Bioremediation of contaminated harbor sediment: Development of a treatment assessment strategy
- SILT NV, Antwerp (Belgium)
- Univ. of Ghent (Belgium)
Different ex-situ microbial remediation techniques were assessed for the clean-up of contaminated sediments in the harbor of Zeebrugge (Belgium). Sediment contamination typically consisted of PAHs (5 to 1,200 ppm), TBT (up to 400 ppb) and mineral oils (400 to 8,000 ppm). In a first bench-scale phase, the remediation-efficiency of techniques based on stimulation of indigenous bacteria, a and/or 3 commercially available strains was evaluated using a combination of kinetic, {sup 14}C and respiration experiments, aimed at determining the degradation pathways and overall fate of the contaminants. At a pilot-scale 3 selected remediation techniques were assessed in four 40 M{sup 3}batch reactors (second phase). Aquatic toxicity tests were used to monitor bioremediation efficiency and the potential hazard of wastes and remediation by-products. The results from both phases of this study indicate that selected ex-situ microbial remediation techniques of contaminated sediments can remove 90% of both mineral oils and TBT, and between 70 to 90% of the total PAH concentration. Microbial, chemical and ecotoxicological aspects of this study will be discussed and details about the application of the developed assessment strategy in a full-scale treatment plant will be given.
- OSTI ID:
- 367477
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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