The most common method of handling collected leachate is on-site treatment. When treating leachate on-site, the leachate is pumped from the sump into the treatment tanks. The leachate may then be mixed with chemical reagents to modify the pH and to coagulate and settle solids and to reduce the concentration of hazardous matter. Traditional treatment involved a modified form of activated sludge to substantially reduce the dissolved organic content.
I can recommend starting with Williams (2005) Waste Treatment and Disposal. 2nd. Wiley.
I have more references if you would like to discuss.
Dear Prathap,
I suggest you the following interesting links
http://www.image.unipd.it/tetrawama/S2005/leachate_treatment.pdf
http://www.sciencedirect.com/science/article/pii/S168740481300031X
http://www.chemeng.lth.se/exjobbR/E709.pdf
http://www.chemeng.lth.se/exjobb/E486.pdf
http://www.ozonia.com/media/pdf/app/leachate-e.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/322412/Guidance_for_the_Treatment_of_Landfill_Leachate_part_2.pdf
http://dergipark.ulakbim.gov.tr/jbes/article/viewFile/5000160872/5000145120
With my best regards
Prof. Bachir ACHOUR
Kindly find attached a publishef article that i believe might be of relevance to your question
Article System Dynamics Modeling of Dumpsite Leachate Control in Ogb...
Dear Biddut,
Unfortunately, the possibilities of flotation is not fully understood in this master thesis.
kind regards
Dear Biddut,
For some basic insights you may kindly have a look at this link:
http://www.sciencedirect.com/science/article/pii/S168740481300031X
Regards
Krishna
Please go through the link given above which is a good treatise of the subject.