Adoption of DAF as a pre-treatment method for desalination plants

We are thinking of adopting dissolved air flotation (DAF) as a pre-treatment method for desalination plants. Your points of view, advice and experience about adopting DAF for desalination are welcome! 

Some of the questions I have are:

1. Is DAF efficient for water treatment for desalination?
2. Which kind of coagulant is preferred for seawater desalination process?
3. Which parameters play key roles in flotation of seawater?

Please give your suggestions.