Ionic rare earth mine ammonia nitrogen tail water denitrification treatment device and treatment method

Abstract

An ionic rare earth mine wastewater treatment device comprises a raw water tank, a pretreatment assembly, a nitrification reaction assembly, a short-cut denitrification reaction assembly and an anaerobic ammonia oxidation reaction assembly, wherein the pretreatment assembly is communicated with an outlet of the raw water tank, the nitrification reaction assembly is communicated with the pretreatment assembly through a first centrifugal pump, the short-cut denitrification reaction assembly is communicated with the nitrification reaction assembly, the short-cut denitrification reaction assembly is communicated with the pretreatment assembly through a second centrifugal pump, the anaerobic ammonia oxidation reaction assembly is communicated with the short-cut denitrification reaction assembly, and the anaerobic ammonia oxidation reaction assembly is used for carrying out anaerobic ammonia oxidation reaction and denitrification reaction on the wastewater from the short-cut denitrification reaction assembly. According to the device, by coupling the assemblies and setting the arrangement sequence of the assemblies and the distribution proportion of wastewater, the realization difficulty of an anaerobic ammonia oxidation denitrification process is reduced, the device is easy to control and realize, meanwhile, the energy consumption and organic carbon source consumption in the wastewater denitrification process can be reduced to the maximum extent, and the treatment cost of the wastewater denitrification process is remarkably saved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an ion-type rare earth mine wastewater treatment device and method. [0002] technical background [0003] The mining method of ionic rare earth ore is in-situ leaching, and ammonium sulfate is injected into the ore deposit as a leaching agent for leaching and recovery of rare earth. In the production of in-situ leaching and extraction of rare earths, the injected ammonium sulfate leaching agent still remains in the deposit soil except for most of the recovered rare earth mother liquor. Under the leaching effect of atmospheric rainfall, the mined rare earth mines will continuously leach NH for a long period of time. 4 + , NO 3 - , Ammonia-nitrogen tail water from rare earth mines is formed, and the water environment pollution problem of the basin is prominent. Therefore, it is necessary to denitrify the ammonia-nitrogen tail water of ion-type rare earth mines. [0...

AI Technical Summary

Problems solved by technology

Application number CN202010026741.2 proposes a new biological denitrification device and process for short-range denitrification / short-range nitrification / anammox / denitrification ionic rare earth mine ammonia nitrogen wastewater. Compared with the traditional nitrification / denitrification denitrification process, it has huge advantages. cost advantage, but there are also the following insurmountable problems: First, the stability of short-cut nitrification is difficult to control, resulting in the long-term stability of nitrite accumulation is difficult to maintain; It will have an adverse effect on the next treatment link, short-range nitrification; third, when the short-range nitrification and anammox process are connected in series, the short-range nitrification reaction is not easy to control so that it can reach the concentration of ammonia nitrogen required by the anammox reaction and the concentration of nitrite. Appropriate ratio makes the short-cut nitrification / anammox process difficult to carry out stably, which affects the stability and efficiency of the anammox denitrification reaction, and the engineering implementation of the process is very difficult

Images