Integrated high-efficiency autotrophic denitrification reactor

Abstract

The invention discloses an integrated efficient autotrophic nitrogen removal reactor. The reactor comprises an inner barrel and an outer barrel which are coaxially arranged, wherein a three-phase separator and a horn barrel which is tightly connected with an expanding part of the diameter at the upper part of the wall of the outer barrel are coaxially mounted at the upper part of the inner barrel in a sleeving manner; a space formed by the inner barrel and the outer barrel is divided into an anaerobic zone and a precipitating zone by utilizing the horn barrel; the inner barrel is taken as an aerobic zone; an annular overflow weir used for isolating the precipitating zone and the anaerobic zone is arranged on the top surface of the inner barrel; short-range nitrification sludge is inoculated in the aerobic reaction zone; a spiral micropore aeration pipe is arranged in the aerobic reaction zone; anaerobic ammonia oxidation sludge is inoculated in the anaerobic reaction zone; granule-state bamboo charcoal fillers are added into the anaerobic reaction zone to serve as a sludge carrier. According to the reactor, the individual culturing of different functional microorganisms in the single reactor is realized, so that the key operation requirements of partial nitrification and anaerobic ammonia oxidation processes can be satisfied; the efficient and stable running of the reactor is ensured. Thus, the reactor disclosed by the invention is suitable for treating wastewater with a high ammonia-nitrogen ratio and a low carbon-nitrogen ratio.

Description

technical field [0001] The invention belongs to the technical field of sewage biological denitrification treatment, and in particular relates to an integrated high-efficiency autotrophic denitrification reactor. technical background [0002] The environmental hazards caused by nitrogen pollution in my country's water bodies are becoming increasingly severe. Ammonia nitrogen is the main pollutant, and its discharge far exceeds the environmental capacity of the receiving water body. In recent years, it has become the main pollution indicator of the seven major water systems in my country. The biological denitrification process is the main method for removing nitrogen in water bodies. The traditional biological denitrification process is mostly based on the principle of nitrification-denitrification. Wastewater, such as landfill leachate, livestock and poultry breeding wastewater and other wastewater with high ammonia nitrogen and low carbon nitrogen ratio, shows great limitati...

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Problems solved by technology

However, the two-stage process is prone to the accumulation of nitrite in the short-range nitrification stage, which will inhibit the microorganisms. At the same time, the infrastructure investment and floor area of ​​the whole process are also large; Long-term exposure of oxidizing bacteria to a certain concentration of aerobic environment will reduce the activity of anammox bacteria to a certain extent, and it is difficult to maintain the stability of the short-term nitrification process through dissolved oxygen control alone, which eventually leads to autotrophic single-stage reactor Difficult to achieve high nitrogen removal load in

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