CN216377818U - Acid mine waste water pollutes prosthetic multiunit passive processing apparatus - Google Patents
Acid mine waste water pollutes prosthetic multiunit passive processing apparatus Download PDFInfo
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- CN216377818U CN216377818U CN202120765506.7U CN202120765506U CN216377818U CN 216377818 U CN216377818 U CN 216377818U CN 202120765506 U CN202120765506 U CN 202120765506U CN 216377818 U CN216377818 U CN 216377818U
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Abstract
The utility model relates to the technical field of wastewater treatment, in particular to a multi-unit passive treatment device for acid mine wastewater pollution remediation. The device comprises a mixer-settler, a vertical flow anaerobic reaction column and an artificial wetland which are connected in sequence; quartz sand is filled at the top end and the bottom end in the vertical flow anaerobic reaction column, a large-particle multi-aperture substrate is filled in the middle part, and sulfate reducing bacteria are inoculated in the large-particle multi-aperture substrate; the artificial wetland is filled with a mixed matrix and a plurality of aquatic plants. The acid mine wastewater can be efficiently and stably treated by constructing a mixed clarification tank, a vertical flow anaerobic reaction column and an artificial wetland multi-unit system. The mixed matrix prevents blockage and provides good attachment carriers for microorganisms, thereby being beneficial to the growth and enrichment of sulfate reducing bacteria and various microorganisms; the device can thoroughly treat various pollutants, has small risk of secondary pollution, and is a multi-unit treatment device with low cost and environmental friendliness.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a multi-unit passive treatment device for acid mine wastewater pollution remediation.
Background
The information in this background section is only for enhancement of understanding of the general background of the utility model and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Due to the mining activities of high sulfur mines, the associated acidic mine wastewater pollution has become a serious global environmental problem. If the waste water is directly discharged without being treated, the high-concentration heavy metal, the low pH value and a large amount of sulfate in the acid mine waste water can cause serious pollution to water, soil and surrounding ecosystems. The treatment method of the acid mine wastewater can be divided into an active method and a passive method. The active method is generally to add alkaline neutralizing agent such as limestone into the acid mine wastewater, which can reach higher metal precipitation rate at low pH, and has simple operation and convenient management. But the continuous addition of the neutralizing agent is needed, so that the cost is high, a large amount of precipitated sludge is generated, and secondary pollution is easily caused. The passive treatment technology is an ecological, friendly, economical and convenient method, and mainly comprises a wetland method, a sulfate reduction method, an anaerobic lime pit method and the like. Because the passive treatment mainly depends on a natural repair mechanism, continuous material input is not needed, and the method has the advantages of low treatment cost, good treatment effect and the like. The wetland method mainly utilizes the physical, chemical and biological synergistic effects of soil, artificial media, plants and microorganisms to achieve the aim of remediation. The sulfate reduction method oxidizes organic carbon by sulfate reducing bacteria, reduces sulfate into sulfide, and precipitates sulfide generated by reaction with heavy metal, and simultaneously increases pH. But the sulfate reducing bacteria have poor acid resistance, and the activity of the acid mine wastewater is reduced and even the acid mine wastewater is dead; in addition, the continuous supply of effective carbon sources for the sulfate-reducing bacteria is also a key problem. At present, solid wastes such as straws, plant dead branches and fallen leaves and the like are added to provide a carbon source for sulfate reducing bacteria, but the excessive organic pollutants such as COD (chemical oxygen demand), ammonia nitrogen and the like released by the solid wastes are easy to cause secondary pollution.
Therefore, the development of a treatment method for treating the acidic mine wastewater with low cost, high efficiency and stable effluent has important significance.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems in the prior art, the utility model aims to provide a multi-unit passive treatment device for acid mine wastewater pollution remediation, which can efficiently and stably treat acid mine wastewater by constructing multi-unit systems such as mixed precipitation clarification pretreatment, vertical flow anaerobic reaction, surface flow artificial wetland and the like.
