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June 4, 2026iScienceOpen Access

Organic composition of starch wastewater steers denitrifying microbiomes for enhanced nitrogen removal

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Authors

XGXiaoya GuoNanjing University of Posts and TelecommunicationsLYLiang YuChinese Research Academy of Environmental SciencesHYH H YanChinese Research Academy of Environmental Sciences

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Overview

Randomized trial investigates nitrogen removal in municipal wastewater using corn starch wastewater supplements, suggesting effective recycling methods.

Key Points

  • This research aims to assess the role of starch wastewater as a carbon source in improving nitrogen removal through denitrification.
  • Two-stage wastewater types assessed: hydrolysis acidification (HAW) and vertical flow sedimentation (VSW).
  • Nox-N reduction rates measured during two phases: a rapid phase and a subsequent nitrite reduction phase.
  • EEM-PARAFAC and nir-gene profiling used to evaluate microbiome dynamics and denitrification performance.
  • Rapid NOx-N reduction rates of 15.91 mg N g−1 MLVSS h−1 for HAW and 18.04 mg N g−1 MLVSS h−1 for VSW observed.
  • During nitrite reduction, rates decreased to 3.57 mg N g−1 MLVSS h−1 for HAW and 8.02 mg N g−1 MLVSS h−1 for VSW.
  • Stability maintained with low effluent nitrate and limited nitrite accumulation over 30 days.

Cite This Study

Guo et al. (2026) studied this question.

synapsesocial.com/papers/6a2116cfd499ed480b16fc6ehttps://doi.org/10.1016/j.isci.2026.116217
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