Designing Polymers for Waste Water Flocculation and Dewatering

Friday, February 18, 2005, 3:30 PM

Room 825 SWM Building

Dr. Raymond S. Farinato

Cytec Industries

The separation of solids from liquids constitutes an enabling part of many industrial and practical processes. This separation can enhance the value of each phase, and only becomes economically viable if the separation can be accomplished in a timely and complete fashion. In waste water treatment the end goal is the reclamation of one of the most intrinsically valuable substances – clean water.

The inexorably slow and often incomplete separation of finely divided solids from water can be greatly improved through the use of chemical conditioning agents and mechanical conditioning processes. This strategy aims to destabilize colloidal suspensions in a manner that allows for rapid and efficient dewatering of the flocculated solids. The inherent non-equilibrium nature of the floc formation process, which results in most practical situations, means that the properties of the flocs and their dewaterability will also depend on the dynamics of the constructive and destructive events involved in their formation.

In this talk we will discuss some of the structure-performance correlations and basic concepts used as the starting point for the design of polyelectrolytes for waste water treatment.