NATO/CCMS Pilot Study Evaluation of Demonstrated and ... - CLU-IN
NATO/CCMS Pilot Study Evaluation of Demonstrated and ... - CLU-IN
NATO/CCMS Pilot Study Evaluation of Demonstrated and ... - CLU-IN
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<strong>NATO</strong>/<strong>CCMS</strong> <strong>Pilot</strong> Project on Contaminated L<strong>and</strong> <strong>and</strong> Groundwater (Phase III) January 2001<br />
Project No. 6<br />
Rehabilitation <strong>of</strong> a Site Contaminated by PAH Using Bio-Slurry Technique<br />
Location<br />
Former railroad unloading<br />
area, northern Sweden<br />
Technical Contact<br />
Erik Backlund<br />
Eko Tec AB<br />
Näsuddsvägen 1o<br />
93221 Skelleftehamn<br />
Sweden<br />
tel: +46/910-33366<br />
fax: +46/910-33375<br />
E-mail:<br />
erik.backlund@ebox.tninet.se<br />
Project Status<br />
Interim<br />
Project Dates<br />
Accepted 1996<br />
Final Report 2001<br />
Costs Documented?<br />
No<br />
35<br />
Media<br />
Soil<br />
Technology Type<br />
Ex situ<br />
bioremediation<br />
Contaminants<br />
coal tars, phenols, cyanides, metals,<br />
ammonium compounds<br />
Project Size<br />
Full-scale (3,000 tons)<br />
Please note that this project summary was not updated since the 1998 Annual Report.<br />
1. <strong>IN</strong>TRODUCTION<br />
Results Available?<br />
Yes<br />
Eko Tec AB is a Swedish environmental engineering company dealing with problems posed by hazardous<br />
wastes, soil, <strong>and</strong> water pollution. Main clients are the oil industry, Swedish National Oil Stockpile<br />
Agency, <strong>and</strong> the Swedish State Railways.<br />
In 1995, Eko Tec was contracted for bioslurry remediation <strong>of</strong> approximately 3,000 tons <strong>of</strong> creosotecontaminated<br />
soil <strong>and</strong> ditch sediments from a railway station area in the northern part <strong>of</strong> Sweden. A<br />
clean-up criterion <strong>of</strong> 50 ppm total-PAH was decided by the environmental authorities. For the specific<br />
PAH compounds benzo(a)pyrene <strong>and</strong> benzo(a)anthracene, a cleanup criterion <strong>of</strong> 10 ppm was decided.<br />
Full-scale treatment has been preceded by bench- <strong>and</strong> pilot-scale treatability studies carried out at the Eko<br />
Tec treatment plant in Skelleftehamn, Sweden.<br />
2. SITE DESCRIPTION<br />
Not available<br />
3. DESCRIPTION OF THE PROCESSS<br />
3.1 Pretreatment<br />
The contaminated soil was initially treated to reduce volume. Stones <strong>and</strong> boulders were separated from<br />
the rest <strong>of</strong> the soil. In the next step, the soil was screened in a 10 mm sieve. Soil with a grain size less than<br />
10 mm was mixed with water <strong>and</strong> later pumped to wet-screening equipment, in which particles >2 mm<br />
were separated from the process. The remaining soil fraction (
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