Caratterizzazione delle emissioni da rifiuti da Landfill Mining in reattori di laboratorio con aerazione continua o intermittente.

During the last decades, a huge quantity of municipal solid waste(MSW) was sedimented in landfills with a lack of pre-treatment. The majority of these old landfills are differentiated by either non-existent or insufficient base sealing systems and cover layers. Anaerobic declination of organic substances among landfills had consequences in organic and inorganic emissions, which constitute potential venture for soil, water, and air resources. Adopting the use of in situ aerations for biological stabilization of old landfills furnishes the probability to decrease both the actual emissions and the emission potential of the waste material. Encircling air is inaugurated into the landfill by making the use of inoculation wells and the result of evolving gas mixture is withdrawn and treated. Employment and technical implementation on a large scale have already been shown in several investigations(Cossu et al.,2003; Heyer et al., 2001,2005) and the obtainable degree of emission reduction has been demonstrated in the lab-scale experiments. Although, contemporarily there is still a deficit of awareness regarding the prolonged effects of the state of solid waste. To examine the effects and to identify the biological stability of the oxygenized solid waste, laboratory inspections including column tests, in addition to a wide-ranging field analysis on a landfill, have been implemented. The existence of anaerobic activities inside the waste mass trigger biogas production and the production of contaminated leachate for a very long time. In old landfill areas, where impervious bottom liners neither may be present nor may be damaged, this could be a source of continuous environmental pollution. Remediation insinuation involves a vital role in the procurement of environmental standards and objectives in impermeable disposal sites, in which waste stabilization has not been accomplished. Insitu aeration has been recognized as a remediation intervention for promoting post-closure care and its completion (Read et al., 2001; Cossu et al., 2003; Ritzkowski et al., 2006; Rich et al., 2008; Raga and Cossu, 2013). This experiment aimed to evaluate the biogas composition and leachate parameters under Continuous and Intermittent aeration. The experiments were carried out using four reactors; two of them were under continuous aeration and the other two of them were under intermittent aeration. The comprehensive data on the leachate quality and the biogas production were subsequently merged and examined to assess the different trends and to have a total overview of the project.