Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6354855 | Waste Management | 2014 | 9 Pages |
Abstract
A case study of landfill liquids addition using small diameter (5 cm) vertical wells is reported. More than 25,000 m3 of leachate was added via 134 vertical wells installed 3 m, 12 m, and 18 m deep over five years in a landfill in Florida, US. Liquids addition performance (flow rate per unit screen length per unit liquid head) ranged from 5.6 Ã 10â8 to 3.6 Ã 10â6 m3 sâ1 per m screen length per m liquid head. The estimated radial hydraulic conductivity ranged from 3.5 Ã 10â6 to 4.2 Ã 10â4 m sâ1. The extent of lateral moisture movement ranged from 8 to 10 m based on the responses of moisture sensors installed around vertical well clusters, and surface seeps were found to limit the achievable liquids addition rates, despite the use of concrete collars under a pressurized liquids addition scenario. The average moisture content before (51 samples) and after (272 samples) the recirculation experiments were 23% (wet weight basis) and 45% (wet weight basis), respectively, and biochemical methane potential measurements of excavated waste indicated significant (p < 0.025) decomposition.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geotechnical Engineering and Engineering Geology
Authors
Pradeep Jain, Jae Hac Ko, Dinesh Kumar, Jon Powell, Hwidong Kim, Lizmarie Maldonado, Timothy Townsend, Debra R. Reinhart,