LIU Jie,YUAN Wen-jing,TANG Li,et al.Research on Improving Sensory Quality of River Water by Surface Flow Constructed Wetland[J].China Water & Wastewater,2021,37(1 1):95-101.
Research on Improving Sensory Quality of River Water by Surface Flow Constructed Wetland
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
1 1
Page:
95-101
Column:
Date of publication:
2021-01-01
- Keywords:
- river water; surface flow constructed wetland; chromaticity; transparency; sensory quality
- Abstract:
- River water was treated by a surface flow constructed wetland planted with yellow iris, and effect of water depth (25 cm, 45 cm and 65 cm) on water sensory quality improvement was explored. Effluent turbidity of yellow iris wetland decreased from 35 NTU to less than 5 NTU, chromaticity decreased from 23 degree to less than 1 degree, transparency increased from 35 cm to more than 160 cm, and the influent TN and TP were both effectively reduced. When water depth was 45 cm, the sensory quality of the wetland water was better, and the removal efficiency of nutrient was higher. Therefore, 45 cm was selected as the optimal water depth of the surface wetland. Under this water depth, water quality of the influent and effluent was analyzed by particle size analysis and threedimensional fluorescence analysis. It was found that the particle size range of the raw water was wider and the particle size was larger, but the particle size in effluent of the wetland was less than 1 100 nm. When the original chromaticity was high, fulvic acid and proteinoid in the raw water were high, and they could be effectively reduced in the wetland. Considering the results of particle size analysis and three-dimensional fluorescence analysis, 20 plants/m2 was chosen to be the optimal yellow iris planting density in this study.
Last Update:
2021-01-01