A method for precise control of real-time aeration in sewage treatment process based on activated sludge

Abstract

The invention discloses a real-time aeration precise control method in the process of treating sewage based on activated sludge. In the process of treating sewage in an aerobic reaction tank, the method sets the time according to the fluctuation range of the influent water property data and the hydraulic retention time Breakpoint, the time length between two adjacent time breakpoints is the stage time period t i ;According to the data transmitted by the sensor to the model calculation module in each stage time period, the dissolved oxygen concentration S required by the aerobic reaction pool is calculated O，set，i ; with cycle time T j as the interval, the dissolved oxygen concentration S of each stage time period O，set，i Blast air supply G required to convert to aerobic reaction tank j , the aeration air volume of the blower is regulated by controlling the execution module; the invention overcomes the roughness and blindness of the adjustment of the aeration air volume in sewage treatment, and can dynamically calculate the dissolved oxygen concentration currently required by the aerobic reaction tank in real time, so as to achieve Aeration is required to save energy while ensuring that the effluent reaches the standard and the biochemical treatment system is stable.

Description

(1) Technical field [0001] The invention relates to the field of aeration of sewage treatment, in particular to a method for precise control of real-time aeration in the sewage treatment process based on activated sludge. (2) Background technology [0002] Activated sludge method is a typical biological treatment method, and it is the mainstream sewage treatment method widely used in municipal sewage plants. Its basic principle is to use the metabolism of activated sludge microorganisms to decompose, absorb or adsorb pollutants in sewage Finally, the process of removing pollutants and purifying water quality is realized. [0003] The aeration link is the core link of this type of sewage treatment plant. On the one hand, activated sludge microorganisms can only maintain their own growth and reproduction needs under suitable dissolved oxygen conditions, and then complete a series of denitrification and phosphorus removal processes, so that the effluent can meet the discharge s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a real-time aeration precise control method in the sewage treatment process based on activated sludge. Information, real-time, dynamic, and accurate calculation and prediction of the air supply required for the aerobic reaction tank, and adjust the blower according to the air supply, so as to achieve aeration on time and on demand, and the water output is stable and up to standard, which solves the problem in the existing aeration model The biological mechanism is not perfect, the aeration is unreasonable, the control is extensive, the blower is frequently adjusted, the energy consumption is too high, and the resources are wasted.

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