Hi Justin There is an ...

Hi Justin

There is an amazing number of water industry references that confuse these terms.

I support the answers below.

Coagulation processes are those with a primary aim of charge neutralisation of a colloid.  A colloid being a particle whose size and surface charge result in such a viscous drag that it maintains the status of a suspended solid in water, not a settling solid.

Flocculation is the process of accelerating the settling rate of suspended solids by physically flocculating multiple particles of any charge into a larger structure.  A flocculation process does not necessarily involve charge neutralisation but alot do.  Flocculation is usually achieved by a polymer molecule that has a length considerably longer then the size of the suspunded solids.

Flocculation can also be used to aid sedimentation and dewatering processes.