Sewage treatment optimal control method with carbon source addition

Abstract

The invention discloses a sewage treatment optimal control method with carbon source addition, and belongs to the technical field of biological wastewater treatment. The method comprises the steps that 1, an added dynamics expression is written into simulation software containing an ASM2d model, an ASM2e model is constructed on the basis of the ASM2d model; 2, various technological assembly units in an ASM2e model base are used for constructing the sewage treatment technology; 3, the concentration of inflow water quality is converted into the component concentration of the ASM2e model, and preliminary steady state simulation is performed on the sewage treatment technology; 4, according to the preliminary steady state simulation result and sensitivity analysis, dynamics parameters and chemometrics parameters of the ASM2e are calibrated, and steady state simulation is achieved; 5, the steady state simulation result is adopted as an initial input value of dynamic simulation, and the dynamic inflow water quality is dynamically simulated and analyzed. The method is suitable for nitrogen and phosphorus removal effect simulation and optimal operation of a sewage treatment system in an anoxia or aerobic zone with sodium acetate.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, in particular to a method for optimizing control of sewage treatment by adding carbon sources. Background technique [0002] With the development of industry and agriculture, in order to protect the environment, sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields. At present, the activated sludge ASM2d model introduced by the International Water Association (IWA) is generally used in the sewage treatment process. Compared with other models, this model is more accurate in simulating the dynamics of nitrate and phosphorus and phosphorus salts. It is widely used in sewage treatment systems with nitrogen and phosphorus removal functions. Based on the ASM2d model and with the help of computer technology, the optimal operation of the sewage tr...

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Problems solved by technology

[0003] However, the ASM2d model is more complex, and the amount of calculation is large during operation

In order to reduce the complexity of the model, some simplification methods are introduced to the ASM2d model. These simplification methods directly lead to some defects in the ASM2d model during operation. For example, when the simulation system runs under certain conditions, the ASM2d model does not adapt to

[0004] In addition, there is an important defect in the ASM2d model: it cannot simulate the process of sodium acetate and other acetic acid substances in the anoxic tank and aeration tank

[0006] Therefore, the applicability of the ASM2d model in the actual sewage treatment process of adding sodium acetate is not strong, and it does not meet the characteristics of my country's sewage treatment industry

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