Abstract
Although micro-organisms play a significant role in pollutant removal in constructed wetlands, little is known on the effect of wastewater-quality properties on microbial characteristics. In this study, two groups of integrated vertical-flow constructed wetland microcosms were applied to treat synthetic domestic wastewater and synthetic secondary effluent. The effects of wastewater-quality properties on microbial features were assessed. Results showed that higher values of microbial indicators were observed in the systems with domestic wastewater and in down-flow cells. Redundancy analysis revealed that organic matter concentration and temperature were two critical determinants influencing the microbial features.
Acknowledgments
This work was supported by grants from Key Project of the National Twelfth-Five Year Research Program of China (2012BAD25B05-02), Major Science and Technology Program for Water Pollution Control and Treatment (2011ZX07303-001), National Natural Science Foundation of China (51179184, 51408593, 41272272).