Filling material hypoxia removing nitric dephosphorization technique

A technology for nitrogen and phosphorus removal and process, which is applied in the direction of aerobic and anaerobic process treatment, and can solve the problems of not considering whether there is denitrification process in aerobic zone, large design capacity of denitrification tank, low volumetric efficiency of reaction tank, etc. , to achieve the effect of saving process energy consumption, saving aeration energy consumption, and increasing the concentration of nitrifying bacteria

Inactive Publication Date: 2008-06-11
TONGJI UNIV
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Problems solved by technology

However, in the design and operation of the aerobic zone, whether there is denitrification process in the aerobic zone is not considered, and the denitrification process only occurs in the anoxic zone;
[0005] 2. The function of the anoxic area is defined as denitrification, and other areas are not considered in the process, such as: the denitri

Method used

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  • Filling material hypoxia removing nitric dephosphorization technique

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Embodiment Construction

[0021] The present invention is further described with reference to the above-mentioned accompanying drawings.

[0022] The process of the present invention consists of a (deficiency) anaerobic tank 1, an aeration tank 2, a secondary sedimentation tank 3, a sludge return system 4 and an aeration system 5. An agitation device is arranged in the (deficiency) anaerobic tank 1 , and a filler area 21 and a low-oxygen area 22 are arranged at intervals in the aeration tank 2 , and the aeration tank 2 communicates with the aeration system 5 . The aeration system 5 controls the dissolved oxygen levels set in the filling area 21 and the hypoxic area 22 through automatic control to ensure the effect of water treatment.

[0023] 1. Treatment of urban sewage

[0024] Before the urban sewage enters the process of the present invention, the sewage is firstly pretreated by grids and degreasing, and then pretreated by the short-time primary sedimentation tank in front of the process of the pr...

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Abstract

Provided is a process of hypoxia phosphorus and nitrogen removal for stuffing, relating to a biological wastewater treatment process, which is used in the biological treatment process of urban and industrial wastewater for the treatment of phosphorus and nitrogen removal. The process of the invention is provided with a stuffing area (21) and a hypoxia area (22) which are in interval arrangement inside an aeration tank (2), the nitrification and denitrification procedures are simultaneously realized inside the aeration tank (2), thereby not only is a large amount of aeration saved, but also inner return-flow systems are reduced, and the process flow is simplified. Therefore, compared with the prior art of AAO series process either on operation effect or on operational energy consumption, the invention can save aeration amount by 20%-30%, the total quantity of reflux can be controlled within 100%, which is 300%-400% lower than the existing AAO series process, construction and operation costs of sewage treatment is effectively reduced, and the invention has the perfect environmental, social and economical benefits.

Description

technical field [0001] Filler low-oxygen denitrification and phosphorus removal process involves sewage biological treatment technology, which is applied to urban and industrial sewage biological treatment processes for nitrogen and phosphorus removal treatment. Background technique [0002] Biological nitrogen and phosphorus removal (AAO) series processes are widely used in urban sewage biological nitrogen and phosphorus removal sewage treatment plants due to their stable effect, mature design theory and methods, and wide adaptability. At present, the AAO series processes mainly include: traditional AAO process, improved AAO process, UCT process, VIP process, inverted AAO process, etc. The basic idea of ​​the current AAO series process is to carry out carbon oxidation, aerobic phosphorus uptake and nitrification processes in the aerobic zone. The function of the anaerobic zone is mainly anaerobic phosphorus release, and the function of the anoxic zone is mainly denitrificat...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 董滨何群彪屈计宁周增炎高廷耀
Owner TONGJI UNIV
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