The conventional process to remove nitrate from water, the biological denitrification, uses the addition of dissolved organic carbon that has the potential risk to further deteriorate water quality. Thus, this work aimed to evaluate the specific denitrification activity of a mixed microbial culture and a pure culture of Pseudomonas stutzeri with solid substrates such as polycaprolactone (PCL), polylactic acid (PLA), and starch. The highest nitrate reduction activity was obtained with a microbial mixed culture using starch, 104 mg N2-N/(g VSS.d), and PCL, 97 mg N2-N/(g VSS.d), followed by PLA, 53 mg N2-N/(g VSS.d). A considerable advantage of using biopolymers in water denitrification is the reduced risk of contaminating the water with soluble biodegradable organic carbon.
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Research Article|
January 01 2012
Use of biopolymers as solid substrates for denitrification Available to Purchase
A. L. Rodrigues;
1IBB – Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar 4700-057 Braga, Portugal
E-mail: [email protected]
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A. Mosquera-Corral;
A. Mosquera-Corral
2Department of Chemical Engineering, School of Engineering, Lope Gómez de Marzoa, s/n, E-15782, University of Santiago de Compostela, Spain
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A. V. Machado;
A. V. Machado
3IPC – Institute for Polymers and Composites/I3N, University of Minho, Campus de Azurém 4800-058 Guimarães, Portugal
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I. Moura;
I. Moura
3IPC – Institute for Polymers and Composites/I3N, University of Minho, Campus de Azurém 4800-058 Guimarães, Portugal
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M. I. Matos;
M. I. Matos
1IBB – Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar 4700-057 Braga, Portugal
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A. G. Brito;
A. G. Brito
1IBB – Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar 4700-057 Braga, Portugal
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R. Nogueira
1IBB – Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar 4700-057 Braga, Portugal
E-mail: [email protected]
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Water Sci Technol (2012) 65 (1): 105–111.
Article history
Received:
May 26 2011
Accepted:
August 23 2011
Citation
A. L. Rodrigues, A. Mosquera-Corral, A. V. Machado, I. Moura, M. I. Matos, A. G. Brito, R. Nogueira; Use of biopolymers as solid substrates for denitrification. Water Sci Technol 1 January 2012; 65 (1): 105–111. doi: https://doi.org/10.2166/wst.2011.835
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