Encontrados 7 documentos, a visualizar página 1 de 1
UV/TiO2 photocatalytic degradation of xanthene dyes
Pereira, Luciana; Pereira, Raquel; Oliveira, Catarina S.; Apostol, Laura; Gavrilescu, M.; Pons, M. N.; Zahraa, O.; Alves, M. M.UV/titanium dioxide (TiO2) degradation of two xanthene dyes, erythrosine B (Ery) and eosin Y (Eos), was studied in a photocatalytic reactor. Photocatalysis was able to degrade 98% of Ery and 73% of Eos and led to 65% of chemical oxygen demand removal. Experiments in buffered solutions at different initial pH values reveal the pH dependence of the process, with better results obtained under acidic conditions due...
Kinetic and stoichiometric characterization of a fixed biofilm reactor by pulse...
Ordaz, Alberto; Oliveira, Catarina S.; Quijano, Guilhermo; Ferreira, E. C.; Alves, M. M.; Thalasso, FrédéricAn in situ respirometric technique was applied to a sequential biofilm batch reactor treating a synthetic wastewater containing acetate. In this reactor, inoculated with mixed liquor from a wastewater plant, unglazed ceramic tiles were used as support media while maintaining complete mixing regime. A total of 8 kinetic and stoichiometric parameters were determined by pulse respirometry, namely substrate oxidati...
Respirometric techniques applied to aerobic microbial processes
Oliveira, Catarina S.Tese de doutoramento em Chemical and Biological Engineering ; erobic microbial processes are extremely important in environmental biotechnology, namely in biological wastewater treatment where activated sludge process represents nowadays the most widespread technology for wastewater purification. The availability of reliable, cheap and versatile real-time monitoring tools providing information on the biologica...
In situ pulse respirometric methods for the estimation of kinetic and stoichiom...
Oliveira, Catarina S.; Ordaz, Alberto; Ferreira, E. C.; Alves, M. M.; Thalasso, FrédéricIn situ pulse respirometry was applied in an activated sludge bubble column treating synthetic wastewater for the estimation of the (i) maximum specific oxygen consumption rate, (ii) substrate affinity constant, (iii) biomass growth yield, (iv) maintenance coefficient, and (v) specific endogenous respiration rate. Parameters obtained through respirometry were compared to those obtained by the chemostat method, ...
Assessment of the aerobic granulation process through quantitative image analysis
Oliveira, Catarina S.; Thalasso, Frédéric; Alves, M. M.Este resumo faz parte de: Book of abstracts of the Meeting of the Institute for Biotechnology and Bioengineering, 2, Braga, Portugal, 2010. A versão completa do livro de atas está disponível em: http://hdl.handle.net/1822/10968
Determination of kinetic and stoichiometric parameters of pseudomonas putida F1...
Oliveira, Catarina S.; Ordaz, Alberto; Alba, Joel; Alves, M. M.; Ferreira, E. C.; Thalasso, FrédéricThe applicability of pulse respirometry, for the estimation of kinetic and stoichiometric parameters in pure cultures was evaluated by comparison with traditional chemostat method. Pseudomonas putida F1 was cultured in a continuous stirred tank reactor, using glucose as sole carbon source. The reactor was operated under steady-state with six dilution rates, ranging from 0.06 to 0.35 h-1. Substrate and biomass c...
Kinetic and stoichiometric parameters estimation in a nitrifying bubble column ...
Ordaz, Alberto; Oliveira, Catarina S.; Aguilar, Ricardo; Carrión, Manuel; Ferreira, E. C.; Alves, M. M.; Thalasso, FrédéricThis article proposes a simple "in-situ" pulse respirometric method for the estimation of four important kinetic and stoichiometric parameters. The method is validated in a suspended biomass nitrifying reactor for the determination of (i) maximum oxygen uptake rate (OURexmax), (ii) oxidation yield (fE), (iii) biomass growth yield (fS), and (iv) affinity constant (KS). OURexmax and fE were directly obtained from...
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