Combined Remediation of Eutrophic Water in the Northern Foot of Qinling Mountains by Bacteria-Algae-Matrix Ecological Floating Bed

In this study, an urban landscape water body was taken as the research object, and the joint ecological restoration of eutrophic landscape water body was realized through two-stage laboratory simulated hydroponic experiments. Based on the screening of dominant floating bed plants and the optimization of floating bed matrix and ratio, a matrix ecological floating bed was constructed, and the purification effect and stability of the floating bed were enhanced by high-efficiency strains and dominant algae. In the first phase of the experiment, microbial agents were introduced into the matrix floating bed to construct a plant-matrix-loaded microbial combined ecological floating bed to realize the combined purification of eutrophic water bodies by plants-matrix-microorganisms. In the second phase of the experiment, the dominant algae was introduced to strengthen the combined repair effect, in order to achieve efficient treatment and repair of eutrophic landscape water. The results showed that the treatment effect of the constructed bacteria-algae-substrate ecological floating bed system was better than that of the traditional ecological floating bed and had certain ecological stability, indicating that it was feasible to use the dominant algae and microbial strains combined with the ecological floating bed for water treatment. The composite ecological floating bed system has the effect of strengthening the water purification efficiency and enhancing the stability of the floating bed, which is helpful to improve the treatment efficiency of sewage, increase the ecological diversity and enhance the impact resistance.