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研究报告

陈重军,张敏,喻徐良,姜滢,汪瑶琪,徐乐中,沈耀良.基质浓度对ABR厌氧氨氧化反硝化脱氮除碳效能影响及动力学特征[J].环境科学学报,2018,38(9):3552-3560

The nitrogen/carbon removal and kinetic characteristics of ABR anammox reactor under different substrate concentrations

陈重军
1. 苏州科技大学环境科学与工程学院, 苏州 215009;2. 江苏高校水处理技术与材料协同创新中心, 苏州 215009;3. 江苏省环境科学与工程重点实验室, 苏州 215009;4. 江苏省厌氧生物技术重点实验室, 无锡 214122

徐乐中
1. 苏州科技大学环境科学与工程学院, 苏州 215009;2. 江苏高校水处理技术与材料协同创新中心, 苏州 215009;3. 江苏省环境科学与工程重点实验室, 苏州 215009

沈耀良
1. 苏州科技大学环境科学与工程学院, 苏州 215009;2. 江苏高校水处理技术与材料协同创新中心, 苏州 215009;3. 江苏省环境科学与工程重点实验室, 苏州 215009

摘要：采用厌氧折流板反应器（ABR）为研究对象，以一定COD、NH₄⁺-N和NO₂^--N比例增加进水基质浓度，以明确基质负荷提高对ABR厌氧氨氧化和反硝化协同体系脱氮除碳的影响，并通过基质去除模型获得反应器对基质的耐受程度.研究表明，ABR反应器能够实现厌氧氨氧化反硝化耦合脱氮除碳，当进水基质COD、NO₂^--N和NH₄⁺-N浓度从220、168和60 mg·L^-1提高至420、270和110 mg·L^-1时，反应器脱氮效能下降，COD、NO₂^--N、NH₄⁺-N和TN去除率分别为97%、94%、30%和78%，厌氧氨氧化对TN去除的贡献率从43.08%骤降至16.49%，反硝化脱氮贡献率从53.81%增至82.07%.动力学模型拟合发现，Stover-Kincannon模型（R²=0.937，TN；R²=0.975，COD）较一级基质去除模型（R²=0.314，TN；R²=0.016，COD）更适合评价反应器对基质的承受力；Stover-Kincannon模型表明，反应器对TN和COD的最大基质利用率分别为1.43 g·L^-1·d^-1和3.33 g·L^-1·d^-1，饱和常数（K_B）分别为1.2和3.79，研究认为ABR协同脱氮除碳体系理论上还有继续提升基质负荷的潜力.

Abstract：In order to identify the synergistic anammox and denitrification process in anaerobic baffled reactor (ABR), the concentrations of COD, NO₂^--N and NH₄⁺-N were controlled to investigate the effect of substrate concentrations on nitrogen and carbon removal. The results show that the removal efficiencies of COD, NO₂^--N, NH₄⁺-N and TN were about 97%, 94%, 30% and 78%, respectively when the influent COD, NO₂^--N, NH₄⁺-N concentrations were increased from 220, 168 and 60 mg·L^-1 to 420, 270 and 110 mg·L^-1. With the influent substrate concentrations increased, the contribution of Anammox to TN removal decreased from 43.08% to 16.49%,while the contribution of denitrification increased from 53.81% to 82.07%. The kinetic analysis results show the Stover-Kincannon model (R²=0.937,TN;R²=0.975,COD) is more appropriate than the First-order substrate removal model (R²=0.314, TN; R²=0.016, COD) to describe the tolerance of substrates on the system. The maximum TN and COD utilization rate obtained by Stover-Kincannon model was 1.43 g·L^-1·d^-1 and 3.33 g·L^-1·d^-1, while the saturation constant (K_B) was 1.2 and 3.79, respectively. Therefore, it is believed that the ABR, which acts as a synergistic denitrification and decarbonization system, has the potential of increasing the matrix load.

Key words：anaerobic baffled reactor (ABR) substrate concentration nitrogen and carbon removal ANAMMOX bacteria kinetic characteristics