A biofilm denitrification reactor and a method for fast film formation

Abstract

The invention discloses a biofilm denitrification reactor and a rapid biofilm forming method. A transverse plate a, a vertical plate b, a vertical plate c and a transverse plate d are arranged in the reactor. The reactor is transversely divided into an upper part and a lower part through the transverse plate a, wherein the lower part is a first anaerobic zone A1, the upper part is longitudinally divided into three parts through the vertical plate b and the vertical plate c, and the three parts sequentially include an aerobic zone O, a transition zone and a second anaerobic zone A2. The lower end of the vertical plate b and the transverse plate a are connected in a sealed manner. A water passing opening is reserved between the upper end of the vertical plate b and the top of the reactor. The upper end of the vertical plate c and the top of the reactor are connected in a sealed manner. A water passing opening is reserved between the lower end of the vertical plate c and the transverse plate a. The left end of the transverse plate d and the bottom of the vertical plate c are connected in a sealed manner. The right end of the transverse plate d and the wall of the reactor are connected in a sealed manner. The transition zone is filled with sponge iron deoxidant particles. When biofilm forming is conducted, water enters the reactor from the bottom, sewage is discharged from the upper portion of the reactor after sequentially passing through the anaerobic zone A1, the aerobic zone O, the transition zone and the anaerobic zone A2, biofilms in all the zones in the reactor are cultivated in a partitioned manner, the biofilms with specific performance can be better formed, the biofilm forming is rapid, and the denitrification effect is good.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a biofilm denitrification reactor and a method for quickly forming a film. Background technique [0002] In recent years, with the rapid development of my country's urbanization, my country's water environment pollution and water eutrophication have become more and more serious. More and more seriously hinder the development of our national economy. Nitrogen is the main pollutant that causes eutrophication in water bodies, and it is particularly important to control the total nitrogen content in discharged sewage. [0003] In the biological denitrification process, A 2 The / O biofilm denitrification process is a new biological denitrification process developed rapidly in recent years. This process has the advantages of small tank capacity, difficult sludge expansion, high denitrification efficiency, and convenient operation and management. Tradit...

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Problems solved by technology

However, the second aerobic pool of the device is directly connected to the anoxic pool, and the dissolved oxygen in the aerobic pool will be brought into the anoxic pool, and the dissolved oxygen in the anoxic pool will increase, which will affect the reaction in the anoxic area. efficiency

[0005] CN200810012685.6 discloses a quick start-up method for short-range nitrification of ammonia-containing wastewater, which is characterized in that it uses enriched nitrifying bacteria or a mixture of nitrifying bacteria and aerobic activated sludge from sewage treatment plants as the inoculum; although the short-range Rapid start of nitrification, but does not take into account the removal of total nitrogen

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