为探究进水氨氮（NH₄⁺-N）对颗粒污泥生物除磷的影响，构建了序批式反应器（SBR），在中温条件下考察了进水 NH₄⁺-N对生物除磷颗粒污泥的特征及其污染物去除规律的影响。结果表明，进水NH₄⁺-N质量浓度为40 mg/L时，颗粒污泥沉降性能最好、生物量最大，稳定运行期污泥体积指数（SVI）为52.9 mL/g，总悬浮固体（TSS）质量浓度达到5.7~5.9 g/L，显著高于其他组别。粒径分析表明，适当提高NH₄⁺-N质量浓度利于颗粒污泥粒径增大，且当进水NH₄⁺-N质量浓度为40 mg/L时，0.8~1.2 mm粒径占比升高至34.6%。进水NH₄⁺-N能影响颗粒污泥胞外聚合物的质量分数及组分，当进水NH₄⁺-N质量浓度为40 mg/L时，EPS质量分数可高达134 mg/g，而NH₄⁺-N质量浓度升高提高了EPS内蛋白质（PN）与多糖（PS）的比值。进水NH₄⁺-N能影响颗粒污泥对TP、NH₄⁺-N及化学需氧量（COD）的去除效率。当进水NH₄⁺-N质量浓度为40 mg/L、颗粒污泥稳定运行时，TP、NH₄⁺-N及COD的去除效率可分别达到95.8%~96.4%、95%和94.6%~95.6%。

In order to explore the effect and mechanism of influent ammoniacal nitrogen (NH₄⁺-N) on biological removal of phosphorus by granular sludge,sequencing batch reactors (SBRs) are constructed to investigate the sludge characteristics and pollutant removal rules of biological phosphorus removal granular sludge under the influence of influent NH₄⁺-N at medium temperature.Results illustrate when the influent NH₄⁺-N concentration is 40 mg·L^-1,granular sludge exhibits the best sedimentation performance,the amount of biomass is the largest,sludge volume index (SVI) is 52.9 mL·g^-1,and total suspended solids (TSS) concentration is 5.7-5.9 g·L^-1,which are significantly higher than other groups.Particle size analysis indicates that properly increasing the concentration of NH₄⁺-N is beneficial to increase the particle size of granular sludge.When the influent NH₄⁺-N is 40 mg·L^-1,the proportion of granular sludge with a particle size of 0.8-1.2 mm increases to 34.6%.When the influent of NH₄⁺-N is 40 mg·L^-1,EPS content can reach 134 mg·g^-1.The ratio of protein (PN) to polysaccharide (PS) in EPS increases with the increase of NH₄⁺-N concentration.Influent NH₄⁺-N concentration can affect the removal efficiencies of TP,NH₄⁺-N and chemical oxygen demand (COD) by granular sludge.If the influent NH₄⁺-N concentration is 40 mg·L^-1 and granular sludge operates stably,the removal efficiencies of TP,NH₄⁺-N,and COD can reach 95.8%-96.4%,95% and 94.6%-95.6%,respectively.

刘容麟(1993-),男,硕士研究生,研究方向为水污染处理,1872406726@qq.com