ANAMMOX与反硝化协同作用及氮素负荷研究

向成功启动并稳定运行630 d后的UASB生物膜反应器系统连续添加有机物,分析其对厌氧氨氧化反应脱氮效果的影响,并进行氮素浓度负荷试验.在厌氧氨氧化反应器系统中连续投加有机COD(葡萄糖),系统运行稳定,有机COD(葡萄糖)存在对系统去除氮素能力影响不大,有机COD去除率达到92.0%,仅用23 d,在同一反应器系统中成功实现了厌氧氨氧化与反硝化协同作用脱氮.氮素浓度负荷试验阶段,进水氨氮(NH 4-N)、亚硝氮(NO-2-N)以及总氮(TN)浓度负荷分别从0.063 kg/(m3·d)和0.063 kg/(m3·d)和0.126 kg/(m3·d)提升到了0.239 kg/(m3·d)、0.315 kg/(m3·d)和0.554 kg/(m3·d),相应去除率分别为84.0%、93.0%和85.0%,厌氧氨氧化工艺的UASB生物膜反应器对氮素浓度负荷仍有很大提升空间.

Study of ANAMMOX-denitrification synergistic interaction and nitrogen loading

The UASB-biofilm reactor was started successfully and stably operated for 630 days, and which was added glucose as carbon source, the effectiveness of ANAMMOX process and nitrogen loading rate were studied. Continuous increasing organic COD (glucose) in ANAMMOX reactor system, the reactor operated stably, and over 92.0% of COD removal had achieved. The result indicated that COD in the influent had no important influence on the ANAMMOX process in UASB-biofilm reactor. It is found that within 23 days, the ANAMMOX-denitrification synergistic interaction was obtained in the same bio-reactor system. When the concentration of NH⁺₄-N, NO^-₂-N and TN were raised from 0.063 kg/(m³·d), 0.063 kg/(m³·d)and 0.126 kg/(m³·d) to 0.239 kg/(m³·d), 0.315 kg/(m³·d)and 0.554 kg/(m³·d), the NH⁺₄-N, NO^-₂-N and TN removal rates were 84.0%,93.0% and 85.0%,respectively. It suggested that the ANAMMOX process in UASB-biofilm reactor is suited for treating both low and high nitrogen concentration wastewater.