Hydraulic and earth engineering – Subterranean waste disposal – containment – or treatment – With treatment of waste
Patent
1991-12-13
1993-03-02
Reese, Randolph A.
Hydraulic and earth engineering
Subterranean waste disposal, containment, or treatment
With treatment of waste
B09B 100
Patent
active
051904063
ABSTRACT:
A landfill cell for the containment of MSW ash is defined in part by a depression in the ground bounded by a leachate impervious liner which forms the bottom and side walls of the cell, for continuous long-term protection of underyling and contiguous aquifers from contamination by heavy metals. The cell has a base layer of a natural cationic material in the form of amended and compacted lignite, which may be enhanced by the addition of about 6 to 12% lime by weight, extending in overlying relation to the liner along the bottom and along the side walls. An overburden of the waste ash material rests on the base layer, and at least one additional layer of amended lignite is positioned immediately above the first overburden, and at least one additional layer of the waste material overburden rests on the additional layer of cationic material. The lignite is ground to a small particle size of about 0.1 mm to 2.0 mm in size and has a CEC value of about 120 meq/100 g when enhanced by the addition of lime. A method of long term storage of MSW ash in a landfill cell includes the steps of forming a layer of such amended lignite in the landfill and applying an overburden of ash immediately above that layer, in which the cationic capacity of the layer is sufficient to immobilize at least 100% of the heavy metal ions capable of being leached from the overburden, adding a second such layer of material immediately above the overburden and then adding another layer of overburden of waste material over the second layer, and so on until the cell is filled and covered.
REFERENCES:
patent: 4624604 (1986-11-01), Wagner et al.
patent: 4701219 (1987-10-01), Bonee
"Adsorptive Lignite Pre-Treatment of Seepage at the Cologne Municipal Refuse Dump", Moll et al. Vom Wasser vol. 74, pp. 13-25 (1990).
"Preparation of Cation Exchange Materials by Oleum Sulphonation of an Utrillas Spanish Lignite", Ibarra et al., Fuel vol. 63, Dec. 1984, pp. 1743-1747.
"The Use of Low Rank Brown Coal as an Ion Exchange Material" Lafferty et al., Fuel vol. 69, Jan. 1990 pp. 78-83.
"The Effect of Soil Properties and a Synthetic Municipal Landfill Leachate on the Retention of Cd, Ni, Pb and Zn in Soil and Sediment Materials", LaBauve et al., Journal Water Pollution, Federal, vol. 50, No. 3, Mar. 1988, pp. 379-385.
Shannonhouse Hugh P.
Styron Robert W.
Municipal Services Corp.
Reese Randolph A.
Ricci John A.
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