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Intensification of the anaerobic microbiological degradation of sewage sludge under bio-sulfidogenic conditions

Plyatsuk L., Chernish E.

Environment Protection Engineering

2013

Vol. 39, nr 3

101--118

Possibility of using phosphogypsum as a mineral substrate for the sewage sludge treatment in bio-sulfidogenic conditions has been investigated. Anaerobic microbiological degradation (AMD) on way of sulfidogenesis was used to produce biogenic hydrogen sulfide. The ozonation of the sludge prior to the AMD under bio-sulfidogenic conditions led to higher efficiencies of hydrogen sulfide production and organic matter removal. After 20 days of digestion, the elimination of CODt and CODs varied between 78-84% and 83-87%, respectively, within advanced operation of anaerobic bioreactor. Technological applications of such system has been discussed.

Precipitation of heavy metals from industrial wastewater by Desulfovibrio desulfuricans

Kosińska K., Miśkiewicz T.

Environment Protection Engineering

2012

Vol. 38, nr 2

51--60

Wastewater from leather tanning, electroplating, organic dye production and non-ferrous metallurgy was treated in a batch anaerobic bioreactor of the total volume of 2.7 dm3 using Desulfovibrio desulfuricans for the removal of Crtotal, Cu(II), Fe(II), Ni(II) and Zn(II) as metal sulfides. Except the tannery effluent, the wastewater samples were supplemented with an appropriate quantity of swine manure in order to enrich them with simple organic compounds and biogenic elements (N and P), and thus upgrade the sulfate reducing activity of D. desulfuricans. The metal removal efficiencies obtained varied from 85.2% to 98.96%.