Heterotrophic aerobic denitrification by novel bacterium Georgenia daeguensis ARB2 for treatment of nitrate contaminated waters

Rajta, Ankita; Setia, Hema; Shukla, Shivani; Bhatia, Ranjana

doi:10.1007/s13762-021-03253-x

Cited by 10 publications

(6 citation statements)

References 58 publications

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“…If the soil is not sterile and the bacterial content is not zero, over time, the bacteria grow and the contaminants in the water are used by the bacterial as feed, and as result, the growth of bacterial increase, the pollutant concentration at the outlet of the column decreases. These results are consistent with ndings of Tangsir et al (2018) and Rajta et al (2021).…”

Section: Effect Of Competitor Anionssupporting

confidence: 94%

Biological Removal of Groundwater’s Nitrate under Sterile and Non-sterile Soil Conditions (Lab Experiment and Simulation)

Samani

Tabatabaei

Abbasi³

et al. 2022

Preprint

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Nitrate is potentially harmful in an aquatic environment however it can be converted into more dangerous forms by microbial activities. In this research, we tested the efficiency of nitrate removal by using a denitrification bed (DB) containing in sterile soil (SS) and non-sterile soil (NSS) media. A Marriott column and a Plexiglas column filled with a clay loam soil were used as the water resource and DB, respectively. Potassium nitrate used to make different nitrate concentrations including 24, 50 and 100 (mg l-1). The nitrate was injected up to ten pore volumes (PV), when the soil was sterile, only active surfaces within the soil matrix acted as an adsorbent. The number of bacteria and the bacteria growth was investigated at the end of each experiment. The solute transfer parameters were estimated by using soil hydraulic parameters at HYDRUS model. As result, the growth of bacteria and the concentration of pollutants in the output of the column decreased in SS media. In the NSS with a concentration of 100 mg nitrate, the number of bacteria increased to the highest, 80000 bacterial number. The presence of rival anions in the solution has a negative impact on reducing the adsorption rate and removal of nitrate. In NSS with nitrate concentration of 24 (mg l-1), the removal nitrate efficiency nearly 99.5 (%). There was a significant difference between nitrate concentration of the SS and NSS conditions (p<0.05). The value of the diffusion coefficient is 4.99 (cm). Sensitivity analyses demonstrated that saturated hydraulic conductivity had the greatest effect on the variations of nitrate concentration. Besides, the correlation coefficient between simulated values and observed values by the HYDRUS-1D model varied between 0.90 and 0.99.

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Section: Effect Of Competitor Anionssupporting

confidence: 94%

Biological Removal of Groundwater’s Nitrate under Sterile and Non-sterile Soil Conditions (Lab Experiment and Simulation)

Samani

Tabatabaei

Abbasi³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…If the soil is not sterile and the bacterial content is not zero, over time, the bacteria grow and the contaminants in the water are used by the bacterial as feed, and as result, the growth of bacterial increase, the pollutant concentration at the outlet of the column decreases. These results are consistent with findings of Tangsir et al (2018) and Rajta et al (2021). Table 4 shows the efficiency (R), removal rate of nitrate (RNO3 -) and hydraulic retention time (HRT) in the both SS and NSS conditions.…”

Section: Efficiency and Removal Rate Of Nitratesupporting

confidence: 92%

Ex-situ Biological Removal of Nitrate from Groundwater with Sterile and Non-sterile Porous media (Lab Experiment and Simulation)

