What are the advantages of using Ultrafiltration?

The operating cost of a UF system is lower than the cost of running a reverse osmosis system due to the lower operational pressure (lower energy consumption).
Another advantage is the high temperature tolerance of the modules. Moreover, ultrafiltration membranes can be validated. This is important because process validation is required by the pharmacopoeia.

[GMP Compliance Adviser, Chapter 5.B]