Land application uses for dry FGD by-products. Phase 1, [Annual report], December 1, 1991--November 30, 1992

Technical Report · Thu Apr 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10166652· OSTI ID:10166652

Bigham, J; Dick, W; Forster, L; Hitzhusen, F; McCoy, E; Stehouwer, R; Traina, S; Wolfe, W ^[1]; Haefner, R ^[2]

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1. Ohio State Univ., Columbus, OH (United States)
2. Geological Survey, Columbus, OH (United States). Water Resources Div.

The 1990 amendments to the Clean Air Act have spurred the development of flue gas desulfurization (FGD) processes, several of which produce a dry, solid by-product material consisting of excess sorbent, reaction products containing sulfates and sulfites, and coal fly ash. Presently FGD by-product materials are treated as solid wastes and must be landfilled. However, landfill sites are becoming more scarce and tipping fees are constantly increasing. It is, therefore, highly desirable to find beneficial reuses for these materials provided the environmental impacts are minimal and socially acceptable. Phase 1 results of a 4 and 1/2 year study to demonstrate large volume beneficial uses of FGD by-products are reported. The purpose of the Phase 1 portion of the project was to characterize the chemical, physical, mineralogical and engineering properties of the FGD by-product materials obtained from various FGD technologies being developed in the state of Ohio. Phase 1 also involved the collection of baseline economic data related to the beneficial reuse of these FGD materials. A total of 58 samples were collected and analyzed. In summary Phase 1 results revealed that FGD by-product materials are essentially coal fly ash materials diluted with unreacted sorbent and reaction products. High volume beneficial reuses will depend on the economics of their substituting for existing materials for various types of applications (e.g. as an agricultural liming material, soil borrow for highway embankment construction, and reclamation of active and abandoned surface coal mines). Environmental constraints to the beneficial reuse of dry FGD byproduct materials, based on laboratory and leachate studies, seem to be less than for coal fly ash.

• Research Organization: Dravo Lime Co., Pittsburgh, PA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-91MC28060
• OSTI ID: 10166652
• Report Number(s): DOE/MC/28060--T4; OCDO--93017597; ON: DE93017597
• Country of Publication: United States
• Language: English

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