Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil
The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxy...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2008-02-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019 |
| _version_ | 1811293452292325376 |
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| author | Isaac Rodrigues Santos Ronaldo Cataldo Costa Ubiratan Freitas Gilberto Fillmann |
| author_facet | Isaac Rodrigues Santos Ronaldo Cataldo Costa Ubiratan Freitas Gilberto Fillmann |
| author_sort | Isaac Rodrigues Santos |
| collection | DOAJ |
| description | The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly increased downstream due to the high ammonium input. The mixing zone of the nitrogen-rich waters from Vieira creek with the phosphorus-enriched waters from Patos lagoon estuary was considered under high risk of eutrophication. The results could be useful for planning and management of WWTP-effluent receiving waters in temperate regions from developing countries.<br>A hipótese de que efluentes urbanos tratados através de um sistema de lodo ativado causam alterações na qualidade de água de ambientes aquáticos foi investigada no Arroio Vieira, Rio Grande, RS. Amostras de água foram coletadas a montante e a jusante dos emissários de uma estação de tratamento de esgoto (ETE). Oxigênio, material em suspensão e pH não variaram espacialmente. Já os valores para os nutrientes e para a demanda bioquímica do oxigênio foram significativamente maiores a jusante dos efluentes. Mais a jusante, as concentrações de nitrato aumentam devido à nitrificação do nitrogênio amoniacal, remineralização da matéria orgânica e/ou ocorrência de outros aportes não-identificados. A emissão de nutrientes per capita após o tratamento dos efluentes domésticos (0.16 kg P ano-1 e 4.14 kg N ano-1) é elevada. O aporte dos efluentes da ETE causa uma alteração acentuada das razões N:P, sendo os valores maiores a jusante da ETE devido ao aporte preferencial de nitrogênio amoniacal. Os resultados indicam que no local onde as águas do Arroio Vieira, enriquecidas em nitrogênio se misturam com as águas do estuário da Lagoa dos Patos, enriquecidas em fósforo, há grande risco de eutrofização. Os resultados são úteis para o planejamento e gerenciamento de águas receptoras de efluentes em regiões temperadas de paises em desenvolvimento. |
| first_indexed | 2024-04-13T05:01:37Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-04-13T05:01:37Z |
| publishDate | 2008-02-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-4a52d793191a4906b9274e30bbb7f4532022-12-22T03:01:19ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242008-02-0151115316210.1590/S1516-89132008000100019Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern BrazilIsaac Rodrigues SantosRonaldo Cataldo CostaUbiratan FreitasGilberto FillmannThe hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly increased downstream due to the high ammonium input. The mixing zone of the nitrogen-rich waters from Vieira creek with the phosphorus-enriched waters from Patos lagoon estuary was considered under high risk of eutrophication. The results could be useful for planning and management of WWTP-effluent receiving waters in temperate regions from developing countries.<br>A hipótese de que efluentes urbanos tratados através de um sistema de lodo ativado causam alterações na qualidade de água de ambientes aquáticos foi investigada no Arroio Vieira, Rio Grande, RS. Amostras de água foram coletadas a montante e a jusante dos emissários de uma estação de tratamento de esgoto (ETE). Oxigênio, material em suspensão e pH não variaram espacialmente. Já os valores para os nutrientes e para a demanda bioquímica do oxigênio foram significativamente maiores a jusante dos efluentes. Mais a jusante, as concentrações de nitrato aumentam devido à nitrificação do nitrogênio amoniacal, remineralização da matéria orgânica e/ou ocorrência de outros aportes não-identificados. A emissão de nutrientes per capita após o tratamento dos efluentes domésticos (0.16 kg P ano-1 e 4.14 kg N ano-1) é elevada. O aporte dos efluentes da ETE causa uma alteração acentuada das razões N:P, sendo os valores maiores a jusante da ETE devido ao aporte preferencial de nitrogênio amoniacal. Os resultados indicam que no local onde as águas do Arroio Vieira, enriquecidas em nitrogênio se misturam com as águas do estuário da Lagoa dos Patos, enriquecidas em fósforo, há grande risco de eutrofização. Os resultados são úteis para o planejamento e gerenciamento de águas receptoras de efluentes em regiões temperadas de paises em desenvolvimento.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019Activated sludgenutrientscontaminationcoastal zonebiogeochemistryeutrophication |
| spellingShingle | Isaac Rodrigues Santos Ronaldo Cataldo Costa Ubiratan Freitas Gilberto Fillmann Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil Brazilian Archives of Biology and Technology Activated sludge nutrients contamination coastal zone biogeochemistry eutrophication |
| title | Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil |
| title_full | Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil |
| title_fullStr | Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil |
| title_full_unstemmed | Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil |
| title_short | Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil |
| title_sort | influence of effluents from a wastewater treatment plant on nutrient distribution in a coastal creek from southern brazil |
| topic | Activated sludge nutrients contamination coastal zone biogeochemistry eutrophication |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019 |
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