Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário
Autor(a) principal: | |
---|---|
Data de Publicação: | 2012 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://locus.ufv.br/handle/123456789/3775 |
Resumo: | Sanitary landfill leachate has high, potentially toxic organic and nutrient loads that may cause negative impacts during combined biological treatment with sewage. In this study, the effect of intermittent leachate addition at the inlet of the activated sludge municipal sewage treatment plant in Juiz de Fora, Minas Gerais, located in southeastern Brazil, was evaluated. Raw sewage, leachate, mixed leachate-sewage and treated wastewater samples were collected monthly over six months for physicochemical characterization (organic matter, solids, nutrients, metals) and determination of acute toxicity to Daphnia similis. Return activated sludge was also collected and used to quantify specific oxygen uptake rate (SOUR) and biomass growth in sewage and leachate-sewage mixtures in the laboratory. Leachate presented higher values than sewage for all parameters measured, except phosphorous, though its composition varied widely. Activated sludge treatment efficiently removed organic matter and nutrients, despite the high intermittent loads associated with leachate added at the treatment plant inlet. The only parameters that regularly surpassed Minas Gerais state discharge limits were Hg and Pb. Contrary to the raw sewage that did not exhibit toxicity, all samples of leachate were acutely toxic to D. similis and this led to toxicity in four of the mixed leachate-sewage samples, while only one sample of treated wastewater exhibited slight toxicity. Leachate toxicity correlated positively with pH, nitrogen and conductivity. Potentiation of the toxic effect was observed in leachate-sewage mixtures prepared in the laboratory. SOUR values and sludge production increased in mixtures of 20% leachate-80% sewage over their values in sewage alone. SOUR values correlated negatively with As, Cd, Hg and Pb. The results suggest that activated sludge can adapt to the increased organic and nutrient load associated with landfill leachate over time, but the effect of the impulse loads that enter with leachate should be investigated further. |
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Magalhães, Déborah Neide dehttp://lattes.cnpq.br/7917770915386697Azevedo, Mônica de Abreuhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4782410Z5Rezende, Ana Augusta Passoshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786153D5Mounteer, Ann Honorhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723208Y4Povinelli, Jurandyrhttp://lattes.cnpq.br/79567033839415002015-03-26T13:28:08Z2012-08-202015-03-26T13:28:08Z2012-02-15MAGALHÃES, Déborah Neide de. Toxicity in co-treatment of sanitary sewage and landfill leachate. 2012. 41 f. Dissertação (Mestrado em Geotecnia; Saneamento ambiental) - Universidade Federal de Viçosa, Viçosa, 2012.http://locus.ufv.br/handle/123456789/3775Sanitary landfill leachate has high, potentially toxic organic and nutrient loads that may cause negative impacts during combined biological treatment with sewage. In this study, the effect of intermittent leachate addition at the inlet of the activated sludge municipal sewage treatment plant in Juiz de Fora, Minas Gerais, located in southeastern Brazil, was evaluated. Raw sewage, leachate, mixed leachate-sewage and treated wastewater samples were collected monthly over six months for physicochemical characterization (organic matter, solids, nutrients, metals) and determination of acute toxicity to Daphnia similis. Return activated sludge was also collected and used to quantify specific oxygen uptake rate (SOUR) and biomass growth in sewage and leachate-sewage mixtures in the laboratory. Leachate presented higher values than sewage for all parameters measured, except phosphorous, though its composition varied widely. Activated sludge treatment efficiently removed organic matter and nutrients, despite the high intermittent loads associated with leachate added at the treatment plant inlet. The only parameters that regularly surpassed Minas Gerais state discharge limits were Hg and Pb. Contrary to the raw sewage that did not exhibit toxicity, all samples of leachate were acutely toxic to D. similis and this led to toxicity in four of the mixed leachate-sewage samples, while only one sample of treated wastewater exhibited slight toxicity. Leachate toxicity correlated positively with pH, nitrogen and conductivity. Potentiation of the toxic effect was observed in leachate-sewage mixtures prepared in the laboratory. SOUR values and sludge production increased in mixtures of 20% leachate-80% sewage over their values in sewage alone. SOUR values correlated