Ionic rare earth ore wastewater treatment device and process

Abstract

The invention relates to the technical field of sewage treatment, in particular to an ionic rare earth ore wastewater treatment device and process. The ionic rare earth ore wastewater treatment devicecomprises a partial denitrification reaction assembly, a short-cut nitrification reaction assembly and an anaerobic ammonia oxidation reaction assembly and a deep denitrification assembly which are communicated in sequence for sequentially carrying out partial denitrification reaction, short-cut nitrification reaction, anaerobic ammonia oxidation reaction and deep denitrification reaction on thewastewater. The method comprises the following steps: firstly, reducing nitrate nitrogen into nitrite nitrogen by utilizing a partial denitrification technology; then carrying out anaerobic ammonia oxidation reaction with ammonium nitrogen to remove ammonia. According to the method, nitrate nitrogen contained in the wastewater is fully utilized and becomes favorable, so that the removal efficiencyof ammonia nitrogen, nitrate nitrogen and total nitrogen is high, the oxygen supply energy consumption in the wastewater treatment process is reduced, an external organic carbon source required by wastewater denitrification can be reduced to the minimum, and the wastewater denitrification treatment cost is remarkably reduced.

Description

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to an ionic rare earth ore wastewater treatment device and process. Background technique

[0002] Ionic rare earth ore is a special rare earth ore. Most of the rare earth metals in the minerals exist in the state of cations and are adsorbed on different types of clay minerals. Traditional mineral processing techniques such as gravity separation, magnetic separation, and flotation Conventional beneficiation methods cannot enrich and recover it. Because ionic rare earth ores are easily destroyed by (NH4) 2 SO 4 Therefore, at present, the mining of ionic rare earth ores mainly realizes recovery through electrolyte exchange to allow ionic phase rare earths to enter the ore leaching agent, wherein the ore leaching agent is ammonium sulfate. However, putting a large amount of ammonium sulfate as a leaching agent in the mining process of ion-type rare earth mines will cause the...

Examples

Embodiment 1

[0054] Such as figure 1 As shown, this embodiment relates to an ion-type rare earth mine wastewater treatment device, including a partial denitrification reaction component 2 , a short-range nitrification reaction component 3 , anammox reaction component 4 , and a deep denitrification component 5 .

[0055] Wherein, the partial denitrification reaction assembly 2 is connected to the outlet of the raw water pool 1, and the partial denitrification reaction assembly 2 is used for partial denitrification of the wastewater from the raw water pool 1 to reduce nitrate nitrogen to nitrite nitrogen; short-range nitrification The reaction component 3 is connected to the partial denitrification reaction component 2, and the short-range nitrification reaction component 3 is used for short-range nitrification reaction for the wastewater from the partial denitrification reaction component 2 to oxidize a part of ammonia nitrogen to nitrite nitrogen; anaerobic ammonium oxidation reaction The ...

Embodiment 2

[0071] This embodiment relates to an ion-type rare earth mine wastewater treatment process, which includes inoculating activated activated sludge in the ion-type rare earth mine wastewater biological treatment device, and then feeding the wastewater to carry out partial denitrification reaction, short-range nitrification reaction, and anaerobic ammonium oxidation in sequence. reaction, the steps of deep denitrification reaction. Wherein, the ion-type rare earth ore wastewater treatment device is consistent with the embodiment 1.

[0072] Specifically, the partial denitrification reaction includes the following steps: passing the wastewater into the wastewater pH adjustment reaction tank, adding acid solution to the wastewater pH adjustment reaction tank to control the pH of the effluent in the pH adjustment reaction tank to be 8.5-9.0, and then passing the wastewater into the pH adjustment reaction tank. To the partial denitrification reactor, by adding organic carbon source t...

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to an ionic rare earth ore wastewater treatment device and process. Background technique

[0002] Ionic rare earth ore is a special rare earth ore. Most of the rare earth metals in the minerals exist in the state of cations and are adsorbed on different types of clay minerals. Traditional mineral processing techniques such as gravity separation, magnetic separation, and flotation Conventional beneficiation methods cannot enrich and recover it. Because ionic rare earth ores are easily destroyed by (NH4) 2 SO 4 Therefore, at present, the mining of ionic rare earth ores mainly realizes recovery through electrolyte exchange to allow ionic phase rare earths to enter the ore leaching agent, wherein the ore leaching agent is ammonium sulfate. However, putting a large amount of ammonium sulfate as a leaching agent in the mining process of ion-type rare earth mines will cause the...

Examples

Embodiment 1

[0054] Such as figure 1 As shown, this embodiment relates to an ion-type rare earth mine wastewater treatment device, including a partial denitrification reaction component 2 , a short-range nitrification reaction component 3 , anammox reaction component 4 , and a deep denitrification component 5 .

[0055] Wherein, the partial denitrification reaction assembly 2 is connected to the outlet of the raw water pool 1, and the partial denitrification reaction assembly 2 is used for partial denitrification of the wastewater from the raw water pool 1 to reduce nitrate nitrogen to nitrite nitrogen; short-range nitrification The reaction component 3 is connected to the partial denitrification reaction component 2, and the short-range nitrification reaction component 3 is used for short-range nitrification reaction for the wastewater from the partial denitrification reaction component 2 to oxidize a part of ammonia nitrogen to nitrite nitrogen; anaerobic ammonium oxidation reaction The ...

Embodiment 2

[0071] This embodiment relates to an ion-type rare earth mine wastewater treatment process, which includes inoculating activated activated sludge in the ion-type rare earth mine wastewater biological treatment device, and then feeding the wastewater to carry out partial denitrification reaction, short-range nitrification reaction, and anaerobic ammonium oxidation in sequence. reaction, the steps of deep denitrification reaction. Wherein, the ion-type rare earth ore wastewater treatment device is consistent with the embodiment 1.

[0072] Specifically, the partial denitrification reaction includes the following steps: passing the wastewater into the wastewater pH adjustment reaction tank, adding acid solution to the wastewater pH adjustment reaction tank to control the pH of the effluent in the pH adjustment reaction tank to be 8.5-9.0, and then passing the wastewater into the pH adjustment reaction tank. To the partial denitrification reactor, by adding organic carbon source t...

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