Filter-based treatment of leachate from an industrial landfill containing shredder residues of end-of-life vehicles and white goods.
A pilot plant was set up to treat leachate from an industrial landfill containing shredder residues of end-of-life vehicles and white goods. The treatment plant consisted of aeration and sedimentation steps for pre-treatment, and a filter. The plant was designed to simultaneously remove various types of pollutants. The efficiencies of pre-treatment and of the main treatment step were investigated over a period of 3 years at the landfill site. By continuous aeration of the leachate the concentrations of Fe and Mn were reduced by 55% and 49%, respectively. By prolonged sedimentation suspended solid content was noticeably reduced (72%). In the filter, consisting of a mixture of peat and carbon-containing ash as a treatment medium, very high reduction of polar organic compounds, e.g. phenol (74%), o-and p-cresol (91%), and 2,4-dimethylphenol (73%), high average reduction of metals, e.g. Pb (78%), Fe (74%), Cu (73%), Mn (56%), Sn (55%), and Zn (47%), and good average reduction of DOC (26%), Tot-N (23%) and NH4-N (46%) were achieved. Sixty non-polar compounds in the leachate, identified by GC-MS screening, occurred at trace level. Most of them were considerably reduced in the filter.
School of Pure and Applied Natural Sciences, University of Kalmar, Kalmar SE-391 82, Sweden. pille.kangsepp@gmail.com
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P
Kängsepp
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L
Mathiasson
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L
Mårtensson
D002244:Carbon / Q000032:analysis; D005374:Filtration / Q000295:instrumentation*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis*; D008670:Metals / Q000032:analysis; D017672:Nitrogen Compounds / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis; D010636:Phenols / Q000032:analysis; D010865:Pilot Projects; D014867:Water / Q000032:analysis / Q000592:standards; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D008670:Metals; D017672:Nitrogen Compounds; D009930:Organic Chemicals; D052638:Particulate Matter; D010636:Phenols; D014867:Water; D002244:Carbon; D010100:Oxygen