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 and
organic 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 in
cold water (verified in jar tests);
if UV@254 removal >50%, TOC removal >35%;
powdered activated carbon worked best when
added at rapid mix (jar tested first, then full
scale) and resulted in
better TOC removal,
less chlorine demand, and
small 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 better
organic removal, lower chlorine demand;
UV@254, tool to measure TOC removal; and,
spreadsheets for disinfection profiling. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 860 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 22 |
| Published : | 06/01/2006 |
