This powerpoint presentation begins by presenting a brief overview of the city of Ripon, California, and the challenges it's facing that include:
increasing water
demand;
nitrate and arsenic
occurrence; and,
costly disposal of high
strength brines. A brief overview of Sulfur Modified Iron: SMI-III® is presented, along with an integrated nitrate and arsenic
removal pilot system, and the pilot system schematic. SMI-III® pilot study objectives included: determine SMI-III media
performance including
optimal empty bed
contact time
[EBCT] and
optimal pH conditions; treated effluent nitrate
goal
- 36 mg/L as NO<sub>3</sub><sup>-</sup>, and
8 mg/L as N;
co-occurring
contaminant removal;
operation with
coagulation/filtration; and,
initially characterize
residuals stream. Project phases included: Phase A
- determine the operational
conditions, with respect to pH
and EBCT that could
consistently achieve the water
quality goals, and
evaluate the treatment system
residuals quantity and quality;
Phase B - identify the optimal conditions for long-term
operation; and,
Additional Testing - evaluate the impact of hydraulic loading rate (HLR). Study conclusions include the following:
achieved 36 mg/L as NO<sub>3</sub><sup>-</sup> treated
water nitrate goal at pH 6.0, EBCT of
30 minutes;
nitrate reduction and removal are
independent of raw water
concentration;
temperature is a key factor; and,
SMI-III operated well with pH
depression and coagulation/filtration. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.3 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 31 |
| Published : | 11/01/2009 |