negatively with As, Cd, Hg and Pb. The results suggest that activated sludge can adapt to the increased organic and nutrient load associated with landfill leachate over time, but the effect of the impulse loads that enter with leachate should be investigated further.O lixiviado de aterro sanitário apresenta elevadas cargas orgânicas e de nutrientes potencialmente tóxicas, que podem causar impactos negativos durante o tratamento biológico combinado com esgoto. Nesta pesquisa foi avaliado o efeito da adição de lixiviado ao esgoto sanitário no cotratamento por lodos ativados em uma ETE no município de Juiz de Fora, sudeste do Brasil. Esgoto bruto, lixiviado, mistura esgoto-lixiviado afluente na ETE e efluente secundário foram coletados mensalmente, durante 6 meses, caracterizados físico-quimicamente (matéria orgânica, sólidos, nutrientes e metais) e avaliadas quanto à toxicidade aguda à Daphnia similis. Lodo da linha de reciclo foi coletado para a quantificação da taxa específica de consumo de oxigênio (SOUR) e de crescimento de biomassa do lodo no esgoto bruto e em misturas esgoto-lixiviado preparadas em bancada. Os resultados evidenciaram a grande variabilidade na composição do lixiviado, o qual apresentou valores mais elevados em todas as variáveis analisadas, exceto o fósforo. Apesar da elevada carga orgânica adicionada de forma intermitente no sistema, o tratamento por lodos ativados parece remover de forma eficiente a matéria orgânica e nutrientes e produz um efluente secundário com baixas concentrações de DQO e N orgânico. O efluente secundário apresentou concentrações de Hg e Pb acima dos limites estabelecidos para lançamento em corpos d água no estado de Minas Gerais. Ao contrário do esgoto bruto, todas as amostras de lixiviado foram tóxicas à D. similis, o que conferiu toxicidade à mistura afluente na ETE em algumas amostragens. Somente uma amostra de efluente secundário apresentou ligeira toxicidade. A toxicidade do lixiviado correlacionou-se positivamente com o pH, nitrogênio e condutividade. Testes de toxicidade em misturas preparadas em bancada evidenciaram o efeito de potencialização da toxicidade do lixiviado. Há uma tendência do aumento da SOUR com o aumento da proporção de lixiviado na mistura e os valores de SOUR correlacionaram-se negativamente com As, Cd, Hg e Pb. Os resultados sugerem que os lodos ativados podem se adaptar a misturas com maiores concentrações de lixiviado ao longo do tempo, mas o efeito de altas cargas na entrada do sistema deve ser investigado futuramente.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de ViçosaMestrado em Engenharia CivilUFVBRGeotecnia; Saneamento ambientalLodos ativadosTratamento combinadoDaphnia similisMetais-traçoNitrogênioRespirometriaActivated sludgeCombined treatmentDaphnia similisTrace metalsNitrogenRespirometryCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIASToxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitárioToxicity in co-treatment of sanitary sewage and landfill leachateinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf240547https://locus.ufv.br//bitstream/123456789/3775/1/texto%20completo.pdf20321868b10a192937153ede468b05e2MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain63260https://locus.ufv.br//bitstream/123456789/3775/2/texto%20completo.pdf.txtd0e8959c377b3e6704305af64f558072MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3513https://locus.ufv.br//bitstream/123456789/3775/3/texto%20completo.pdf.jpge3693697dc1ccb45bb19c1564d25281aMD53123456789/37752016-04-09 23:16:03.169oai:locus.ufv.br:123456789/3775Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-10T02:16:03LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.por.fl_str_mv |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
dc.title.alternative.eng.fl_str_mv |
Toxicity in co-treatment of sanitary sewage and landfill leachate |
title |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
spellingShingle |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário Magalhães, Déborah Neide de Lodos ativados Tratamento combinado Daphnia similis Metais-traço Nitrogênio Respirometria Activated sludge Combined treatment Daphnia similis Trace metals Nitrogen Respirometry CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIAS |
title_short |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
title_full |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
title_fullStr |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
title_full_unstemmed |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
title_sort |
Toxicidade no cotratamento de esgoto sanitário e lixiviado de aterro sanitário |
author |
Magalhães, Déborah Neide de |
author_facet |
Magalhães, Déborah Neide de |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/7917770915386697 |
