The main purpose of this project is to evaluate the use of strong base anion (SBA)
exchange resin for the removal of dissolved organic carbon (DOC) from North Bay
Aqueduct (NBA) water. The use of SBA technology has shown considerable promise for
significant removal of DOC from raw water, resulting in reduction of coagulant and
disinfectant demands while reducing disinfection byproduct (DBP) formation.
The NBA, part of the State Water Project, is a 27-mile underground pipeline serving
municipal and industrial water users in Napa and Solano counties. Rapidly changing
water quality conditions have historically been a tremendous operator challenge for
utilities treating water from the NBA, particularly in the maintenance of stable
coagulation conditions in the treatment process. The use of SBA exchange technology
potentially offers a cost-effective way of producing safer water while lowering the overall
operating costs of water treatment.
A two-phased approach has been taken to evaluate the effectiveness of using ion exchange
technology to treat NBA water. During the first phase, bench-scale adsorption
studies were undertaken using a series of ion-exchange resins. The purpose of bench-scale
testing was to determine an appropriate SBA resin to test at the pilot-scale. The
resins were evaluated on their ability to remove natural organic material (NOM) from
NBA water prior to simulated conventional treatment.
Following the bench-scale tests, pilot-scale tests were undertaken using the resin
recommended by bench-scale testing. Pilot scale tests were performed to characterize the
benefits of ion exchange pretreatment on the downstream processes of coagulation,
sedimentation, and filtration. Optimization of the ion exchange process was followed by
observation of the performance of the downstream processes during baseline conditions
and events of elevated TOC and turbidity. Comparisons were made by using two trains,
one with SBA exchange pretreatment and one without. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 630 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 06/17/2004 |
