Municipal sewage treatment system oxidation ditch aeration regulation and control method

Abstract

The invention discloses a municipal sewage treatment system oxidation ditch aeration regulation and control method which is characterized in that a relation model between the sewage pollutant concentration of an inlet and an outlet of a municipal sewage treatment system and the aeration quantity required by an oxidation ditch is constructed, and on the premise of ensuring that the water quality reaches the standard and is discharged, a controller controls the aeration quantity required by the oxidation ditch according to the detected sewage pollutant concentration of the inlet and the outlet. The aeration quantity required by the oxidation ditch is calculated by using the relation model, and the frequency converter of the aeration fan of the oxidation ditch is controlled in real time, so that the aeration quantity of the oxidation ditch reaches the calculated aeration quantity required by the oxidation ditch. According to the invention, the aeration rate adjustment and the pollutant concentration change are linked in real time, and the frequency converter of the aeration fan of the oxidation ditch is controlled in an interlocking manner according to different pollutant concentrations on the premise of ensuring that the water quality reaches the standard for discharge, so that the automatic adjustment of the aeration rate is realized, insufficient aeration or excessive aeration is effectively prevented, the power consumption of the aeration fan is reduced, and the oxidation ditch is simpler and more convenient to operate.

Description

technical field [0001] The invention relates to the field of municipal sewage treatment, in particular to an aeration control method for an oxidation ditch of a municipal sewage treatment system. Background technique [0002] In recent years, my country's sewage treatment capacity has been rapidly improved. As of the end of June 2019, more than 5,000 urban sewage treatment plants (excluding industrial and township sewage treatment plants) have been built in cities across the country, with a sewage treatment capacity of 210 million cubic meters per day. [0003] Electricity consumption is the main energy consumption index of large-scale sewage treatment plants in my country. The electricity consumption per ton of sewage treatment is about 0.2-0.3 degrees, accounting for 50%-70% of the cost of sewage treatment. On the basis of the existing construction, through optimizing operation and improving management, there will be huge space for reducing energy consumption, which is als...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for regulating the aeration of the oxidation ditch of the municipal sewage treatment system, to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions

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