Lime & Alkaline Stabilisation

Lime stabilisation is a fast, low-capital route: adding quicklime or hydrated lime raises pH above 12 (and, with quicklime, temperature), arresting biological activity, suppressing odour and reducing pathogens. It increases mass but needs no digester, making it ideal for small sites and emergency or interim stabilisation.

Lime stabilisation — raising sludge pH (and temperature) with lime to halt biological activity and reduce pathogens for land application.

Reynolds & Bauhm engineers the whole sludge line — stabilisation, conditioning, dewatering and drying — selecting and sizing equipment on cake dryness, polymer demand and whole-life cost, so wet tonnage and disposal cost are driven down at source.

Sludge treatment converts a dilute, unstable, high-volume waste into a stabilised, dewatered, disposable product, through a chain of thickening, stabilisation, conditioning, dewatering and sometimes drying. Because disposal is priced largely by wet tonnage and governed by stabilisation grade, decisions made in this chain dominate the whole-life cost and the available disposal routes.

Stabilisation reduces volatile solids, pathogens and odour. Anaerobic digestion — mesophilic at around 35 °C or thermophilic at around 55 °C — destroys organics and recovers biogas, thermophilic operating faster and with greater pathogen kill; aerobic digestion and lime stabilisation are simpler alternatives where biogas is not the goal. The route sets the pathogen class and therefore the permissible disposal outlet.