Coagulant Recovery in Water Works

James Keeley, Cranfield University / Severn Trent: PRESENTATION ONLY


1. The problems of conventional coagulant use
2. Coagulant recovery – a solution?
3. Potential in potable treatment
4. Potential in wastewater treatment
5. Outlook

Two sides to the problem:
1. Coagulant demand
• >300,000 t/y in UK
• Procurement issues
• Emerging demand from wastewater
2.  Sludge production
• >182,000 t/y in UK
• Electricity costs
• Disposal costs
• Limited reuse potential

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