Device and method for deep nitrogen and phosphorus removal by continuous flow AO-BCO (Biological Contact Oxidation)-DEAMOX (Denitrifying Ammonium Oxidation)

Abstract

The invention provides a device and method for deep nitrogen and phosphorus removal by continuous flow AO-BCO (Biological Contact Oxidation)-DEAMOX (Denitrifying Ammonium Oxidation) and belongs to thefield of biological sewage treatment. The device mainly comprises a raw water tank, an anaerobic zone, an aerobic zone, a secondary sedimentation tank, an intermediate water tank, a BCO reactor and an anoxic filter tank. The method mainly is that a pre-AO process is used for biological phosphorus removal; an effluent is divided into two sections after mud and water separation in the secondary sedimentation tank, wherein one section of effluent (50-60 percent) enters BCO for nitrification and then enters the anoxic filter tank; the other section of effluent (40-50 percent) directly exceeds theBCO to enter the anoxic filter tank, so that an optimum matrix ratio is provided for DEAMOX reaction. Therefore, the deep nitrogen removal of sewage is realized. The device and the method provided bythe invention are suitable for the treatment of the low-C / N urban domestic sewage, the effluent water quality is stable, and the energy consumption can be saved by 40-50 percent.

Description

technical field [0001] The invention relates to a device and method for deep nitrogen and phosphorus removal, belonging to the field of sewage biological treatment, and applicable to the technical fields of sewage treatment such as upgrading of existing and newly built sewage plants, treatment of urban domestic sewage and industrial waste water, and the like. Background technique [0002] With the rapid development of my country's industry and the continuous expansion of urban construction scale, the problem of urban domestic sewage and industrial wastewater polluting the environment has become increasingly prominent, and the resulting water crisis has also seriously hindered the sustainable development of my country's social economy. Although my country's sewage treatment rate is increasing year by year, and the scale of treatment is also expanding, the total annual discharge of nitrogen and phosphorus is still very large, and the resulting eutrophication of water bodies is ...

AI Technical Summary

Problems solved by technology

Its typical process, such as the traditional A / A / O process, can achieve the purpose of nitrogen and phosphorus removal at the same time, but because it is a single sludge system, there are often contradictions in carbon source competition and sludge age among functional bacteria. The denitrification and phosphorus removal effect is difficult to meet the standard stably

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