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Alkaline stabilisation

Alkaline stabilisation is a chemical method designed to reduce sludge odour and putrescence (i.e. decay), and the level of pathogenic organisms. This is achieved by raising the pH of the sludge using lime. The process may be supplemented by dosing with waste solid materials to reduce the amount of lime used. Although adding material to the sludge increases its volume, the process is simple, effective and low in capital cost.

Alkaline stabilisation related videos

Lime slaking and dosing, Techmatic Source: Techmatic Engineering PTY LTD / YouTube

Lime slaking and dosing, Techmatic

A video to demonstrate the principles of the Techmatic lime slaking and dosing process.

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Alkaline stabilisation 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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