Sewage treatment process optimization control method based on multiple gradient descent

Abstract

The invention provides a sewage treatment process optimization control method based on multiple gradient descent, focuses on the disadvantages that the linearity, coupling and uncertainty are high in the sewage treatment process and aims to control the concentrations of dissolved oxygen DO and nitrate nitrogen SNO simultaneously in the sewage treatment process. The control method includes establishing a multiple objective function of a control system, the multiple objective problem of the sewage treatment process is solved by the optimization method based on multiple gradient descent, and the purposes of controlling the concentrations of dissolved oxygen DO and nitrate nitrogen SNO by controlling the aeration rate and the internal recirculation flow after the optimization are achieved; the problem of the multiple objective problem of the sewage treatment process is solved, the control precision of the dissolved oxygen DO and nitrate nitrogen SNO in the sewage treatment process is improved, normal operation of the sewage treatment process is guaranteed, and the efficient and stable operation of a sewage treatment plant is guaranteed.

Description

technical field [0001] The invention utilizes a model predictive control method based on multi-gradient descent to realize dissolved oxygen DO and nitrate nitrogen S in the sewage treatment process NO Concentration control, dissolved oxygen DO and nitrate nitrogen S NO The concentration directly determines the effect of sewage treatment, and has an important impact on the quality of effluent water and the energy consumption of sewage treatment process. Applying the model predictive control method based on multi-gradient descent to the sewage treatment system, the dissolved oxygen DO and nitrate nitrogen S NO Optimizing control can not only save investment and operating costs, but also promote efficient and stable operation of sewage treatment plants. It is an important branch of advanced manufacturing technology, which belongs to both the field of control and the field of water treatment. Background technique [0002] The essence of the sewage biochemical treatment process...

AI Technical Summary

Problems solved by technology

Although the traditional switch control or PID control is currently a widely used control method, because the dissolution process of oxygen is affected by the water quality, temperature and pH value of the incoming water, it is highly nonlinear, strongly coupled, time-varying, and large characteristics such as hysteresis and uncertainty

The traditional switch control or PID control method has poor self-adaption ability and often cannot achieve ideal control effect

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