多介质地下渗滤系统脱氮影响因素及强化措施

与传统的污水处理工艺相比，地下渗滤在处理分散污水中具有天然的优势，因此逐渐受到了广泛关注与深入研究。地下渗滤对COD和TP的去除率较高，但较低的脱氮率有待加强。笔者通过详细介绍地下渗滤系统氧化还原电位、碳源、运行工况、外部环境等影响脱氮因素，系统地总结了地下渗滤强化脱氮的措施，并对今后的研究方向进行了展望。通过对影响因素进行权重排序，多种强化措施和作用联合应用，提升微生物功效等方法强化氮的去除率，旨在丰富系统除氮的理论内涵，拓展地下渗滤的应用空间。

Influencing Factors and Strengthening Measures of Nitrogen Removal in a Multi-media Subsurface Wastewater Infiltration System (SWIS)

Subsurface wastewater infiltration system (SWIS) has natural advantages in the treatment of decentralized wastewater compared with the traditional sewage treatment processes, and attracts extensive attention and deep research. The removal rates of chemical oxygen demand (COD) and total phosphorus (TP) are relatively higher by SWIS, while lower nitrogen removal rate needs to be improved. The influencing factors of nitrogen removal, such as oxidation reduction potential (ORP), carbon source, operation performance and external environment, were introduced in detail in this paper. The strengthening measures were also summarized, and the research direction was put forward in addition. Nitrogen removal rate could be strengthened by weight sequencing of influencing factors, combined application of multiple strengthening measures and functions, and the improvement of the performance of microorganisms, which could enrich the theory meaning of nitrogen removal and expand the application scope of the SWIS.