Degradation of the ferric chelate of EDTA by a pure culture of an Agrobacterium sp
- Genencor International, Rochester, NY (USA)
- Auburn Univ., AL (USA)
A pure culture of an Agrobacterium sp. (deposited as ATCC 55002) the mineralizes the ferric chelate of EDTA (ferric-EDTA) was isolated by selective enrichment from a treatment facility receiving industrial waste containing ferric-EDTA. The isolated grew on ferric-EDTA as the sole carbon source at concentrations exceeding 100 mM. As the degradation proceeded, carbon dioxide, ammonia, and an unidentified metabolite(s) were produced; the pH increased, and iron was precipitated from solution. The maximum rate of degradation observed with sodium ferric-EDTA as the substrate was 24 mM/day. At a substrate concentration of 35 mM, 90% of the substrate was degraded in 3 days and 70% of the associated chemical oxygen demand was removed from solution. Less than 15% of the carbon initially present was incorporated into the cell mass. Significant growth of this strain was not observed with uncomplexed EDTA as the sole carbon source at comparable concentrations; however, the ferric chelate of propylenediaminetetraacetic acid (ferric-PDTA) did support growth.
- OSTI ID:
- 5868596
- Journal Information:
- Applied and Environmental Microbiology; (USA), Journal Name: Applied and Environmental Microbiology; (USA) Vol. 56:11; ISSN 0099-2240; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540310* -- Environment
Aquatic-- Basic Studies-- (1990-)
AMINO ACIDS
BACTERIA
BIODEGRADATION
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL REACTIONS
DECOMPOSITION
EDTA
ELEMENTS
GROWTH
INDUSTRIAL WASTES
IRON
METABOLISM
METABOLITES
METALS
MICROORGANISMS
ORGANIC ACIDS
ORGANIC COMPOUNDS
TRANSITION ELEMENTS
WASTES