Acta Botanica Croatica, Vol. 63 No. 2, 2004.
Izvorni znanstveni članak
Influence of sulphate addition on the performance of aerobic wastewater treatment system
J. Hrenović
Sažetak
The possibility of the wastewater treatment in an aerobic activated sludge system bioaugmented with a phosphate-accumulating bacteria Acinetobacter calcoaceticus was investigated. After establishing the system performance for the conventional and bioaugmented activated sludge, the experiments with the addition of sulphate in the form of ammonium sulphate solution (20 mg L–1) were conducted. By the bioaugmentation of the conventional activated sludge, phosphorus removal and system performance were improved. Sulphate addition in the bioaugmented activated sludge system resulted in a short inhibitory effect (4 h) on the removal of total phosphorus and orthophosphates. Sulphate addition did not influenced mixed liquor suspended solids, bacterial numbers of A. calcoaceticus and removal of the chemical oxygen demand in the system, but resulted in the
persistent decrease of the medium pH value and dissolved oxygen concentration after six days of feeding. The presented results are important from the practical aspect of the application in the performance of aerobic activated sludge wastewater treatment systems, where the inlet of the wastewater with an increased concentration of sulphate can lead to the disturbances of the system efficiency.
Ključne riječi
Acinetobacter calcoaceticus; aerobic treatment; phosphorus removal; sulphate acidification; wastewater
Hrčak ID:
3440
URI
Datum izdavanja:
15.10.2004.
Posjeta: 2.418 *