wastewater feed and employs longer solids retention times.


Aerobic digestion related videos

Conventional activated sludge (CAS) process Source: Judd Water & Wastewater Consultants / YouTube

Conventional activated sludge (CAS) process

Aerobic wastewater treatment with classical activated sludge. A taster for Judd Water & Wastewater Consultants' 'MBR Insights' training package, in this video Simon Judd explains classical aerobic wastewater treatment.

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Aerobic digestion features and blogs

Fig. 4.  SP filtrate and acidified sludge samples
Feature

Phosphorus recovery by sludge acidification and dewatering

A pilot-scale Danish study of phosphorus extraction from acidified anaerobic and aerobic sludge samples has revealed removal to be more effective from anaerobic sludges, even though the digested sludge alkalinity increases the total acid demand.

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