Filling material hypoxia removing nitric dephosphorization technique

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...

AI Technical Summary

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 denitrification in the aerobic area, resulting in a larger design capacity of the denitrification pool;

[0006] 3. There are more than 2 sets of reflux systems in the existing AAO series process, and 3 sets of reflux systems in the UCT process, resulting in high energy consumption, complicated process, and low volumetric efficiency of the reaction pool

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