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Typology and activity of nitrifying microbial communities from livestock and industrial WWTP

Abstract : This work describes the characterization of the nitrifying microbial community of nineteen treatment plants treating municipal or industrial food processing wastewaters. Activated sludges were analyzed for their maximal activities of nitritation and nitratation by liquid respirometry. While the activated sludge from municipal and livestock WWTPs exhibit similar activities within each group, the other treatment plants have very different activities. The diversity and quantity of nitrite and nitrate oxidizing communities were studied by T-RFLP and real-time quantitative PCR. Between the sites studied, differences in community structure are shown. The nitrite oxidizing biomass is, for all activated sludges, composed of bacteria and archaea, but with different ratios from one plant to another. The majority of the sludges shows a community of nitrite oxidizing bacteria dominated by the genus Nitrosomonas. The few stations with a dominance of Nitrosospira have activities of nitrite and nitrate oxidation close to zero or very low. This correlation between the presence of Nitrosospira and a potential problem in nitrification activity should be verified on site to quickly detect problems in the treatment of nitrogen. This analysis also shows that half of the stations of this study present a community of nitrite-oxidizing bacteria composed of Nitrospira and Nitrobacter. Among all the quantified populations, only the number of nitrite oxidizing bacteria correlates with the
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https://hal.inrae.fr/hal-02595573
Contributor : Migration Irstea Publications <>
Submitted on : Friday, May 15, 2020 - 8:09:32 PM
Last modification on : Friday, November 27, 2020 - 3:54:03 PM

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  • HAL Id : hal-02595573, version 1
  • IRSTEA : PUB00032819

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V. Estébanez, Fabrice Béline, S. Le Roux, P. Saint Cast, P. Dabert. Typology and activity of nitrifying microbial communities from livestock and industrial WWTP. Microbes in Wastewater and Waste Treatment, Bioremediation and Energy Production - MWT, Jan 2011, Goa, India. pp.22. ⟨hal-02595573⟩

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