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Rural domestic sewage (RDW) economic and efficient nitrogen removal remains a challenging topic. This study established an anaerobic-oxic-anoxic sequencing batch reactor integrating partial nitrification (PN) and endogenous denitrification (ED) to treat RDW. When the average influent total inorganic nitrogen (TIN) was 53.8 mg/L, the effluent of it, nitrite accumulation ratio, and removal efficiency were 7.8 mg/L, 89.8%, and 85.7%. In the typical cycle, the nitrogen removal efficiency of PNED could reach 100%, ED is the main nitrogen removal pathway, which significantly enhanced the TIN removal from RDW. PNED provides novel solutions for high-level and energy-saving RDW treatment.

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Enhancing Nitrogen Removal from Rural Domestic Sewage via Partial Nitrification-Endogenous Denitrification (PNED) Process in the Anaerobic/Oxic/Anoxic Sequencing Batch Reactor

  • 会议论文

  • 发表日期：

    2025年

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  • Wentao Pan,
  • Hong Liu,
  • Yongzhi Chen

摘要

Rural domestic sewage (RDW) economic and efficient nitrogen removal remains a challenging topic. This study established an anaerobic-oxic-anoxic sequencing batch reactor integrating partial nitrification (PN) and endogenous denitrification (ED) to treat RDW. When the average influent total inorganic nitrogen (TIN) was 53.8 mg/L, the effluent of it, nitrite accumulation ratio, and removal efficiency were 7.8 mg/L, 89.8%, and 85.7%. In the typical cycle, the nitrogen removal efficiency of PNED could reach 100%, ED is the main nitrogen removal pathway, which significantly enhanced the TIN removal from RDW. PNED provides novel solutions for high-level and energy-saving RDW treatment.