SHENHao-nan,ZHANGQian,WANGHong-yu,et al.Effect of Organic Matter on Nitrogen Removal of Municipal Wastewater by Anammox Process with Different Fillers[J].China Water & Wastewater,2025,41(13):1-9.
有机物浓度对主流厌氧氨氧化工艺脱氮性能的影响
- Title:
- Effect of Organic Matter on Nitrogen Removal of Municipal Wastewater by Anammox Process with Different Fillers
- Keywords:
- municipal wastewater; Anammox; organic matter; biofilm; biochar
- 摘要:
- 利用两套上流式厌氧污泥床（UASB）反应器（R1和R2），分别构建聚氨酯和生物炭填料的泥膜复合系统，探究其在低氮负荷（NH4+-N=50 mg/L，NO2--N=60 mg/L，HRT=9 h）条件下的厌氧氨氧化性能。结果表明，两系统均成功启动了厌氧氨氧化反应器。投加有机物后，R1的总氮（TN）去除率稳步提升至69.88%，而R2的TN去除率从67.61%降至55.16%。15N稳定同位素示踪试验结果表明，R1的厌氧氨氧化活性显著高于R2。两反应器中胞外聚合物（EPS）的主要成分为酪氨酸和色氨酸。微生物分析发现，优势厌氧氨氧化菌属为Candidatus_Brocadia和Candidatus_Jettenia。投加有机物后，R2中反硝化菌（如Denitratisoma和Thauera）的相对丰度显著增加，推测与生物炭促进反硝化菌增殖有关，该变化使得厌氧氨氧化菌的活性受到抑制。
- Abstract:
- In this study, two sets of upflow anaerobic sludge bed (UASB) reactors (R1 and R2) were used to construct a sludge-biofilm composite system with polyurethane and biochar fillers, respectively, and its Anammox performance was explore under low nitrogen loading conditions (NH4+-N=50 mg/L, NO2--N=60 mg/L, HRT=9 h) . The results showed that Anammox was successfully initiated in both systems. After adding organic matter, the TN removal rate of R1 reactor stably increased to 69.88%, while the TN removal rate of R2 reactor decreased from 67.61% to 55.16%. The results of 15N stable isotope tracer test showed that the Anammox activity of R1 was significantly higher than that of R2. The main components of extracellular polymeric substances (EPS) in the two reactors were tyrosine and tryptophan. Microbial analysis showed that Candidatus_Brocadia and Candidatus_Jettenia were the dominant Anammox genera. After adding organic matter, the relative abundance of denitrifiers (such as Denitratisoma and Thauera) in R2 increased significantly, which was speculated to be related to the proliferation of denitrifiers promoted by biochar, and this change affected the Anammox activity.
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