HANXue-yi,WANGYi,WANGWen-huai,et al.Purification Efficiency and Effect on Plant Roots Microbial Community of Enhanced Floating Bed with Plant Carbon Source[J].China Water & Wastewater,2023,39(3):9-14.
Purification Efficiency and Effect on Plant Roots Microbial Community of Enhanced Floating Bed with Plant Carbon Source
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第3期
Page:
9-14
Column:
Date of publication:
2023-02-01
- Keywords:
- ecological floating bed; plant carbon source; landscape water; nitrate; microbial community
- Abstract:
- To solve the problem that traditional ecological floating bed (T-EFB) is not effective in removing nitrogen from the landscape water supplied with reclaimed water, the plant carbon source (PCS) was introduced to an ecological floating bed to construct PCS-EFB. The purification effects on the landscape water supplied with reclaimed water and plant roots microbial community of T-EFB and PCS-EFB were compared. Results showed that PCS-EFB could greatly enhance the removal of pollutants in water. The average removal rates of turbidity, TN, NO3--N, algae density and Chl-a concentration in PCS-EFB reached 46.52%, 62.24%, 92.84%, 57.51% and 63.86%, respectively. Meanwhile, the sustained release and good biodegradability of PCS could promote the denitrification process without increasing COD in water largely. Moreover, the addition of PCS could improve the microbial diversity, increase the relative abundance of functional bacteria such as Proteobacteria, Chloroflexi and Firmicutes, and then promote the removal and degradation of pollutants in water. Thus, the PCS-EFB is suitable for the purification of the landscape water supplied with reclaimed water, and it is a promising technology for removing nitrate in water, which helps to ensure water quality and control eutrophication.
Last Update:
2023-02-01