论文信息 - PHOSPHATE REMOVAL IN AN UASB REACTOR TREATING SYNTHETIC SUBSTRATE SIMULATING DOMESTIC SEWAGE

PHOSPHATE REMOVAL IN AN UASB REACTOR TREATING SYNTHETIC SUBSTRATE SIMULATING DOMESTIC SEWAGE

The removal of phosphate in an up-flow anaerobic sludge blanket (UASB) reactor treating a synthetic substrate simulating domestic sewage and its relation with the presence of FeCl3 in the influent was investigated. Phosphate removal efficiencies were 30%, 54% and 84% for influent FeCl3 concentrations of 90 mg.L-1 and 200 mg.L-1, respectively. Scanning eletronic microscopy of granular sludge samples taken from the reactor showed the presence of Methanothrix- like microorganisms as the main predominant methanogenic bacteria. Iron precipitates such as vivianite [Fe3(PO4)2 . 8 H2O] were identified in granular samples by x-ray defraction and energy dispersion x-ray (EDX) analyses

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