Monitoring of leachate quality stored in gas ventilation pipes for evaluating the degree of landfill stabilization
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概要
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Monitoring of leachate quality is the essential measure in aftercare for evaluating landfill stabilization. Generally, the most common way of leachate monitoring is executed at inlet of leachate treatment facility. However, it does not necessarily reflect actual state of the site. Thus, not only the methodologies focusing on the discharge for the determination of facility termination but also the methodology that is capable to seize the degree of waste stabilization in landfill must be necessary. In the study, monitoring of leachate quality stored in 68 gas ventilation pipes was conducted and degree of waste stabilization at each location in the landfill was estimated by a statistical approach using the results obtained by monitoring. Leachate characteristics varied significantly for each pipe but seemed to reflect the waste condition of nearby location. Correlation among the analysed items was quite high. Namely, the difference of leachate quality seemed to be categorized by only the level of concentration but not specific characteristics. To confirm this, Euclidean distances of dissimilarity were calculated by multidimensional scaling by using six items of leachate quality and temperature. Two factors (thickness of leachate and concentration of TOC and EC) that distinguish leachate characteristics appeared. To indicate the degree of stabilization by location, spatial distribution of TOC, TN, IC, and CI were estimated by using the ordinary Kriging methodology. As the result, it was estimated that concentration of leachate existing within the landfill, especially TN, was higher than completion criteria for leachate, in most part of calculated area.
- SAGE Publicationsの論文
SAGE Publications | 論文
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