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Life cycle assessment of Polychlorinated Biphenyl contaminated soil remediation processes

Busset, Guillaume and Sangely, Matthieu and Montréjaud-Vignoles, Mireille and Thannberger, Laurent and Sablayrolles, Caroline Life cycle assessment of Polychlorinated Biphenyl contaminated soil remediation processes. (2012) International Journal of Life Cycle Assessment, vol. 17 (n° 3). pp. 325-336. ISSN 0948-3349

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Official URL: http://dx.doi.org/10.1007/s11367-011-0366-7

Abstract

Goal and scope. A life-cycle assessment (LCA) was performed to evaluate the environmental impacts of the remediation of industrial soils contaminated by polychlorobiphenyl (PCB). Two new bioremediation treatment options were compared with the usual incineration process. In this attributional LCA, only secondary impacts were considered. The contaminated soil used for the experiments contained 200 mg of PCB per kg. Methods. Three off-site treatments scenarios were studied: 1) bioremediation with mechanical aeration, 2) bioremediation with electric aeration and 3) incineration with natural gas. Bioremediation processes were designed from lab-scale, scale-up and pilot experiments. The incineration technique was inspired by a French plant. A semi-quantitative uncertainty analysis was performed on the data. Environmental impacts were evaluated with the CML 2001 method using the Simapro software program. Results and discussion. In most compared categories, the bioremediation processes are favorable. Of the bioremediation options, the lowest environmental footprint was observed for electric aeration. The uncertainty analysis supported the results that compared incineration and bioremediation but decreased the difference between the options of aeration. The distance of transportation was one of the most sensitive parameters, especially for bioremediation. At equal distances between the polluted sites and the treatment plant, bioremediation had fewer impacts than incineration in eight out of thirteen categories. Conclusions. The use of natural gas for the incineration process generated the most impacts. Irrespective of the aeration option, bioremediation was better than incineration. Recommendations. The time of treatment should be taken into account. More precise and detailed data are required for the incineration scenario. More parameters of biological treatments should be measured. LCA results should be completed using ecological and health risk assessment and an acceptability evaluation.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://link.springer.com/article/10.1007%2Fs11367-011-0366-7
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
French research institutions > Institut National de la Recherche Agronomique - INRA
Other partners > VALGO (FRANCE)
Laboratory name:
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Centre d'Application et de Traitement des Agroressources - CATAR-CRITT Agroressources
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France)
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Deposited By: Claire VIALLE
Deposited On:23 Mar 2012 10:21

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