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Assessment of faecal pollution indicators (total coliforms, Escherichia coli, Enterococcus sp., sulphite reducing clostridia and Clostridium perfringens) was carried out in water samples collected during the XXIX Brazilian Antarctic Expedition and sediment samples from the XXX Brazilian Antarctic Expedition. Wastewater at di erent stages in the sewage treatment plant were also analyzed for ammonia, total phosphorus, phosphates, chemical oxygen demand (COD) and faecal indicators, in order to characterize the wastewater and evaluate the system performance. Water and sediment analysis showed low populations of faecal coliforms and the presence of the indicators in all sites, with higher frequencies and concentrations at EACF and Ullman Point sediment, indicating that a possible human impact is of low magnitude and cannot be di erentiated from interference caused by animal faeces. Assessment of the sewage treatment plant revealed that the wastewater produced at EACF has a typical faecal indicator composition and low contents of nutrients and COD, when compared to typical domestic sewage. Removal e ciency of COD was estimated in 20%, coliforms and enterococci removal varied from 84 to 98,7%, and no removal of nutrients was detected, indicating that the treatment process can be optimized.

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Assessment of Faecal Pollution Indicators in the Brazilian Antarctic Station Wastewater Treatment Plant and in Environmental Samples at Admiralty Bay, Antarctic Peninsula