A fundamental study on biological removal of N2O in the presence of oxygen

Figueroa‐González, Ivonne; Quijano, Guillermo; Laguna, I. Gasser; Muñoz, Raúl; García‐Encina, Pedro A.

doi:10.1016/j.chemosphere.2016.05.046

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…Though the genus Dokdonella has not yet been associated with pharmaceutical degradation it has been detected in alkane degrading cultures (Alonso-Gutiérrez et al 2009) and a Dokdonella potentially degrading polycyclic aromatic hydrocarbons was detected by Bacosa and Inoue (2015). Moreover, Dokdonella has been previously isolated from denitrifying environments in the presence of O2 (Sun et al 2009) and was one of the predominant microorganisms in a study with activated sludge at 2% O2 concentration (without inhibitory effects on N2O biodegradation), in which it was suggested that heterotrophic denitrification was the most likely mechanism of N2O removal (Figueroa-González et al 2016). It may therefore be hypothesized that the Dokdonella corresponding to OTU_10 may have used the nitrate generated after the release of the amine group from 4-aminophenol (by substitution by a hydroxyl group) as an electron receptor to obtain energy by oxidation of hydroquinone (the aromatic organic compound generated by the amine group release of 4-aminophenol) and/or by oxidation of the simpler carbon compounds generated in the degradation of hydroquinone by other microorganisms (such as Pseudomonas).…”

Section: Bacterial Communities Degrading Paracetamolmentioning

confidence: 98%

Putative Role of Flavobacterium, Dokdonella and Methylophilus Strains in Paracetamol Biodegradation

Palma

Donaldben

Costa

et al. 2018

Water Air Soil Pollut

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Paracetamol, the most widely and globally used analgesic and antipyretic, is easily accumulated in aquatic environments. In the present study, the biodegradation of paracetamol in different media (one for general growth, one specific for sulphate reducing bacteria, a mineral salts medium and municipal wastewater) inoculated with two types of sludge (from anaerobic lagoon and from oxidation ditch) under different oxygenic conditions (anoxic; moderate oxygenation in open flasks and high oxygenation by aeration) was investigated. In addition, bacteria with relative abundances increasing simultaneously with paracetamol degradation, when this drug was the only carbon source, thus with a putative role in its degradation, were identified using 16S rRNA gene sequences. The results show that aerobic microorganisms had a major role in the degradation of paracetamol, with 50 mg/L totally removed from municipal wastewater after two days incubation with aeration, and that the metabolites 4-aminophenol and hydroquinone plus one compound not identified in this work were produced in the process. The identification of bacteria with a role in the degradation of paracetamol revealed a strain from genus Pseudomonas with the highest final relative abundance of 21.2%, confirming previous works reporting strains of this genus as paracetamol decomposers. Besides, genera Flavobacterium, Dokdonella and Methylophilus were also in evidence, with initial relative abundances of 1.66%, 1.48% and 0.00% (not detected) in the inoculum and 6.91%, 3.80% and 3.83% after incubation, respectively. Therefore, a putative role of these genera in paracetamol biodegradation is suggested for the first time. Response to Reviewers: Dear reviewer First of all we are very thankful for the time you have spent in revising this manuscript. We consider that all the comments and questions raised are extremely helpful in order to improve the manuscript. Thus, aiming to clarify all doubts and to meet the quality demanded of this scientific journal, we have made the suggested corrections and answered all the questions posed.

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Section: Bacterial Communities Degrading Paracetamolmentioning

confidence: 98%

Putative Role of Flavobacterium, Dokdonella and Methylophilus Strains in Paracetamol Biodegradation

Palma

Donaldben

Costa

et al. 2018

Water Air Soil Pollut

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“…Of the PGPR, we identified increasing abundances of nitrogen-fixers such as Allorhizobium/Rhizobium, Azotobacter, Burkholderia/Paraburkholderia , and Paenibacillus (Estrada-De Los Santos et al, 2001; Govindarajan et al, 2008; Martín et al, 1993; von der Weid et al, 2002; Wang et al, 2020; Zahran, 1999), which could have contributed to increasing concentrations of NH 4 + in mature bokashi. The relative abundance of several other nitrogen-fixing bacterial genera also increased, including Clostridium sensu stricto, Dokdonella, Rhodanobacter , and Sphingomonas (Figueroa-González et al, 2016; Huang et al, 2016; Wang et al, 2020; Zhou et al, 2021). Conversely, phosphate solubilizing bacteria (PBR) such as Acinetobacter and Pseudomonas decreased in abundance, which was consistent with decreased concentrations of PO 4 3- during bokashi maturation (Pathma and Sakthivel, 2013).…”

