 |
Investigation of Methods for Perchlorate Destruction in Aqueous Waste StreamPotsdam, NYSource: American Water Works Association Research Foundation (AWWARF) Information, December 2000, and AWWARF website, available at http://www.awwarf.com/research/perch.htm. Project Summary: The following text was excerpted from information supplied by American Water Works Association Research Foundation (AWWARF), December 2000, and AWWARF website, available at http://www.awwarf.com/research/perch.htm: This research will evaluate non-biological technologies for destruction of perchlorate to allow waste stream disposal or recycle. Objective Evaluate at bench-scale, non-biological technologies for destruction of perchlorate which will allow safe waste stream disposal or recycle. Background A number of processes are available for perchlorate removal from drinking water. Many of these processes, e.g., ion exchange, membranes, etc., are likely to produce concentrated waste streams containing perchlorate. A means of dealing with the concentrated perchlorate stream is needed for successful implementation and use of the primary processes. Research Approach Perchlorate contamination of drinking water is currently impacting the source-water of at least 12 million consumers. Effective treatment technologies for perchlorate removal or destruction are needed immediately. In order to expedite the research process, this project will be undertaken in two phases with the intent that one of the contractors selected for Phase I will continue as the contractor for Phase II. Phase II continuation of the project will be contingent upon several factors including: success of Phase I, availability of funding for Phase II, and PAC and AWWARF approval of the detailed scope for Phase II work. The AWWA Research Foundation reserves the right to issue a Request for Proposals (RFP) for Phase II work if this is deemed appropriate. The Crafton-Redlands Plume in the Redlands, California area will be required to be investigated as a pilot-scale study site in Phase II. Phase I research will be conducted at the bench- or laboratory-scale. Before this work is initiated a discussion of environmentally acceptable levels of perchlorate in various residuals generated by drinking water facilities should be presented. Types of residual (e.g., liquid, solid) together with final disposal options should be addressed. The desired target level(s) for perchlorate in various residuals will serve as guidance for the laboratory- bench-scale studies which should: Determine impact/limitations of a residual's physical and chemical components on the perchlorate treatment process, e.g. nitrate (NO3), total dissolved solids (TDS), trichloroethylene (TCE), natural organic matter (NOM), etc. Characterize process by-products and potential impacts on final disposal of residual. Determine chloride mass balance. Decisions would be made at the end of Phase I to determine whether or not to proceed to Phase II and the best option for distribution of Phase I results (e.g., printed report, journal article). Phase II Following completion of the laboratory- bench-scale work in Phase I, a separate pilot-scale project would be initiated in approximately two years. The pilot-scale work will further develop the most promising bench-scale treatment system(s). In general, the pilot-scale work would evaluate:
Additional Info Source: American Water Works Association Research Foundation (AWWARF) Information, December 2000, and AWWARF website, available at http://www.awwarf.com/research/perch.htm. |
|
||||
      
|
||||||