CN115403126A - Mine acid wastewater neutralization treatment circulation system - Google Patents
Mine acid wastewater neutralization treatment circulation system Download PDFInfo
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- CN115403126A CN115403126A CN202211209954.4A CN202211209954A CN115403126A CN 115403126 A CN115403126 A CN 115403126A CN 202211209954 A CN202211209954 A CN 202211209954A CN 115403126 A CN115403126 A CN 115403126A
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- treatment
- circulation system
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- 239000002253 acid Substances 0.000 title claims abstract description 49
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 47
- 239000002351 wastewater Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000002893 slag Substances 0.000 claims abstract description 52
- 239000013049 sediment Substances 0.000 claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 235000019738 Limestone Nutrition 0.000 claims abstract description 11
- 239000006028 limestone Substances 0.000 claims abstract description 11
- 230000002378 acidificating effect Effects 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 239000011435 rock Substances 0.000 abstract description 5
- 230000003472 neutralizing effect Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical group [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000013547 stew Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a neutralization treatment circulating system for acid mine wastewater, which comprises a treatment tank and a reinforcement cage filled with limestone rock lumps and arranged in the treatment tank, wherein two sides of the bottom of the treatment tank are provided with convex steps, the upper part of one end of the treatment tank is provided with a water inlet, the upper part of the other end of the treatment tank is provided with a water outlet, and the bottom of the treatment tank is provided with a slag discharge port; two ends of the bottom of the reinforcement cage are respectively supported on the two steps, and a sediment zone is formed between the bottom of the reinforcement cage and the bottom of the treatment tank; the wastewater in the acid water tank is circularly neutralized between the acid water tank and the neutralization treatment tank until the pH value reaches a target value, and neutralization slag generated in the process is precipitated at the bottom of the treatment tank and is conveniently discharged from a slag discharge port.
Description
Technical Field
The invention relates to a neutralization treatment circulating system for acidic mine wastewater, and belongs to the field of mine treatment in the geological engineering industry.
Background
The existing mine acidic wastewater treatment method is a multi-purpose neutralization method, and the method is a method for removing metal ions in mine acidic wastewater by adding an alkaline neutralizing agent into an acid water tank to perform neutralization reaction with the acidic wastewater and simultaneously forming hydroxide or carbonate precipitate with low solubility. The common neutralizing agent is soda lime, slaked lime, fly ash, calcium carbonate, blast furnace slag, dolomite, na 2 CO 3 NaOH, and the like. However, by a neutralization method of adding an alkaline neutralizing agent, the amount of the generated neutralized slag after general treatment is large, and the generated neutralized slag is mixed with the original acidic wastewater in the acid water tank, so that the neutralized slag is difficult to remove due to high water content and is easy to cause secondary pollution.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a neutralization treatment circulating system for mine acidic wastewater, wherein neutralization slag is not mixed with wastewater in an acid water tank, and the neutralization treatment circulating system is convenient for treating the neutralization slag.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a neutralizing treatment circulating system for mine acidic wastewater comprises an acid water tank, a treatment tank, a water channel and a water pump, wherein the treatment tank and the acid water tank are respectively provided with a water inlet and a water outlet, the water inlet of the treatment tank and the water outlet of the acid water tank are respectively connected through the water channel, and the water pump is arranged at least at the water inlet of the treatment tank to enable the acidic wastewater to circularly flow between the acid water tank and the treatment tank; the treatment tank is internally provided with a replaceable sieve wall which can allow the acid wastewater which circularly flows to pass through, the sieve wall is internally provided with a material for carrying out neutralization reaction with the acid wastewater, a sediment zone is formed between the bottom end of the sieve wall and the tank bottom, and one side of the sediment zone, which corresponds to the water outlet, is provided with a slag discharge port; and the water inlet and the water outlet of the treatment tank are both higher than the sediment zone.
The technical scheme is further designed as follows: the sieve walls are arranged in the direction perpendicular to the water flow, and the sieve walls are distributed in the front-back direction of the water flow.
The treatment tank is characterized in that two side walls corresponding to the width direction of the screen wall are respectively provided with a groove matched with the thickness of the screen wall, and the screen wall is arranged in the treatment tank in a replaceable manner through the grooves inserted into the two side walls.
The bottom of the treatment tank is provided with steps on the tank side wall corresponding to the groove, and the left end and the right end of the screen wall are supported on the steps corresponding to the tank side wall.
The screen wall comprises a steel reinforcement cage and limestone rock blocks filled in the steel reinforcement cage.
And a lifting rib is arranged at the top of the reinforcement cage.
The particle size of the limestone lump stone is 3-5cm.
