YULan,LIPeng-fei,ZHANGDa-fei,et al.Nitrite Accumulation Investigation and Control Strategies in Denitrifying Biofilter[J].China Water & Wastewater,2025,41(9):88-93.
反硝化生物滤池亚硝酸盐积累研究及管控实践
- Title:
- Nitrite Accumulation Investigation and Control Strategies in Denitrifying Biofilter
- Keywords:
- nitrite; denitrifying biofilter; methanol; backwash cycle; influent load; sodium acetate
- 摘要:
- 根据反硝化生物滤池脱氮运行时的NO2--N积累情况，从甲醇投配率、反冲洗周期、进水负荷、磷浓度、乙酸钠投配率角度进行试验，探究降低NO2--N积累量的管控措施。结果表明，当甲醇投配率在20~40 mg/L时，投配率越高，NO2--N积累越严重，最高可达6 mg/L以上；不同反冲洗周期以及磷浓度对反硝化菌群未产生明显影响，NO2--N积累仍较高；当进水负荷降至50%时，可有效增加脱氮停留时间，出水NO2--N稳定在2 mg/L左右，但需根据实际运行设定差异化的负荷配比；更换碳源为乙酸钠后，对NO2--N积累的缓解效果较好，最大积累量可控制在2~3 mg/L，可以作为NO2--N积累管控的有效措施。
- Abstract:
- According to the NO2--N accumulation observed in the denitrifying biofilter during operation, experiments were carried out from multiple perspectives, including methanol dosing rate, backwash cycle, influent load, phosphorus concentration, and sodium acetate dosing rate, to investigate effective control strategies for mitigating NO2--N accumulation. When the methanol dosing rate was in the range of 20-40 mg/L, a higher dosing rate resulted in more severe NO2--N accumulation, with the maximum level exceeding 6 mg/L. Different backwash cycles and phosphorus concentrations had no significant impact on the denitrifying bacterial community; however, the accumulation of NO2--N remained at a relatively high level. When the influent load was decreased to 50%, the residence time for nitrogen removal could be significantly enhanced, and the effluent NO2--N remained consistently below 2 mg/L. However, the differentiated load ratio should be determined based on actual operational conditions. After substituting the carbon source with sodium acetate, the accumulation of NO2--N was alleviated, and the maximum accumulation was maintained within the range of 2-3 mg/L. This approach can serve as an effective strategy for controlling NO2--N accumulation.
相似文献/References:
[1]冯仕训,张万里,程明涛,等.太湖流域一级保护区内某污水厂提标改造工艺设计[J].中国给水排水,2022,38(6):76.
FENGShi-xun,ZHANGWan-li,CHENGMing-tao,et al.Design of a Wastewater Treatment Plant Upgrading and Reconstruction Process in the First-grade Protection Zone of Taihu Lake Basin[J].China Water & Wastewater,2022,38(9):76.
[2]杨淇椋,宋凤鸣,古伟,等.反硝化生物滤池+高效气浮工艺用于准Ⅳ类提标改造[J].中国给水排水,2023,39(12):125.
YANGQi-liang,SONGFeng-ming,GUWei,et al.Application of Denitrifying Biofilter and High-efficiency Air Floatation in Upgrading of a WWTP for Quasi-Ⅳ Standard[J].China Water & Wastewater,2023,39(9):125.
[3]曾超,刘影,陈圆,等.某再生水厂两期脱氮除磷工艺设计及效能分析[J].中国给水排水,2024,40(18):64.
ZENGChao,LIUYing,CHENYuan,et al.Process Design and Efficiency Analysis of Nitrogen and Phosphorus Removal in Two Phases of a Reclaimed Water Plant[J].China Water & Wastewater,2024,40(9):64.
[4]李双菊,程瑞丰,柳佳然,等.后置反硝化滤池和活性炭接触池的提标工程设计[J].中国给水排水,2024,40(18):96.
LIShuang-ju,CHENGRui-feng,LIUJia-ran,et al.Upgrading Engineering Design of Post-denitrification Filter and Activated Carbon Contact Tank[J].China Water & Wastewater,2024,40(9):96.
[5]马俊,闫松,袁丙平,等.强化生物脱氮反应器处理煤气化及合成氨混合废水[J].中国给水排水,2025,41(16):112.
MAJun,YANSong,YUANBing-ping,et al.Enhanced Biological Nitrogen Removal Reactor for Coal-to-hydrogen and Synthetic Ammonia Wastewater Treatment[J].China Water & Wastewater,2025,41(9):112.
[6]李玉胜,白华清,孙政,等.MBBR+反硝化生物滤池+磁混凝沉淀池用于污水处理厂原位提标[J].中国给水排水,2026,42(4):108.
LIYusheng,BAI Huaqing,SUNZheng,et al.Upgrading In-situ by MBBR + Denitrifying Biofilter + Magnetic Coagulation Sedimentation Process in a Sewage Treatment Plant[J].China Water & Wastewater,2026,42(9):108.
[7]曹锋锋,徐明,王俊,等.基于响应面法优化O3+DNBF工艺强化脱氮研究[J].中国给水排水,2026,42(15):67.
CaoFengfeng,XuMing,WangJun,et al.Optimization of O3+DNBF Process for Enhanced Denitrification Based on Response Surface Methodology[J].China Water & Wastewater,2026,42(9):67.