US 10,260,212 B2Granted

Simple method for determining breakthrough time of anti-seepage liners in landfill

AssigneeHohai University

InventorsWei Zhu, Shi Shu, Shengwei Wang, Haoqing Xu, Xihui Fan

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Abstract

A method for determining breakthrough time of anti-seepage liners in a landfill, includes (a) detecting a leachate sample of the landfill to determine the initial concentration C0 of pollutants, and monitoring the leachate head h of the landfill; (b) determining the pollution-causing concentration CA of the pollutants according to functional orientation of local groundwater of the landfill; (c) determining, related parameters of the anti-seepage liners including the thickness z of the anti-seepage liners, the permeability coefficient k of the liners, and the porosity n of the material of the liners, and determining the related parameters of pollutant migration including the effective diffusion coefficient Da* and the mechanical dispersion coefficient Dm of the pollutants in the anti-seepage liners, and the adsorption retardation factor Rd of the anti-seepage liners on the pollutants; and (d) calculating the breakthrough time t of the anti-seepage liners according to a formula, t = nR d ⁢ z 2 ( h + z ) ⁢ k ⁢ ( ( a ⁡ ( C 0 C A ) b ) ⁢ ln ⁡ ( ( h + z ) ⁢ k n ⁡ ( D a * + D m ) ) + c ) .

Claims3

Dependent claims

A method for determining breakthrough time of anti-seepage liners in a landfill, comprising the following steps:

(a) detecting a leachate sample of the landfill to determine an initial concentration Co of pollutants, and monitoring a leachate head h-of the landfill;
(b) determining a harm-causing or pollution-causing concentration CA of the pollutants according to a functional orientation of local groundwater of the landfill;
(c) determining, related parameters of the anti-seepage liners and related parameters of pollutant migration, the related parameters of the anti-seepage liners comprising the thickness z of the anti-seepage liners, a permeability coefficient k of the anti-seepage liners, and a porosity n of a material of the anti-seepage liners;
and the related parameters of pollutant migration comprising an effective diffusion coefficient Da* and a mechanical dispersion coefficient Dm of the pollutants in the anti-seepage liners, and an adsorption retardation factor Rd of the anti-seepage liners on the pollutants;
and
(d) calculating the breakthrough time t of the anti-seepage liners according to a formula:
t
=
nR
d
⁢
z
2
(
h
+
z
)
⁢
k
⁢
(
(
a
⁡
(
C
0
C
A
)
b
)
⁢
ln
⁡
(
(
h
+
z
)
⁢
k
n
⁡
(
D
a
*
+
D
m
)
)
+
c
)
where a, b, c are state coefficients independently.

56 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/767,651Filed 13 Jun 2017
Priority: CN 2016 1 115092214 Dec 2016
Published: US 2019/0085525 A121 Mar 2019
Granted: 16 Apr 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E02D 31/004
Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution: sealing liners
E02D 31/006
Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution: sealing of existing…
E02D 2300/0037
Materials: clays
E02D 2450/106
Impermeable: for liquids