Full Description

The Surface Water Treatment Rule (SWTR) was a major step towards requiring optimized filtration conditions. Compliance with a 0.5 NTU limit 95% of the time per the SWTR has since been superceded at many utilities by more ambitious goals such as keeping below 0.1 NTU, providing 3 log removal of cyst-sized particles, or providing filtered water with under 50 particles/ml. The proposed Disinfectants/Disinfection By-Products Rule (D/DBPR) includes a procedure for optimizing total organic carbon (TOC) removal through enhanced coagulation. These goals require optimizing coagulation and filtration conditions for removal of particulates and DBP precursors as well as the more traditional parameters such as turbidity and manganese. This paper presents a case study of plant optimization at the City of Raleigh's E.M. Johnson Water Treatment Plant, focusing on filter operations. The sometimes conflicting requirements of particulate removal, manganese removal, and control of disinfection byproducts are evaluated.

Product Details

Published: 01/01/1995 ISBN(s): 0898678358 Number of Pages: 21File Size: 1 file , 570 KB