Sewage Sludge Treatment

Sewage sludge is a by-product of sewage treatment. It takes two forms; semi-solid waste (raw or digested biosolids) and slurry (liquid sludge). Both forms of sewage sludge require further treatment before they can be safely disposed of or recycled.

Our lime solutions play an essential role in sewage sludge treatment. Biocal quicklime (calcium oxide) is widely used for the treatment and hygienisation of raw or digested biosolids. Kalic and Kalic HS liquid lime (suspension of calcium hydroxide) are used to aid the concentration of the solid contents of liquid sludge in preparation for dewatering.

We also offer a range of specialist lime solutions for the pasteurisation of treated sludge; the final stage in a process that turns a potentially harmful waste stream into a safe and natural fertilizer for use on agricultural land.

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Lime products used in sewage sludge treatment

Renowned for their purity and consistency our sewage sludge treatment solutions conform to the ADAS Safe Sludge Matrix requirements, optimise operational efficiency, reduce treatment costs and offer a safe, sustainable alternative to other chemical treatments


Hydrated Lime

The Limbux range includes a comprehensive choice of high quality hydrated limes, including specialist grades to meet specific applications.

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Liquid Lime

Kalic pre-prepared liquid limes are highly stable in suspension and very fast reacting. This not only makes them easy to use and store, but also extends plant life and lowers maintenance costs

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Biocal Quicklime

The Biocal range of quicklime solutions has been specifically developed for the treatment of dewatered or digested biosolids.

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No. 1

leading producer of lime in the UK


Buxton Lime Firms was formed


Number of employees


operational sites across Europe

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To see how our sewage sludge treatment solutions can help you optimise operational performance and reduce costs, contact us today to arrange a consultation or site visit.

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