COMPREHENSIVE META ANALYSIS OF WORLDWIDE LANDFILL LEACHATE

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2022-6-28
Ergene Şentürk, Didar
Landfill leachate data compiled from 220 different landfills from 46 countries in Europe, Middle East, Asia, Africa, and America were analysed by multivariate statistical approach for the assessment of main properties as well as variation of leachate characteristics with respect to landfill age, climate, and development status. Results showed that inorganic content of leachate has the highest correlations with each other as well as accounting for the majority of variation in leachate. Changes in leachate composition were observed in statistically significant manner with respect to climate, landfill age, and development status only for some parameters including pH, BOD, COD, and BOD/COD ratio. On the other hand, most of the parameters particularly inorganics did not show any statistically important difference between impact groups. Change in leachate quality with time was found significant only in relatively low precipitation climates. Landfill age effect was observed on the organic content of leachate while most of the inorganics were not found statistically different with time. On the contrary, in high precipitation climates, organic content and biodegradability were found low without any time effect, whereas inorganic content was found fluctuating in high quantities. In that respect, leachate age definition in current literature as young, medium, and old needs to be re-evaluated by taking into consideration the climate impact with particular attention to precipitation rates. Comprehensive leachate database and results of statistical analyses suggest that leachate management methods should be evaluated differently for landfills in high and low rainfall climates as well as in developed and developing countries.

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Citation Formats
D. Ergene Şentürk, “COMPREHENSIVE META ANALYSIS OF WORLDWIDE LANDFILL LEACHATE,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.