The treatment tank is a rectangular tank, and the water outlets and the slag discharge ports are arranged in a staggered mode in the horizontal direction.
The treatment system further comprises a slag pump, wherein the slag pump is arranged on one side of the slag discharge port and used for pumping out the neutralized slag in the slag settling zone.
The capacity of the treatment tank is smaller than that of the acid water tank
The invention has the beneficial effects that:
the invention designs a mine acidic wastewater neutralization treatment circulating system which is used for independently treating mine acidic wastewater, wastewater in an acid water tank is circularly neutralized between the acid water tank and a treatment tank until a PH value reaches a target value, and neutralized slag generated in the process is precipitated in a slag settling area at the bottom of the treatment tank, so that manual treatment and control are facilitated.
The bottom of the neutralization treatment tank is provided with a sediment zone for deposition and passing of the neutralization slag, one end corresponding to the sediment zone is also provided with a slag discharge port, the neutralization slag deposited at the bottom of the treatment tank can be discharged through the slag discharge port for centralized treatment, is not mixed with acidic wastewater in the primary acid water tank, and is only mixed with water in the treatment tank.
The screen wall provided with the neutralizing material in the invention is of a replaceable structure, and can be replaced after the neutralizing efficiency is reduced after the screen wall is used for a period of time.
Drawings
FIG. 1 is a top view of an embodiment of the present invention;
FIG. 2 is a front view of an embodiment of the present invention;
FIG. 3 is a schematic view of a side wall groove of a treatment tank according to an embodiment of the present invention;
FIG. 4 is a left side view of the embodiment of FIG. 2;
figure 5 is a schematic view of a screen wall in an embodiment of the invention.
In the figure: 1-a treatment tank, 11-a water inlet, 12-a water outlet, 13-a slag discharge port, 14-a groove, 2-a step, 3-a sieve wall, 31-a lifting rib, 4-a slag pump, 5-a water channel, 6-an acid water tank and 7-a water pump.
Detailed Description
The invention is described in detail below with reference to the drawings and specific embodiments.
Example one
The system for neutralizing and treating acidic mine wastewater of the embodiment comprises an acid water tank 6 and a treatment tank 1 constructed by limestone rock blocks, wherein the treatment tank 1 is in a cuboid shape of 2m wide, 4m long and 2m deep as shown in figure 1. One end of the treatment pool 1 is provided with a water inlet 11, the other end of the treatment pool is provided with a water outlet 12, and the water inlet of the treatment pool 1 and the water outlet of the acid water pool 6 and the water outlet of the treatment pool 1 and the water inlet of the acid water pool 6 are respectively connected.
Three sieve walls 3 which are arranged in parallel are arranged in the treatment tank 1, and the sieve walls 3 are reinforcement cages filled with limestone blocks with the diameter of 3-5cm in the embodiment; the two sides of the bottom of the treatment tank 1 are provided with convex steps 2, the steps are 0.2m wide and 0.6m high, two ends of the bottom of the sieve wall 3 are respectively supported on the steps 2 on the two sides of the bottom of the treatment tank 1, the sieve wall 3 is 1.4m high and 0.2m thick, the width is matched with the distance between two side walls of the treatment tank 1, a gap between limestone blocks in the sieve wall 3 is used for acid water to pass through, and enough contact area with the acid water can be ensured, the structure is shown in figure 5, and a reinforcement cage of the sieve wall 3 is made of corrosion-resistant steel.
The sieve wall 3 is supported on the step 2 so that a sediment zone with the height of 0.6m and the width of 1.6m is formed between the bottom of the sieve wall 3 and the bottom of the treatment tank 1.
As shown in fig. 2, the water inlet 11 and the water outlet 12 of the treatment tank 1 are both disposed at the upper part of the end of the treatment tank, i.e. above the sediment zone, and are higher than the sediment zone, so that the neutralized slag in the sediment zone is not easily taken out of the treatment tank 1 by the acid water circulating in the tank when flowing; the treatment tank 1 is also provided with a slag discharge port 13 at one end of the water outlet 12, and the slag discharge port 13 is arranged at the lower part of the end of the treatment tank and corresponds to the position of the slag settling zone, so that the neutralized slag can be discharged conveniently.
