The “Big Switch”: Los Angeles Aqueduct Filtration Plant Treatment Of California State Project Water

Abstract

Plant-scale tests were run in October 1987 and October 1988 to evaluate the ability of the 26.3-m³/s (600-mgd) Los Angeles Aqueduct Filtration Plant (LAAFP) to treat one of the source waters -- California State project water (SPW) -- used by the Metropolitan Water District of Southern California and to determine CT^a values for its ozone contact basins. During the test period, a large amount of water quality and operating data was collected, providing insight into the effectiveness of the preozonation/direct filtration process (followed by chlorination or chloramination) on SPW. This paper describes the results of the full-scale testing.

Key Words:

• Ozone
• Drinking Water Treatment
• Los Angeles Aqueduct Filtration Plant
• California State Project Water
• CT Values
• Owens River Water
• Geosmin; 2-Methylisoborneol
• Disinfection Byproducts
• Ozone Organic Byproducts