Specifically, the technical scheme of the utility model is as follows:
the utility model provides a multi-unit passive treatment device for acid mine wastewater pollution remediation, which comprises: the mixed clarification tank, the vertical flow anaerobic reaction column and the artificial wetland are connected in sequence;
quartz sand is filled at the top end and the bottom end in the vertical flow anaerobic reaction column, a large-particle multi-aperture substrate is filled in the middle part, and sulfate reducing bacteria are inoculated in the large-particle multi-aperture substrate;
the artificial wetland is filled with a mixed matrix and a plurality of aquatic plants.
Preferably, the mixing and clarifying tank is connected with the vertical flow anaerobic reaction column through a wastewater inlet pipe; a peristaltic pump is arranged on the wastewater inlet pipe;
preferably, a ball valve and a peristaltic pump are arranged on a pipeline connecting the vertical flow anaerobic reaction column and the artificial wetland;
preferably, the large-particle porous substrate is selected from one or more of limestone, ceramsite and volcanic rock;
preferably, a partition plate is arranged in the artificial wetland, and further preferably, the partition plate is of a vertical baffling type;
preferably, the mixed matrix comprises one or more of soil, limestone, ceramsite, volcanic rock, quartz sand and soft goose stone;
preferably, the aquatic plant comprises one or more of hibiscus mutabilis, lagochilus argyrophyllus, spirodela sessilifolia and alternanthera philoxeroides;
preferably, the mixer-settler is a cylindrical polyethylene barrel with the volume of 15L;
preferably, the vertical flow anaerobic reaction column is 12cm in diameter and 75cm in height, and the top end of the cylindrical reactor is sealed and provided with a sampling pipe with the diameter of 6 mm.
The specific embodiment of the utility model has the following beneficial effects:
the domestic sewage in the mixed clarification tank is used as a neutralizer to be mixed with the acidic mine wastewater in proportion, so that the cost is greatly reduced, the pH value of the alkalescent domestic sewage in the mixed clarification tank is greatly improved, the concentration of heavy metal is reduced, the purpose of treating waste by waste is achieved, and meanwhile, the water quality condition is optimized for subsequent treatment;
the vertical flow anaerobic reaction column and the artificial wetland in the utility model select large-particle mixed substrates, which can prevent blockage and provide good attachment carriers for sulfate reducing bacteria and other microorganisms, and is beneficial to the growth and enrichment of the sulfate reducing bacteria and various microorganisms;
heavy metals in the mixed clarification tank are easy to recover, plants and microorganisms in the vertical flow anaerobic reaction column and the artificial wetland thoroughly treat various pollutants, so that the risk of secondary pollution is low, and the mixed clarification tank is a multi-unit treatment device which is low in cost and is eco-friendly.
The multi-unit passive treatment device for acid mine wastewater pollution remediation can thoroughly treat pollutants, has high treatment efficiency and stable effluent quality.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.
FIG. 1 is a schematic structural diagram of a multi-unit passive treatment device for acid mine wastewater pollution remediation in embodiment 1 of the present invention;
reference numbers in the figures: 1-a mixed clarification tank, 2-a wastewater inlet pipe, 3-a peristaltic pump, 4-a vertical flow anaerobic reaction column inlet pipe, 5-a vertical flow anaerobic reaction column, 6-quartz sand, 7-a large-particle porous substrate, 8-a ball valve, 9-a subsurface flow artificial wetland, 10-a mixed substrate, 11-a partition plate and 12-wetland aquatic plants.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, a multi-unit passive treatment device for acid mine wastewater pollution remediation comprises: the mixed clarification tank 1, the vertical flow anaerobic reaction column 5 and the subsurface flow constructed wetland 9 are connected in sequence; the mixed clarification tank 1 is connected with a vertical flow anaerobic reaction column 5 through a wastewater inlet pipe 2; a peristaltic pump 3 is arranged on the wastewater inlet pipe 2; a ball valve 8 and a peristaltic pump are arranged on a pipeline connecting the vertical flow anaerobic reaction column 5 and the subsurface flow artificial wetland 9;
the subsurface flow type artificial wetland 9 is filled with a mixed matrix 10 and wetland aquatic plants 12; a partition plate 11 is arranged in the subsurface flow type artificial wetland 9, and the partition plate 11 is of a vertical baffling type;
in one or more embodiments, the mixer-settler 1 is a cylindrical polyethylene tank with a volume of 15L; the subsurface flow type constructed wetland 9 is an acrylic cylindrical reactor with the diameter of 12cm and the height of 75cm, the top end of the reactor is sealed, and a sampling pipe with the diameter of 6mm is arranged.
