Laboratory bioremediation experiments with soil from a diesel-oil contaminated site—significant role of cold-adapted microorganisms and fertilizers
✍ Scribed by Rosa Margesin; Franz Schinner
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1997
- Tongue
- English
- Weight
- 269 KB
- Volume
- 70
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
Laboratory bioremediation experiments were performed with soil from a diesel-oil contaminated waste disposal site ; contamination was 5580 mg hydrocarbons per kg soil dry mass. The e †ects of incubation temperatures (10¡C and 25¡C), of the addition of an inorganic fertilizer at C : N ratios of 10 : 1 and 50 : 1, of the indigenous soil microorganisms and of a psychrotrophic and a mesophilic inoculum capable of degrading diesel-oil were investigated. The highest diesel-oil decontamination rates were 43% at 10¡C and 55% at 25¡C after 30 days. The biodegradation activity of the indigenous soil microorganisms was highly increased by the use of fertilizers. The diesel-oil degradation activity of the added inocula was highest when no fertilizer was present and was inhibited by nutrient supply. Abiotic processes did not contribute to diesel-oil elimination.