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- Title
CONSTRUCTION AND APPLICATION OF CONTROL INDICATORS FOR DRY AND WET ALTERNATING ARTIFICIAL WETLAND SYSTEM.
- Authors
ZHU, J.; CHEN, X. Y.; LU, J. J.; WANG, Z. X.; ZHANG, X. Y.
- Abstract
Dry and wet alternation is one of the most common aquatic ecological processes in nature. The alternation of water content is coupled with the cycling process of nutrients, which has a significant impact on the migration and transformation of nitrogen. Based on the concept of dry wet alternation and system control, this article constructs a three-level system control index for artificial wetland dry wet alternation. By designing dry and wet alternation (DWA) experiments in artificial wetlands, aerobic/anaerobic environment of natural wetlands is simulated, the regulation of wetland operating parameters (time T, water level H) was systematically studied, as well as the response relationship between key control parameters (pH, DO, carbon source) and nitrogen removal in wetlands. Under the influence of dry wet alternation in artificial wetlands, there is a significant correlation (P < 0.05) between the secondary indicators such as DO, pH, and TOC in each substrate and the dry wet alternation time (4 h, 8 h, 12 h) (primary indicators) to varying degrees (P < 0.05). Moreover, factors such as DO, pH, and TOC in various matrices have varying degrees of correlation with NH3-N, NO3-N, ON, and TN removal rates (tertiary indicators) (P < 0.05). By studying the control indicators of the three-level system of dry wet alternation established in this article, a technical basis is provided for achieving the effect of systematic regulation of the dry wet alternation operation of artificial wetlands.
- Subjects
CONSTRUCTED wetlands; WETLANDS; WATER levels; NUTRIENT cycles
- Publication
Applied Ecology & Environmental Research, 2023, Vol 21, Issue 6, p6089
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/2106_60896104