Segmented oxygen supply self-circulation denitrification reactor

Abstract

The invention discloses a segmented oxygen supply self-circulation denitrification reactor. A reactor main body is provided with a water distribution area, a reaction area, a separation area and a circulation area, wherein a mud discharge pipe and a water inlet pipe are arranged in the water distribution area; the reaction area is formed to a segmented oxygen supply associated reaction system by three modules; an air inlet pipe is arranged at the lower part of a module I, and is provided with an aeration head at the upper end; a filler is mounted at the upper part of the module I; the structures of the module II and the module III are as the same as the structure of the module I; the module II and the module III are serially connected onto the module I sequentially; a longitudinal isolating plate is arranged in the separation area for dividing into a precipitate room and an air release room; an air collecting room is formed under the precipitate room and the air release room; the precipitate room is provided with an overflow weir, a water outlet groove and a water outlet pipe at the upper part; a dross draining pipe is arranged at the upper part of the air release room; the circulation area is provided with a reflux suction pipe, a connection pipe, a regulating valve and a reflux inlet pipe. The reactor is supplied with oxygen in the segmented manner, and can satisfy the oxygen amount needed by biological reactions to strengthen the partial nitrification effect; the reaction liquid is self-circulated to avoid the biotoxicity due to the accumulation of nitrite and to overcome the matrix ratio control difficulty, so that the volume denitrification effect of the reactor is improved.

Description

technical field [0001] The invention relates to a biological denitrification reactor, in particular to a segmental oxygen supply self-circulation denitrification reactor. Background technique [0002] After the pollution control and emission reduction during the "Eleventh Five-Year Plan" period, the chemical oxygen demand has been effectively controlled, and ammonia nitrogen pollution has become a major environmental problem. According to the Environmental Status Bulletin issued by the Ministry of Environmental Protection, in 2011, the national discharge of ammonia nitrogen in wastewater was 2.604 million tons, and ammonia nitrogen has become the main pollution indicator of the seven major water systems. After the organic pollutants are removed, the low carbon-to-nitrogen ratio becomes the main water quality characteristic of non-standard wastewater. Since the C / N ratio of substandard wastewater often cannot meet the value required by traditional denitrification technologie...

AI Technical Summary

Problems solved by technology

However, in the traditional design, the short-cut nitrification process and the anammox process are usually divided into two devices, which is easy to cause nitrite accumulation, inhibit ammonia oxidation, and limit the efficiency of the process; in addition, due to the anammox The ratio of ammonia nitrogen and nitrite nitrogen required by the oxidation process is 1:1.32, which is difficult to control in actual engineering

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