Synchronous short-cut denitrification-partial nitrosation-anaerobic ammonia oxidation system and method for sewage

Abstract

The invention provides a synchronous short-cut denitrification-partial nitrosation-anaerobic ammonia oxidation system for sewage. A reactor in the system is divided into the following communicated areas from bottom to top through partition plates: a short-cut denitrification area, a partial nitrosation-anaerobic ammonia oxidation area and a three-phase separation area. Sewage and nitrate nitrogen-containing reflux liquid enter the short-cut denitrification area, nitrate nitrogen is reduced into nitrite nitrogen through short-cut denitrification bacteria, and meanwhile organic matters are removed; water containing ammonia nitrogen and nitrite nitrogen passes through the partial nitrosation-anaerobic ammonia oxidation area, part of ammonia nitrogen is oxidized into nitrite nitrogen through ammonia oxidizing bacteria, meanwhile, the remaining ammonia nitrogen and nitrite nitrogen are denitrified through anaerobic ammonia oxidizing bacteria. A first partition plate is arranged between thepartial nitrosation-anaerobic ammonia oxidation area and the short-cut denitrification area; the three-phase separation area is used for separating a treated product, and a second partition plate is arranged between the three-phase separation area and part of the nitrosation-anaerobic ammonia oxidation area; the three-phase separation area is provided with a three-phase separator, and reflux liquid obtained after three-phase separation is pumped to the short-cut denitrification area through a reflux inlet.

Description

technical field [0001] The invention generally relates to the technical field of sewage treatment, in particular to a sewage synchronous short-range denitrification-partial nitrosation-anammox system and method. Background technique [0002] With the rapid development of my country's economy and society and the acceleration of urbanization, the amount of wastewater discharge continues to increase, and a large amount of nitrogen is discharged into the water body along with industrial wastewater, agricultural wastewater and domestic sewage, causing serious damage to the ecological environment and also affecting human health. Denitrification of wastewater is an important and prominent problem that needs to be solved urgently in my country's water environment pollution. [0003] At present, the traditional biological nitrification / denitrification is still the mainstream process for denitrification of sewage, but it has the disadvantages of large area, high energy consumption, low...

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Problems solved by technology

[0005] Patent CN 103214092 A discloses a short-range nitrification-ANAMMOX biological denitrification device. The process is controlled by a PLC system to operate as a whole, and integrates process control and end point control, flexibly responds to the fluctuation of influent ammonia nitrogen load, and is resistant to ammonia nitrogen impact The load capacity is strong, which avoids the instability of the anaerobic ammonium oxidation process under the condition of changing water quality. 11% of nitrogen), when it is applied in the process of high ammonia nitrogen wastewater treatment, the concentration of nitrate nitrogen in the effluent of the system is much higher than the theoretical calculation value, resulting in the total nitrogen removal rate is always less than 90%, and the total nitrogen in the effluent is difficult to reach the standard

[0006] Patent CN 104150590 B discloses an efficient and economical bioreactor for simultaneous removal of nitrate nitrogen and ammonia nitrogen, which realizes simultaneous denitrification and carbon removal without aeration, but the substrate required for anaerobic ammonium oxidation in this reactor (Nitrite nitrogen), derived from short-range denitrification, anaerobic ammonium oxidation operation is unstable under the condition of water quality fluctuation, the ability to withstand hydraulic shock is poor, and the removal load is limited by short-range denitrification

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