This study investigated the potential of thiosulfate-driven autotrophic enhanced floating treatment wetland (AEFTW) in removing nitrogen from the secondary effluent at the relatively short hydraulic retention times and low S/N ratios. Simultaneous autotrophic and heterotrophic denitrification was observed in AEFTW. The peak TN removal rate (15.3 g m^− 2 d^− 1) exceeded most of the reported floating treatment wetlands. Based on the kinetic model results, low mean temperature coefficient and high k₂₀ verified that the excellent performance in AEFTW diminished the microbial dependence on temperature. Nitrogen removal performance of enhanced floating treatment wetland (EFTW) and floating treatment wetland (FTW) were similar and highly sensitive to temperature. The interaction of sulfur transformation on the nitrogen, carbon uptake of plants was studied. Thiosulfate addition significantly raised sulfur content in the shoots and further enhanced the uptake of nitrogen and carbon, and increased the plant biomass at the same time. Higher composition of autotrophic and heterotrophic denitrifiers in AEFTW interpreted the occurrence of mixotrophic denitrification during summer. Thiosulfate induced mutual promotion of nitrogen removal by plant uptake and microbial denitrification in AEFTW.

这项研究调查了在相对较短的水力停留时间和低信噪比的情况下，硫代硫酸盐驱动的自养生物增强的漂浮处理湿地（AEFTW）在去除二次废水中的氮的潜力。在AEFTW中观察到同时发生了自养和异养反硝化作用。最高TN去除率（15.3  g  m ^{-  2}  d ^{-  1}）超过了大多数报道的漂浮处理湿地。根据动力学模型结果，平均温度系数低，k ₂₀高验证了AEFTW的优异性能可降低微生物对温度的依赖性。增强型漂浮处理湿地（EFTW）和漂浮处理湿地（FTW）的脱氮性能相似，并且对温度高度敏感。研究了硫转化对植物氮，碳吸收的相互作用。硫代硫酸盐的添加显着提高了芽中的硫含量，并进一步提高了氮和碳的吸收量，同时增加了植物的生物量。AEFTW中自养型和异养型反硝化剂的较高组成解释了夏季混合营养型反硝化的发生。硫代硫酸盐通过AEFTW中的植物吸收和微生物反硝化作用相互促进脱氮。