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Doctoral Thesis
DOI
https://doi.org/10.11606/T.18.2011.tde-23052012-094832
Document
Author
Full name
Gustavo Mockaitis
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2011
Supervisor
Committee
Zaiat, Marcelo (President)
Barana, Ana Claudia
Chernicharo, Carlos Augusto de Lemos
Kato, Mario Takayuki
Schmidell Netto, Willibaldo
Title in Portuguese
Remoção de 'CD POT.2+' e 'CU POT.2+' de águas residuárias utilizando biorreator anaeróbio contínuo de leito fixo ordenado
Keywords in Portuguese
Cádmio - remoção biológica
Cobre - remoção biológica
Leito fixo ordenado
Reatores anaeróbios
Abstract in Portuguese
O presente trabalho apresenta o biorreator anaeróbio contínuo de leito fixo ordenado como alternativa ao tratamento de efluentes contendo os íons 'CU POT.2+' e 'CD POT.2+', sendo que cada metal foi estudado isoladamente. O biorreator operou sempre com um tempo de detenção hidráulica de 12 à 15 horas, com uma água residuária sintética simulando o esgoto sanitário, na concentração de 500 mg '0 IND.2'/L (em termos de DQO), a uma temperatura de 30°C. Durante a fase na qual o biorreator operou com água residuária em condições metanogênicas o biorreator foi alimentado, em condições distintas, com concentrações crescentes de 'CU POT.2+' e 'CD POT.2+'. O acúmulo dos metais na matriz de imobilização levou ao bioreator apresentar instabilidade na operação, sendo determinadas as concentrações críticas para o 'CU POT.2+' (50,8 mg 'CU POT.2+'/L) e para o 'CD POT.2+' (29,8 mg 'CD POT.2+'/L). Durante a operação nas condições metanogênicas foi observado o efeito tóxico pela diminuição na eficiência de remoção de matéria orgânica, mas sem perder a estabilidade operacional até que as concentrações críticas foram atingidas. A partir dos valores das concentrações críticas, o biorreator foi operado em condições sulfetogênicas em duas relações DQO/['SO IND.4'POT.2-'] distintas (0,68 e 1,99 para o uma concentração média de 36 mg 'CU POT.2+'/L; e 0,69 e 8,02 para uma concentração média de 27 mg 'CD POT.2+'/L). Nas operações em condições sulfetogênicas, o biorreator operou de maneira estável, no entanto, não foi capaz de remover todo o metal alimentado.
Title in English
Wastewater 'CD POT.2+' and 'CU POT.2+' removal using a continuous Anaerobic Bioreactor with Fixed-Structured Bed
Keywords in English
Anaerobic bioreactors
Cadmium - biological removal
Copper - biological removal
Fixed-structured bed
Abstract in English
This work presents the anaerobic continuous bioreactor with fixed-structured bed as a viable configuration of treatment of wastewater containing 'CU POT.2+' and 'CD POT.2+' ions. Each metallic ion were studied separately. The bioreactor was operated with 12 to 15 hours of hydraulic retention time, with a synthetic wastewater simulating domestic sewage (500 mg '0 IND.2'/L, in COD terms), at 30°C. In methanogenic conditions, the bioreactor was fed with crescent amount of 'CU POT.2+' and 'CD POT.2+'. The metal accumulation in the irnrnobilization matrix caused instability on bioreactor when achieving the critical concentrations for 'CU POT.2+' (50,8 mg 'CU POT.2+'/L) and for 'CD POT.2+' (29,8 mg 'CD POT.2+'/L). Also it was observed that this crescent metal concentration affected the efficiency of bioreactor in removing organic matter, although without operational instability until the system reach these critical metal concentrations. The bioreactor was operated in sulfidogenic conditions fed with a wastewater containing 'CU POT.2+' and 'CD POT.2+' at critical concentrations considering two different COD/['SO IND.4'POT.2-'] (0,68 and 1,99 for a mean influent 'CU POT.2+' concentration of 36 mg 'CU POT.2+'/L; and 0,69 and 8,02 para for a mean influent 'CD POT.2+' concentration of 27 mg 'CD POT.2+'/L). During the sulfidogenic conditions operations the bioreactor operated showing stability, however the system was not able to achieve the maximum efficiency in metal removal.
 
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Mockaitis_2011.pdf (7.97 Mbytes)
Publishing Date
2012-07-20
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • MOCKAITIS, G., et al. Toxic effects of cadmium (Cd2+) on anaerobic biomass : Kinetic and metabolic implications [doi:10.1016/j.jenvman.2012.03.056]. Journal of Environmental Management [online], 2012, vol. 106, p. 75-84.
  • ROSETO CAMILOTTI, Priscila, et al. Innovative anaerobic bioreactor with fixed-structured bed (ABFSB) for silmultaneous sulfate reduction and organic matter removal. Journal of Chemical Technology & Biotechnology, 2013.
  • MOCKAITIS, Gustavo, et al. Anaerobic bioreactor with a fixed-structured bed (ABFSB) for complex and sulphate-rich wastewater processing. In Proceedings of 13th World Congress on Anaerobic Digestion [DVD-ROM], 13, Santiago de Compostela, 2013. Valliadolid : Univercidad de Valliadolid, 2013. Publicado em meio digital (pen-drive) - Código do artigo IWA-10807ISBN 978-84-695-7756-1. ISBN 9788469577.
  • MOCKAITIS, Gustavo, et al. Continuous anaerobic bioreactor with fixed-structured bed (ABFSB) for wastewater treatment. In Anais do X DAAL [online], 10, Ouro Preto, 2011. Ouro Preto : UFMG, 2011. Trabalho disponível somente online no site da DESA/UFMG.. [cited 2012-07-16]. Available from : <http://www.desa.ufmg.br/daal2011/anais/pdf/4FJW.pdf>
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