Integrated swimming self-circulation denitrification reactor

Abstract

The invention discloses an integrated swimming self-circulation denitrification reactor. A reactor body is provided with a water inlet zone, a reaction zone, a separation zone and a circulation zone; the water inlet zone is positioned at the lower part of the reactor and mainly comprises a water inlet pipe, a gas inlet pipe, an aeration head and a sludge discharge pipe; the reaction zone is positioned at the middle part of the reactor and mainly comprises a packing bracket and hollow ball packings which are fixed in a staggered manner; the separation zone is positioned at the upper part of the reactor and mainly comprises a diverging zone, an outgassing zone and a settling zone; the circulation zone is positioned outside the reactor and mainly comprises a backflow water suction pipe, a backflow water inlet pipe, a backflow connecting pipe and a backflow control valve. The integrated swimming self-circulation denitrification reactor fuses short-cut nitrification, denitrification and anaerobic ammonia oxidation into one whole body and can simultaneously implement carbon and nitrogen removal of wastewater; nitrate is converted when generated, so that biotoxicity caused by accumulation of the nitrate, which is generated due to excessively strong nitrification, can be avoided; microorganism distribution is relatively fixed, so that the functional bacteria environment can be optimized and biological denitrification can be strengthened; the packings swim in reaction liquid, so that mass transfer and reaction can be promoted and the volume efficiency can be improved; the reaction liquid is controlled to be self-circulated, so that concentration of aqueous ammonia nitrogen can be diluted and the problem of difficulty in regulation and control on the ratio of an anaerobic ammonia oxidation matrix also can be solved.

Description

technical field [0001] The invention relates to a biological denitrification reactor, in particular to an integrated swimming 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 2012, the discharge of ammonia nitrogen in the national wastewater was 2.536 million tons, equivalent to about four times the environmental capacity of the receiving water body. 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 wastew...

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Problems solved by technology

In the existing design, the short-cut nitrification process and the anammox process are usually separated into two devices, which can easily cause nitrite accumulation, inhibit ammonia oxidation, and limit the process efficiency; the anammox process requires ammonia nitrogen and The ratio of nitrite nitrogen is about 1:1.32, which is difficult to control in actual engineering

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