Operation control method for sewage treatment

Abstract

The invention discloses an operation control method for sewage treatment. The method is applied to a sewage treatment control system. The control system comprises a central control unit, an on-site adjusting unit and a sensing unit. The central control unit is a PLC control module. The on-site adjusting unit is composed of an electric regulating valve, a frequency-variable blower fan, a water pump and a solenoid valve. The sensing unit comprises an on-line COD monitor, an on-line BOD monitor, an on-line total nitrogen monitor, an on-line ammonia nitrogen monitor, an on-line dissolved oxygen monitor, an on-line pH value monitor, a liquid level sensor, an on-line sludge concentration monitor, a flow monitor and a pressure sensor. In the operational process of sewage treatment, the central control unit carries out real-time control of sewage treatment according to parameters such as COD, BOD, ammonia nitrogen, microbe and sludge activity fed back by the sensing unit, so that accurate automatic control of the sewage treatment is achieved, energy consumption is reduced, and stability of effluent quality of is improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an automatic sewage treatment operation control method which comprehensively considers various operation parameters in the sewage treatment operation. Background technique [0002] The sewage treatment industry started relatively late in my country. Most of the sewage treatment control systems have low automation, low safety, and improper management. The operation level of sewage treatment stations is lower than that of developed countries. In the sewage treatment system, the control of the water inflow, the control of the aeration rate, and the adjustment of the return flow are often adjusted according to the theoretical model, and the process parameters in the sewage treatment operation process are not fully considered, which leads to the failure of the sewage treatment system. Running in the optimal state will lead to a large amount of energy consumption, and the ef...

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Problems solved by technology

[0002] The sewage treatment industry started relatively late in my country. Most of the sewage treatment control systems are not highly automated, have low safety, and are improperly managed. The operation level of sewage treatment stations is lower than that of developed countries.

In the sewage treatment system, the control of the water inflow, the control of the aeration rate, and the adjustment of the return flow are often adjusted according to the theoretical model, and the process parameters in the sewage treatment operation process are not fully considered, which leads to the failure of the sewage treatment system. Running in the optimal state will lead to a large amount of energy consumption, and the effect of sewage treatment is often not up to people's requirements. Therefore, precise control of the operation of sewage treatment is the main problem to be solved urgently

Aiming at the current situation that the automatic control system of many sewage treatment plants has low efficiency, large sewage treatment cost, unsatisfactory operation effect and unstable discharge water quality, a new type of sewage operation control technology is established. By adopting an effective automatic control system, It is of great significance to optimize the operation effect

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