San Patricio (2008 improvements)

Originally constructed as a 7.8 mgd facility in 2000, the facility was expanded in 2006 to 11.3 mgd, and
to 21 mgd in 2008. Improvements for this involved pilot / demonstration to increase the membrane flux from 54 to 80 gfd, addition of 2 MF units and evaluation of alternative coagulants to improve settling and membrane system performance.

Capacity: 21 mgd

Technology: Microfiltration

SPI Role:
SPI designed the improvements to the Pall system and conducted jar testing to select an alternative coagulant. The conversion from Alum to ACH is expected to save the District about $300K/year on chemical costs.