AWWA MTC64635

The Eastern Municipal Water District (EMWD) recently completed construction of the new 10 mgd (expandable to 40 mgd) Hemet (California) Water Filtration Plant (HWFP). The core of the facility's filtration and disinfection process is a ZeeWeed 500d ultrafiltration membrane system utilizing a new membrane tank design. This paper discusses the tank design and how it allows the facility to operate at 98 percent recovery while providing 4-log removal of Cryptosporidium to exceed requirements of the new Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR). Includes figures.