The Effect of Landfill Leachate on the Mobility and Fecundity of Daphnia magna.

概要

論文の詳細を見る
In order to evaluate treatment performance and biological effects of landfill leachate, we conducted bioassay procedure for the raw landfill leachate collected from an actual landfill disposal site and the effluent treated by the biological activated carbon fluidized bed (BACFB) process and ozone treatment using D. magna for acute and chronic exposure. The sublethal effects of landfill leachate and its effluent on the survival, reproduction and growth of D. magna were monitored for 24 hours and 21 days, respectively. The algae Chlorella sp.2×106cells⋅ml-1 was used to feed the daphnids. The results showed that the EC50, NOEC (No Observed Effect Concentration) and LOEC (Lowest observed Effect concentration) for raw landfill leachate were 6.0%, 2.5% and 10%, respectively, showing severe toxic. Reproduction as well as survival was significantly reduced if the raw leachate concentration is more than 10%. On the other hand, the effluent treated by BACFB and ozone showed little toxicity. These results suggest that the hybrid treatment system with BACFB and ozone treatment process is efficient to remove toxic substances from landfill leachate.
日本水処理生物学会の論文