The effect of varying COD/N ratio (1:1, 3:1, 5:1, 8:1, 10:1) of wastewater and intermittent aeration on treatment efficiency of biochar (BC)-packed (with 10% V/V biochar) vertical flow constructed wetland (VFCW), planted with Colocasia esculenta was assessed in this study. Three setups of VFCW were prepared in two sets: aerated (with an airflow rate of 1.0 ± 0.6 L min⁻¹ for 6 h d⁻¹) and non-aeration, and changes in COD, NH₄⁺-N, NO₃-N, TN, and TP (total phosphorous) in the effluent was investigated. In VFCWS with intermittent aeration, COD, NH₄⁺-N, NO₃-N, TP removal was 99.0, 97.0, 81.0, and 89.0%, significantly higher (p < 0.05) than non-aerated VFCW setups as 91.3, 70.9, 86.97 and 64.4%, respectively. In non-aerated VFCWs, BC addition in combination with plantation was advantageous in the nutrient removal process than setups without BC. COD/N ratio of wastewater did not show a significant impact on the working of VFCWs if amended with BC and intermittent aerations, suggesting slow adsorption rate and fast aerobic degradation of organic matter. The study suggests that oxygen supply management and BC addition in VFCWs could be an effective strategy to treat wastewater with a high organic load. Apart from that study results will be useful for refinement of the operational strategy with varying organic load.

废水的不同 COD/N 比（1:1、3:1、5:1、8:1、10:1）和间歇曝气对填充生物炭（BC）处理效率的影响（含 10% V/本研究评估了种植Colocasia esculenta 的V biochar) 垂直流人工湿地 (VFCW) 。VFCW 的三种设置分为两组：充气（气流速率为 1.0 ± 0.6 L min ^-1持续 6 h d ^-1）和非充气，以及 COD、NH ₄ ⁺ -N、NO ₃ -N 的变化研究了流出物中的 、TN 和 TP（总磷）。在间歇曝气的VFCWS中，COD、NH ₄ ⁺ -N、NO ₃ -N、TP去除率分别为99.0、97.0、81.0和89.0%，显着高于（p  < 0.05) 比非充气 VFCW 设置分别为 91.3、70.9、86.97 和 64.4%。在非曝气 VFCW 中，与没有 BC 的设置相比，添加 BC 与种植相结合在养分去除过程中具有优势。如果用 BC 和间歇曝气进行修正，废水的 COD/N 比对 VFCW 的工作没有显示出显着影响，表明吸附速率慢，有机物有氧降解快。该研究表明，VFCW 中的氧气供应管理和 BC 添加可能是处理高有机负荷废水的有效策略。除此之外，研究结果将有助于改进具有不同有机负荷的运营策略。