The Degradation Regulation and Numerical Simulation of Ammonia Nitrogen in Semi-Aerobic Landfilling Leachate

Abstract

The semi-aerobic landfill and anaerobic landfill simulation experimental devices were constructed. The leachate that lay at the bottom and space horizon of two landfilling devices was sampled periodically, and the content of ammonia nitrogen (Recorded as C(NH3-N)) was determined. Based on the monitoring data of the leachate that were located at bottom of devices in the 69 th week, the rule of C(NH3-N) that came from the bottom of the two landfilling devices with time change was simulated, and its reasons for the differences were compared and analyzed; the monitoring data of the upper, middle and lower C(NH3-N) were processed during the stable operation phase of waste degradation by using Sufer and Excel software, then the spatial variability and differences of leachate C(NH3-N) of two landfilling devices were discussed. The experimental results indicated that the content of leachate C(NH3-N) that located at upper, middle and lower layers as well as the bottom of semi-aerobic landfill were lower than the corresponding layer of the anaerobic landfill. Compared with the structure of anaerobic landfill, the semi-aerobic landfill structure could accelerate the balance and stability process of leachate C(NH3-N), and the content of leachate C(NH3-N) was reduced effectively.