Sewage treatment optimized simulation method with ethanol-like substance as external carbon source

Abstract

The invention discloses a sewage treatment optimized simulation method with an ethanol-like substance as an external carbon source and belongs to the technical field of wastewater biological treatment. The method comprises the following steps: S1, writing an added dynamic expression into simulation software containing an ASM2d model, and constructing an ASM2g model by combining the ASM2d model; S2, constructing a sewage treatment technology by utilizing all the technological component units in an ASM2g model library; S3, converting concentration of inflow water into component concentration ofthe ASM2g model, and carrying out primary steady-state simulation on the sewage treatment technology; S4, calibrating dynamic parameters and chemometric parameters of the ASM2g model according to results of primary steady-state simulation as well as sensitivity analysis, and performing steady-state simulation; and S5, with a steady-state simulation result as an initial input value of dynamic simulation, carrying out dynamic simulation analysis on dynamic inflow water quality. The method disclosed by the invention is applicable to simulation of nitrogen and phosphorous removal effect and optimized operation of a sewage treatment system containing ethanol-like substances.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment, in particular to an optimization simulation method for wastewater treatment using ethanol as an additional carbon source. 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...

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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 flaw in the ASM2d model: the ASM2d model is not suitable for sewage treatment systems that add ethanol as an additional carbon source

[0005] Therefore, the applicability of the ASM2d model in the actual sewage treatment process of adding ethanol is not strong, and it does not meet the characteristics of the sewage treatment industry

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