Enhanced denitrification at biocathode facilitated with biohydrogen production in a three-chambered bioelectrochemical system (BES) reactor

Zhu, Chunyan; Wang, Hengliang; Yan, Qun; He, Rong; Zhang, Guangsheng

doi:10.1016/j.cej.2016.11.152

Cited by 96 publications

(14 citation statements)

References 39 publications

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“…These two bands were identified as Thauera sp . The species have been reported as important organic compound degraders and nitrogen removal bacterium . Besides, Thauera sp .TN9 achieved NH 4 + ‐N removal efficiency of 99.8% and was capable of EPS secretion .…”

Section: Resultsmentioning

confidence: 99%

“…Thermomonas was reported to be a strong denitrifier in wastewater treatment systems. It could obtain both carbon and nitrate/nitrite from chemolithoautotrophic nitrifying bacteria . It is notable that Uncultured Parabacteroides sp .…”

Section: Resultsmentioning

confidence: 99%

“…It could obtain both carbon and nitrate/nitrite from chemolithoautotrophic nitrifying bacteria. 33,34 It is notable that Uncultured Parabacteroides sp. clone HH1-5-25 (band 2) again became the dominant microbes at the end of Stage H (day 101).…”

Section: Identification Of Dominant Species In the Agsmentioning

confidence: 99%

“…The species have been reported as important organic compound degraders and nitrogen removal bacterium. 34,37 Besides, Thauera sp.TN9 achieved NH 4 + -N removal efficiency of 99.8% and was capable of EPS secretion. 7,38 These results suggested that this microbe was likely to be important to maintain AGS stability in structure and nitrogen removal.…”

Section: Identification Of Dominant Species In the Agsmentioning

confidence: 99%

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Effects of influent loads on performance and microbial community dynamics of aerobic granular sludge treating piggery wastewater

Chen

Huang

Tian

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Understanding how influent loads affect the microbial community may promote applications of aerobic granular sludge (AGS). Herein, performance and microbial community dynamics of the AGS were assessed with stepwise increasing influent loads. RESULTS AGS exhibited good structure stability and effective removal efficiency; when the influent load increased from 6.5 kg COD m‐3 d‐1 (0.255 NH4+‐N m‐3 d‐1) to 10.1 kg COD m‐3 d‐1 (0.455 kg NH4+‐N m‐3 d‐1). COD and NH4+‐N removal efficiencies reached 97.1–97.9% and 84.5–98%, respectively. As indicated from the PCR‐DGGE results, the microbial community and dominant species in the AGS also gradually evolved along with the increase of influent loads. A coincidence was observed, namely, three main distinct clusters of the phylogenetic tree appeared respectively in the three stages of influent loads. The microbial diversity attained a maximum in the medium loads stage. The identified bacteria mainly belonged to Proteobacteria, Actinobacteria, Bacteroidetes and Firmicutes. The dominant species were responsible for the AGS stability and pollutant removal. CONCLUSION Variation in the influent load strongly affected the microbial community dynamics, and hence the AGS performance. These results and understanding could lead to potential improvements in guiding AGS wastewater treatment. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Identification Of Dominant Species In the Agsmentioning

confidence: 99%

Section: Identification Of Dominant Species In the Agsmentioning

confidence: 99%

See 2 more Smart Citations

Effects of influent loads on performance and microbial community dynamics of aerobic granular sludge treating piggery wastewater

Chen

Huang

Tian

et al. 2017

J of Chemical Tech & Biotech

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“…An MEC based approach was done at the applied voltage of 0.80 V that suggested eventual slow down on nitrate removal due to substrate competition in heterotrophic system [12]. Zhu et al [13] coupled hydrogen synthesis with denitrification aiming at improvement of autotrophic, hydrogenotrophic denitrification in a three-chambered MEC. Both studies were based on the performance of BES inoculated with mixed culture.…”

Section: Introductionmentioning

confidence: 99%

Applied voltage optimization for denitrification process improvement by denitrifying species of Pseudomonas in microbial electrolysis cell (MEC)

et al. 2018

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Denitrification is the conversion process of nitrate to gaseous nitrogen forms carried out by bacteria commonly referred to as denitrifiers. Microbial Electrolysis Cell (MEC) is a type of bioelectrochemical system (BES) that is connected to external power source to aid the reactions. This research investigates the effect of applied voltage value on denitrification by nitrate removal efficiency of two model denitrifying species from the genus Pseudomonas in single-chambered MEC. Pseudomonas aeruginosa and Pseudomonas nitroreducens exhibited native removal efficiency at 70.62% and 68.20%, respectively. These values respectively reached up to 89.67% and 88.58% at 1.20 V, the upper limit of this study. Pseudomonas aeruginosa displayed better performance in MEC based off its produced current stability (mA) across the 0.35-1.20 V range. The effect of applied voltage on nitrate removal efficiency and setup performance was more prominent on known exoelectrogenic species of Pseudomonas such as Pseudomonas aeruginosa compared to Pseudomonas nitroreducens. Operating applied voltages of 0.35 V and 0.70 V was recommended for the application of the system based on technical and economical considerations. Further studies are needed to determine the response of the bacteria on wider range of applied voltages in MEC as well as elucidating these effects on autotrophic systems.

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Hydrogen‐Mediated Electron Transfer in Hybrid Microbial–Inorganic Systems and Application in Energy and the Environment

Xiu

Yao

et al. 2019

Energy Tech

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The conversion of electrical energy to chemical energy is a promising approach to store and utilize renewable electricity. Hybrid microbial–inorganic systems incorporating abiotic catalysts with biocatalysts have been proved to efficiently achieve this conversion. To couple electrocatalytic reactions with microorganism metabolism, H2 can be an ideal mediator for energy and electron transfer between electrodes and microorganisms. In hydrogen‐mediated hybrid microbial–inorganic systems, H2 is produced at the cathodes with abiotic hydrogen evolution reaction catalysts. H2 then functions as an energy carrier and electron donor for hydrogen‐oxidizing microorganisms. Hybrid microbial–inorganic systems have been prevalently used for energy and environmental applications. Herein, the principle, applications, and current challenges of the hybrid microbial–inorganic systems are summarized.

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Enhanced denitrification at biocathode facilitated with biohydrogen production in a three-chambered bioelectrochemical system (BES) reactor

Cited by 96 publications

References 39 publications

Effects of influent loads on performance and microbial community dynamics of aerobic granular sludge treating piggery wastewater

Effects of influent loads on performance and microbial community dynamics of aerobic granular sludge treating piggery wastewater

Applied voltage optimization for denitrification process improvement by denitrifying species of Pseudomonas in microbial electrolysis cell (MEC)

Hydrogen‐Mediated Electron Transfer in Hybrid Microbial–Inorganic Systems and Application in Energy and the Environment

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