jorge rubio - Academia.edu (original) (raw)

Papers by jorge rubio

Research paper thumbnail of Primary treatment of a soybean protein bearing effluent by dissolved air flotation and by sedimentation

Water Research, 1995

The present paper reports on work performed on the recovery of proteins suspended in the effluent... more The present paper reports on work performed on the recovery of proteins suspended in the effluent of a soybean protein plant. The work involved studies of effluent characterization, protein suspension destabilization, dissolved air flotation (DAF) and gravity settling. The flotation and settling tests were performed both at a batch bench scale and at a continuous plant scale in the actual industrial operation. The soybean proteins, present as a colloidal suspension in the effluent, are dispersed by combined electrostatic repulsion and steric stabilization mechanisms. The destabilization and aggregation of the proteins into high quality flocs were achieved by addition of 200-300 mg/l FeC13, setting the pH at the isoelectric point of the proteins (pH 4.5) and an anionic polyacrylamide polymer (high molecular weight) dosage of 2-3 mg/l. The bench scale tests indicated under these conditions that a solid-liquid separation can be made by both DAF and gravity settling with DAF giving superior results. However, in the industrial plant tests, gravity settling proved generally to give better separation efficiencies. In plant operation the DAF process worked well only if the flocs were sufficiently hydrophobic and resistant to mechanical degradation, which was not always true in the actual operation. The settling process was much less sensitive to feed stock variations.

Research paper thumbnail of Dissolved air flotation (DAF) performance at low saturation pressures

Filtration & Separation, 1999

Research paper thumbnail of Removal of Hg, As and Se ions from gold cyanide leach solutions by dissolved air flotation

Minerals Engineering, 1998

The removal of Hg, As and Se ions from processing streams of gold cyanidation circuits was studie... more The removal of Hg, As and Se ions from processing streams of gold cyanidation circuits was studied by dissolved air flotation (DAF) at laboratory scale. Two different methods were applied. The first was based on the separation by flotation of the aggregates (AF) formed between the ions and NaDTC (precipitant), LaCl3 or FeCl3 (coagulants) and Bufloc (a flocculant). The second

Research paper thumbnail of Eichhornia crassipes as biosorbent for heavy metal ions

Minerals Engineering, 1995

... Wolverton, BC McDonald, RC, The Water Hyacinth: From Prolific Pest to Potential Provider, Amb... more ... Wolverton, BC McDonald, RC, The Water Hyacinth: From Prolific Pest to Potential Provider, Ambio, 8, 29 (1979). Blake, G., Kaigate, B., Fourcy, A. Boutin, C, Incorporation of Cadmium by Water Hyacinth, Water Science Technology, 19, 123128 (1987). ...

Research paper thumbnail of Advances in the adsorptive particulate flotation process

International Journal of Mineral Processing, 2004

The removal of contaminants from liquid effluents by the adsorptive particulate flotation (APF) p... more The removal of contaminants from liquid effluents by the adsorptive particulate flotation (APF) process, including new adsorbents and flotation devices, are reported. Herein, contaminants are adsorbed (and/or absorbed) onto the surface of a particulate carrier and both are separated attached to rising bubbles. The adsorbents were coal, charcoal, coal beneficiation tailings, modified Brazilian smectites and barite. Emulsified oils in water, dyes and metal ions present in synthetic and industrial effluents were successfully removed using various carrier and DAF, induced air flotation, IAF or jet flotation for the separation of the loaded carrier. Process efficiency was found to be a function of the carrier/contaminant mass ratio, size distribution of the carrier and system hydrodynamics. Results and mechanisms involved are discussed in terms of adsorption and flotation phenomena. D

Research paper thumbnail of Sorption of heavy metal ions by the nonliving biomass of freshwater macrophytes

Environmental Science & Technology, 1999

... Results showed that the dried biomass of Potamogeton lucens, Salvinia herzogii, and Eichhorni... more ... Results showed that the dried biomass of Potamogeton lucens, Salvinia herzogii, and Eichhornia crassipes were excellent biosorbents for Cr(III ... Advantages and disadvantages found in the use of these natural adsorbents for heavy metals ions present in industrial wastewaters ...

Research paper thumbnail of Removal of heavy metal ions by adsorptive particulate flotation

Minerals Engineering, 1997

The removal of Zn, Cu and Ni ions, from diluted solutions, by the adsorptive particulate flotatio... more The removal of Zn, Cu and Ni ions, from diluted solutions, by the adsorptive particulate flotation (APF) process, was studied at laboratory scale. Zeolite (Chabazite) fines, in small concentrations, were used as the particulate sorbing for the metal ions and dissolved air flotation was employed for the solid/liquid separation of the loaded "carrier % Results showed almost complete removal (>98 %) of the heavy metal ions using Fe(OH) 3 precipitates to "aggregate" the carrier (coprecipitation). The process efficient: depended on solution and interfacial chemistry and aggregation effectiveness. The potential of APF in the field of effluent treatment is discussed. © 1997 Published by

