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Master's Dissertation
DOI
10.11606/D.18.2018.tde-13072018-082510
Document
Author
Full name
Eduardo Freitas Moraes de Camargo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2000
Supervisor
Committee
Zaiat, Marcelo (President)
Campos, José Roberto
Hokka, Carlos Osamu
Title in Portuguese
Tratamento anaeróbio de águas residuárias, em batelada, com microrganismos imobilizados e circulação da fase aquosa
Keywords in Portuguese
Biomassa imobilizada
Espuma de poliuretano
Processo anaeróbio
Recirculação da fase aquosa
Tratamento de águas residuárias
Velocidade superficial
Abstract in Portuguese
O presente trabalho constou da concepção de um reator anaeróbio em regime de batelada com circulação da fase aquosa contendo biomassa imobilizada em espuma de poliuretano. O reator foi operado em ciclos de 8 h e mantido a 30 ± 1ºC tratando água residuária sintética elaborada à base de glicose, com concentração de aproximadamente 500 mgDQO/L. O estudo hidrodinâmico realizado com velocidade superficial de recirculação entre 0,16 e 0,80 cm/s indicou que o tempo de mistura obtido em todas as condições pode ser considerado desprezível quando comparado ao tempo total do ciclo, e também permitiu considerar o comportamento do escoamento no leito como o de um reator pistonado. O desempenho do reator no tratamento da água residuária foi avaliado para a condição sem circulação e também para velocidades superficiais de recirculação entre 0,03 e 0,30 cm/s. Os resultados obtidos indicaram que o reator apresentou desempenho satisfatório e boa estabilidade, apresentando eficiências de até 96% de remoção da matéria orgânica. O aumento da velocidade superficial de recirculação diminuiu a resistência a transferência de massa na fase líquida, ocasionando um aumento de 115% na velocidade global de reação, estimada através do ajuste dos valores experimentais da concentração de substrato ao modelo de primeira ordem.
Title in English
Anaerobic batch wastewater treatment with immobilized biomass and external circulation of the liquid phase
Keywords in English
Anaerobic process
Immobilized biomass
Liquid phase external circulation
Polyurethane foam
Superficial velocity
Wastewater treatment
Abstract in English
A new configuration of an anaerobic bioreactor with external circulation of the liquid phase wherein the biomass was immobilized on a polyurethane foam matrix is proposed. 8-hours cycles were cartied out at a temperature of 30 ± 1°C treating glucose synthetic wastewater at a concentration around 500 mg/L. A hydrodynamic study performed at 0.16 to 0.80 cm/s showed that the obtained mixture time is insignificant compared to the total cycles time, and the flow through the polyurethane foam bed can be represented by a plug flow. The reactor's performance assessed without circulation and with circulating liquid superficial velocity between 0.03 and 0.30 cm/s. The reactor attained operating stability and a COD removal efficiency of 96% was achieved. The increase in the liquid superficial velocity decreases the liquid resistance mass transfer, resulting in an increase of 115% in the global reaction velocity, estimated through the fit of a first model equation on the substrate concentration experimental values.
 
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Publishing Date
2018-07-13
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • CAMARGO, E F M, et al. Hydrodynamic Analysis of an Anaerobic Sequencing Batch Biofilm Reactor with Liquid-Phase External Circulation. Interciencia (Caracas), 2005, vol. 30, nº 4, p. 188-194.
  • CAMARGO, E F M, et al. Treatment of Low-Strength Wastewater Using Immobilized Biomass in a Sequencing Batch External Loop Reactor: Influence of the Medium Superficial Velocity on the Stability and Performance [doi:10.1590/S0104-66322002000300001]. Brazilian Journal of Chemical Engineering [online], 2002, vol. 19, nº 3, p. 267-275.
  • CAMARGO, E F M, et al. Hydrodynamic Analysis of an Anaerobic Sequencing Batch Biofilm Reactor with Liquid-Phase Mass Transfer Improved by External Circulation for Synthetic Wastewater Treatment. In Anaerobic Digestion 2004, Montreal, 2004. Proceedings of the Anaerobic Digestion 2004., 2004.
  • CAMARGO, E F M, et al. Influence of the Liquid Superficial Velocity on the Performance of an Anaerobic Sequencing Batch Reactor Containing Immobilized Biomass. In 9th World Congress Anaereobic Digestion, Antuérpia, 2001. Proceedings of the 9th World Congress Anaereobic Digestion - Anaerobic Digestion for Sustainability., 2001.
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