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1560581 NTIS Accession Number: PB91-236109/XAB Biotechnological Slurry Process for the Decontamination of

Zxcavated Polluted Soils (Doctorial thesis) Kleijntjens, R. Technische Hogeschool Delft (Netherlands). Corp. Source Codes: 016196000 Sponsor: Ministerle van 0nderwijs en Wetenschappen, Zoetermeer (Netherlands). Report No.: ISBN-90-9004259-8 18 Jun 91 221p Languages: English Doctunent Type: Thesis Journal Announcement:GRA19123 Sponsored by Ministerie van Onderwijs en Wetenschappen, Zoetermeer (Netherlands). NTIS Prices: PC AI0/MF AO3 Country of Publication: Netherlands In the thesis the development of a new biotechnological slurry

process for the decontamination of excavated polluted soils is described. The slurry process is especially designed to decontaminate soils polluted with organic compounds (e.g. oil). Crucial in the slurry process is the use of three phase (soil- water-air) suspended bioreactors. In these reactors, an aerated suspension of polluted soil particles is sustained under conditions (pH approx. = 7, temperature approx. = 30C) which favor the microbial conversion of the pollutant. In the bioreactors, natural microbial con~nunities are used, orginating from polluted harbor sludge.

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