三级串联人工快渗系统处理高氨氮生活污水运行参数的优化

目的]进一步优化三级串联人工快渗系统处理高氨氮生活污水的运行参数。方法]以校园学生生活区高氨氮生活污水为研究对象,从水力负荷、湿干比以及水力负荷周期等方面,通过模拟柱试验确定其最佳运行参数。结果]最佳运行参数为水力负荷1.0m/d,湿干比为1∶5,水力负荷周期为4 h,出水COD、NH4-N的浓度均能满足《城镇污水处理厂污染物综合排放标准》（GB18918-2002）一级A标准。碳源不足是影响三级串联人工快渗系统脱氮效率较低的主要限制因子。缩短水力负荷周期,可以有效增加系统的复氧效率,提高系统对COD、NH4-N的好氧生物降解效率。结论]该研究为三级串联人工快渗系统的实际工程应用奠定了理论基础。

Optimization of the Operating Parameters of Three-step Series Constructed Rapid Infiltration System for Treating High Ammonia Nitrogen Domestic Sewage

Objective]The research aimed to further optimize the operating parameters of three-step series constructed rapid infiltration system for treating high ammonia nitrogen domestic sewage.Method]Taking high ammonia nitrogen domestic sewage in the students′ living area in a university as the research objects,the optimum operating parameters were confirmed by the simulated column experiment from the aspects of hydraulic loading,flooding-drying ratio and the cycle of hydraulic loading.Result]The optimum operating parameters were as follows: the hydraulic loading was 1.0 m/d,the flooding-drying ratio was 1∶5,and the cycle of hydraulic loading was 4 h.The concentration of effluent COD and ammonia nitrogen could meet the standards of ClassⅠA of "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002)".The lack of carbon source was the main restricting factor that resulted in the inefficiency of denitrification by three-step series of rapid infiltration system.Reducing the cycle of hydraulic loading can increase the efficiency of oxygen recovery of the system effectively and improve the efficiency of the aerobic biodegradation of COD and NH4-N by this system.Conclusion]The research laid the theoretical foundation for the practical engineering application of three-step series constructed rapid infiltration system.