水生态修复技术在城市河道污染治理工程中的应用

本文以瑞安丰湖河生态修复工程为例,探讨了组合型生态修复技术在河道水环境治理领域的应用效果。该项目采用生态浮床、微孔曝气、微生物菌剂等多种生态技术相结合的模式对受污染的城市河道进行生态修复。河道中的污染物首先可作为生态浮床中挺水植物生长所需营养物质,挺水植物的根系则可为微生物提供优良的生长环境,微孔曝气则大幅度提升河道水体的溶解氧(DO)浓度,从而进一步改善水体的透明度,促进挺水植物的成长、增强微生物的活性,最终整体恢复河道生态系统并使其形成良性循环。运行结果表明,主要目标水质指标CODMn和DO的改善程度分别为28%和292%,水体清澈度和透明度大大增加,黑臭消失,水体感官明显改善。

Application of aquatic ecological restoration technology in urban river pollution control projects

Taking the ecological restoration project of Fenghu River in Ruian as an example, this paper discusses the application effect of combined ecological restoration technology in the field of river water environment treatment.In this project,ecological floating bed, microporous aeration, microbial agent and other ecological technologies are combined to repair the polluted urban river.The pollutants in the river can first be used as nutrients for the growth of emergent plants in the ecological floating bed.The roots of emergent plants can provide a good growth environment for microorganisms.Microporous aeration can greatly improve the DO concentration of the river water, thus further improving the transparency of the water, promoting the growth of emergent plants, enhancing the activity of microorganisms, and finally restoring the river ecology as a whole,and the system can be in a virtuous circle.The results show that the improvement degree of CODMn and DO are 28% and 292% respectively.The water clarity and transparency are greatly increased, the black odor disappears, and the water sense is obviously improved.