AWWA ACE63070

This slide presentation outlines a plant optimization project to meet the Disinfectant/Disinfection Byproduct (D/DBP) Rule. Issues outlined include: Disinfection Byproducts;TOC Removal;Cold water turbidity removal; and,Disinfection Profiling. A two track approach was used:remove as much turbidity andorganic matter as possible; and,refine disinfection for best CT. The project involved the Broad Brook Plant in Meriden, Connecticut, with characteristics that include:Largest Individual Source ¿¿¿¿¿¿¿¿ 4.3 mgd;conventional plant processes upgraded in 1976;most complex chemical treatment options; and,seasonal manganese episodes. Plant findings include:alum coagulated total organic carbon (TOC) but floc didn't settle incold water (verified in jar tests);if UV@254 removal >50%, TOC removal >35%;powdered activated carbon worked best whenadded at rapid mix (jar tested first, then fullscale) and resulted inbetter TOC removal,less chlorine demand, andsmall un-baffled clearwell. Jar test findings are outlined and results of the Meriden Plant optimization included:better coagulant for cold water was found;separated powdered activated carbon (PAC) from pre-chlorine, resulting in betterorganic removal, lower chlorine demand;UV@254, tool to measure TOC removal; and,spreadsheets for disinfection profiling. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2006

Number of Pages:

22

File Size:

1 file , 860 KB