Natural Coagulant – A sustainable alternative to inorganic salts: PRESENTATION ONLY

Holland, A.¹ and Grundy, C.², ¹Acorn Water Ltd, Ireland, ²United Utilities, UK

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• Ofwat project on Alternative Phosphorus removal on rural wastewater treatment plants

• Metal-based salts pose numerous drawbacks when dosed at higher concentrations.

Disadvantages of Inorganic Salts

Process & Equipment

• Reduced treatment efficiency, inhibit nitrification

• Increased sludge production

• Required pH adjustment chemicals such as caustic soda

• Can cause damage to equipment

• Corrosive to pipes and infrastructure