Samani

Tabatabaei

Abbasi

et al. 2022

Preprint

View full text Add to dashboard Cite

Nitrate is potentially harmful in an aquatic environment however it can be converted into other forms by microbial activities. In this research, we tested the efficiency of nitrate removal by using a denitrification bed containing two porous media; sterile soil (SS) and non-sterile soil (NSS). A Marriott column which is making constant water flux and a Plexiglas column filled with a clay loam soil, respectively. Potassium nitrate used to make different nitrate concentrations including 24, 50 and 100 (mg l− 1). The nitrate was injected up to ten pore volumes (PV( .The solute transfer parameters were estimated by using soil hydraulic parameters at HYDRUS model. As result, the growth of bacteria and the concentration of pollutants in the output of the column decreased in SS media. In the NSS with a concentration of 100 mg/ l nitrate, the number of bacteria increased to the highest, 80000 bacterial number. The presence of rival anions in the solution has a negative impact on removal of nitrate. In NSS with nitrate concentration of 24 (mg l− 1), the removal nitrate efficiency nearly 99.5 (%). Sensitivity analyses demonstrated that saturated hydraulic conductivity had the greatest effect on the variations of nitrate concentration. Besides, the correlation coefficient between simulated and observed values varied between 0.90 and 0.99. Overall, the NSS with an inlet nitrate concentration of 24 (mg l− 1), the highest nitrate removal efficiency was obtained. The total amount of bacteria of NSS at the end of the experiment has been increased because of the bacteria growth.

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“…On days 2 and 30, the most dominant genus was Pseudomonas; unidentified Propionibacteriaceae and Gerogenia had higher abundances on day 60, and on day 90, Candidatus bacilloplasma exhibited the highest abundance. Georgenia is a denitrifying phosphorous-accumulating bacterium that can use nitrate as its sole nitrogen source and utilize carbon sources to remove nitrate and total phosphorus concentrations from the environment, and it is speculated that the increase in abundance may be related to the accumulation of nitrogen compounds in the culture environment [21,22]. Candidatus Bacilloplasma is commonly found in the intestinal tract of crustaceans, and considered one of the beneficial gut bacteria [23].…”

Section: Analysis Of Dynamic Changes Of Gut Microbial Communitymentioning

confidence: 99%

Dynamic Changes of Environment and Gut Microbial Community of Litopenaeus vannamei in Greenhouse Farming and Potential Mechanism of Gut Microbial Community Construction

Li,

Gu,

Wang

et al. 2024

Fishes

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The aim of this study was to investigate the dynamic changes in the microbial communities of both the environment and gut of Litopenaeus vannamei, as well as to elucidate the mechanisms underlying microbial community assembly in greenhouse farming. 16S rDNA high-throughput sequencing and bioinformatics methods were used to carry out the research on the community structure of the microorganisms under greenhouse culture conditions in water, sediment, and gut microorganisms; correlations pertaining to environmental factors; the feasibility of using Source Tracker; and the mechanisms of community construction. The results show that the dominant microorganisms in water, sediment, and gut farming in a greenhouse environment varied and were subject to dynamic change. A variety of beneficial microbiota such as Bacillus were found in the gut, whereas a variety of microorganisms such as Marivita and Pseudomonas, which function as nitrogen and phosphorus removers, were present in water. Source Tracker and environmental correlation analyses showed that changes in the gut were associated with eutrophication indicators (total nitrogen, total phosphorus, ammonia nitrogen) and changes in environmental microorganisms (in water and sediment). The results of the community-building mechanism analysis show that stochastic processes determine the community-building directions of environmental and gut microorganisms. These findings will help us to understand the microbiota characteristics of shrimp ponds under greenhouse farming conditions, and the complex interactions between the shrimp gut and the environmental microbiota and environmental variables, as well as revealing the changing rules of the gut microbiota.

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Heterotrophic aerobic denitrification by novel bacterium Georgenia daeguensis ARB2 for treatment of nitrate contaminated waters

Cited by 10 publications

References 58 publications

Biological Removal of Groundwater’s Nitrate under Sterile and Non-sterile Soil Conditions (Lab Experiment and Simulation)

Biological Removal of Groundwater’s Nitrate under Sterile and Non-sterile Soil Conditions (Lab Experiment and Simulation)

Ex-situ Biological Removal of Nitrate from Groundwater with Sterile and Non-sterile Porous media (Lab Experiment and Simulation)

Dynamic Changes of Environment and Gut Microbial Community of Litopenaeus vannamei in Greenhouse Farming and Potential Mechanism of Gut Microbial Community Construction

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