Leachate Chemistry: Its Implications for Cloggingby Bruce E. Rittmann, (M.ASCE),
Ian R. Fleming,
R. Kerry Rowe, (M.ASCE),
Abstract: The clogging of leachate collection systems is controlled by interrelated mi and chemical phenomena. Mesocosms containing landfill materials and simulating leachate collection were infiltrated with actual landfill leachate and monitored for water-quality changes. The results showed that the entire process is driven by microbial conversion of volatile acids, primarily acetic acid, to CO2. These reactions consume acidic hydrogen, cause a pH rise in the bulk liquid, and increase total carbonates in the leachate. The last two features allow or accelerate the chemical precipitation of CaCO3 the dominant inorganic species in the slimes found in leachate collection systems.
Subject Headings: Leachates | Chemistry | Landfills | Acids | Microbes | Infiltration | Water quality | Hydrogen | North America | Colorado | United States
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