Electrochemically assisted sulfate reduction autotrophic denitrification nitrification integrated (e-SANI®) process for high-strength ammonium industrial wastewater treatment

Wu, Gaoming; Li, Zhongjian; Huang, Ying; Zan, Feixiang; Dai, Ji; Yao, Jun; Chen, Guanghao; Lei, Lecheng

doi:10.1016/j.cej.2019.122707

Cited by 43 publications

(12 citation statements)

References 44 publications

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“…-BER system decreased from 4.12 mg•L −1 to 2.29 mg•L −1 and from 4.06 mg•L −1 to 1.49 mg•L −1; the different C/N ratios also shifted from 0 to 1.5 and 2.5 to 3.5, and the average NH 3 -N concentration in the final effluent was 4.06 mg•L −1 to 1.49 mg•L −1 , while the C/N ratio was 1.5 to 3.5, in comparison to other techniques previously studied[27,42,43].…”

mentioning

confidence: 54%

“…It was found that in the 3D-BERs with GAC, biofilm was imbedded due to the abundance of microbial activity [40]. This was clearly observed in rod-shaped graphite anode and cathode, which was authentic and common in the other denitrification system [20,42]. There were also giant microbes found, which may be hydrogen-heterotrophic denitrifying bacteria.…”

Section: Biofilms Gac Samples Analysis By Semmentioning

confidence: 88%

“…Figure 3c,g. After 30 min, the nitrates concentration dropped rapidly, indicating a significant increase in denitrifying bacteria [19], and that the anoxic condition had been achieved [42]. It was observed that the removal efficiency of nitrogen increased with the amplified C/N ratios.…”

Section: Statistical Data Analysismentioning

confidence: 97%

“…Moreover, the NO3 − -N concentration in the final effluent was high when the ideal condition of the C/N ratio was 1.5-3.5, and the final concentration was 0.916 mg•L -1 -0.199 mg•L −1 as shown in Figure 3c,g. After 30 min, the nitrates concentration dropped rapidly, indicating a significant increase in denitrifying bacteria [19], and that the anoxic condition had been achieved [42]. It was observed that the removal efficiency of nitrogen increased with the amplified C/N ratios.…”

Section: Removal Performance and The Effects Of C/n Ratiosmentioning

confidence: 97%

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Effect of the C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater as Assessed by a Novel 3D-BER System

et al. 2020

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Emerging pollutants in the form of pharmaceuticals have drawn international attention during the past few decades. Ciprofloxacin (CIP) is a common drug widely found in effluents from hospitals, industrial and different wastewater treatment plants, as well as rivers. In this work, the lab-scale 3D-BER system was established, and more than 90% of the antibiotic CIP was removed from Low C/N wastewater. The best results were obtained with the current intensity being taken into account, and a different C/N ratio significantly improved the removal of CIP and nitrates when the ideal conditions were C/N = 1.5–3.5, pH = 7.0–7.5 and I = 60 mA. The highest removal efficiency occurred when CIP = 94.2%, NO3−-N = 95.5% and total nitrogen (TN) = 84.3%, respectively. In this novel system, the autotrophic-heterotrophic denitrifying bacteria played a vital role in the removal of CIP and an enhanced denitrification process. Thus, autotrophic denitrifying bacteria uses CO2 and H2 as carbon sources to reduce nitrates to N2. This system has the assortment and prosperous community revealed at the current intensity of 60 mA, and the analysis of bacterial community structure in effluent samples fluctuates under different conditions of C/N ratios. Based on the results of LC-MS/MS analysis, the intermediate products were proposed after efficient biodegradation of CIP. The microbial community on biodegrading was mostly found at phylum, and the class level was dominantly responsible for the NO3−-N and biodegradation of CIP. This work can provide some new insights towards the biodegradation of CIP and the efficient removal of nitrates from low C/N wastewater treatment through the novel 3D-BER system.

