AWWA ACE68713

This powerpoint presentation had the following technical objectives:utilization of a fluidized bed bioreactor (FBR) treatment system totreat 50 gpm of perchlorate laden water into potable water;complete treatment system consists of a fluidized bed bioreactor,aeration vessel, multimedia filter, LGAC unit, and a UV system; and,a year-long testing period was conducted that includedself-seeding of system, downstream equipment effectiveness,challenge experiments involving feed and electrical system shutdowns,on-line nitrate and perchlorate analyzer capabilities,chlorination and UV disinfection studies, andperchlorate spiking study. The technical approach is presented, along with technical progress, a spiking study, and operating costs. Presentation conclusions indicate that:nitrate and perchlorate removed by indigenous bacteria in FBRwithin 27 days of start-up;downstream equipment produced effluent water with oxygen >7.0mg/L, turbidity <0.3 mg/L, TTHM <80 µg/L, HAA5 <60 µg/L, noE.Coli production;challenge experiments demonstrated rebound performance of theFBR as low as 2 hours (no more than 24 hours);nitrate analyzers and perchlorate analyzer were effective, a back-up nitrate analyzer is recommended;disinfection studies demonstrated, CT of 4 and a UV contact time of 6 seconds a log 3+ removal of HPC;spiking study of 1000 µg/L of perchlorate, treatment to below California State MCL of 6 µg/L of perchlorate, andall other Title 22 requirements met for drinking water. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

27

File Size:

1 file , 2.9 MB