Method for improving denitrification performance of anaerobic ammonia oxidation system by adding biochar

Abstract

The invention relates to a method for improving the denitrification performance of an anaerobic ammonia oxidation system by adding biochar. The method comprises the following steps: 1, preparing sawdust biochar; 2, adding the wood chip biochar obtained in step 1 into an anaerobic ammonia oxidation biological denitrification system; and 3, after the matrix is consumed, recycling the biochar in the system. According to the invention, the electron transfer process of microorganisms is improved by using the oxidation-reduction characteristic of biochar, so that the conversion of nitrate nitrogen is promoted, the problem of nitrate nitrogen accumulation in the anaerobic ammonia oxidation system is successfully solved, the denitrification performance of the system is improved, and the efficient and stable operation of the system is realized. The biochar is prepared from waste biomass, and resource utilization of biomass waste can be achieved while efficient denitrification is achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for improving the denitrification performance of an anaerobic ammonium oxidation system by adding biochar. Background technique [0002] Compared with the traditional nitrification and denitrification process, the anammox process has the advantages of no need for external carbon source, no need to expose a large amount of air, and low infrastructure cost, which has become a research hotspot in the field of environmental protection. However, the application of the anammox process in sewage treatment still faces many challenges. On the one hand, due to the instability of the anammox process, the disturbance of external factors (such as temperature, aeration rate, nitrogen load changes, etc.) can easily cause The fluctuation of the reaction affects the formation and accumulation of nitrite nitrogen. On the other hand, the theoretical denitrification efficiency of an...

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Problems solved by technology

[0003] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for adding biochar to improve the denitrification performance of the anammox system, using the oxidation-reduction characteristics of biochar to improve the electron transfer process of microorganisms, and to promote the process of nitrate nitrogen removal. The reduction of nitrate nitrogen in the system successfully solved the problem of nitrate nitrogen accumulation in the system, thereby improving the denitrification performance of the anammox system

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