Operational optimization method for nitration and nitrosation processes

Abstract

The invention relates to an operational optimization method for nitration and nitrosation processes, and belongs to the technical field of wastewater biotreatment. The method comprises the following steps of: construction of a dynamic control system: according to parameters involved in a two-step nitration process of NH4+ / -N->NO2--N and NO2--N->NO3--N, establishing kinetic models of the nitrosation and nitration processes; according to characteristics of substance change, a reactor flow state and a reactor unit involved in the nitration process, establishing a material balance equation set of the whole nitration process; in combination with the kinetic models and the material balance equation set, constructing the dynamic simulation control system for the simulated nitration process; and simulation operation: obtaining the parameters involved in the nitration process in the kinetic models of the nitrosation and nitration processes, substituting the parameters into the dynamic simulation control system, and performing operation to obtain nitrosation and nitration reaction results. The method quantitatively describes the nitration process of ammonia nitrogen in a wastewater treatment process and accurately simulates the two-step nitration process.

Description

technical field [0001] The invention relates to the technical field of biological treatment of sewage, in particular to an operation optimization method for nitrification and nitrosation processes. Background technique [0002] With the increasing scarcity of carbon sources in urban sewage, the traditional biological denitrification process faces the problem of insufficient carbon sources, which leads to the risk of substandard nitrogen indicators in the treated discharge water. In recent years, scholars at home and abroad have conducted a lot of research on biological denitrification technology, and proposed some new biological denitrification processes, such as simultaneous nitrification and denitrification, short-range nitrification and denitrification, and anaerobic ammonium oxidation. [0003] Most of these new biological denitrification processes rely on completely or partially controlling the nitrification of ammonia nitrogen in the sewage biological treatment process...

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Problems solved by technology

[0006] However, for the simulation of the nitrification process in the sewage biological treatment process, the existing research is limited to the one-step nitrification process in which ammonia nitrogen is directly oxidized to nitrate nitrogen, which simplifies the fact that ammonia nitrogen first goes to nitrite nitrogen and then to nitrate nitrogen in the actual biological process. Two-step nitrification process for nitrogen, not accurately modeled for ammonia nitrogen nitrification

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