The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform

L E Macaskie - One of the best experts on this subject based on the ideXlab platform.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation
    Journal of Industrial Microbiology and Biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La^3+ from solution via precipitation of cell-bound LaPO_4. The effect of repeated aerobic–anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic–anaerobic cycling with aerobic carbon/energy limitation. Addition of La^3+ to the anaerobic Vessel during recycle mode promoted removal of 95% of the La^3+ from a 0.1 to 0.3 mM (14–42 ppm) solution at the expense of biogenic phosphate. Journal of Industrial Microbiology & Biotechnology (2001) 26, 333–340.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation.
    Journal of industrial microbiology & biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La(3+) from solution via precipitation of cell-bound LaPO(4). The effect of repeated aerobic-anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic-anaerobic cycling with aerobic carbon/energy limitation. Addition of La(3+) to the anaerobic Vessel during recycle mode promoted removal of 95% of the La(3+) from a 0.1 to 0.3 mM (14-42 ppm) solution at the expense of biogenic phosphate.

C D Boswell - One of the best experts on this subject based on the ideXlab platform.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation
    Journal of Industrial Microbiology and Biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La^3+ from solution via precipitation of cell-bound LaPO_4. The effect of repeated aerobic–anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic–anaerobic cycling with aerobic carbon/energy limitation. Addition of La^3+ to the anaerobic Vessel during recycle mode promoted removal of 95% of the La^3+ from a 0.1 to 0.3 mM (14–42 ppm) solution at the expense of biogenic phosphate. Journal of Industrial Microbiology & Biotechnology (2001) 26, 333–340.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation.
    Journal of industrial microbiology & biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La(3+) from solution via precipitation of cell-bound LaPO(4). The effect of repeated aerobic-anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic-anaerobic cycling with aerobic carbon/energy limitation. Addition of La(3+) to the anaerobic Vessel during recycle mode promoted removal of 95% of the La(3+) from a 0.1 to 0.3 mM (14-42 ppm) solution at the expense of biogenic phosphate.

R E Dick - One of the best experts on this subject based on the ideXlab platform.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation
    Journal of Industrial Microbiology and Biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La^3+ from solution via precipitation of cell-bound LaPO_4. The effect of repeated aerobic–anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic–anaerobic cycling with aerobic carbon/energy limitation. Addition of La^3+ to the anaerobic Vessel during recycle mode promoted removal of 95% of the La^3+ from a 0.1 to 0.3 mM (14–42 ppm) solution at the expense of biogenic phosphate. Journal of Industrial Microbiology & Biotechnology (2001) 26, 333–340.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation.
    Journal of industrial microbiology & biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La(3+) from solution via precipitation of cell-bound LaPO(4). The effect of repeated aerobic-anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic-anaerobic cycling with aerobic carbon/energy limitation. Addition of La(3+) to the anaerobic Vessel during recycle mode promoted removal of 95% of the La(3+) from a 0.1 to 0.3 mM (14-42 ppm) solution at the expense of biogenic phosphate.

H Eccles - One of the best experts on this subject based on the ideXlab platform.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation
    Journal of Industrial Microbiology and Biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La^3+ from solution via precipitation of cell-bound LaPO_4. The effect of repeated aerobic–anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic–anaerobic cycling with aerobic carbon/energy limitation. Addition of La^3+ to the anaerobic Vessel during recycle mode promoted removal of 95% of the La^3+ from a 0.1 to 0.3 mM (14–42 ppm) solution at the expense of biogenic phosphate. Journal of Industrial Microbiology & Biotechnology (2001) 26, 333–340.

