Composition of leachate from old landfills in Denmark

Abstract

The Danish counties have performed numerous investigations of old landfills. These investigations have been presented in several reports, but no comprehensive summary of the findings has been carried out. The objective of this study was to evaluate the typical composition of leachates from old smaller landfills by a comprehensive review of the investigations carried out by the counties. In total 106 landfills were selected by criteria avoiding dilution effects. A database was constructed using a standard program. Statistical evaluations showed that the leachate concentrations in general decreased with the age of the landfill, and that the leachate concentrations were lower than found in other similar studies.

Present and Long-Term Composition of MSW Landfill Leachate: A Review

“…However, recent studies have shown that the quality of leachate analysis for XOCs is seriously jeopardized only if very poor sampling protocols are used (see review by Parker, 1994 (Assmuth and Strandberg, 1993;Kjeldsen and Christophersen, 2001). In general, landfill leachates may contain very high concentrations of dissolved organic matter and inorganic macrocomponents.…”

“…This has been shown by several studies in which researchers have reported metals concentrations from full-scale landfills, test cells, and laboratory studies. The ultimate conclusion of all of these studies is that heavy metals in landfill leachate at present are not at major concern Robinson, 1995;Reinhart and Grosh, 1999;Revans et al, 1999;Kjeldsen and Christophersen, 2001;Christensen et al, 1994). Table 5 gives more details of observed heavy metal concentrations.…”

“…The data presented by Krug and Ham (1997) originate from 13 municipal sanitary landfills in Wisconsin, USA, while the data from Kjeldsen and Christophersen (2001) is from 104 old Danish MSW landfills. In both studies, BTEX were the most frequently found compounds and concentrations were generally lower at the Danish landfills.…”

Utilisation des procédés électrochimiques et leurs combinaisons avec les procédés biologiques pour le traitement des lixiviats de sites d’enfouissement sanitaires - revue de littérature

“…C'est le cas du phosphore dont la concentration est généralement faible dans les lixiviats matures. Sur 106 lixiviats matures étudiés, KJELDSEN et CHRISTOPHERSEN (2001) ont rapporté une valeur moyenne de Pt = 2,7 mg•L -1…”

Hydraulic Conductivity and Landfill Construction

“…The reported full composition of leachates of different municipal solid waste landfills all over the world were presented by e.g. Ehrig (1989); Fatta et al (1998), Kjeldsen & Christoffersen (2001), Kylefors (2003), Kulikowska & Klimiuk (2008); Tatsi & Zouboulis (2002) and Ziyang et al (2009). Migration of leachates generated inside the waste body of municipal landfill to soil and groundwater is prevented by bottom liners of different construction based on porous materials of low permeability.…”