Nitrogen removal by heterotrophic nitrifying and aerobic denitrifying bacterium Pseudomonas sp. DM02: Removal performance, mechanism and immobilized application for real aquaculture wastewater treatment

Deng, Min; Zhao, Xiaoli; Yeerken, Senbati; Song, Kang; He, Xinyi

doi:10.1016/j.biortech.2020.124555

Cited by 113 publications

(28 citation statements)

References 32 publications

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“…The process promotes the reduction of nitrate to nitrogen gas (N2), and is carried out by bacteria of the genera Alcaligenes, Archromobacter, Thiosphaera, Rhodopseudomonas, Methanofollis sp., Bacillus sp., Pseudomonas sp., Paracoccus sp. and Enterococcus, which use nitrate in their respiratory process, removing nitrate from the medium (Deng et al, 2021;John et al, 2020). As in nitrification processes, denitrification processes can also be affected by some operational factors, such as pH, temperature, amount of organic carbon (C/N ratio) present in the medium and the concentration of DO, since the denitrification is anoxic and DO concentrations above 2 mg L -1 significantly limit the development and activity of denitrifying bacteria, which can lead to the accumulation of intermediate substances such as nitrite, nitric oxide and nitrous oxide (Zoppas et al, 2016).…”

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

“…Unlike conventional denitrification and Anammox processes, in this process, nitrification and denitrification occur simultaneously, in the same reactor and under the same operating conditions. SND removal is performed by heterotrophic aerobic nitrification and denitrification (HNDA) bacteria (Deng et al, 2021), and the removal process occurs within the biofilm due to the biomass oxygen gradient, which favors the simultaneous propagation of the bacteria nitrifying and denitrifying due to uneven oxygen distribution. Thus, nitrifying bacteria are found in areas of the biofilm that have the highest concentration of DO, while denitrifying bacteria are found in areas where OD is limited (Zoppas et al, 2016).…”

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

“…Some strains of HNAD bacteria have been extensively studied and have been found and isolated from different environments, such as Acinetobacter, Bacillus, Cupriavidus, Halomonas, Klebsiella, Marinobacter, Pseudomonas and Photobacterium (Huang et al, 2020). According to Deng et al (2021), HNAD bacteria are not limited to the presence of dissolved oxygen in aquaculture systems, presenting high denitrification efficiency. However, despite being able to reach the stationary phase in 24 hours with an average efficiency of 90% of removal of nitrogen, for the complete process of nitrification to occur, the HNAD bacteria require a longer period, which can reach weeks.…”

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

“…As an advantage, the use of simultaneous nitrification and denitrification processes promotes a reduction in the surface used, which translates into savings in space and infrastructure. In addition, COD and nitrogen removal are one of the advantages of these systems, providing a 30-40% reduction in electrical energy consumption in aeration when compared to conventional nitrification and denitrification processes (Deng et al, 2021).…”

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

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Removal of nutrients from aquaculture residual water: A review

Cargnin¹,

João²

2021

Rev. ambiente água

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Aquaculture plays an important role in providing protein-rich foods, meeting the growing demand for fish. However, aquaculture is a potentially polluting activity, especially with regard to water pollution, due to the improper disposal of wastewater from the production process. Aquaculture wastewater is rich in nutrients (ammonia, nitrate, nitrite and phosphorus) and organic matter, and is commonly discharged into the environment without proper treatment. This can cause a series of environmental impacts and aggravate the current water crisis. Due to the importance and need to reduce environmental impacts, plan the use of water resources and achieve an efficient and sustainable production process, many researchers have focused their studies on effluent treatment techniques designed to remove these nutrients. This article therefore presents an updated review of the main physicochemical and biological techniques used in the removal of nutrients, which can mitigate environmental problems arising from aquaculture activities and contribute to the sustainability of the activity. Keywords: biological removal, nitrogen compounds, sustainable activity.

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Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

Section: Biological Treatment Techniques Used To Remove Nutrients From Aquaculture Wastewatermentioning

confidence: 99%

See 2 more Smart Citations

Removal of nutrients from aquaculture residual water: A review

Cargnin¹,

João²

2021

Rev. ambiente água

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“…Thus, the primary task of wastewater treatment is the removal of inorganic nitrogen. Therefore, developing green and sustainable strategies to remove inorganic nitrogen pollutants is of great interest ( Deng et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

et al. 2021

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The discharge of excess nitrogenous pollutants in rivers or other water bodies often leads to serious ecological problems and results in the collapse of aquatic ecosystems. Nitrogenous pollutants are often derived from the inefficient treatment of industrial wastewater. The biological treatment of industrial wastewater for the removal of nitrogen pollution is a green and efficient strategy. In the initial stage of the nitrogen removal process, the nitrogenous pollutants are converted to ammonia. Traditionally, nitrification and denitrification processes have been used for nitrogen removal in industrial wastewater; while currently, more efficient processes, such as simultaneous nitrification-denitrification, partial nitrification-anammox, and partial denitrification-anammox processes, are used. The microorganisms participating in nitrogen pollutant removal processes are diverse, but information about them is limited. In this review, we summarize the microbiota participating in nitrogen removal processes, their pathways, and associated functional genes. We have also discussed the design of efficient industrial wastewater treatment processes for the removal of nitrogenous pollutants and the application of microbiome engineering technology and synthetic biology strategies in the modulation of the nitrogen removal process. This review thus provides insights that would help in improving the efficiency of nitrogen pollutant removal from industrial wastewater.

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Characteristics and mechanism of heterotrophic nitrification/aerobic denitrification in a novel Halomonas piezotolerans strain

Dong

et al. 2021

J Basic Microbiol

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A strain was isolated from an activated sludge system and identified as Halomonas piezotolerans HN2 in this study, which is the first strain in H. piezotolerans with the capability of heterotrophic nitrification and aerobic denitrification. Strain HN2 showed the maximum nitrogen removal rate of 9.10 mg/L/h by utilizing ammonium at the salinity of 3.0%. Under saline environment, HN2 could remove nitrogen efficiently in neutral and slightly alkaline environments, with the carbon sources of sodium succinate and sodium citrate and the C/N ratio of 15-20, and the maximum removal efficiencies of ammonium, nitrite, and nitrate were 100%, 96.35%, and 99.7%, respectively.The genomic information revealed the presence of amoA, napA, and nosZ genes in strain HN2, and the target bands of nirS were obtained via a polymerase chain reaction. Therefore, we inferred that ammonium was mainly utilized for the growth of strain HN2 through assimilation, and another part of the initial ammonium was converted into nitrate through nitrification, and then into gaseous nitrogen through denitrification. This report indicated the potential application of strain HN2 and other nitrifying and denitrifying Halomonas strains in the removal of nitrogen pollution in marine-related environments and also implies the important role of Halomonas in the nitrogen cycle process of the ocean.

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Nitrogen removal by heterotrophic nitrifying and aerobic denitrifying bacterium Pseudomonas sp. DM02: Removal performance, mechanism and immobilized application for real aquaculture wastewater treatment

Cited by 113 publications

References 32 publications

Removal of nutrients from aquaculture residual water: A review

Removal of nutrients from aquaculture residual water: A review

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

Characteristics and mechanism of heterotrophic nitrification/aerobic denitrification in a novel Halomonas piezotolerans strain

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