Enhanced nutrient removal from mixed black water by a microbial ultra-low weak electrical stimulated anaerobic-two stage anoxic/aerobic process

Song, Qijian; Liu, Hongbo; Meng, Qingchen; Zhou, Yanhong; Xu, Suyun; Lichtfouse, Éric; Chen, Zhongbing

doi:10.1016/j.cej.2022.134615

Cited by 11 publications

(4 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results showed an increase in aromatic amino acids and enhanced electron transfer under 0.2 V microbial weak electricity stimulation, which increased the denitrification rate to 98.1 %. In another study, a MFC was coupled with a MEC, and the MEC was stimulated in situ using ultra-low microbial weak electricity of 0.1 V generated by MFC (Qin et al 2022). Findings show the formation of aromatic proteins and the increase of tightly bound extracellular polymers involved in electron transfer, and the TN removal efficiency increased from 88.7 % to 91.3 %, thus revealing the activation of autotrophic microorganisms and the inhibition of some heterotrophic microorganisms.…”

Section: Coupling Of Multitype Bes-based Processes To Improve the Lac...mentioning

confidence: 99%

“…Therefore, sustainable technologies are needed to recover resources such as electricity and remove nitrogen from carbon-deficient wastewater to reduce greenhouse gases emissions. For ameliorating nitrogen removal in carbon-deficient wastewater, bioelectrochemical systems (BES) such as microbial fuel cells (MFC) and microbial electrolytic cells (MEC) are currently under intense research (Mier et al, 2021;Qin et al, 2022;Zhang et al, 2022).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review

Liu

Song

et al. 2023

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

Section: Coupling Of Multitype Bes-based Processes To Improve the Lac...mentioning

confidence: 99%

mentioning

confidence: 99%

Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review

Liu

Song

et al. 2023

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

“…Xanthomonadales belongs to the nutrient-poor microorganisms. It has strong self-coagulation capacity, is easy to grow on the solid surface of the film, and is usually in the form of biofilms [33], the presence of such microorganisms, can make the biofilm structure stable. It has been noted in the literature that Kouleothrix can use lignocellulosic materials for denitrification [34].…”

Section: The Microorganism In the Denitrificationmentioning

confidence: 99%

Agriculture Waste as Slow Carbon Releasing Source of Mixotrophic Denitrification Process for Treating Low C/N Wastewater

Hong¹,

Tang

Feng

et al. 2022

Separations

View full text Add to dashboard Cite

Mixotrophic denitrification has showed great potential for treating wastewater with a low C/N ratio. Mixotrophic denitrification is the process combining autotrophic denitrification and heterotrophic denitrification in one system. It can compensate the disadvantage of the both denitrifications. Instead of using sodium acetate and glucose as carbon source for the heterotrophic denitrification, agriculture solid wastes including rice straw (RS), wheat straw (WS), and corncob (CC) were employed in this study to investigate their potential as carbon source for treating low C/N wastewater. The carbon releasing pattern of the three carbon rich materials has been studied as well as their capacity in denitrification. The results showed that the highest denitrification occurred in the corncob system which was 0.34 kg N/(m3·d). Corncob was then selected to combine with sulfur beads to build the mixotrophic denitrification system. The reactor packed with sulfur bead on the top and corncob on the bottom achieved 0.34 kg N/(m3·d) denitrification efficiency, which is higher than that of the reactor packed with completely mixed sulfur bead and corncob. The autotrophic denitrification and heterotrophic denitrification were 42.2% and 57.8%, respectively. The microorganisms in the sulfur layer were Thermomonas, Ferritrophicum, Thiobacillus belonging to autotrophic denitrification bacteria. Kouleothrix and Geothrix were mostly found in the corncob layer, which have the function for fiber hydrolysis and denitrification. The study has provided an insight into agriculture solid waste application and enhancement on denitrification of wastewater treatment.

show abstract

“…In a previous study on potentiostatic BESs for treating low COD/N wastewater, although the external voltages were below 1.0 V, the max total nitrogen (TN) removal efficiency in the closed-circuit groups was approximately 3.5 times higher than that in the open-circuit group [ 5 ]. Additionally, Qin et al demonstrated that under a weak external voltage of 0.1 V, the TN removal reached 91.3% [ 6 ]. These findings indicate that the denitrification process is markedly enhanced under weak electric fields.…”

Section: Introductionmentioning

confidence: 99%

Effects of Weak Electric Fields on the Denitrification Performance of Pseudomonas stutzeri: Insights into Enzymes and Metabolic Pathways

Zhu,

Lin,

Sun

et al. 2024

Microorganisms

View full text Add to dashboard Cite

Enhanced denitrification has been reported under weak electric fields. However, it is difficult to investigate the mechanism of enhanced denitrification due to the complex interspecific interactions of mixed-culture systems. In this study, Pseudomonas stutzeri, capable of denitrification under anaerobic conditions, was selected for treating low COD/N (2.0, ratio between concentration of chemical oxygen demand and NO3−-N) artificial wastewater under constant external voltages of 0.2, 0.4, and 0.6 V. The results revealed that P. stutzeri exhibited the highest efficiency in nitrate reduction at 0.2 V. Moreover, the maximum nitrate removal rate was 15.96 mg/(L·h) among the closed-circuit groups, 19.39% higher than that under the open-circuit group. Additionally, a notable reduction in nitrite accumulation was observed under weak electric fields. Enzyme activity analysis showed that the nitrate reductase activities were significantly increased among the closed-circuit groups, while nitrite reductase activities were inhibited. Transcriptomic analysis indicated that amino acid metabolism, carbohydrate metabolism, and energy metabolism were increased, enhancing the resistance of P. stutzeri to environmental stress and the efficiency of carbon source utilization for denitrification. The current study examined the impacts of weak electric fields on enzyme activities and microbial metabolic pathways and offers valuable insights into the mechanism by which denitrification is enhanced by weak electric fields.

show abstract

Enhanced nutrient removal from mixed black water by a microbial ultra-low weak electrical stimulated anaerobic-two stage anoxic/aerobic process

Cited by 11 publications

References 56 publications

Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review

Bioelectrochemical systems for enhanced nitrogen removal with minimal greenhouse gas emission from carbon-deficient wastewater: A review

Agriculture Waste as Slow Carbon Releasing Source of Mixotrophic Denitrification Process for Treating Low C/N Wastewater

Effects of Weak Electric Fields on the Denitrification Performance of Pseudomonas stutzeri: Insights into Enzymes and Metabolic Pathways

Contact Info

Product

Resources

About