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基于人工湿地景观设计效果及不同人工湿地植物对污水处理效果考虑下,实验首次选择了梭鱼草+美人蕉+野菱+金鱼藻构成人工湿地植物组合,研究该湿地植物组合对不同含量畜禽废水去污效果和植物生理特性影响。结果表明,组合植物对畜禽废水的去除效果较好,HRT为3 d的NH3-N、COD、TP去除率分别为56.92%~88.85%、27.7%~82.47%、31.54%~70.83%,最高去除率分别为92.77%、92.88%、94.66%。1级动力学方程对废水COD、TP吸附过程和相关系数R2的拟合好于准2级动力学方程。4种植物叶片SOD、CAT、POD活性大致呈现出先升高再降低的趋势。低含量畜禽废水胁迫下,CAT酶敏感程度高,在清除过氧化物作用中占主导地位;高含量畜禽废水胁迫下,由POD酶和CAT酶共同启动保护机制,当胁迫程度减小,主要由CAT酶再次起主导作用。抗逆性强弱大小为梭鱼草>美人蕉>金鱼藻>野菱。
Based on the effect of artificial wetland landscape design and the effects of different constructed wetland plants on wastewater treatment, the artificial combination of barracuda and canna + Yehling + Houttuynia sinensis was selected for the first time to study the effects of different combinations of wetland plants on livestock wastewater Decontamination and plant physiological characteristics. The results showed that the combined plant had a good effect on removing livestock wastewater. The removal rates of NH3-N, COD and TP with HRT of 3 d were 56.92% -88.85%, 27.7% -82.47% and 31.54% -70.83% respectively, the highest The removal rates were 92.77%, 92.88%, 94.66% respectively. The first-order kinetic equation fits the quasi-second-order kinetic equation well for COD and TP adsorption of wastewater and the correlation coefficient R2. The activities of SOD, CAT and POD in four kinds of plants showed the trend of first increasing and then decreasing. Under the stress of low content of livestock waste water, the enzyme activity of CAT was high, which led to the elimination of peroxides. Under the stress of high content of livestock wastewater, the protective mechanism was activated by POD enzyme and CAT enzyme. When the degree of stress decreased, Mainly by the CAT enzyme once again play a leading role. The size of the resistance to the size of barracuda grass> Canna> Alga> Agar.