Microbial community structure and dynamics in a mixotrophic nitrogen removal process using recycled spent caustic under different loading conditions

Park, Sora; Yu, Jaecheul; Byun, Imgyu; Cho, Sunja; Park, Taejoo; Lee, Tae‐Ho

doi:10.1016/j.biortech.2011.04.091

Cited by 27 publications

(9 citation statements)

References 33 publications

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“…They were all marine bacteria, and Pseudoalteromonas and Halomonas genus were frequently reported as denitrifier . Halomonas campisalis could remove 70% TN at a salinity level of 40 g L −1 NaCl . Obviously, DR had a strong effect on microbial community in SND SBBR systems.…”

Section: Resultsmentioning

confidence: 95%

Intensification and microbial pathways of simultaneous nitrification–denitrification in a sequencing batch biofilm reactor for seawater‐based saline wastewater treatment

Feng

Yang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND The optimum condition and potential mechanism of simultaneous nitrification–denitrification (SND) in a sequencing batch biofilm reactor (SBBR) have not been fully classified under salinity stress using real coastal seawater. In this study, a SBBR system under salinity stress was operated to optimize SND performance by changing the intermittent aeration intensity and drainage ratio (DR), and the microbial pathway of optimum SND was examined. RESULTS Results showed that the increase in salinity with coastal seawater ratio of no more than 50% obviously decreased SND efficiency from 66.4 ± 7.3% to 51.3 ± 7.4% mainly due to the decline of denitrification activity. The optimum SND performance of 68.1 ± 7.6% was observed when dissolve oxygen (DO) level decreased from 5.55 ± 0.31 mg L−1to 2.21 ± 0.42 mg L−1 in the aerobic phase of intermittent aeration and DR increased from 0.14 to 0.23. More functional bacteria including anoxic and aerobic denitrifiers coexisted under the optimum condition. Also, heterotrophic nitrifiers rather than autotrophic nitrifiers mainly contributed to nitrification under salinity stress in the optimum system. CONCLUSIONS A SBBR system showed efficient SND under salinity stress by control of DR and intermittent aeration intensity due to the enhancement of functional bacteria including anoxic and aerobic denitrifiers and heterotrophic nitrifiers. © 2018 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 95%

Intensification and microbial pathways of simultaneous nitrification–denitrification in a sequencing batch biofilm reactor for seawater‐based saline wastewater treatment

Feng

Yang

et al. 2018

J of Chemical Tech & Biotech

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“…High-throughput pyrosequencing technology has been used in different microbial ecology branches, such as microbial diversity and functional genes diversity [15], and for analysis of environmental samples including marine water and wastewater treatment plant influent [14,16,17]. This technology was also applied to activated sludge, mostly without any effort to relate the results to observed process kinetics [14,[18][19][20][21]. Only in a recent study, observation of a variable kinetics as a function of culture history was related to induced changes in the microbial community, assessed by means of 454-pyrosequencing [22].…”

Section: Introductionmentioning

confidence: 99%

Pyrosequencing reveals the inhibitory impact of chronic exposure to erythromycin on activated sludge bacterial community structure

Pala‐Özkök

Rehman

Ubay‐Cokgor

et al. 2014

Biochemical Engineering Journal

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“…[16,17] Although hydrogen is an excellent electron donor for denitrification, need for complex hydrogen delivering systems increases the capital costs and may create explosion risks. [16] Another alternative is the use of soluble sulphur compounds as an electron source to reach high denitrification rates.…”

Section: Introductionmentioning

confidence: 99%

“…[16] Another alternative is the use of soluble sulphur compounds as an electron source to reach high denitrification rates. Thiosulphate may be used for this purpose according to the following reaction [17]:…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of autotrophic denitrification process and the impact of sulphur/limestone ratio on the process performance

Kılıç

Şahinkaya

Çınar

2014

Environmental Technology

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Kinetics of sulphur-limestone autotrophic denitrification process in batch assays and the impact of sulphur/limestone ratio on the process performance in long-term operated packed-bed bioreactors were evaluated. The specific nitrate and nitrite reduction rates increased almost linearly with the increasing initial nitrate and nitrite concentrations, respectively. The process performance was evaluated in three parallel packed-bed bioreactors filled with different sulphur/limestone ratios (1:1, 2:1 and 3:1, v/v). Performances of the bioreactors were studied under varying nitrate loadings (0.05 - 0.80 gNO(-)(3) - NL⁻¹ d⁻¹) and hydraulic retention times (3-12 h). The maximum nitrate reduction rate of 0.66 g L⁻¹ d⁻¹ was observed at the loading rate of 0.80 g NO(-)(3) - N L⁻¹ d⁻¹ in the reactor with sulphur/limestone ratio of 3:1. Throughout the study, nitrite concentrations remained quite low (i.e. below 0.5 mg L⁻¹ NO(-)(2) -N. The reactor performance increased in the order of sulphur/limestone ratio of 3:1, 2:1 and 1:1. Denaturing gradient gel electrophoresis analysis of 16S rRNA genes showed quite stable communities in the reactors with the presence of Methylo virgulaligni, Sulfurimonas autotrophica, Sulfurovum lithotrophicum, Thiobacillus aquaesulis and Sulfurimonas autotrophica related species.

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Microbial community structure and dynamics in a mixotrophic nitrogen removal process using recycled spent caustic under different loading conditions

Cited by 27 publications

References 33 publications

Intensification and microbial pathways of simultaneous nitrification–denitrification in a sequencing batch biofilm reactor for seawater‐based saline wastewater treatment

Intensification and microbial pathways of simultaneous nitrification–denitrification in a sequencing batch biofilm reactor for seawater‐based saline wastewater treatment

Pyrosequencing reveals the inhibitory impact of chronic exposure to erythromycin on activated sludge bacterial community structure

Kinetics of autotrophic denitrification process and the impact of sulphur/limestone ratio on the process performance

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