Comparative study of Cryptosporidium and virus passage through ultrafiltration membranes to define monitoring and compliance guidelines for water treatment and re-use schemes

摘要

This presentation will discuss portions of the permitting process with the State regulator,rnCalifornia Department of Public Health (CDPH) and the adaptation of the LT2ESTWRrnframework in the 380,000 m3/day Twin Oaks Valley water treatment plant (TOVWTP).rnThis is the largest zero-liquid discharge facility using membrane ultrafiltration, ozone, andrnbiological carbon contactors in operation in North America. Virus removal credits for thernmembrane were awarded based on an extensive pilot-scale challenge testing with surrogaternparticles to determine Cryptosporidium and virus removal at different levels of membranernintegrity (log removal value or LRV). The methodology and results are summarized in thisrnpaper.