AAO (Anaerobic-Anoxic-Oxic)-biological contact oxidation strengthened denitrification and dephosphorization device and real-time control method of low C/N sewage treatment

Abstract

The invention discloses an AAO (Anaerobic-Anoxic-Oxic)-biological contact oxidation strengthened denitrification and dephosphorization device and a real-time control method of low C / N sewage treatment. The system is mainly composed of a raw water tank, an AAO reactor, an intermediate sedimentation tank, a biological contact oxidation tank, a settling zone, a discharged water tank, an online control box and a computer. The real-time control method is as follows: a DO sensor online collects concentrations of dissolved oxygen in grid cells of the biological contact oxidation tank, and the computer calculates and outputs the concentrations to control the nitrification process; a NH<4+> sensor, a NO<3-> sensor, a NO<2-> sensor and a TP sensor online collect the concentrations of ammonia nitrogen, nitrate, nitrite and total phosphorus in the discharged water tank, and the computer calculates and outputs according to the signals collected by the sensors to adjust the aeration amount, the reflux ratio of nitrifying liquid and water intake C / N. By adopting the online real-time control equipment, the system operation is optimized, the energy is saved, the consumption is reduced, the carbon source and the aeration amount are saved and the residual sludge is reduced.

Description

Technical field

[0001] The invention belongs to the technical field of sewage biological treatment, and is particularly suitable for the deep denitrification and phosphorus removal of newly-built sewage treatment plants and the upgrading and transformation of old sewage treatment plants, and specifically relates to a real-time control device for low C / N sewage energy saving and consumption reduction and based on This enhanced method of nitrogen and phosphorus removal. Background technique

[0002] The eutrophication of water bodies caused by excessive discharge of nitrogen and phosphorus is currently one of the environmental issues that the national government and the public are most concerned about. The most fundamental way to control water eutrophication and prevent water pollution is to control pollution sources and control the nitrogen and phosphorus content in the effluent from sewage treatment plants to meet certain discharge standards. The sewage discharge standard issued...

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