AO total nitrogen removal device and total nitrogen removal process

Abstract

The invention relates to an AO total nitrogen removal device. The device comprises an anoxic tank and an aerobic tank; a filler is arranged in the aerobic tank; and a supply flow path is arranged between the anoxic tank and the interior of the filler. The invention also relates to an AO total nitrogen removal process. The process comprises the following steps: receiving sewage, and enabling the sewage to pass through an anoxic environment and an aerobic environment in sequence; setting the filler in the aerobic environment; and supplying a mixed VFA produced in the anoxic environment to the interior of the filler in the aerobic environment. The device and process can improve nitrogen removal efficiency.

Description

technical field [0001] The invention relates to a water treatment device, in particular to an AO total nitrogen removal device. The invention also relates to a total nitrogen removal process. Background technique [0002] The N element contained in wastewater is an important factor for the eutrophication of water bodies, and it is also an important indicator for the control of sewage plants. Therefore, more and more attention is paid to the improvement of total nitrogen. However, in the traditional denitrification process, there are often effluent The instability of total nitrogen, the large volume of denitrification tank required, the excessive addition of carbon sources, and the difficulty of further improving water quality for traditional denitrification processes, etc., all of these problems restrict the improvement of TN (total nitrogen) important factor in the transformation. [0003] At present, the main processes for total nitrogen treatment are: AO denitrification...

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Problems solved by technology

[0002] The N element contained in wastewater is an important factor for the eutrophication of water bodies, and it is also an important indicator for the control of sewage plants. Therefore, more and more attention has been paid to the improvement of total nitrogen. However, in the traditional denitrification process, there are often effluent The instability of total nitrogen, the large volume of denitrification tank required, the excessive addition of carbon sources, and the difficulty of further improving water quality for traditional denitrification processes, etc., all of these problems restrict the improvement of TN (total nitrogen) Important Factors for Retrofit

[0003] At present, the main processes for total nitrogen treatment are: AO denitrification process, oxidation ditch process, SBR process, MBR process, denitrification filter process, short-cut nitrification, anaerobic ammonium oxidation process, etc. These processes have their unique characteristics, but They also have their disadvantages, such as the low denitrification efficiency of the traditional AO process, the excessive tank capacity required by the oxidation ditch, the instability of the effluent treated by the SBR process, the high carbon source required by the denitrification filter, short-range nitrification and anammox The actual engineering application of process denitrification is immature, and these shortcomings are important factors restricting the upgrading and transformation of TN

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