The Research On Adjustment Of Ammonia-Nitrogen Photocatalytic Processing Craft Based On Environment Risk Assessment Theory

Ammonia-nitrogen(NH₃-N) is one of the most common pollutants. Photocatalytic technique is newly arisen technique which could be used to treat NH₃-N wastewater in recent years. Because its operation is simple and moderate reaction condition and can make use of solar energy etc, it has been regarded to numerous researchers. Currently, the research of NH₃-N wastewater by photocatalytic treatment are still staying the stage that need look for the optimum NH₃-N degradation rate by changing reaction condition. The ebb and flow of process condition is judged according to NH₃-N degradation rate, and environment risks of NH₃-N degradation products are neglected. As a result, it has important meanings to the industrialization of photocatalytic technique on NH₃-N wastewater treatment by taking the environment risk of NH₃-N degradation products as the foundation of adjusting process conditions.Aiming at the current problem of photocatalytic treatment to NH₃-N wastewater, the effect of photocatalytic reaction condition on NH₃-N degradation products was summarized by a large amount of experiment data. Based on the nitrogen cycle model of natural water body, this paper...