System and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation

Abstract

The invention discloses a system and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation and belongs to the field of sewage biological treatment. The system comprises a raw water tank, an organic matter removal and dephosphorization SBR reactor, a short-cut nitrification SBR reactor, an anaerobic ammonia oxidation granular sludge UASB reactor, a second regulating water tank and a short-cut denitrification-anaerobic ammonia oxidation UASB reactor. All functional floras are subjected to advantageous culture in different reactors according to respective growth characteristics, so that a sludge age contradiction between denitrification and dephosphorization is solved, and stability of the treatment system is enhanced; real-time control is applied to the short-cut nitrification SBR reactor to solve the problem that short-cut nitrification with a low ammonia and nitrogen level is hard to maintain stably; water discharged from the short-cut nitrification reactor and water discharged from the organic matter removal reactor are mixed to solve the problem that continuous flow half short-cut nitrification is hard to maintain; short-cut denitrification-anaerobic ammonia oxidation is used for further treatment of water discharged from the anaerobic ammonia oxidation reactor to solve the problem that nitrate nitrogen is generated during anaerobic ammonia oxidation.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a system and method for treating urban sewage by short-range nitrification-anammox followed by short-range denitrification-anammox. Background technique [0002] With the sustained and rapid development of my country's economy, the continuous advancement of urbanization, and the continuous improvement of people's living standards, the water consumption of residents continues to increase and a large amount of urban domestic sewage is discharged. If these sewage are allowed to flow into natural water bodies such as rivers, it will further aggravate the The eutrophication of natural water bodies in our country requires sewage treatment plants to discharge these sewage into water bodies after reaching the standard. However, the biological denitrification process of traditional sewage treatment plants generally uses the nitrification and denitrification process to r...

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Problems solved by technology

[0004] At present, the research on the denitrification process of anammox wastewater mainly has the following characteristics: (1) the research on high ammonia nitrogen is relatively mature, and there are many practical engineering applications; (2) the research on anaerobic ammonium oxidation process of low ammonia nitrogen wastewater It has gradually attracted the attention of researchers from various countries, and related research has gradually increased, but there is still a considerable distance from practical application; (3) The main difficulty in the research of low-ammonia nitrogen anaerobic ammonia oxidation process lies in the realization and stable maintenance of short-range nitrification; (4) Low ammonia nitrogen sewage In particular, urban domestic sewage has the characteristics of large water volume, large water quality fluctuations, and low water temperature in winter, which also limits the application of anaerobic ammonium oxidation in the field of urban sewage treatment to a certain extent.

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