CHAIBao-hua,WANGYue-ning,HUANGXiao-zhong,et al.Impact of Temperature on Treatment of Low Nitrogen Concentration Wastewater Using an Anammox Biofilter[J].China Water & Wastewater,2025,41(7):89-94.
温度对厌氧氨氧化生物滤柱处理低氮废水的影响
- Title:
- Impact of Temperature on Treatment of Low Nitrogen Concentration Wastewater Using an Anammox Biofilter
- 关键词:
- 厌氧氨氧化生物滤柱反应器; 温度; 适应期; 厌氧氨氧化菌活性; 低氮废水
- Keywords:
- Anammox biofilter reactor; temperature; adaptation period; Anammox activity; low nitrogen concentration wastewater
- 摘要:
- 分析了厌氧氨氧化生物滤柱反应器 （ABFR） 在温度梯度下降过程的脱氮性能，研究了温度对沿程水质变化及厌氧氨氧化活性的影响，最后探讨了在（22±1） ℃下ABFR中功能微生物的群落分布。结果表明，在进水NH4+-N浓度为（47±3） mg/L、NO2--N浓度为（53±4） mg/L、水力停留时间（HRT）为1.5 h、氮负荷率为1.62 kg/（m3·d）的条件下，当ABFR从（31±1） ℃梯度下降至（22±1） ℃时，总氮去除率能够稳定在86%以上，出水氨氮和总氮浓度可达到排放标准。尽管如此，不同温度时反应器的适应期和厌氧氨氧化比活性（SAA）相差较大，温度越低则SAA越小，因而适应期越长。在（22±1） ℃时SAA约为0.84 mg/（gVSS·h）（以N计），而适应期为36 d，此时对温度适应性较强的Candidatus Brocadia和Candidatus Jettenia属于主导厌氧氨氧化菌。总之，ABFR具有缓解降温对系统冲击的能力，在温度为（22±1） ℃时能够获得稳定而良好的总氮去除效果，是一种颇有前景的低氮废水厌氧氨氧化处理装置。
- Abstract:
- The nitrogen removal performance of an Anammox biofilter reactor(ABFR) during a temperature gradient decrease was evaluated. The impact of varying temperatures on water quality and activity of Anammox along the flow path was investigated. Additionally, the microbial community of functional microorganisms within the ABFR at a stable temperature of (22±1) ℃ was analyzed. Under the conditions of influent NH4+-N of (47±3) mg/L, NO2--N of (53±4) mg/L, hydraulic retention time （HRT） of 1.5 hours, and nitrogen loading rate of 1.62 kg/(m3·d), the total nitrogen removal efficiency stabilized at over 86%, and the ammonia nitrogen and total nitrogen in the effluent complied with the limits specified in the discharge standard when the temperature was stepwise dropped from (31±1) ℃ to (22±1) ℃ in the ABFR. However, the adaptation period and specific Anammox activity (SAA) of the reactor exhibited significant variations at different temperatures. Specifically, as the temperature decreased, the SAA also diminished, consequently prolonging the adaptation period. At a temperature of (22±1) ℃, the SAA(calcultated by N) was approximately 0.84 mg/(gVSS·h), with an adaptation period of 36 days. The dominant Anammox bacteria were Candidatus Brocadia and Candidatus Jettenia, which exhibited strong adaptability to temperature variations. In conclusion, the ABFR demonstrated the capability to mitigate the adverse effects of temperature drop on the system and achieved a stable and high total nitrogen removal efficiency at temperature of (22±1) ℃. This makes it a promising Anammox treatment device for low nitrogen concentration wastewater.
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