Treatment and Stabilisation of Cellulose Fibre Residues

Wasted biomass from the Site’s activated sludge waste water treatment plant had been pumped to two large lagoons (approx 3 hectares each). Both lagoons were full and there were significant odour issues.

RPA developed a treatment process whereby the gelatinous, approx. 10% by weight solids content lagoon contents could be pump dredged, treated to remove odour and active sulphides and dewatered to form a stable solid residue. This residue was suitable for direct trucking to a dedicated mono-landfill and for placement and compaction using wheeled equipment. Again, the principal reagent that was required for the process was an existing site produced waste.

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