- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- The influence of biological and chemical clogging on...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
The influence of biological and chemical clogging on the transmissivity of geonets in secondary leachate collection systems of waste containment facilities Noyon, Mark Anthony
Abstract
Geosynthetics are used in a wide variety of applications, including lining and drainage of waste containment facilities. A limited amount of data were available on the clogging potential of geonets and needed to be addressed. Using leachate from a MSW landfill simulated realistic conditions. In addition, a hydraulic gradient and confining stress of 0.02 and 300 kPa respectively were used as constant test parameters. Clogging rates of 36 and 96 hours were observed with new leachate that was high in iron. Reduced rates of clogging occurred where the leachate strength was lower. All tests did, however, have rapid clogging (all test combinations would have clogged within 100 days). This clogged material pooled in the pores of the geonet and did not adhere strongly to either the geonet or the geomembrane. Differences were observed with the various combinations. Textured geomembranes had higher rates of clogging than smooth geomembranes. High density polyethylene did not reduce the cross sectional area of a geonet as much as low density polyethylene. Both the transmissivity values of the geonet as well as the geonets imprint on the geomembrane substantiated this. Geonet orientation appears to have the greatest effect on transmissivity with those geonets having their channels oriented more in the direction of flow having higher transmissivities. Further testing is, however, needed to determine if geosynthetic use in leachate collection and detection systems is adequate.
Item Metadata
Title |
The influence of biological and chemical clogging on the transmissivity of geonets in secondary leachate collection systems of waste containment facilities
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
1994
|
Description |
Geosynthetics are used in a wide variety of applications, including lining and
drainage of waste containment facilities. A limited amount of data were available on the
clogging potential of geonets and needed to be addressed. Using leachate from a MSW
landfill simulated realistic conditions. In addition, a hydraulic gradient and confining stress
of 0.02 and 300 kPa respectively were used as constant test parameters.
Clogging rates of 36 and 96 hours were observed with new leachate that was high
in iron. Reduced rates of clogging occurred where the leachate strength was lower. All
tests did, however, have rapid clogging (all test combinations would have clogged within
100 days). This clogged material pooled in the pores of the geonet and did not adhere
strongly to either the geonet or the geomembrane.
Differences were observed with the various combinations. Textured
geomembranes had higher rates of clogging than smooth geomembranes. High density
polyethylene did not reduce the cross sectional area of a geonet as much as low density
polyethylene. Both the transmissivity values of the geonet as well as the geonets imprint
on the geomembrane substantiated this. Geonet orientation appears to have the greatest
effect on transmissivity with those geonets having their channels oriented more in the
direction of flow having higher transmissivities. Further testing is, however, needed to
determine if geosynthetic use in leachate collection and detection systems is adequate.
|
Extent |
2410082 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2009-02-25
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0050414
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
1994-05
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.