Anaerobic ammonium oxidation bacterium coupled heterotrophic denitrifying bacterium synergistic denitrification device and culture method thereof

Abstract

The invention discloses an anaerobic ammonium oxidation bacterium coupled heterotrophic denitrifying bacterium synergistic denitrification device and a culture method thereof. The device comprises an adjusting water tank, a reactor main body and a water outlet tank, wherein the adjusting water tank is connected with the reactor main body through a water inlet pump; the reactor main body is connected with a water outlet tank through a water outlet pipe; the reactor main body is provided with a water inlet pipe, a dosing pipe, a dosing pump, a thermometer, a mechanical stirrer, an exhaust pipe, a water outlet pipe, a sampling port and a sludge discharge pipe; wherein the dosing pump and the mechanical stirrer are respectively connected with the timing device; the exhaust pipe is connected with the gas buffer bottle; a filter screen is arranged at the water outlet pipe. According to the device disclosed by the invention, the anaerobic ammonium oxidation bacteria are enriched firstly, and then the adding amounts of nitrate and a carbon source in raw water are gradually increased after stabilization, so that the denitrification activity in the anaerobic ammonium oxidation reactor is gradually activated, and the inhibition of direct excessive carbon source on the activity of the anaerobic ammonium oxidation bacteria and the excessive proliferation of denitrifying bacteria caused by adding the nitrate and the carbon source are avoided.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, and relates to a device for synergistic denitrification of anaerobic ammonium oxidizing bacteria coupled with heterotrophic denitrifying bacteria and a cultivation method thereof. Background technique [0002] Excessive discharge of nitrogen will cause very serious harm to the environment. The traditional nitrification and denitrification biological process requires a large amount of aeration, resulting in high power consumption. When treating wastewater with a low carbon-to-nitrogen ratio, adding a large amount of carbon sources will lead to an increase in treatment costs. The anaerobic ammonium oxidation process is a new type of autotrophic denitrification process. The anaerobic ammonium oxidation process does not consume organic carbon sources and is mostly used for low carbon-to-nitrogen ratio sewage treatment. The necessary substrate for the anammox process contains nit...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, seek to design and provide a device and method for realizing anaerobic ammonium oxidation coupling heterotrophic denitrification treatment of domestic sewage, and solve the problem of insufficient carbon source in the traditional denitrification process. The process is simple, the operating cost is low, and the sludge output is small. It combines the advantages of new biological denitrification technologies such as anaerobic ammonium oxidation and denitrification denitrification, and realizes high efficiency and low energy consumption of sewage while utilizing the carbon source of raw water to the greatest extent. denitrification

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