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mentioning

confidence: 54%

Section: Biofilms Gac Samples Analysis By Semmentioning

confidence: 88%

Section: Statistical Data Analysismentioning

confidence: 97%

Section: Removal Performance and The Effects Of C/n Ratiosmentioning

confidence: 97%

See 2 more Smart Citations

Effect of the C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater as Assessed by a Novel 3D-BER System

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It was found that in the 3D-BERs with GAC, biofilm was imbedded in the abundance of microbial activity [41]. It was clearly observed in rod-shaped graphite anode and cathode, which was authentic common in the other denitrification system [20,43]. There also existed huge microbes, which may be hydrogenheterotrophic denitrifying bacteria.…”

Section: Biofilms Gac Samples Analysis By Semmentioning

confidence: 95%

Effect of C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater by a Novel 3D-BER System

Hassan¹,

Zhu²,

Yang³

et al. 2020

Preprint

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Emerging pollutants as pharmaceuticals have been focusing international attention for few decades. Ciprofloxacin (CIP) is a common drug widely found in effluents from hospitals, industrial and different wastewater treatment plants, as well as rivers. In this work, the lab-scale 3D-BER system was established, and more than 90% of the antibiotic CIP removal from the Low C/N wastewater. Best results were obtained with current intensity, and different C/N ratio significantly improve the removal of CIP and nitrates, when the ideal conditions were; C/N = 1.5-3.5, pH =7.0-7.5, and I = 60 mA. The highest removal efficiency of CIP = 94.20 %, NO3--N= 95.53 % and total nitrogen (TN) = 84.27 %, respectively. In this novel system, the autotrophic-heterotrophic denitrifying bacteria played vital role for the removal of CIP and enhanced denitrification process. Thus, autotrophic denitrifying bacteria uses CO2 and H2 as carbon sources to reduce nitrates to N2. This system has the assortment and prosperous community revealed at the current intensity of 60 mA, and the analysis of bacterial community structure in effluent samples fluctuates under different condition of C/N ratios. According to the results of LC-MS/MS analysis, the intermediate products were proposed after efficient biodegradation of CIP. Microbial community on biodegrading was mostly found at phylum, and class level was dominantly responsible for the NO3--N and biodegradation of CIP. This work can provide some new insights towards the biodegradation of CIP and the efficient removal of nitrates from low C/N wastewater treatment by the novel 3D-BER system.

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Bioelectrochemical sulfate reduction enhanced nitrogen removal from industrial wastewater containing ammonia and sulfate

Ren

Zheng

et al. 2021

AIChE Journal

Self Cite

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Low organic carbon‐to‐nitrogen ratio and existing sulfate (SO42−) in industrial wastewater limited nitrogen removal. Coupling SO42− reduction with sulfide autotrophic denitrification provides a novel strategy. Herein, bioelectrochemical sulfate reduction was coupled with heterotrophic sulfate reduction to drive sulfide autotrophic denitrification. In this coupled system, total nitrogen (TN) removal efficiency was increased from ~25% to ~85% by inputting −45 mA electricity. With the help of supplying electrons to denitrification through SO42− reduction, coulomb efficiency was improved to 61.5%. Also, bioelectrochemical sulfate reduction could improve sulfur recovery and thus increase TN removal efficiency. Furthermore, through tuning turnover numbers of SO42−, high TN removal efficiency can be obtained at various concentrations of SO42−. Moreover, main functional bacteria in this system were identified. Finally, ~75% TN removal efficiency was achieved with real wastewater in this system. Overall, this work offered a new approach for efficient nitrogen removal from industrial wastewater containing SO42−.

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Electrochemically assisted sulfate reduction autotrophic denitrification nitrification integrated (e-SANI®) process for high-strength ammonium industrial wastewater treatment

Cited by 43 publications

References 44 publications

Effect of the C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater as Assessed by a Novel 3D-BER System

Effect of the C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater as Assessed by a Novel 3D-BER System

Effect of C/N Ratio on Biodegradation of Ciprofloxacin and Denitrification from Low C/N Wastewater by a Novel 3D-BER System

Bioelectrochemical sulfate reduction enhanced nitrogen removal from industrial wastewater containing ammonia and sulfate

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