High-frequency measurement of N2O emissions from a full-scale vertical subsurface flow constructed wetland

摘要

In the last few years, the emission of nitrous oxide (N2O) from constructed wetlands has become a topic of increased interest. Most N2O emission measurements made so far are based on limited grab-samples, leading to sparse temporal resolution in the data. Using a high sampling frequency strategy, gaseous and dissolved N2O emissions from a two-stage vertical subsurface flow constructed wetland, treating domestic raw wastewater, were investigated. The monitoring period that lasted 3 weeks corresponded to an entire operation cycle of the filters including the feeding and rest periods.