Study on Soil Leaching Risk of Reuse of Reclaimed Fertilizer from Micro-Flush Sanitary Wastewater

In view of the potential soil leaching risk reuse fertilizer reclaimed from micro-flush sanitary wastewater, batch tests adsorption and degradation, column percolation test multi-stage box were adopted. The characteristics leachate after interaction between soil, as well changes attributes in system, analyzed. After obtaining correlation coefficients solute transport through above experiments, HYDRUS-1D model was constructed to simulate migration transformation with a duration 1 year thickness 5 m. impacts on groundwater results showed that intensity total ammonia nitrogen (TAN) (1n=0.8009) tested lower than chemical oxygen demand (COD) (1n=1.1830). HYDRUS prediction concentrations TAN COD at depth m 0, while (TN) still had concentration 0.11 mg/L. However, TN into deep mainly came itself. 3.4 an upward trend period. addition, can expand nutrient inventory, which is conducive improvement fertility. It be concluded not significant short term (one year). fertilization high-nitrogen background value should paid attention long term.