How to solve the problem of nitrogen removal in the process of treating landfill leachate-Ocpuritech

How to solve the problem of nitrogen removal in the process of treating landfill leachate?

by:Ocpuritech     2021-05-12
How to solve the problem of nitrogen removal in the process of treating landfill leachate? Author: As we all know, the main features of leachate is high ammonia content, especially for buried landfill age 10 years or more, which value is usually as high as ammonia 3000 ~ 4000 mg / L, and even in some places up to 5000 mg / Above L, today the editor will take you to see how to solve the problem of denitrification in the process of treating landfill leachate. 1. Nitrification and denitrification biological denitrification has the advantages of good denitrification effect and stable operation. The disadvantage is that a large amount of carbon source needs to be added, resulting in a substantial increase in operating costs. Moreover, the concentration of total nitrogen in the effluent is relatively high, and it needs to be supplemented with advanced treatment to make the total nitrogen discharge up to standard. Especially some aging landfills need to add a large amount of carbon source, and the cost is much higher than the cost of leachate treatment itself. Therefore, it is not a good method for leachate treatment projects where the treatment cost is inherently high. 2. Ammonia stripping is characterized by high denitrification efficiency, which can effectively reduce the load of subsequent biological denitrification and ensure that the leachate treatment meets the discharge standards. The disadvantage is that a large amount of lime needs to be added in the ammonia stripping process, the transportation, storage and use of lime will pollute the surrounding environment, and the ammonia stripped off needs to be recovered, and the disposal of the recovered ammonium sulfate is also a difficult point. 3. Membrane denitrification Membrane denitrification (mainly reverse osmosis) removes ammonia nitrogen, and uses reverse osmosis membrane to intercept ammonia nitrogen to achieve the purpose of removing ammonia nitrogen. However, the concentrated liquid produced by reverse osmosis still contains a large amount of organic matter and ammonia nitrogen. The content of how to solve the problem of nitrogen removal in the process of treating landfill leachate has been introduced for you today, and I hope it will be helpful to you. At present, the energy consumption of the leachate treatment projects in operation in my country is generally high, and there are many problems in the treatment process. To solve the existing problems, it is necessary to increase the leachate treatment rate, save energy consumption, and develop new processes.
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