芽孢杆菌降解黑臭河道底泥的实验研究

Degradation of Sediments by Bacillus in Black and Odorous River

为研究芽孢杆菌投加到黑臭水体中不同位置对河道水体的修复效果,以某黑臭河道底泥和水体为研究对象,利用芽孢杆菌生物降解技术,分别将芽孢杆菌投加至底泥、泥水分界面、上覆水体3个不同位置,并测定相应指标进行分析。结果表明:芽孢杆菌投加至不同位置对黑臭水体均有修复效果,其中将芽孢杆菌投加至泥水分界面时对黑臭底泥和水体的修复效果最佳,此时对水体中氨氮、总氮、TP和COD的去除率分别为63.65%、42.71%、39.14%和63.13%,对底泥中氨氮、总氮、TP和有机质的去除率分别为59.88%、65.99%、59.07%和57.07%,底泥颜色由黑变黄,厚度下降18%,底泥生物降解能力增强。

Effects of adding Bacillus at different locations in a black and odorous river on sediment degradation were investigated. Bacillus was added to the sediment, sediment-water interface and overlying water, respectively, and corresponding indexes were determined and analyzed. Adding Bacillus at different locations all had remediation effects on black and odorous river. The best remediation performance was achieved when Bacillus was added to the sediment-water interface, the removal efficiencies of NH3-N, TN, TP and COD in the water were 63.65%, 42.71%, 39.14% and 63.13%, respectively, and the removal efficiencies of NH3-N, TN, TP and organic matter in the sediment were 59.88%, 65.99%, 59.07% and 57.07%, respectively. The color of the sediment changed from black to yellow, its thickness decreased by 18%, and its biodegradability also increased.