Evolution of clog formation with time in columns permeated with synthetic landfill leachate

Journal of Contaminant Hydrology
J F VanGulck, R K Rowe

Abstract

Laboratory column tests conducted to gain insight regarding the biological and chemical clogging mechanisms in a porous medium are presented. To seed the porous medium with landfill bacteria, a mixture of Keele Valley Landfill and synthetic leachate permeated through the column under anaerobic conditions for the first 9 days of operation. After this, 100% synthetic leachate was used. The synthetic leachate approximated Keele Valley Landfill leachate in chemical composition but contained negligible suspended solids and bacteria compared with real leachate. The removal of volatile fatty acids (VFAs), primarily acetate, in leachate as it passed through the medium was highly correlated with the precipitation of calcium carbonate (CaCO(3(s))) from solution. The columns experienced a decrease in drainable porosity from an initial value of about 0.38 to less than 0.1 after steady state chemical oxygen demand (COD) removal, resulting in a five-order magnitude decrease in hydraulic conductivity. The decrease in drainable porosity prior to steady state COD removal was primarily due to the growth of a biofilm on the medium surface. After steady state COD removal, calcium precipitation was at least equally responsible for the decrease in d...Continue Reading

References

Oct 29, 2002·Journal of Contaminant Hydrology·L Hrapovic, R K Rowe
Feb 1, 1982·Biotechnology and Bioengineering·B E Rittman

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Citations

Aug 14, 2012·Waste Management·R Kerry Rowe, Yan Yu
Mar 23, 2011·Journal of Environmental Management·Jaime CuevasSantiago Leguey
Apr 3, 2010·Waste Management·Kelvin T W Ng, Irene M C Lo
Sep 29, 2011·Environmental Microbiology·Ali BozorgIan D Gates
Nov 18, 2014·Journal of Environmental Health Science & Engineering·Subramaniam KanmaniKasinathan Muthukkumaran
May 24, 2012·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Edwin SafariMohammad Ali Abdoli
Nov 21, 2017·Journal of Biological Engineering·Yanan RenQiuyan Yuan
Jul 18, 2017·Environmental Technology·Nafise JamialahmadiMajid Baghdadi
May 2, 2019·Environmental Science and Pollution Research International·Rui ZhaoYiyun Liu
Apr 3, 2020·International Journal of Environmental Research and Public Health·Yili Liu, Jianguo Liu

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