The treatment tank 1 of the embodiment is arranged near an acid water tank 6, and acid water in the acid water tank 6 is pumped to the treatment tank 1 by installing a water pump 7 with proper power at a water inlet 11, so that the acid water is subjected to neutralization reaction with limestone lumps in a sieve wall 3 in the treatment tank 1; if necessary, a water pump can be arranged at the water outlet 12 for pumping water, and the water after the neutralization reaction is discharged back to the acid water tank 6, so that the acid water is circularly neutralized between the treatment tank 1 and the acid water tank 6 until the pH value reaches a target value; the neutralization slag generated in the neutralization process is deposited in a slag settling area of the treatment tank 1, when the accumulated neutralization slag reaches a certain amount, the water outlet is closed, the slag discharge port 13 is opened to discharge the neutralization slag for centralized treatment, or the neutralization slag is pumped out by the slag pump 4 arranged at the slag discharge port 13, and the slag discharge port 13 is circular and is matched with the pipe diameter of the pipeline of the slag pump 4. In the embodiment, the neutralization slag is generated in the treatment tank 1, and because the capacity of the treatment tank 1 is smaller than the capacity of the acid water tank 6, the amount of water mixed with the neutralization slag is small, after the water in the treatment tank is pumped out, the amount of water mixed with the neutralization slag is further reduced, the water content is low, and the treatment is convenient.
In the embodiment, a neutralizing agent such as soda lime, slaked lime, fly ash and the like can be scattered into the neutralizing treatment tank during acid water circulation neutralization so as to increase the neutralization efficiency; at the same time, flocculant can be added to increase the precipitation of heavy metals. The alkali limestone rock, lime, slaked lime, fly ash, flocculating agent and the like used in the embodiment are widely applied chemical raw materials, and the harm to the environment is completely eliminated.
Example two
The structure of the acidic mine wastewater neutralization treatment system is basically the same as that of the embodiment, and the difference is that a lifting rib 31 is arranged at the top of a sieve wall 3 arranged in the treatment tank 1, the acidic mine wastewater neutralization treatment system can be lifted out through the lifting rib 31 for replacement, the lifted-out acidic mine wastewater neutralization treatment system is continuously used after being washed by a high-pressure water gun for surface attachments, or is refilled with new limestone rock lumps for neutralization.
Referring to fig. 3, in this embodiment, a groove 14 matching the width of the sieve wall 3 is formed from the top end to the step on the side wall of the treatment tank 1, and the groove has a height of 1.4m and a width of 0.2m; the two ends of the screen wall 3 are respectively inserted into the grooves 14 on the two side walls of the treatment tank 1, so that the screen wall and the treatment tank 1 are relatively fixed in the water flow direction. This embodiment still can set up two parallel protruding stupefied from top to step department at 1 lateral wall in processing pond, and the distance matches with sieve wall 3 width between two protruding stupefied, is used for replacing the recess, and 3 both ends of will sieving the wall are blocked respectively between two protruding stupefied of 1 both sides wall in processing pond to play the effect of fixed steel reinforcement cage.
Referring to fig. 4, the water outlets 12 and the slag outlets 13 at the end of the treatment tank are arranged in a staggered manner in the horizontal direction, so that the neutralized slag in the slag settling zone can be prevented from being taken out of the treatment tank 1 from the slag outlets 13 when acid water flows.
Referring to fig. 1, in this embodiment, a canal 5 is built at the water inlet 11 and the water outlet 12 of the treatment tank 1, and is communicated with the water outlet and the water inlet of the acid water tank 6 through the canal 5, so as to facilitate water diversion and drainage, and the terrain of the treatment tank 1 is higher than the terrain of the acid water tank, so that water in the acid water tank does not flow into the treatment tank within a normal time, and the water outlet 12 of the treatment tank 1 may not be provided with a water pump, and water in the treatment tank 1 can flow back to the acid water tank 6 from the water outlet 12 through the canal 5 under the action of gravity after flowing through the water outlet 12.
The processing system of this embodiment is in the circulation and the acid water in-process, can close the water pump after 1 interior water is full of processing pool, a period of time stews, treats that neutralization sediment deposits the sediment district after, with water withdrawal acid water tank 6, then draws water in 6 to processing pool 1 from acid water tank again, so operate repeatedly, can further avoid neutralization sediment to follow circulation rivers and get into in the acid water tank from delivery port 12.
The technical solutions of the present invention are not limited to the above embodiments, and all technical solutions obtained by using equivalent substitution modes fall within the scope of the present invention.
Claims (10)
1. The utility model provides a mine acid waste water neutralization treatment circulation system, includes the sour pond, its characterized in that: the device is characterized by also comprising a treatment tank, a water channel and a water pump, wherein the treatment tank and the acid water tank are respectively provided with a water inlet and a water outlet, the water inlet of the treatment tank and the water outlet of the acid water tank and the water outlet of the treatment tank and the water inlet of the acid water tank are respectively connected by the water channel, and the water pump is arranged at least at the water inlet of the treatment tank so that the acidic wastewater circularly flows between the acid water tank and the treatment tank; the treatment tank is internally provided with a replaceable sieve wall which can allow the circularly flowing acidic wastewater to pass through, the sieve wall is internally provided with a material for carrying out neutralization reaction with the acidic wastewater, a sediment zone is formed between the bottom end of the sieve wall and the bottom of the tank, and one side of the sediment zone corresponding to the water outlet is provided with a slag discharge port; and the water inlet and the water outlet of the treatment tank are both higher than the sediment zone.