Section: Discussionmentioning

confidence: 99%

Microbial transformation of traditional fermented fertilizer bokashi alters chemical composition and improves plant growth

Abo-Sido

Goss

Griffith

et al. 2021

Preprint

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Bokashi is an organic soil amendment that makes use of microbial processes to break down agricultural waste and create a nutrient-rich fertilizer. The benefits of various types of bokashi on soil fertility and plant growth are well documented, however the changes in microbial community composition and nutrients during bokashi maturation remain poorly characterized. Here, we aimed to identify potential differences in the quality of bokashi made using different ingredients and to investigate the biochemical transformation and microbial community succession of bokashi throughout the maturation process. We compared the effects of these different types of bokashi on the growth of cucumber (Cucumis sativus) and kale (Brassica napus subsp. pabularia) seedlings, measured concentrations of NH4+ and PO43-, and characterized the bokashi bacterial and fungal communities over a 12-day maturation period. We found that cucumber and kale plants growing in all types of bokashi-amended soils exhibited increased chlorophyll levels and dry biomass. During bokashi maturation, we observed a decrease in available PO43-, and an increase in NH4+. There also appeared to be an increase in relative abundances of decomposers and beneficial microbes and a decrease in putative plant pathogens. Regardless of starting bokashi ingredients and differences in microbial composition and nutrient trends, all types of bokashi similarly improve plant growth and contain beneficial microbes.

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“…(Proteobacteria phylum) and unclassified Microbacteriaceae (Actinobacteria phylum). The genus Dokdonella has been involved in heterotrophic denitrification (Figueroa-González et al, 2016;Palma et al, 2018), while members of the family Microbacteriaceae have been predominantly found in terrestrial and aquatic ecosystems with putative functions related to plant pathogenicity (Glöckner et al, 2000;Lory, 2014;Young, 2008). Indicator taxa within the order Alphaproteobacteria represented the similar bacterial communities of the rooibos tea-associated microbiomes in unfertilized (indicator OTU Acidisoma spp.…”

Section: Discussionmentioning

confidence: 99%

Distinct microbial communities alter litter decomposition rates in a fertilized coastal plain wetland

Koceja

Bledsoe

Goodwillie

et al. 2019

Preprint

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Anthropogenic disturbances have led to increased deposition of nitrogen (N) and phosphorus (P) into soils. Nutrient enrichment of soils is known to increase plant biomass and also increase rates of microbial litter decomposition. Thus, examining plant-soil-microbial interactions and their influence on decomposition rates is essential for predicting microbial contributions to carbon (C) cycling as atmospheric deposition persists. This study explores how changes in organic C, nitrogen (N), and phosphorus (P) caused by long-term nutrient enrichment and known litter-type composition influence soil microbial community structure and function. It is hypothesized that long-term nutrient enrichment causes shifts in soil microbial community structure that lead to higher rates of litter decomposition. Further, plant litter with a lower C: N ratio (compared to high C:N ratio litter) is expected to decompose faster due to an available N source provided to nutrient-starved microbes. We leverage a long-term experimental fertilization and disturbance by mowing experiment to test how nutrient enrichment affects decomposition and soil bacterial community structure in a nutrient poor coastal plain wetland. In each of eight replicate mowed/fertilized and mowed/unfertilized plots, bags of two different litter types (high C:N ratio rooibos tea and low C:N ratio green tea) were buried for 111 days. We characterized litterassociated and bulk soil microbiomes using 16S rRNA bacterial sequencing and quantified litter mass losses. As predicted, the green tea litter decomposed faster than the rooibos tea litter.Results also revealed that distinct bacterial communities were involved in decomposing rooibos tea litter (higher C:N ratio) more quickly in fertilized compared to unfertilized especially under drier soil conditions, while decomposition rates of green tea litter (lower C:N ratio) were similar between fertilized and unfertilized plots. Bacterial community structure in part explained litter decomposition rates, and long-term fertilization and drier hydrologic status affected bacterial

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A fundamental study on biological removal of N2O in the presence of oxygen

Cited by 19 publications

References 24 publications

Putative Role of Flavobacterium, Dokdonella and Methylophilus Strains in Paracetamol Biodegradation

Putative Role of Flavobacterium, Dokdonella and Methylophilus Strains in Paracetamol Biodegradation

Microbial transformation of traditional fermented fertilizer bokashi alters chemical composition and improves plant growth

Distinct microbial communities alter litter decomposition rates in a fertilized coastal plain wetland

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