Biotransformation of phosphogypsum by bacteria isolated from petroleum-refining wastewaters

The biotransformation of phosphogypsum in cultures of sulfate-reducing bacteria (SRB) isolated from crude petroleum-refining wastewaters or purified using activated sludge method was studied. Selection was with the microcosms method on Postgate and minimal medium with different carbon sources, Emers...

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Bibliographic Details
Published in:Polish journal of microbiology 2005, Vol.54 (2), p.169-173
Main Authors: Wolicka, Dorota, Kowalski, Włodzimierz, Boszczyk-Maleszak, Hanka
Format: Article
Language:English
Subjects:
Activated sludge
Biodegradation, Environmental
Biotransformation
Calcium Sulfate - metabolism
Culture Media
Industrial Waste
Petroleum
Petroleum industry wastewaters
Phosphogypsum
Phosphorus - metabolism
Sewage - microbiology
Sulfur-Reducing Bacteria - isolation & purification
Sulfur-Reducing Bacteria - metabolism
Waste Disposal, Fluid - methods
Water Microbiology
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Summary:The biotransformation of phosphogypsum in cultures of sulfate-reducing bacteria (SRB) isolated from crude petroleum-refining wastewaters or purified using activated sludge method was studied. Selection was with the microcosms method on Postgate and minimal medium with different carbon sources, Emerson medium and petroleum-refining wastewaters. Highest hydrogen sulfide production, in excess of 500 mg/L, was observed in culture of microorganisms isolated from purified petroleum-refining wastewaters in Postgate medium with phenol as sole carbon source. 76% phenol reduction with simultaneous biotransformation of 2.7g phosphogypsum/L (1350 mg SO4/L) was obtained. The results regarding post-culture sediment indicated 66% utilization of phosphogypsum introduced into the culture (5 g/L), which reflects the active biotransformation of phosphogypsum by the community selected from the wastewaters.
ISSN:1733-1331
2544-4646