A reactor for efficiently retaining anaerobic ammonium oxidizing bacteria under low temperature conditions

Abstract

The invention discloses a reactor for efficiently intercepting anaerobic ammonium oxidation bacteria under the low-temperature conditions. The lower part of a reactor main body is provided with a cyclone water distributor; a non-woven fabric, a sieve screen, a stirring paddle, a three-phase separator and a descending pipe are arranged in the reactor main body; the upper part of the reactor main body is provided with a cyclone separator; a water outlet pipe, a water inlet pipe and an overflow pool are arranged outside the reactor main body. The cyclone separator uses a centrifugal sedimentation principle for separating the anaerobic ammonium oxidation bacteria with large particle diameters from suspension at the upper part of the reactor; the anaerobic ammonium oxidation bacteria fall back into the reactor; the anaerobic ammonium oxidation bacteria can be favorably separated from other bacteria; the mixing in the reaction region can be enhanced through the descending pipe reflux; meanwhile, the inflow water is diluted for improving the anti-impact load performance of the reactor; the interference of air bubbles generated by the reactor on the attached stains can be weakened by the installed sieve screen; the strain loss is reduced; the middle part in the reactor is provided with materials such as the non-woven fabric for intercepting the bacteria; the processing capability of the reactor is enhanced; the integral starting time of the reactor is shortened; the tangential water flow can be generated by the cyclone water distributor; the uniform water distribution is ensured; the mass transfer is favorably enhanced.

Description

technical field [0001] The invention relates to a reactor for efficiently retaining anaerobic ammonium oxidizing bacteria under low temperature conditions, belonging to the field of sewage treatment. Background technique [0002] The construction of urban sewage treatment facilities in my country has entered a stage of leapfrog development since the "Eleventh Five-Year Plan": the number of sewage treatment plants and the total annual treatment volume have continued to increase, the treatment capacity and sewage treatment rate have increased rapidly, and more and more sewage plants have discharged water The water quality has reached the national level A discharge standard stably. However, there are still many deficiencies in the design and operation of my country's existing sewage treatment plants, such as: (1) high water and power consumption per unit of sewage treatment; (2) low recycling rate of sewage; (3) traditional activated sludge A large amount of greenhouse gases rep...

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