کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4485905 | 1316969 | 2007 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Inhibition and recovery in a fixed microbial film leachate treatment system subject to shock loading of copper and zinc Inhibition and recovery in a fixed microbial film leachate treatment system subject to shock loading of copper and zinc](/preview/png/4485905.png)
The impacts of shock loadings of copper and zinc (up to 50 mg l−1) on the treatment efficiency of a mesoscale-fixed microbial film landfill leachate treatment system were investigated. Treatment inhibition and recovery were monitored in sequence over two 36 h experimental runs. The fate of added metals was also investigated.Copper, and to a lesser extent zinc, added to the treatment systems accumulated on the biofilm media. Increasing copper inputs (>10 mg l−1) progressively inhibited biological treatment of ammoniacal-nitrogen and carbon; this inhibition persisted into the recovery phase for nitrogen but not for carbon. Only the highest input of zinc affected media metal contents and carbon treatment rates; the latter inhibitory effect did not persist into the recovery phase. A small proportion of the metals accumulated on the biofilm media during the inhibition phase was released into the bulk leachate during the recovery experiment. These findings suggest a need to manage metal inputs into leachate treatment systems in order to ensure their continued efficacy.
Journal: Water Research - Volume 41, Issue 18, October 2007, Pages 4129–4138