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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Immobilized cells in microbial nitrate reduction.

I Nilsson1, S Ohlson

  • 1Divisions of Technical Microbiology, Chemical Center, University of Lund, S-220 07, PO Box 740, Lund 7, Sweden.

Applied Biochemistry and Biotechnology
|November 16, 2013
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Summary
This summary is machine-generated.

Pseudomonas denitrificans immobilized in alginate effectively reduced nitrate. The immobilized microbial cells demonstrated a significant nitrate reduction rate of 0.8 mg NO3-/min/g wet weight.

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Area of Science:

  • Microbiology
  • Biotechnology
  • Environmental Science

Background:

  • Nitrate (NO3-) contamination is a significant environmental concern.
  • Microbial denitrification offers a sustainable bioremediation approach.
  • Immobilization enhances microbial stability and reusability.

Purpose of the Study:

  • To immobilize Pseudomonas denitrificans in alginate beads.
  • To assess the nitrate (NO3-) reducing capacity of immobilized cells.
  • To evaluate the potential of this system for nitrate bioremediation.

Main Methods:

  • Pseudomonas denitrificans cells were entrapped within an alginate matrix.
  • Nitrate (NO3-) reduction activity was measured using immobilized cell preparations.
  • Assays were conducted to quantify the rate of nitrate removal.

Main Results:

  • Immobilized Pseudomonas denitrificans cells exhibited robust nitrate (NO3-) reducing activity.
  • A consistent reduction rate of 0.8 mg NO3-/min/g wet weight was achieved.
  • Alginate immobilization provided a stable environment for microbial function.

Conclusions:

  • Alginate-immobilized Pseudomonas denitrificans is an effective system for nitrate (NO3-) reduction.
  • This method shows promise for practical applications in wastewater treatment and environmental cleanup.
  • Further research can optimize conditions for enhanced bioremediation efficiency.