Abstract:

In order to improve nitrogen removal efficiency, strengthen the denitrification treatment effect of waste water, based on extensive literature, the author concluded in-depth exploration of the major wetland nitrogen removal mechanism-nitrification nitrogen, analyzed the impacts of wetland removal efficiency of the main factors, summarized the status of wetland nitrogen, and proposed wetland denitrification research and research directions: improving dissolved oxygen, the optimum parameters such as temperature, pH and so on, increasing the number of microorganisms, development of efficient matrix, etc. The shortage was lack of discussing the other nitrogen technology, such as shortcut nitrification and denitrification, simultaneous nitrification and denitrification, also lack of discussion of nitrogen response model, still needed a large number of documents through the summary and the experiment which demonstrated the other nitrogen technology, proposed the nitrogen reaction model.