Have trickling filters been used successfully in the past for the treatment of landfill leachates to improve their quality (cleanliness)? If so, what improvements does it make to the contaminants present?
Thank you both Michael and Atul. Do either of you know the effect of this on pH?
It is not possible to say what effects treatment will have on the pH value as this depends on the leachate status. If it is ‘’young’’ ie the landfill is in an active stage generating volatile fatty acids, the typical leachate pH value is 5.5 to 6.5. Expect treatment to increase pH value. Alternatively, if the landfill is “mature” with less anaerobic decomposition, the pH value will be around 7.5 to 8.5; in this case treatment would be expected to reduce the pH value.
Characteritics of landfill leachate changes with time. Based on age of landfill , young, intermediate and mature/old leachate are exist. Trickling filter is a type of attached growth process, it reduces a part of BOD and SS. Commonly it is inefficient in removal of heavy metals. Trickilling filter is more suitable for young leachate,
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