• AWWA JAW56685
Provide PDF Format

Learn More

AWWA JAW56685

  • Journal AWWA - Bench-Scale Evaluation of Innovative Arsenic-Removal Processes
  • Journal Article by American Water Works Association, 09/01/2002
  • Publisher: AWWA

$15.00$30.00


Effective Jan. 23, 2006, the maximum contaminant level(MCL) for arsenic (As) will be reduced from 50 to 10 ug/L,and removing As to meet the new MCL is anticipated to costUS utilities $0.2-0.7 billion per year. These compliance costs willbe greatly reduced if innovative As-removal technologies areproven and implemented. Using a jar-test protocol, this studyevaluated the performance of conventional coagulation/sedimentation,microsand-ballasted coagulation, coagulation-assistedmicrofiltration, and microsand-ballasted coagulation/microfiltrationto compare the relative effectiveness of innovative coagulation-based treatment processes on As removal. The various technologieswere evaluated in waters that simulated a variety ofcommon surface water and groundwater conditions.Microsand-ballasted coagulation provided promising Asremoval in bench-scale tests of simulated waters; however, nosynergistic benefits were observed when it was used as apretreatment to microfiltration. Polymer was critically importantto the performance of the microsand-ballasted coagulationprocess. Although coagulation/microfiltration typically providedthe best As removal at a given iron dose, microsand-ballastedcoagulation processes are likely to be a promising alternativemethod of As treatment if their lower projected capital andoperating costs are proven valid. Utilities screening for least-costAs-removal techniques to meet the new As MCL mayfind this protocol useful in evaluating potential treatmenttechnologies. Includes 10 references, tables, figures.

Related Products

AWWA ACE65201

AWWA ACE65201

Planning for Knowledge Retention Now Saves Valuable Organizational Resources Later..

$12.00 $24.00

AWWA JAW17549

AWWA JAW17549

Journal AWWA - 226Ra and 228Ra in Water Supplies ..

$15.00 $30.00

AWWA ACE99544

AWWA ACE99544

GAC and PAC Systems Analysis: Implications of the Regulation of s-Triazine Metabolites..

$12.00 $24.00

AWWA JAW48150

AWWA JAW48150

Journal AWWA - SDWA Capacity Development..

$15.00 $30.00