独角莲对城市垃圾渗滤液有机物降解效应研究

Research on the Effects of Typhonium giganteum on the Organic Degradation of Urban Landfill Leachate

[目的]研究植物独角莲对城市垃圾渗滤液中有机物的修复效果。[方法]通过对渗滤液进行不同浓度的稀释和配合化学絮凝剂的处理,检测独角莲对渗滤液的重要有机物衡量指标COD(化学需氧量)、BOD(五日生化需氧量)及NH3-N(氨氮)的降解效应。[结果]独角莲具有在滤液中生长迅速、抗性强和降解效率高的特性,但在100%渗滤液原液(RL)与100%处理后的渗滤液(TL)处理下,由于渗滤液毒性较强,植物在此浓度下的修复效果有限;化学絮凝剂FeCl3处理和独角莲的共同作用可以有效降低较高浓度的渗滤液中的BOD和COD浓度,且TL中的NH3-N含量下降也更显著。[结论]该研究为利用植物处理垃圾渗滤液提供了一个良好的备选材料。

[Objective]The research aimed to study the remediation effect of Typhonium giganteum on the organic matter of landfill leachate.[Method] Through treatment of leachate dilution and combination with the chemical flocculants,the remediation effects of Typhonium giganteum on important organic matter parameters containing COD,BOD and NH3-N in leachate were analyzed.[Result] Typhonium giganteum had the characters of fast growing,high resistance and high degradation capability,but showed the low remediation effection under 100％ raw leachate and 100％ treated leachate condition because of strong toxicity of leachate.Method of combination of FeCl3 and Typhonium giganteum could reduce the contents of BOD and COD in high concentration leachate,and NH3-N content significant reduced.[Conclusion] The study provides a good candidate plant for leachate bioremediation using plant.