title: Biotransformation of phosphogypsum by bacteria isolated from petroleum-refining wastewaters.
abstract: 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.
authors.affiliation: Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology, Warsaw Uniwersity Zwirki i Wigury 93,02-089 Warsaw, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Wolicka
authors.forename: Włodzimierz
authors.initials: W
authors.lastname: Kowalski
authors.forename: Hanka
authors.initials: H
authors.lastname: Boszczyk-Maleszak
mesh_terms: D001673:Biodegradation, Environmental; D002133:Calcium Sulfate / Q000378:metabolism*; D003470:Culture Media; D007220:Industrial Waste; D010578:Petroleum; D010758:Phosphorus / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D016999:Sulfur-Reducing Bacteria / Q000302:isolation & purification* / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014871:Water Microbiology
chemical_list: D003470:Culture Media; D007220:Industrial Waste; D010578:Petroleum; D012722:Sewage; C077769:phosphogypsum; D010758:Phosphorus; D002133:Calcium Sulfate