State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093, China.
Bioresour Technol. 2010 Mar;101(6):1693-700. doi: 10.1016/j.biortech.2009.10.002. Epub 2009 Oct 23.
The performance response of planted and the unplanted wetlands to simulated wastewater with different ratios of carbon to nitrogen (C/N) was studied during a 9-month period in greenhouse conditions. With different C/N ratios for influent water (C/N ratios 2.5:1, 5:1 and 10:1), average removal efficiencies for the unplanted and the planted wetlands were as follows: COD (41-52% and 59-68%), TN (24-48% and 25-62%), TP (35-64% and 59-71%) and TOC (22-37% and 16-33%). At C/N 5:1, both systems performed most efficiently for removal of COD and TP. However, high N removal efficiency only occurred when C/N ratio ranged 2.5-5. Both wetlands exhibited good capabilities of total organic carbon removal at C/N 10:1. Maybe, appropriate control of the carbon or nitrogen source concentration and C/N ratio in the influent can achieve the optimal effect of nutrients removal.
在温室条件下进行了为期 9 个月的研究，以探讨不同碳氮比（C/N）的模拟废水对种植湿地和未种植湿地的性能响应。采用不同的进水 C/N 比（2.5:1、5:1 和 10:1），未种植湿地和种植湿地的平均去除效率如下：COD（41-52%和 59-68%）、TN（24-48%和 25-62%）、TP（35-64%和 59-71%）和 TOC（22-37%和 16-33%）。在 C/N 比为 5:1 时，两种系统对 COD 和 TP 的去除均表现出最高的效率。然而，只有当 C/N 比在 2.5-5 之间时，才会出现高氮去除效率。两种湿地在 C/N 比为 10:1 时均表现出良好的总有机碳去除能力。也许，适当控制进水的碳源或氮源浓度和 C/N 比可以达到最佳的养分去除效果。
