Device and method for strengthening A2/O denitrification

Abstract

The invention discloses a device for strengthening A2 / O denitrification. The anaerobic region of the AAO device and a sludge denitrification pond are connected, the aerobic region of the AAO device is connected with a settling pond, and the sludge denitrification pond is connected with the anaerobic region of the AAO device. The settling and sludge storage functions of the settling pond are separated through technological adjustment, the functions of the original sludge concentration pond are expanded, the original sludge concentration pond is upgraded into the sludge denitrification pond, the overall performance of the sewage treatment system is enhanced, the energy-saving stable and efficient denitrification and dephosphorization of the combined system are realized under the condition of not adding structures, and a theoretical basis and technical support are provided for the upgrading and reconstruction of a municipal sewage treatment plant.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and is particularly suitable for upgrading sewage treatment plants and building new sewage advanced treatment plants, and in particular relates to an A / A / O device and method for enhanced denitrification of sewage treatment. Background technique [0002] At present, less than 10% of urban sewage treatment plants in my country can meet the national first-class A discharge standard. The key problem is that TN and TP cannot meet the standard stably. [0003] As the simplest simultaneous denitrification and phosphorus removal process, AAO has the advantages of simple structure, short hydraulic retention time, rich experience in design and operation, and low control complexity. It is the main process of domestic urban sewage treatment plants, and the treated water accounts for the total More than 70% of the water volume. However, in the AAO nitrogen and phosphorus removal system, p...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the current AAO process, and combine the three key technologies of energy saving and consumption reduction, effective utilization of carbon sources and sludge reduction, to propose a sewage treatment device and method based on AAO, and realize the sedimentation of the sedimentation tank through process adjustment Separation from sludge storage function, expanding the function of the original sludge thickening tank, upgrading to a sludge denitrification tank, strengthening the overall performance of the sewage treatment system, and realizing energy-saving, stable and efficient denitrification of the combined system without adding new structures Phosphorus removal, providing theoretical basis and technical support for standard upgrading and upgrading of urban sewage treatment plants

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