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Hydrothermal carbonisation

Hydrothermal carbonisation (HTC) converts sludge predominantly into a carbon-rich hydrochar solid product. The process is conducted at temperatures generally between 180 and 300 Ā°C, with corresponding pressures above 10āˆ’88 bar to ensure that the water is maintained in the liquid state. Reaction times ranging between 0.1 and 4h have been employed. The precise conditions of temperature, pressure and time selected depend both on the feed sludge quality and the target yield and characteristics of the hydrochar product.

Hydrothermal carbonisation related videos

HTCycle HTC technology Source: IPI AG / YouTube

HTCycle HTC technology

A video to demonstrate HTCycle HTC technology.

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Hydrothermal carbonisation features and blogs

Fig. 4.  SP filtrate and acidified sludge samples

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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