Abstract
Effects of different electric field intensities on the anammox process were investigated. The results showed that the suitable electric field intensity could dramatically enhance the anammox growth rate and granule sludge stability under a higher nitrogen loading shock. The cellular yield and anammox amount of R2 (0.3 V/cm) was significantly enhanced by 186.48%, 183.79%, 146.51%, 131.26%, and 430%, 440.23% than that of R1 (control group), R3 (0.6 V/cm), and R4 (0.9 V/cm), with a nitrogen loading rate of 11.60 kg-N/(m3∙day). Besides, the electric field could stimulate cells to secrete more EPS to resist higher nitrogen loading shock. The protein (PN)/polysaccharide (PS) ratios of R2 were 22.22%, 16.44%, and 36% higher than those of R1, R3, and R4, which was beneficial to granule sludge stability. This study showed that electric field intensity could solve the problem of lower anammox growth rate and granule stability under a higher nitrogen loading shock.
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Acknowledgements
This research was financially supported by the Major Science and Technology Program for Water Pollution Control and Treatment (2013ZX07202-010) and the key research and development plan guidance plan project of Liaoning province(2019JH8/10300103).
Funding
This research was financially supported by the Major Science and Technology Program for Water Pollution Control and Treatment (2013ZX07202-010) and the Key Projects of Liaoning Provincial Department of Education (LJKZZ20220081).
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Chi Zhang: conceptualization, data curation, formal analysis, funding acquisition, project administration, and writing—original draft. Hongjv Sha: data curation, formal analysis, and methodology. Ze Lv: data curation and formal analysis. Xiaomin Hu: funding acquisition and resources, investigation, methodology, supervision, and writing—review and editing.
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Zhang, C., Sha, H., Lv, Z. et al. A Novel Strategy to Reduce the Higher Nitrogen Loading Shock on Anammox Growth Rate and Granule Sludge Stability. Water Air Soil Pollut 235, 182 (2024). https://doi.org/10.1007/s11270-024-06985-x
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DOI: https://doi.org/10.1007/s11270-024-06985-x