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Chemical oxidation of fish canning wastewater by Fenton's reagent
Cristovão, Raquel; Botelho, Cidália; Martins, Ramiro; Boaventura, RuiThe fish canning industry generates large volumes of wastewater for which the treatment is particularly difficult due to the high content of organic matter and salts and to the significant amount of oil and grease they present. In this work, a closed jacketed batch reactor was used to study the feasibility of applying a Fenton reaction step after an activated sludge biological treatment. For this purpose and in...
Primary treatment optimization of a fish canning wastewater from a Portuguese p...
Cristovão, Raquel; Botelho, Cidália; Martins, Ramiro; Loureiro, José; Boaventura, RuiA sequence with three stages was optimized as a primary treatment for wastewaters from a fish canning industry of northern Portugal. Sedimentation tests were assessed at different times. The removal of a high fraction (75%) of oil and grease (O&G) and of some (48%) total suspended solids (TSS) occurred after a settling time of 1.5h. Coagulant dosage and pH value were optimized in the coagulation/flocculation tr...
Chemical oxidation of fish canning wastewater by fenton’s reagent
Cristovão, Raquel; Gonçalves, Cristiana; Botelho, Cidália; Martins, Ramiro; Boaventura, RuiThe fish canning industry generates large volume of wastewater for which the treatment is particularly difficult due to the high content of organic matter and salts and to the significant amount of oil and grease they present. In this work, a closed jacketed batch reactor was used to study the feasibility of applying a Fenton reaction step after an activated sludge biological treatment. For this purpose and in ...
Immobilization of commercial laccase on spent grain
Silva, Andreia Machado da; Tavares, Ana P. M.; Rocha, Cristina M. R.; Cristóvão, Raquel O.; Teixeira, J. A.; Macedo, Eugénia A.The aim of this work was to assess the possibility of using beer spent grain (a byproduct of beer’s brewing industry) as a carrier for laccase immobilization. Both adsorption (on spent grain – SG and on digested spent grain – DSG) and covalent binding (using glycidol and glycidol followed by ethylenediamine on DSG) were used. The effect of different immobilization conditions on the immobilization yields and rec...
Degradation of dye-containing textile effluents by enzymatic catalysis
Cristóvão, Raquel OliveiraTese de doutoramento. Engenharia Química. Faculdade de Engenharia. Universidade do Porto. 2010
Chemical and biological treatment of fish canning wastewaters
Cristovão, Raquel; Botelho, Cidália; Martins, Ramiro; Boaventura, Ruihe main environmental problems of fish canning industries are high water consumption and high organic matter, oil and grease and salt content in their wastewaters. This work aims to analyze the situation (water consumption, wastewater production, wastewater characterization, etc.) of different plants located north of Douro river, in Portugal, in order to propose various solutions to their problems. Thus, initia...
Pollution prevention and wastewater treatment in fish canning industries of Nor...
Cristovão, Raquel; Botelho, Cidália; Martins, Ramiro; Boaventura, RuiThe main environmental problems of fish canning industries are high water consumption and high organic matter, oil and grease and salt content in their wastewaters. This work aims to analyze the situation (water consumption, wastewater production, wastewater characterization, etc.) of different plants located north of Douro river, in Portugal, in order to propose various solutions to their problems. Thus, initi...
Pollution prevention and wastewater treatment in fish canning industries of Nor...
Cristovão, Raquel; Martins, Ramiro; Boaventura, RuiThe main environmental problems of fish canning industries are high water consumption and high organic matter, oil and grease and salt content in their wastewaters. This work aims to analyze the situation (water consumption, wastewater production, wastewater characterization, etc.) of different plants located north of Douro river, in Portugal, in order to propose various solutions to their problems. Thus, initi...
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