Air floating type semi-shortcut nitrification-anaerobic ammonia oxidation reactor

Abstract

The invention discloses an air floating type semi-shortcut nitrification-anaerobic ammonia oxidation reactor. The reactor mainly comprises a water inlet tank, a water inlet pump, a reactor body, a water outlet pump, a water outlet tank, a dissolved air pump, a pressure stabilizing tank, a water distribution device, a constant-temperature tank and a circulating pump. The reactor body mainly comprises a water inlet, a water outlet, a sludge discharge port, an exhaust port, an observation window, a constant-temperature water bath layer, a DO probe, a pH probe and a dynamic membrane assembly. Thebottom and the top of the reactor body are provided with the sludge discharge port and the exhaust port respectively and internally provided with the DO probe and the pH probe respectively, and the observation window and the constant-temperature water bath layer are arranged outside the reactor body. The constant-temperature water bath water inlet and the water outlet are in pipeline connection with the circulating pump through the constant-temperature tank. Part of discharged water is in pipeline connection with the water distribution device through the dissolved air pump and the pressure stabilizing tank; the dissolved air pump takes air as a dissolved air source. The reactor has the main advantages that the structure is simple, aerobic ammonia oxidizing bacteria and the anaerobic ammonia oxidizing bacteria can be effectively enriched at the same time, and stable operation of a semi-shortcut nitrification-anaerobic ammonia oxidation coupling process is achieved.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological denitrification, and in particular relates to an air flotation type semi-short-range nitrification-anammox reactor. Background technique [0002] Anaerobic ammonium oxidation is a new biological denitrification process, which can reduce nitrite to nitrogen under anaerobic conditions with ammonia as the electron donor. Compared with the traditional biological denitrification process, anaerobic ammonium oxidation has the advantages of good denitrification effect, less residual sludge output, low operating cost, etc., and has a good industrial application prospect. However, the insufficient source of nitrite has become a bottleneck for the independent operation of the anammox process. Ammonia nitrogen is completely converted into nitrite, which is called complete nitrosation; 50-57% of ammonia nitrogen is converted into nitrite, which is called semi-short-range nitrification. Ammonia ...

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Problems solved by technology

There are many types of semi-short-path nitrification reactors and anammox reactors, and the corresponding integrated semi-short-path nitrification-anammox reactors have also been integrated to varying degrees; compared with semi-short-path nitrification reactors and anammox The combination of reactors in series and the integrated semi-short-path nitrification-anammox reactor can further reduce the floor area; however, the corresponding functional bacteria (aerobic ammonium oxidizing bacteria and anammox bacteria) are still concentrated and distributed in one body The different spatial positions of the chemical reactor make the structure of the reactor complex, which is not conducive to its large-scale application

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