A deep nitrogen and phosphorus removal process based on sbbr

Abstract

The invention discloses a deep denitrification process based on SBBR, which belongs to the technical field of environmental engineering. The SBBR equipment is used to make the sewage in the SBBR reactor operate according to the mode of anaerobic → low oxygen → anoxic, which provides favorable conditions for microorganisms to store PHA in the anaerobic period and use it for nitrite denitrification and phosphorus accumulation in the low oxygen period. By precisely controlling the time of hypoxic period and post-anoxic period, the process of ammonia oxidation and denitrification can be precisely controlled, so as to realize the deep denitrification of sewage. After the device has been in operation for a certain period, an external carbon source is added to the reactor in the early stage of anaerobic phase to enhance phosphorus release, and the stirring is stopped at the end of the anaerobic phase to allow the mixed solution to settle, and then the phosphorus-rich supernatant is discharged into the phosphorus removal sedimentation tank. Reintroduce water to SBBR to enter normal cycle operation. For the phosphorus-rich supernatant discharged into the phosphorus removal sedimentation tank, chemical phosphorus removal agents are used to generate precipitated phosphorus fixation, and the supernatant after phosphorus removal enters the water inlet tank of the SBBR reactor for further treatment. Through the above measures, the effect of efficient nitrogen and phosphorus removal can be achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a deep denitrification and dephosphorization process based on SBBR. Background technique [0002] my country has a vast territory and the structure of rural villages is complex. From an economic point of view, rural sewage is more suitable for decentralized collection and treatment. Distributed treatment often uses integrated treatment equipment due to the small amount of water. Among the sewage treatment technologies used are MBR process, contact oxidation process and so on. However, the effect of rural sewage treatment is still unsatisfactory due to the disadvantages of large investment, high operating cost, difficult operation and management, or unqualified effluent quality in the process technology itself. With the gradual strict management of rural sewage discharge, the traditional treatment technology has been difficult to meet the requiremen...

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Problems solved by technology

However, the effect of rural sewage treatment is still unsatisfactory due to the disadvantages of large investment, high operating cost, difficult operation and management, or unqualified effluent quality in the process technology itself.

With the gradual strict management of rural sewage discharge, the traditional treatment technology has been difficult to meet the requirements. Therefore, the development of new technologies suitable for decentralized sewage treatment in rural areas and communities, especially the technology to achieve efficient nitrogen and phosphorus removal has become an important issue. urgent need

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