Landfill disposal of limestone dual-alkali flue-gas-desulfurization waste. Final report

Technical Report · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:7023778

Fox, L K; Gibson, E D; Pierson, J F; Brown, D M

A landfill disposal test program was undertaken to demonstrate the addition of fly ash and lime to calcium sulfite-sulfate flue gas desulfurization (FGD) wastes and to establish design and operating guidelines for an environmentally acceptable waste disposal system. A lined, diked landfill disposal site was partially filled with waste mixtures of FGD filter cake, fly ash, and lime. Field samples were assessed in terms of engineering properties and leachate quality. Laboratory mixtures were analyzed for comparison with field samples. Revegetation studies were performed with laboratory mixtures to determine how fly ash and FGD sludge affect plant growth and to identify candidate species for on-site testing. Fixation and stabilization improved the shear strength and reduced the compressibility of the laboratory mixtures tested. Laboratory testing of the properties of fixed filter cake indicated that mixtures of filter cake with a solids content of 56%, a fly ash-to-filter cake ratio of 1:1, and a lime content of 3% have a natural water content below the liquid limit and appear to be suitable for landfill. Lime fixation also reduced steady-state leachate concentrations of major constituents (total solids, sulfate, and calcium) and may help to minimize trace metal concentrations. Grasses were identified as the preferred species for vegetating landfills.

• Research Organization: Little (Arthur D.), Inc., Cambridge, MA (USA)
• OSTI ID: 7023778
• Report Number(s): EPRI-CS-2559; ON: DE83900146
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ASHES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CEA-ADL DUAL ALKALI PROCESS
CHEMICAL REACTIONS
DATA
DESULFURIZATION
DISPERSIONS
EQUIPMENT
EXPERIMENTAL DATA
FEASIBILITY STUDIES
FLUE GAS
FLY ASH
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
GRASS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MANAGEMENT
MIXTURES
NUMERICAL DATA
OXYGEN COMPOUNDS
PLANTS
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PREFERRED SPECIES
RESIDUES
REVEGETATION
SANITARY LANDFILLS
SCRUBBERS
SHRUBS
SLUDGES
STABILIZATION
THERMAL POWER PLANTS
TREES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES