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Sewage treatment process optimization control method based on multiple gradient descent

A sewage treatment and control method technology, applied in the field of water treatment, can solve problems such as poor self-adaptability, high nonlinearity, time variation, etc., and achieve the effect of promoting efficient and stable operation, saving investment and operating costs

Active Publication Date: 2015-02-18
BEIJING UNIV OF TECH
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  • Abstract
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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

Method used

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  • Sewage treatment process optimization control method based on multiple gradient descent
  • Sewage treatment process optimization control method based on multiple gradient descent
  • Sewage treatment process optimization control method based on multiple gradient descent

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Embodiment Construction

[0048] The invention obtains a model prediction method based on multi-gradient descent, and realizes dissolved oxygen DO and nitrate nitrogen S in the sewage treatment process NO Multi-objective control of concentration; this control method solves the multi-objective problem in the sewage treatment process by constructing the multi-objective function of the control system and the optimization method based on multi-gradient descent, and achieves the control of dissolution by controlling the optimized aeration amount and internal circulation return flow Oxygen DO and nitrate nitrogen S NO The purpose of the concentration; solve the problem of multi-objective optimal control in the sewage treatment process, improve the dissolved oxygen DO and nitrate nitrogen S in the sewage treatment process NO The control accuracy ensures the normal operation of the sewage treatment process;

[0049] The present invention adopts following technical scheme and implementation steps:

[0050] 1....

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G06F19/00
Inventor 韩红桂张璐乔俊飞
Owner BEIJING UNIV OF TECH
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