AWWA ACE68915

This powerpoint presentation begins by providing a brief overview of the water treatment plant in Hutchinson, Minnesota. Key study issues include the following: exceeding copper corrosion standards as defined in theLead and Copper Rule (LCR) in distribution systems;city under Enforcement Order from Minnesota Department ofHealth, 90th Percentile Cu = 1.8 to 2.3 mg/L >> 1.3 mg/L required; high iron concentration- 2.6 mg/L Fe;biological growth occurring within distribution system;disinfection byproduct formation- meet projected Stage 2 requirements (40THM / 30HAA); and,chlorine demands were significantly different between thetwo treatment trains using the same water supply- West Plant: Chlorine Demand ~ Chlorine Dosage- East Plant: Chlorine Demand ~ 7+ times Chlorine Dosage. Two treatment trains are presented with finishedwater pH adjustment, along with biological filtration processrequirements, biological filter start-up, and biological filtration benefits. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

20

File Size:

1 file , 4.9 MB