2. The mine acidic wastewater neutralization treatment circulation system of claim 1, wherein: the sieve walls are arranged in the direction perpendicular to the water flow, and the sieve walls are distributed front and back in the water flow direction.
3. The mine acidic wastewater neutralization treatment circulation system of claim 2, characterized in that: the treatment tank is characterized in that two side walls corresponding to the width direction of the screen wall are respectively provided with a groove matched with the thickness of the screen wall, and the screen wall is arranged in the treatment tank in a replaceable manner through the grooves inserted into the two side walls.
4. The mine acidic wastewater neutralization treatment circulation system of claim 3, characterized in that: the bottom of the treatment tank is provided with steps on the tank side wall corresponding to the groove, and the left end and the right end of the screen wall are supported on the steps corresponding to the tank side wall.
5. The mine acidic wastewater neutralization treatment circulation system of claim 4, wherein: the screen wall comprises a reinforcement cage and limestone blocks filled in the reinforcement cage.
6. The mine acidic wastewater neutralization treatment circulation system of claim 5, characterized in that: and a lifting rib is arranged at the top of the reinforcement cage.
7. The mine acidic wastewater neutralization treatment circulation system according to claim 6, characterized in that: the particle size of the limestone lump stone is 3-5cm.
8. The mine acidic wastewater neutralization treatment circulation system according to one of claims 1 to 7, characterized in that: the treatment tank is a rectangular tank, and the water outlet and the slag discharge port are arranged in a staggered manner in the horizontal direction.
9. The mine acidic wastewater neutralization treatment circulation system of claim 8, wherein: the slag extractor is arranged on one side of the slag discharge port and used for extracting the neutralized slag in the slag settling zone.
10. The mine acidic wastewater neutralization treatment circulation system according to claim 9, characterized in that: the capacity of the treatment tank is smaller than that of the acid water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211209954.4A CN115403126A (en) | 2022-09-30 | 2022-09-30 | Mine acid wastewater neutralization treatment circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211209954.4A CN115403126A (en) | 2022-09-30 | 2022-09-30 | Mine acid wastewater neutralization treatment circulation system |
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| Publication Number | Publication Date |
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| CN115403126A true CN115403126A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211209954.4A Pending CN115403126A (en) | 2022-09-30 | 2022-09-30 | Mine acid wastewater neutralization treatment circulation system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101387770B1 (en) * | 2013-09-24 | 2014-04-21 | 경성대학교 산학협력단 | Contact reactor system packed with porous ceramics to treat acid wastewater |
| CN204529490U (en) * | 2015-01-02 | 2015-08-05 | 李宏亮 | A kind of sewage, purification of waste water treatment facility with filtering net and filtering membrane |
| CN204522500U (en) * | 2014-11-24 | 2015-08-05 | 李宏亮 | A kind ofly purify the treatment facility producing waste water in furfural production process |
| CN111620444A (en) * | 2019-12-16 | 2020-09-04 | 南京农业大学 | Method and system for biological treatment of acid mine wastewater and recovery of iron ions |
| CN112624284A (en) * | 2020-12-03 | 2021-04-09 | 贵州大学 | Method for treating acid mine wastewater by using circulating flow |
-
2022
- 2022-09-30 CN CN202211209954.4A patent/CN115403126A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101387770B1 (en) * | 2013-09-24 | 2014-04-21 | 경성대학교 산학협력단 | Contact reactor system packed with porous ceramics to treat acid wastewater |
| CN204522500U (en) * | 2014-11-24 | 2015-08-05 | 李宏亮 | A kind ofly purify the treatment facility producing waste water in furfural production process |
| CN204529490U (en) * | 2015-01-02 | 2015-08-05 | 李宏亮 | A kind of sewage, purification of waste water treatment facility with filtering net and filtering membrane |
| CN111620444A (en) * | 2019-12-16 | 2020-09-04 | 南京农业大学 | Method and system for biological treatment of acid mine wastewater and recovery of iron ions |
| CN112624284A (en) * | 2020-12-03 | 2021-04-09 | 贵州大学 | Method for treating acid mine wastewater by using circulating flow |
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Application publication date: 20221129 |
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