Accurate and intelligent carbon source adding control system and method

Abstract

The invention discloses a carbon source accurate intelligent feeding control system and method, the system comprises an online monitoring system, a carbon source feeding system, a first PLC controller, a second PLC controller and a third PLC controller, the carbon source feeding system is electrically connected with the first PLC controller to control the feeding of a carbon source; the online monitoring system collects inlet and outlet water TN, inlet water instantaneous flow, ammonia nitrogen and COD data and anoxic zone DO, pH values and ORP values through instruments, the instruments of the online monitoring system are all electrically connected with the second PLC, the third PLC serves as a sampling and sample measuring master control PLC and receives a sample measuring command of the second PLC, and the third PLC is electrically connected with the second PLC. A command is sent to an instrument for sampling, sample reserving and detection, a sample detection result is fed back to the second PLC, and a water sample pretreatment unit is arranged between the anoxic zones of the biochemical pool. According to the accurate intelligent adding control system and method for the carbon source, accurate automatic adding of the carbon source agent is achieved, the agent adding efficiency is improved, and the agent cost is controlled and reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a precise and intelligent dosing control system and method of sodium acetate carbon source. Background technique [0002] The AAO process and the improved AAO process are the most common sewage nitrogen and phosphorus removal processes in my country's urban sewage treatment process. The standard discharge of the treated effluent and the energy saving and consumption reduction in the operation process are of great significance to the protection of my country's surface water environment. Due to the influence of factors such as influent load fluctuations, it is usually difficult for the AAO process to maintain a stable and efficient pollutant removal capacity. The addition of external carbon sources is an important strategy to reduce the concentration of total nitrogen in the effluent. The addition of external carbon sources should be precise and appropriate. It...

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Problems solved by technology

[0007] (1) The carbon source dosing system is separated from the production process control, and effective linkage cannot be realized. Only simple offline calculation of dosing amount and manual adjustment can be realized, which cannot meet the requirements of precise dosing control

[0008] (2) The carbon source dosing system cannot be based on the amount of treated water, the TN of sewage plant influent, the carbon source efficiency of the biochemical treatment system, and the NO in the anoxic zone of the biochemical pool. 3 -N, water outlet TN, adjust the dosage in real time, and the measurement method is relatively extensive

[0010] (4) The front end of the nitrate nitrogen analyzer in the carbon source dosing system did not add a water sample pretreatment device, resulting in a large deviation in the instrument detection data

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