Growth and activity of sulphate-reducing bacteria in media containing phosphogypsum and different sources of carbon

• Autorzy: Rzeczycka M , Blaszczyk M.
• Języki publikacji: EN

Abstrakty

EN

The possibility of using a mixed community of sulphate-reducing bacteria (SRB) for the biotransformation of phosphogypsum was examined. The greatest reduction of phosphogypsum (g/l) was determined in cultures with lactate (3.3), ethanol or casein (2.7), almost two-fold less in media with glucose or lactose and threefold less in medium with acetate. In media with lactate or ethanol growth inhibition (I = μ (μ max) was slight (I = 0.80 or 0.79) but much higher in the case of cultures with lactose (I=0.41), glucose (I=0.54), acetate or casein (I=0.62). In those cultures in which the concentration of sulphides was very high (about 600 mg HS⁻/l) and the concentration of acetic acid did not exceed 10 mg/l (e. g. in cultures with glucose), inhibition of SRB was mainly caused by H₂S. In cultures with transient low pH value (e. g. containing lactose or acetate) the factor causing stronger growth inhibition was acetic acid. A condition for obtaining high SRB activity in media with phosphogypsum and fermentable carbon sources is constant monitoring of the reaction of the medium and/or counteracting the accumulation of toxic concentrations of hydrogen sulphide and acetic acid.

Słowa kluczowe

EN

activity; carbon; biotransformation; bacteria; medium; growth; sulphate-reducing bacteria; phosphogypsum

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2005
• Tom: 14
• Numer: 6
• Opis fizyczny: p.891-895,ref.

Twórcy

autor

Rzeczycka M

• Warsaw University, Miecznikowa 1, 02-096 Warsaw, Poland

autor

Blaszczyk M.

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