dc.contributor.author.fl_str_mv |
Magalhães, Déborah Neide de |
dc.contributor.advisor-co1.fl_str_mv |
Azevedo, Mônica de Abreu |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4782410Z5 |
dc.contributor.advisor-co2.fl_str_mv |
Rezende, Ana Augusta Passos |
dc.contributor.advisor-co2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786153D5 |
dc.contributor.advisor1.fl_str_mv |
Mounteer, Ann Honor |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723208Y4 |
dc.contributor.referee1.fl_str_mv |
Povinelli, Jurandyr |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/7956703383941500 |
contributor_str_mv |
Azevedo, Mônica de Abreu Rezende, Ana Augusta Passos Mounteer, Ann Honor Povinelli, Jurandyr |
dc.subject.por.fl_str_mv |
Lodos ativados Tratamento combinado Daphnia similis Metais-traço Nitrogênio Respirometria |
topic |
Lodos ativados Tratamento combinado Daphnia similis Metais-traço Nitrogênio Respirometria Activated sludge Combined treatment Daphnia similis Trace metals Nitrogen Respirometry CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIAS |
dc.subject.eng.fl_str_mv |
Activated sludge Combined treatment Daphnia similis Trace metals Nitrogen Respirometry |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::TRATAMENTO DE AGUAS DE ABASTECIMENTO E RESIDUARIAS |
description |
Sanitary landfill leachate has high, potentially toxic organic and nutrient loads that may cause negative impacts during combined biological treatment with sewage. In this study, the effect of intermittent leachate addition at the inlet of the activated sludge municipal sewage treatment plant in Juiz de Fora, Minas Gerais, located in southeastern Brazil, was evaluated. Raw sewage, leachate, mixed leachate-sewage and treated wastewater samples were collected monthly over six months for physicochemical characterization (organic matter, solids, nutrients, metals) and determination of acute toxicity to Daphnia similis. Return activated sludge was also collected and used to quantify specific oxygen uptake rate (SOUR) and biomass growth in sewage and leachate-sewage mixtures in the laboratory. Leachate presented higher values than sewage for all parameters measured, except phosphorous, though its composition varied widely. Activated sludge treatment efficiently removed organic matter and nutrients, despite the high intermittent loads associated with leachate added at the treatment plant inlet. The only parameters that regularly surpassed Minas Gerais state discharge limits were Hg and Pb. Contrary to the raw sewage that did not exhibit toxicity, all samples of leachate were acutely toxic to D. similis and this led to toxicity in four of the mixed leachate-sewage samples, while only one sample of treated wastewater exhibited slight toxicity. Leachate toxicity correlated positively with pH, nitrogen and conductivity. Potentiation of the toxic effect was observed in leachate-sewage mixtures prepared in the laboratory. SOUR values and sludge production increased in mixtures of 20% leachate-80% sewage over their values in sewage alone. SOUR values correlated negatively with As, Cd, Hg and Pb. The results suggest that activated sludge can adapt to the increased organic and nutrient load associated with landfill leachate over time, but the effect of the impulse loads that enter with leachate should be investigated further. |
publishDate |
2012 |
dc.date.available.fl_str_mv |
2012-08-20 2015-03-26T13:28:08Z |
dc.date.issued.fl_str_mv |
2012-02-15 |
dc.date.accessioned.fl_str_mv |
2015-03-26T13:28:08Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MAGALHÃES, Déborah Neide de. Toxicity in co-treatment of sanitary sewage and landfill leachate. 2012. 41 f. Dissertação (Mestrado em Geotecnia; Saneamento ambiental) - Universidade Federal de Viçosa, Viçosa, 2012. |
dc.identifier.uri.fl_str_mv |
http://locus.ufv.br/handle/123456789/3775 |
identifier_str_mv |
MAGALHÃES, Déborah Neide de. Toxicity in co-treatment of sanitary sewage and landfill leachate. 2012. 41 f. Dissertação (Mestrado em Geotecnia; Saneamento ambiental) - Universidade Federal de Viçosa, Viçosa, 2012. |
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http://locus.ufv.br/handle/123456789/3775 |
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por |
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Universidade Federal de Viçosa |
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Mestrado em Engenharia Civil |
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UFV |
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BR |
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Geotecnia; Saneamento ambiental |
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Universidade Federal de Viçosa |
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