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Comparison of denitrification between Paracoccus sp. and Diaphorobacter sp.
Appl Biochem Biotechnol. 2011 Sep; 165(1):260-9.AB

Abstract

Denitrification was compared between Paracoccus sp. and Diaphorobacter sp. in this study, both of which were isolated from activated sludge of a denitrifying reactor. Denitrification of both isolates showed contrasting patterns, where Diaphorobacter sp. showed accumulation of nitrite in the medium while Paracoccus sp. showed no accumulation. The nitrate reduction rate was 1.5 times more than the nitrite reduction in Diaphorobacter sp., as analyzed by the resting state denitrification kinetics. Increasing the nitrate concentration in the medium increased the nitrite accumulation in Diaphorobacter sp., but not in Paracoccus sp., indicating a branched electron transfer during denitrification. Diaphorobacter sp. was unable to denitrify efficiently at high nitrate concentrations from 1 M, but Paracoccus sp. could denitrify even up to 2 M nitrate. Paracoccus sp. was found to be an efficient denitrifier with insignificant amounts of nitrite accumulation, and it could also denitrify high amounts of nitrate up to 2 M. Efficient denitrification without accumulation of intermediates like nitrite is desirable in the removal of high nitrates from wastewaters. Paracoccus sp. is shown to suffice this demand and could be a potential organism to remove high nitrates effectively.

Authors+Show Affiliations

Department of Microbiology and Biotechnology Centre, Faculty of Science, The M. S. University of Baroda, Vadodara, Gujarat, India.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21509603

Citation

Chakravarthy, Srinandan S., et al. "Comparison of Denitrification Between Paracoccus Sp. and Diaphorobacter Sp." Applied Biochemistry and Biotechnology, vol. 165, no. 1, 2011, pp. 260-9.
Chakravarthy SS, Pande S, Kapoor A, et al. Comparison of denitrification between Paracoccus sp. and Diaphorobacter sp. Appl Biochem Biotechnol. 2011;165(1):260-9.
Chakravarthy, S. S., Pande, S., Kapoor, A., & Nerurkar, A. S. (2011). Comparison of denitrification between Paracoccus sp. and Diaphorobacter sp. Applied Biochemistry and Biotechnology, 165(1), 260-9. https://doi.org/10.1007/s12010-011-9248-5
Chakravarthy SS, et al. Comparison of Denitrification Between Paracoccus Sp. and Diaphorobacter Sp. Appl Biochem Biotechnol. 2011;165(1):260-9. PubMed PMID: 21509603.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of denitrification between Paracoccus sp. and Diaphorobacter sp. AU - Chakravarthy,Srinandan S, AU - Pande,Samay, AU - Kapoor,Ashish, AU - Nerurkar,Anuradha S, Y1 - 2011/04/21/ PY - 2010/12/22/received PY - 2011/04/04/accepted PY - 2011/4/22/entrez PY - 2011/4/22/pubmed PY - 2012/2/3/medline SP - 260 EP - 9 JF - Applied biochemistry and biotechnology JO - Appl. Biochem. Biotechnol. VL - 165 IS - 1 N2 - Denitrification was compared between Paracoccus sp. and Diaphorobacter sp. in this study, both of which were isolated from activated sludge of a denitrifying reactor. Denitrification of both isolates showed contrasting patterns, where Diaphorobacter sp. showed accumulation of nitrite in the medium while Paracoccus sp. showed no accumulation. The nitrate reduction rate was 1.5 times more than the nitrite reduction in Diaphorobacter sp., as analyzed by the resting state denitrification kinetics. Increasing the nitrate concentration in the medium increased the nitrite accumulation in Diaphorobacter sp., but not in Paracoccus sp., indicating a branched electron transfer during denitrification. Diaphorobacter sp. was unable to denitrify efficiently at high nitrate concentrations from 1 M, but Paracoccus sp. could denitrify even up to 2 M nitrate. Paracoccus sp. was found to be an efficient denitrifier with insignificant amounts of nitrite accumulation, and it could also denitrify high amounts of nitrate up to 2 M. Efficient denitrification without accumulation of intermediates like nitrite is desirable in the removal of high nitrates from wastewaters. Paracoccus sp. is shown to suffice this demand and could be a potential organism to remove high nitrates effectively. SN - 1559-0291 UR - https://www.unboundmedicine.com/medline/citation/21509603/Comparison_of_denitrification_between_Paracoccus_sp__and_Diaphorobacter_sp_ L2 - https://dx.doi.org/10.1007/s12010-011-9248-5 DB - PRIME DP - Unbound Medicine ER -