Nitrous oxide reduction genetic potential from the microbial community of an intermittently aerated partial nitritation SBR treating mature landfill leachate

Gabarró, Jordi; Amo, Elena Hernández-del; Gich, Frédéric; Ruscalleda, Maël; Balaguer, M. Dolors; Colprim, Jesús

doi:10.1016/j.watres.2013.07.057

Cited by 71 publications

(20 citation statements)

References 46 publications

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“…Besides, our study only targets the nirS-based denitrifiers. Because previous work suggested that the contribution of nirS-based denitrifiers in wastewater systems is much more than nirK-based denitrifiers (Gabarró et al, 2013;Kim et al, 2011;Yoshie et al, 2004).…”

Section: Dna Extraction and Real-time Pcr: Analysis Of Nitrifiers Dementioning

confidence: 99%

Enhanced biological nitrogen and phosphorus removal using sequencing batch membrane-aerated biofilm reactor

Sun

Wang

Wei

et al. 2015

Chemical Engineering Science

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Section: Dna Extraction and Real-time Pcr: Analysis Of Nitrifiers Dementioning

confidence: 99%

Enhanced biological nitrogen and phosphorus removal using sequencing batch membrane-aerated biofilm reactor

Sun

Wang

Wei

et al. 2015

Chemical Engineering Science

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“…The DO and NO 3 − -N may have influenced denitrifiers to occur in different concentrations, as shown by the Simpson diversity index in the swine wastewater treatments. Recently, other studies have shown that diversity of the nirK or nirS could be enriched in the range of high COD and NH 4 + -N concentration (Gabarró et al 2014). Yu et al (2014) also found a differential response of the nitrate reductase genes of nirS to concentrations of DO and to concentrations of NO 3 − -N. These studies demonstrate that the functional communities of denitrification could respond differently to the environmental factor in an aquatic ecosystem.…”

Section: Environmental Factors Determine the Diversity In Denitrificamentioning

confidence: 51%

“…Only the nirS gene is reported to be significantly expressed in microbial communities in the sediments of the River Clone estuary (UK) (Nogales et al 2002). Gabarró et al (2014) reported that in an intermittently aerated partial nitritation (PN) sequencing batch reactor (SBR) treating landfill leachate, the nirS gene is the most abundant at the different stages of the experiment in activated sludge. In a tidal flow constructed wetland treating different C/N ratio synthetic wastewater, Zhi and Ji (2014) found that the nirS gene abundance was more than nirK in the sediments.…”

Section: Introductionmentioning

confidence: 99%

Abundance and distribution of microorganisms involved in denitrification in sediments of a Myriophyllum elatinoides purification system for treating swine wastewater

Zhang

Liu

et al. 2015

Environ Sci Pollut Res

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Environmental pollution from livestock production, particularly swine production, is often managed by the use of constructed wetlands, which incorporate plants such as Myriophyllum elatinoides as a means of treating wastewater. The M. elatinoides purification system has been shown to effectively remove, via nitrification and denitrification, more than 90% of the total nitrogen (TN) and 84% of the NH4 (+)-N produced in swine wastewater. However, the mechanisms of variation in aquatic environmental factors and how the interaction of these factors affects denitrification by microorganisms in sediments remain poorly understood. In this study, the impacts of dissolved oxygen (DO), TN, NH4(+)-N, and NO3(-)-N on the abundance, diversity, and community distribution of denitrifiers in the sediments from different concentrations and types of wastewater including tap water (CK), two strengths of synthetic wastewater: 200 mg NH4(+)-N L(-1) (T1) and 400 mg NH4(+)-N L(-1) (T2), swine wastewater diluted 50% (T3), and swine wastewater (T4) were investigated in a microcosm experiment. A significant improvement was observed in the abundance of denitrification genes (nirK and nirS) in response to increased NO3(-)-N and DO in the swine wastewater sediments. The abundance of these denitrification genes was highest in the T4 sediments compared with other treatments. Terminal restriction fragment length polymorphism (T-RFLP) analysis revealed that the DO, TN, and NH4(+)-N positively impacted the richness index (S) of the nirK denitrifiers in T1, whereas the NO3(-)-N negatively affected the Simpson diversity index (D) of nirK and nirS denitrifiers in T3 and T4. However, the NO3(-)-N positively affected the nirK and nirS denitrifier community distribution, whereas the DO negatively affected the nirK and nirS denitrifier distribution in T3 and T4. These findings will be helpful in that they allow us to recognize the effects of environmental factors on the formation of the denitrifiers in the sediments in a M. elatinoides purification system.

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“…4b). The two parts exhibited high similarities with the uncultured bacterium clones of nosZ gene previously found in an intermittently aerated partial nitritation SBR and a highly managed turf grass systems, respectively (Dell et al 2010, Gabarro et al 2013. Nevertheless, all sequences showed a low similarity with the known denitrifying bacteria, indicating these sequences may represent new species.…”

Section: Effect Of Cod/tp Ratio On Nitrifiers and Denitrifiersmentioning

confidence: 63%

Microbial community characteristics during simultaneous nitrification-denitrification process: effect of COD/TP ratio

Zhang

Jia

Wang

et al. 2015

Environ Sci Pollut Res

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To evaluate the impact of chemical oxygen demand (COD)/total phosphorus (TP) ratio on microbial community characteristics during low-oxygen simultaneous nitrification and denitrification process, three anaerobic-aeration (low-oxygen) sequencing batch reactors, namely R1, R2, and R3, were performed under three different COD/TP ratios of 91.6, 40.8, and 27.6. The community structures of each reactor were analyzed via molecular biological technique. The results showed that the composition of ammonia-oxidizing bacteria (AOB) was affected, indicated by Shannon indexes of the samples from R1, R2, and R3. Nitrosomonas was identified to be the dominant AOB in all SBRs. Moreover, the copy numbers of nitrifiers were more than those of denitrifiers, and the phosphorus-accumulating organisms to glycogen-accumulating organisms ratio increased with the decrease of COD/TP ratio.

show abstract

Nitrous oxide reduction genetic potential from the microbial community of an intermittently aerated partial nitritation SBR treating mature landfill leachate

Cited by 71 publications

References 46 publications

Enhanced biological nitrogen and phosphorus removal using sequencing batch membrane-aerated biofilm reactor

Enhanced biological nitrogen and phosphorus removal using sequencing batch membrane-aerated biofilm reactor

Abundance and distribution of microorganisms involved in denitrification in sediments of a Myriophyllum elatinoides purification system for treating swine wastewater

Microbial community characteristics during simultaneous nitrification-denitrification process: effect of COD/TP ratio

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