AWWA ACE70795

This powerpoint presentation begins by providing a brief overview of Long Beach Water Department's (LBWD's) Seawater Desalination Program. Research project objectives include: determine the maximum sustainable intake filtration and discharge rate; and, evaluate seasonal water quality impacts on the quantity and quality, and determine if further treatment is needed (i.e. microfiltration). LBWD's research approach included: Pilot Testing (2008); Demonstration Scale (2008-2010); and, Production Plant (~2015). Research sites include a demonstration facility and a pilot testing facility. Initial data analysis of system flows demonstrates that the lower filtration rate of 0.05 gpm/ft² and the intermediate filtration rate of 0.1 gpm/ft² show no significant tidal influence on production. The secondary goal of water quality cartridge filtration system of 100 mm and 5 mm filters improves the turbidity and SDI effluent to a comparable level as the MF effluent. Discharge from system is showing no impacts from tide conditions or plugging. Includes table, figures.