How the subsurface wastewater infiltration systems with iron‑carbon micro-electrolytic substrate achieve high pollutants removal: A metabolomic view

Li, Yinghua; Peng, Linlin; Wang, Yiyan; Zhang, Yue; Su, Fei; Qian, Jie

doi:10.1016/j.jwpe.2023.104591

Cited by 2 publications

(3 citation statements)

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“…In recent years, many scholars have conducted extensive research to investigate the composition of soil substrates. Y. H. Li et al (2024) reported that iron (Fe)-C micro-electrolysis materials could effectively improve the N pollutant removal performance of SWIS, with the removal rates of TN and NH 4 + -N increased by 31.6% and 33.7%, respectively (Table 4). There are three potential mechanisms for the pollutant removal efficiency enhanced by Fe-C micro-electrolysis material: First, Fe-C micro-electrolysis provides electron donors, promoting denitrification and the decomposition of organic pollutants (Shen et al, 2019).…”

Section: Soil Substratementioning

confidence: 99%

“…Subsurface wastewater infiltration system (SWIS) is considered as an environmentally friendly, low construction and operation costs of decentralized sewage treatment scheme (Y. H. Li, Peng, Zhang, et al, 2023;Su et al, 2023). SWIS works by controlling sewage from the surface to a depth in soil with a specific structure and good diffusivity (Y. H. Li et al, 2024;. Sewage is effectively dispersed throughout the soil substrate by capillary infiltration, while synergistic interactions among plants, soil, and microbial collaboratively facilitate sewage purification (Y. H. Li et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

“…Similar to the widely utilized subsurface flow constructed wetlands, SWIS is also a proficient method for sewage treatment, with some variations in design and functionality (Y. H. Li et al, 2024;Vymazal, 2011). Constructed wetlands are engineered systems that replicate natural wetland processes, typically consisting of shallow basins or river channels filled with wetland vegetation, soil, and other substrate materials.…”

Section: Introductionmentioning

confidence: 99%

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Subsurface wastewater infiltration systems for nitrogen pollution control

Zhou,

Li,

Wang

et al. 2024

Water Environment Research

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Subsurface wastewater infiltration systems (SWISs) are suggested to be a cost‐effective and environmentally friendly method for sewage treatment. However, a comprehensive summary of the relevant mechanisms and optimization methods for nitrogen (N) removal in SWIS is currently lacking. In this review, we first summarize the N transformation mechanisms in SWIS. The impact of operational parameters on the N removal efficiency is then delineated. To enhance pollutant removal and minimize resource wastage, it is advisable to maintain a wet–dry ratio of 1:1 and a hydraulic loading rate of 8–10 cm/day. The organic load should be determined based on influent characteristics to optimize the balance between sewage treatment and nitrous oxide (N2O) emission. Finally, various strategies and modifications have been suggested to enhance pollutant removal efficiency and reduce N2O emissions in SWIS, such as artificial aeration, supply electron donors, and well‐designed structures. Overall, greater emphasis should be placed on the design and management of SWIS to optimize their co‐benefits while effectively controlling N pollution.Practitioner Points SWISs are often considered black boxes with their efficiency depending on hydraulic characteristics, biological characteristics, and substrate properties. Biological nitrification coupled with denitrification is considered to be the major N removal process. Increasing the reduction of N2O to the inert N2 form is a potential mechanism to mitigate global warming. Strategies such as artificial aeration, supply electron donors, and well‐designed structures are suggested to improve N removal performance.

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Section: Soil Substratementioning

confidence: 99%