Rural sewage treatment facilitates nitrogen and phosphorus removal yet can be costly. To address this challenge, a cost-effective embedding material mainly consisting of heterotrophic nitrifying bacteria, activated alumina (AA), and a solid carbon source (HPMC) was applied to a tidal flow constructed wetlands (TFCWs); aimed at stable nitrogen and phosphorus removal under low carbon-to-nitrogen (C/N) ratios. The TFCWs could be shortened to 16 d of startup duration time compared with the control group; and improved the ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) removal efficiencies to 98 %, 93 %, and 68 %, respectively. Also, effluent NH4+-N, TN, and TP in the enhanced TFCWs could be stable at 0.52 ± 0.18, 1.23 ± 0.45, and 0.75 ± 0.25 mg/L, respectively. Microbial community analysis revealed that AA and HPMC were enriched Pseudomonas sp., which potentially accelerated the NH4+-N assimilation pathway and phosphate biological removal. Embedding materials-TFCWs can provide new solutions for integrated rural sewage technology.

中文翻译：

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通过在潮汐流人工湿地中嵌入异养硝化细菌和活性氧化铝来增强低碳氮比农村污水中营养物的去除


农村污水处理有利于脱氮除磷，但成本较高。为了应对这一挑战，将一种主要由异养硝化细菌、活性氧化铝（AA）和固体碳源（HPMC）组成的经济高效的嵌入材料应用于潮汐流人工湿地（TFCW）；旨在实现低碳氮（C/N）比下的稳定脱氮除磷。与对照组相比，TFCWs的启动持续时间可缩短至16天；氨氮（NH4+-N）、总氮（TN）和总磷（TP）去除效率分别提高到98%、93%和68%。此外，增强型 TFCW 中的出水 NH4+-N、TN 和 TP 分别稳定在 0.52 ± 0.18、1.23 ± 0.45 和 0.75 ± 0.25 mg/L。微生物群落分析表明，AA 和 HPMC 富含假单胞菌，可能加速 NH4+-N 同化途径和磷酸盐生物去除。嵌入材料-TFCW可以为农村污水综合技术提供新的解决方案。