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http://dx.doi.org/10.7857/JSGE.2012.17.3.076

Field Applicability of Low Temperature Thermal Desorption Equipment through Environmental Impact Analysis of Remediated Soil and Exhaust Gas  

Oh, Cham-Teut (OIKOS Co. Ltd.)
Yi, Yong-Min (Department of Ecological Engineering, Pukyong National University)
Kim, Young-Soung (USFK Base Relocation Office, Ministry of National Defense)
Jeon, Woo-Jin (USFK Base Relocation Office, Ministry of National Defense)
Park, Gwang-Jin (OIKOS Co. Ltd.)
Kim, Chi-Kyung (OIKOS Co. Ltd.)
Sung, Ki-June (Department of Ecological Engineering, Pukyong National University)
Chang, Yoon-Young (Department of Environmental Engineering, Kwangwoon University)
Kim, Guk-Jin (OIKOS Co. Ltd.)
Publication Information
Journal of Soil and Groundwater Environment / v.17, no.3, 2012 , pp. 76-85 More about this Journal
Abstract
Geochemical and ecological properties of remediated soil and gas exhausted from a low-temperature thermal desorption (LTTD) process were analyzed to assess the environmental impact of LTTD treatment. Soil characteristics were examined with regard to the chemical (EC, CEC, and organic matter) and the ecological (dehydrogenase activity, germination rate of Brassica juncea, and growth of Eisenia andrei) properties. The exhaust gases were analyzed based on the Air Quality Act in Korea as well as volatile organic compounds (VOCs) and mixed odor. Level of organic Organic matter of the soil treated by LTTD process was slightly decreased compared to that of the original soil because the heating temperature ($200^{\circ}C$) and retention time (less than 15 minutes) were neither high nor long enough for the oxidation of organic matter. The LTTD process results in reducing TPH of the contaminated soil from $5,133{\pm}508$ mg/kg to $272{\pm}107$ mg/kg while preserving soil properties. Analysis results of the exhaust gases from the LTTD process satisfied discharge standard of Air Quality Law in Korea. Concentration of VOCs including acetaldehyde, propionaldehyde, butyraldehyde and valeraldehyde in circulation gas volatilized from contaminated soil were effectively reduced in the regenerative thermal oxidizer and all satisfied the legal standards. Showing ecologically improved properties of contaminated soil after LTTD process and environmentally tolerable impact of the exhaust gas, LTTD treatment of TPH-contaminated soil is an environmentally acceptable technology.
Keywords
Environmental impact assessment; Low Temperature Thermal Desorption (LTTD); Soil remediation; Exhaust gas; VOCs;
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Times Cited By KSCI : 6  (Citation Analysis)
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