In an effort to maximize the use of recycled water, the Los Angeles Department of Water and Power (LADWP) will be implementing indirect potable reuse for its Donald C. Tillman Water Reclamation Plant. The facility will utilize advanced water treatment (AWT) processes, consisting of
microfiltration (MF), reverse osmosis (RO), and advanced oxidation to produce potable quality water for groundwater recharge. LADWP has conducted 16 months of pilot testing in order to optimize operating conditions and evaluate alternative processes. This paper discusses results of pilot
testing used to evaluate potential improvements to the standard advanced treatment facility operating conditions, including: The use of secondary effluent instead of the tertiary effluent as AWT feed water The
use of sequential chlorination instead of the traditional chloramination ahed of the MF and RO membranes The use of a 14 gallon per day per square foot (gfd) flux instead of the standard 12 gfd for the RO membranes. Results
of the pilot testing are discussed, along with the implications for design of the future AWT facility.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.