Sludge Hygienisation

Chemical stabilisation of sludge with quicklime: pathogen reduction, lower water content, higher dry matter, odour control.

Data Sheet

Sewage sludge is a persistent challenge for every wastewater treatment plant. For process and sanitary reasons, sludge processing and disposal is often supplemented by hygienisation, carried out by mixing the sludge with quicklime.

This process, also known as chemical sludge stabilisation, involves mixing dewatered sludge with lime. This alters the properties of the sludge particles and achieves far-reaching stabilisation and hygienisation.

Advantages

Reduction of pathogenic organismsReduction of organic compound content (volatile solids fraction)Reduction of water content in sludgeIncrease in sludge dry matter (DM)Immobilisation of certain heavy metals in sludgeOdour controlImproved sludge transportability

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Technical Data

Process Characteristics
Parametr	Wartość
Process	chemical stabilisation (hygienisation) of sludge
Reagent	quicklime (CaO)
Feed	dewatered sludge
Result	stabilisation, hygienisation, increased dry matter

Lime dosage and system configuration are selected to match the sludge type. Details available on request.