Method for intelligent optimization and control of aeration in sewage treatment

Abstract

The invention relates to a wastewater disposal intelligent optimization control aeration quantity method which is characterized by adopting the control mode combining various intelligent control methods to enable concentration of dissolved oxygen in various aeration tanks to be kept within a range of target requirements. A fuzzy expert control method is adopted to control frequency of an air blower and achieve accurate adjustment of aeration quantity. A method combining a predictive control technology and the fuzzy control technology is adopted to control an air flow adjusting valve and achieve effective distribution of the aeration quantity to two or more parallel biological aeration tanks. Due to the fact that the fuzzy control technology is adopted to decouple a control function coupling effect in control to the air flow adjusting valve and the frequency of the air blower, water quality requirements and energy-saving requirements can be better met.

Description

technical field [0001] The invention relates to an intelligent optimal control method for aeration of sewage, in particular to two or more parallel biological aeration tanks used in the aeration process of most sewage treatment plants at present, so as to realize online precise control of aeration volume. Background technique [0002] In the current control technology, most sewage treatment plants use two simple single-loop controls to regulate the dissolved oxygen concentration. One is to use a dissolved oxygen concentration detector and a blower as a simple control loop. When the dissolved oxygen concentration is greater than the set value, turn down the blower frequency; when the dissolved oxygen concentration is too high, turn up the dissolved oxygen concentration. The second is to use a dissolved oxygen concentration detector and a gas flow regulating valve as a control loop. When the dissolved oxygen concentration of two or more parallel biological aeration tanks is ...

AI Technical Summary

Problems solved by technology

The disadvantage of the above control method is that there is a coupling phenomenon between the control of the gas flow valves of multiple aeration tanks and the control of the blower frequency, and the dissolved oxygen concentration cannot be accurately controlled.

Due to the unstable water quality of raw sewage in the process of sewage treatment and the serious interference of the external environment, the main method of water purification is to use the life activities of microorganisms to remove organic matter. There are many factors that affect the effect of sewage treatment. Therefore, it is very important to establish an accurate model of the sewage process. Difficulty, and various control methods based on precise mathematical models are even more difficult to achieve ideal results in the control of sewage treatment process

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