生物——生态复合修复技术在常州市黑臭河道治理中的应用

Application of Bio-Ecological Restoration Technology in Black and Odorous River Treatment in Changzhou City

常州市藻港西支河为一条非封闭性黑臭河道,采用深层微孔层流曝气、微生物强化降解和生态浮岛为主的生物—生态复合修复技术进行治理,对连续5个月的理化指标进行监测。结果表明,与治理前相比,治理后总磷、总氮、氨氮的浓度均显著下降,水质由劣Ⅴ类提升至Ⅲ~Ⅳ类;COD浓度降幅达70%;河道底泥厚度削减50%,底泥中的总氮、氨氮的含量总体呈下降趋势,其中部分检测点浓度降幅为50%。在改善水质的同时,以水生植物为主体的生态浮岛亦兼顾到城市河道的景观需求。

The west branch Zaogang River in Changzhou City is a non-closed black and smelly river.It is treated by integrated bio-remediation technology based on deep microporous laminar aeration,microbial enhanced degradation,and ecological floating island.The continuous monitoring of 5 months period shows that the concentration of total phosphorus,total nitrogen and ammonia has decreased significantly,and the water quality is improved from below classⅤto classⅢtoⅣ;COD is decreased by 70%,the thickness of sediment is reduced by half,and the total nitrogen and ammonia content in the sediment shows a downward trend in general,and the decrease at some areas reached 50%.While improving water quality,the ecological floating island with aquatic plants also meets the need of landscaping in urban rivers.