Sewage disposal optimal control method based on multi-objective differential evolution algorithm

Abstract

The invention designs a sewage disposal process optimal control method based on a multi-objective differential evolution algorithm, and solves the problem that the concentrations of dissolved oxygen (DO) and nitrate nitrogen (SNO) are difficult to optimize and control simultaneously in the sewage disposal process. On the premise of guaranteeing effluent quality to meet national regulation emission standard in a municipal sewage disposal system, the energy consumption is reduced, and the optimization and control for the concentrations of the dissolved oxygen (DO) and the nitrate nitrogen (SNO) are important links for realizing stable operation of the sewage disposal process as well as energy conservation and emission reduction. Aeration energy dissipation AE, pumping energy dissipation PE and cost EQ needing to be paid for receiving waterbody emission pollutants are taken as optimal objectives, the improved multi-objective differential evolution algorithm is used for solving optimal set values for the concentrations of the dissolved oxygen (DO) and the nitrate nitrogen (SNO), and accurate tracking control is carried out by using aeration rate and internal recycle reflux quantity as controlled quantities, so that the effluent quality reaches the standard, the operating cost of the sewage disposal process is reduced, and the benefit for the sewage disposal process is improved.

Description

technical field [0001] Aiming at the characteristics of the urban sewage treatment process, the present invention designs a sewage treatment optimization control method by using an improved multi-objective differential evolution algorithm, and realizes dissolved oxygen DO and nitrate nitrogen S in the sewage treatment process. NO Optimal control of concentration; dissolved oxygen DO and nitrate nitrogen S NO The optimization and control of concentration is an important link to realize the stable and safe operation of the sewage treatment process and energy saving and emission reduction. It is an important branch of the process industry technology field, which belongs to both the control field and the sewage treatment field. Background technique [0002] The purpose of urban sewage treatment is to reduce energy consumption as much as possible on the premise of ensuring that the effluent quality meets the national discharge standards, and to achieve the best state of stable op...

AI Technical Summary

Problems solved by technology

However, since the optimization of operating parameters in the sewage treatment process is often multi-faceted, if the EQ that characterizes the treatment effect is not included in the optimization target, the overall optimization effect will be affected, and the sewage treatment process will not be able to achieve the whole process optimization directly.

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