Annual UK coagulant sludge generation from water treatment is estimated to be a minimum of 90,000 tonnes dry solids.
This WRc portfolio project identified the feasibility of cost effective recycling options for alum and ferric coagulant sludges from small and large water treatment works.
The outputs from the project include:
- a national characterisation dataset of the properties of different types of residues;
- a high level costs analysis and
- identification of recycling options offering the greatest potential for single, ‘blended’ or amended waste streams.
Coagulant sludge is a potentially valuable material. Resource recovery options would enable water treatment plant operators to increase levels of operational and environmental sustainability and reduce costs.