State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, P.R. China.
Environ Sci Technol. 2010 Jul 1;44(13):5015-21. doi: 10.1021/es100514x.
A kinetic model for shortcut nitrification-denitrification process with sequencing batch reactor (SBR) was developed. To test this model, the kinetic parameters of the model including maximum specific rates and half-maximum rate concentrations for shortcut nitrification and denitrification were estimated from the results obtained from a laboratory-scale SBR fed with a soybean curd processing wastewater (400-800 mg COD L(-1), 50-65 mg NH(4)(+)-N L(-1)) at 26 degrees C. In the nitrification step, two DO levels (0.5 and 3.5 mg L(-1)) were tested and the predicated nitrification rates under different NH(4)(+)-N concentrations using this model fit well with correlation coefficient R = 0.9902. In the denitrification step, the process of nitrite removal was close to a zero-order reaction if the concentration of electron donor was not so low (COD > 100 mg L(-1)), and concentrations of nitrite and organic matter (as COD) had limited effect on denitrification rate. The model can be used to predict nitrogen removal performance with different influent NH(4)(+)-N and COD concentrations and under various DO concentrations.
建立了序批式反应器（SBR）短程硝化-反硝化动力学模型。为了验证该模型，通过实验室规模的 SBR 处理豆腐加工废水（400-800mg COD/L，50-65mg NH(4)(+)-N/L），在 26℃下，对模型中的动力学参数，包括短程硝化和反硝化的最大比速率和半最大速率浓度进行了估算。在硝化阶段，测试了两个 DO 水平（0.5 和 3.5mg/L），并使用该模型预测了不同 NH(4)(+)-N 浓度下的硝化速率，相关系数 R=0.9902。在反硝化阶段，如果电子供体的浓度不是很低（COD>100mg/L），则亚硝酸盐的去除过程接近于零级反应，亚硝酸盐和有机物（以 COD 计）的浓度对反硝化速率的影响有限。该模型可用于预测不同进水 NH(4)(+)-N 和 COD 浓度以及不同 DO 浓度下的脱氮性能。
