School of Resources and Civil Engineering, Northeastern University, Shenyang 11004, China E-mail: liyinghua1028@126com.
Water Sci Technol. 2021 May;83(10):2309-2326. doi: 10.2166/wst.2021.155.
Subsurface wastewater infiltration (SWI) is an environmentally friendly technology for the advanced treatment of domestic sewage. Clogging (including physical, chemical and biological clogging) of the porous medium not only directly reduces the hydraulic load (treatment efficiency), but also reduces the service life. Although clogging has become one of the key issues discussed in several reports, there are still several gaps in understanding, especially in its occurrence process and identification. SWI clogging causes, development process and solutions are different from those of constructed wetlands. This article quotes some reports on constructed wetlands to provide technical ideas and reference for revealing SWI clogging problems. Based on the analysis of the clogging genesis, this review gathers the main factors that affect the degree of clogging, and new methods for the identification of clogging conditions. Some preventive and unclogging measures/strategies are presented. Finally, it is suggested that to effectively alleviate the clogging phenomenon and extend the service life, priority should be given to the comprehensive analysis of wastewater quality and solid constituents accumulated in the pores. Then, the effectiveness of in-situ strategies, such as alternating operation will be the main focuses of future research.
地下污水渗透（SWI）是一种用于生活污水深度处理的环保技术。多孔介质的堵塞（包括物理、化学和生物堵塞）不仅直接降低了水力负荷（处理效率），还降低了使用寿命。尽管堵塞已成为几个报告中讨论的关键问题之一，但仍存在一些理解上的差距，特别是在其发生过程和识别方面。SWI 堵塞的原因、发展过程和解堵方法与人工湿地不同。本文引用了一些关于人工湿地的报告，为揭示 SWI 堵塞问题提供了技术思路和参考。本文基于堵塞成因的分析，收集了影响堵塞程度的主要因素，并提出了新的堵塞状况识别方法。提出了一些预防和疏通堵塞的措施/策略。最后建议，为了有效缓解堵塞现象，延长使用寿命，应优先综合分析污水水质和孔隙中积累的固体成分。然后，原位策略的有效性，如交替运行将是未来研究的主要关注点。