  • Phosphate uptake and release by Acinetobacter johnsonii in continuous culture and coupling of phosphate release to heavy metal accumulation.
    Journal of industrial microbiology & biotechnology, 2001
    Co-Authors: C D Boswell, R E Dick, H Eccles, L E Macaskie
    Abstract:

    A strain of polyphosphate-synthesizing, phosphate-releasing Acinetobacter johnsonii was isolated from a wastewater treatment plant operating enhanced biological phosphate removal (EBPR) and was used to remove La(3+) from solution via precipitation of cell-bound LaPO(4). The effect of repeated aerobic-anaerobic cycles on the carbon and phosphate metabolism of the organism was studied in attempts to promote increased phosphate flux using a three-stage, continuous bioreactor comprising aerobic, anaerobic and Settling Vessels. The bioreactor was operated in two modes: In flow-through mode, cells were grown aerobically with acetate as the sole carbon source, promoting excess phosphate uptake (up to 5.0 mmol/l=3.0 mmol/g protein). Cells were diluted into the anaerobic Vessel where phosphate was released (up to 1.0 mmol/l=0.3 mmol/g protein), and thence to waste. The system was initially operated to steady state in flow-through mode, then switched to recycle mode. Here the anaerobic Vessel output passed to a Settling Vessel from which settled cells were returned to the aerobic Vessel. Carbon source (acetate) was supplied only to the anaerobic Vessel; increased anaerobic acetate uptake was observed during recycle, which was sustained when the system was returned to flow-through mode and was related to increased cellular lipid inclusions by flow cytometry and electron microscopy. These phenomena may represent adaptation of cells to aerobic-anaerobic cycling with aerobic carbon/energy limitation. Addition of La(3+) to the anaerobic Vessel during recycle mode promoted removal of 95% of the La(3+) from a 0.1 to 0.3 mM (14-42 ppm) solution at the expense of biogenic phosphate.

John D. Towers - One of the best experts on this subject based on the ideXlab platform.

  • ON SOME DIFFERENCE SCHEMES AND ENTROPY CONDITIONS FOR A CLASS OF MULTI-SPECIES KINEMATIC FLOW MODELS WITH DISCONTINUOUS FLUX
    2015
    Co-Authors: Kenneth H. Karlsen, John D. Towers
    Abstract:

    (Communicated by the associate editor name) Abstract. We study a system of conservation laws that describes multi-species kinematic flows with an emphasis on models of multiclass traffic flow and of the creaming of oil-in-water dispersions. The flux can have a spatial discontinuity which models abrupt changes of road surface conditions or of the cross-sectional area in a Settling Vessel. For this system, an entropy inequality is proposed that singles out a relevant solution at the interface. It is shown that “piecewise smooth ” limit solutions generated by the semi-discrete version of a numerical scheme the authors recently proposed [R. Bürger, A. Garćıa, K.H. Karlsen and J.D. Towers, J. Engrg. Math. 60:387–425, 2008] satisfy this entropy inequality. We present an improvement to this scheme by means of a special interface flux that is activated only at a few grid points where the discontinuity is located. While an entropy inequality is established for the semi-discrete versions of the scheme only, numerical experiments support that the fully discrete scheme are equally entropy-admissible

  • ON SOME DIFFERENCE SCHEMES AND ENTROPY CONDITIONS FOR A CLASS OF MULTI-SPECIES KINEMATIC FLOW MODELS WITH DISCONTINUOUS FLUX
    Networks & Heterogeneous Media, 2010
    Co-Authors: Raimund Bürger, Kenneth H. Karlsen, John D. Towers
    Abstract:

    We study a system of conservation laws that describes multi-species kinematic flows with an emphasis on models of multiclass traffic flow and of the creaming of oil-in-water dispersions. The flux can have a spatial discontinuity which models abrupt changes of road surface conditions or of the cross-sectional area in a Settling Vessel. For this system, an entropy inequality is proposed that singles out a relevant solution at the interface. It is shown that "piecewise smooth" limit solutions generated by the semi-discrete version of a numerical scheme the authors recently proposed [R. Burger, A. Garcia, K.H. Karlsen and J.D. Towers, J. Engrg. Math. 60:387-425, 2008] satisfy this entropy inequality. We present an improvement to this scheme by means of a special interface flux that is activated only at a few grid points where the discontinuity is located. While an entropy inequality is established for the semi-discrete versions of the scheme only, numerical experiments support that the fully discrete scheme are equally entropy-admissible.