MODERN NORWEGIAN LEACHATE (2005-2010) COMPARED TO OLDER (1998-2002)

摘要

Regulation of hazardous, ordinary and inert waste landfills has been introduced, and the ban of landfilling of organic waste with a TOC above 10% or a LOI above 20%. There is also legislation that intends to remove or reduce as much as possible, a list of target environmental pollutants, within 2020, such as As, Pb, Cd, Cr and Hg, and a number of organic pollutants, such as chlorinated compounds, hormonaHy acitive compounds and bioaccumulative, toxic and persitant compounds such as tinorganics, PAH and fluorcontaing compounds (PFOS) (Klif, 2011). By 2011 there are 62 active landfills for ordinary waste in Norway, and 8 for inert waste We have studied changes in the average composition of leachate from municipal solid waste (MSW) landfills from 1998 to 2002, compared to 2005 to 2010, based on standard monitoring programmes from six landfills. As expected the concentrations of BOD and phosphorous have been reduced in the studied period, but not COD. Nitrogen and sulphur seem to have increased. As intended also Cd, Cr and Hg whereas Pb seems to have been increased. Also salt elements, such as Na and K, increased. Most organic parameters are reduced except for oil and pesticides. The treatment at the six locations seems to be as effective.