Research paper thumbnail of Style recognition through statistical event models

Journal of New Music Research, 2005

Research paper thumbnail of Primary treatment of a soybean protein bearing effluent by dissolved air flotation and by sedimentation

Water Research, 1995

The present paper reports on work performed on the recovery of proteins suspended in the effluent... more The present paper reports on work performed on the recovery of proteins suspended in the effluent of a soybean protein plant. The work involved studies of effluent characterization, protein suspension destabilization, dissolved air flotation (DAF) and gravity settling. The flotation and settling tests were performed both at a batch bench scale and at a continuous plant scale in the actual industrial operation. The soybean proteins, present as a colloidal suspension in the effluent, are dispersed by combined electrostatic repulsion and steric stabilization mechanisms. The destabilization and aggregation of the proteins into high quality flocs were achieved by addition of 200-300 mg/l FeC13, setting the pH at the isoelectric point of the proteins (pH 4.5) and an anionic polyacrylamide polymer (high molecular weight) dosage of 2-3 mg/l. The bench scale tests indicated under these conditions that a solid-liquid separation can be made by both DAF and gravity settling with DAF giving superior results. However, in the industrial plant tests, gravity settling proved generally to give better separation efficiencies. In plant operation the DAF process worked well only if the flocs were sufficiently hydrophobic and resistant to mechanical degradation, which was not always true in the actual operation. The settling process was much less sensitive to feed stock variations.

Research paper thumbnail of Dissolved air flotation (DAF) performance at low saturation pressures

Filtration & Separation, 1999

Research paper thumbnail of Removal of Hg, As and Se ions from gold cyanide leach solutions by dissolved air flotation

Minerals Engineering, 1998

The removal of Hg, As and Se ions from processing streams of gold cyanidation circuits was studie... more The removal of Hg, As and Se ions from processing streams of gold cyanidation circuits was studied by dissolved air flotation (DAF) at laboratory scale. Two different methods were applied. The first was based on the separation by flotation of the aggregates (AF) formed between the ions and NaDTC (precipitant), LaCl3 or FeCl3 (coagulants) and Bufloc (a flocculant). The second

Research paper thumbnail of Eichhornia crassipes as biosorbent for heavy metal ions

Minerals Engineering, 1995

... Wolverton, BC McDonald, RC, The Water Hyacinth: From Prolific Pest to Potential Provider, Amb... more ... Wolverton, BC McDonald, RC, The Water Hyacinth: From Prolific Pest to Potential Provider, Ambio, 8, 29 (1979). Blake, G., Kaigate, B., Fourcy, A. Boutin, C, Incorporation of Cadmium by Water Hyacinth, Water Science Technology, 19, 123128 (1987). ...

Research paper thumbnail of Advances in the adsorptive particulate flotation process

International Journal of Mineral Processing, 2004

The removal of contaminants from liquid effluents by the adsorptive particulate flotation (APF) p... more The removal of contaminants from liquid effluents by the adsorptive particulate flotation (APF) process, including new adsorbents and flotation devices, are reported. Herein, contaminants are adsorbed (and/or absorbed) onto the surface of a particulate carrier and both are separated attached to rising bubbles. The adsorbents were coal, charcoal, coal beneficiation tailings, modified Brazilian smectites and barite. Emulsified oils in water, dyes and metal ions present in synthetic and industrial effluents were successfully removed using various carrier and DAF, induced air flotation, IAF or jet flotation for the separation of the loaded carrier. Process efficiency was found to be a function of the carrier/contaminant mass ratio, size distribution of the carrier and system hydrodynamics. Results and mechanisms involved are discussed in terms of adsorption and flotation phenomena. D

Research paper thumbnail of Sorption of heavy metal ions by the nonliving biomass of freshwater macrophytes

Environmental Science & Technology, 1999

... Results showed that the dried biomass of Potamogeton lucens, Salvinia herzogii, and Eichhorni... more ... Results showed that the dried biomass of Potamogeton lucens, Salvinia herzogii, and Eichhornia crassipes were excellent biosorbents for Cr(III ... Advantages and disadvantages found in the use of these natural adsorbents for heavy metals ions present in industrial wastewaters ...

Research paper thumbnail of Removal of heavy metal ions by adsorptive particulate flotation

Minerals Engineering, 1997

The removal of Zn, Cu and Ni ions, from diluted solutions, by the adsorptive particulate flotatio... more The removal of Zn, Cu and Ni ions, from diluted solutions, by the adsorptive particulate flotation (APF) process, was studied at laboratory scale. Zeolite (Chabazite) fines, in small concentrations, were used as the particulate sorbing for the metal ions and dissolved air flotation was employed for the solid/liquid separation of the loaded "carrier % Results showed almost complete removal (>98 %) of the heavy metal ions using Fe(OH) 3 precipitates to "aggregate" the carrier (coprecipitation). The process efficient: depended on solution and interfacial chemistry and aggregation effectiveness. The potential of APF in the field of effluent treatment is discussed. © 1997 Published by

Research paper thumbnail of Style recognition through statistical event models

Journal of New Music Research, 2005