Short-range intelligent and precise aeration control method, equipment and system for sewage treatment

Abstract

The invention discloses a short-range intelligent and precise aeration control method, equipment and system for sewage treatment, which belong to the field of sewage treatment. The steps include obtaining the water inflow, the first total nitrogen value and the first etc. effective BOD; set the target ammonia nitrogen value of the effluent from the aerobic pool; obtain the second ammonia nitrogen value, the second total nitrogen value, and the second equivalent BOD after the aerobic pool effluent; according to the first equivalent BOD and the second equivalent BOD The difference between the first total nitrogen value and the target ammonia nitrogen value, the difference between the first total nitrogen value and the second total nitrogen value, and the water inflow to calculate the basic air volume; based on the difference between the second ammonia nitrogen value and the target ammonia nitrogen value and the water inflow. Correct the air volume; superimpose the basic air volume and the corrected air volume to calculate the indicated air volume, and aerate according to the indicated air volume. The monitored parameters are less than the general intelligent aeration model. The air volume change is introduced to control the air volume when adjusting the air volume, and the water quality can be maintained. Aeration is beneficial to reduce aeration power consumption and protect activated sludge.

Description

technical field [0001] The invention relates to a short-range intelligent and precise aeration control method, equipment and system for sewage treatment, belonging to the field of sewage treatment. Background technique [0002] The direct production costs of sewage treatment plants are mainly electricity, medicine, mud, and repairs. Power consumption is the main direct production cost item. Among them, the fans used for aeration are the main power consumption, accounting for about 35% of power consumption- 55%. At present, many sewage treatment plants have inaccurate and excessive aeration, and there is a lot of room for precise control of fans, energy saving and consumption reduction. [0003] For the A2O (also known as A / A / O process, that is, the biochemical pool includes anaerobic pool, anoxic pool and aerobic pool in sequence according to the direction of sewage flow), low aeration will affect the nitrification reaction. In addition to high electricity costs, excessive...

AI Technical Summary

Problems solved by technology

For example, the sewage treatment process optimization and advanced control system ProSee is based on the activated sludge model ASM2D of the International Water Association. In addition to designing basic modeling parameters such as water quantity and quality, historical data, and real-time data, its embedded mathematical models include descriptions of biological The reaction kinetics (carbon oxidation, nitrification and denitrification, phosphorus removal, etc.) It will cause huge test pressure and too long time feedback, and the accurate aeration model itself already has a large deviation

[0007] The precise aeration control algorithm in the prior art is complex and bloated, and there are many phosphorus removal control parameters in the model, including uncontrollable dissolved oxygen internal circulation such as biological phosphorus removal system and backflow system, which are difficult to monitor; and the feedforward and feedback are separated The time is long, reaching more than 18 hours, including the entire sewage treatment process, the lag is serious, and precise aeration cannot be truly realized, which brings inconvenience to the operation of the water plant

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