In one or more embodiments, the mixed matrix 10 in the subsurface flow constructed wetland 9 comprises one or more of soil, limestone, ceramsite, volcanic rock, quartz sand and soft goose stone;
in one or more embodiments, the wetland aquatic plants 12 in the subsurface constructed wetland 9 comprise one or more of hibiscus mutabilis, lagochilus lepigone, salvinia spinosa and alternanthera philoxeroides;
the vertical flow anaerobic reaction column 5 and the subsurface flow constructed wetland 9 adopt large-particle mixed matrixes, can prevent blockage and simultaneously provide good attachment carriers for microorganisms, and are favorable for growth and enrichment of sulfate reducing bacteria and various microorganisms; heavy metals in the mixed clarification tank are easy to recover, plants and microorganisms in the vertical flow anaerobic reaction column and the subsurface flow constructed wetland thoroughly treat various pollutants, so that the risk of secondary pollution is low, and the device is a multi-unit treatment device with low cost and ecological friendliness.
When the multi-unit passive treatment device for acid mine wastewater pollution remediation is used, the use method is as follows:
(1) mixing domestic sewage and acid mine wastewater in a volume ratio of 2:1 in a mixer-settler 1 for 1-2 days, increasing the pH value of the acid mine wastewater and precipitating heavy metal ions in the wastewater to obtain a mixed solution;
(2) adding a proper amount of corn straw fermentation liquor into the mixed liquor, then sending the supernatant of the mixed clarification tank into a vertical flow anaerobic reaction column 5, reducing sulfate ions in the acid mine wastewater by sulfate reducing bacteria in the vertical flow anaerobic reaction column 5 to obtain sulfides, forming stable metal sulfide precipitates by the generated sulfides and residual heavy metals, and removing the heavy metals; meanwhile, sulfate reducing bacteria absorb part of ammonia nitrogen and COD as self-nourishment to grow and reproduce; the traditional thinking that solid organic matters are added as a carbon source of sulfate reducing bacteria of a vertical flow anaerobic reaction column is changed, and the release of excessive organic matters such as COD (chemical oxygen demand), ammonia nitrogen and the like is effectively controlled by quantitatively adding corn straw fermentation liquor as the carbon source;
(3) the wastewater treated by the vertical flow anaerobic reaction column 5 is sent into a subsurface flow constructed wetland 9, ammonia nitrogen is converted into nitrate nitrogen through nitrobacteria, and wetland aquatic plants 12 absorb part of the ammonia nitrogen, the nitrate nitrogen and total phosphorus as nitrogen and phosphorus fertilizers to carry out self growth and development; manganese is used as a heavy metal difficult to remove, and hydroxide and carbonate precipitates of manganese are further removed under the oxidation environment at a high pH value. The effluent quality COD, ammonia nitrogen, heavy metals and the like can meet the requirements of sewage discharge standards.
The pH value of the acid mine wastewater is 2.5, and the acid mine wastewater contains sulfate ions and heavy metal ions; the heavy metal ions comprise iron, manganese, zinc, cadmium and copper ions; the concentration of sulfate ions is 1500-2000 mg/L, the concentration of iron ions is 250mg/L, the concentration of manganese ions is 25mg/L, the concentration of zinc ions is 50mg/L, the concentration of cadmium ions is 10mg/L, and the concentration of copper ions is 10 mg/L.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a prosthetic multi-unit passive processing apparatus of acid mine waste water pollution which characterized in that includes: the mixed clarification tank, the vertical flow anaerobic reaction column and the artificial wetland are connected in sequence;
quartz sand is filled at the top end and the bottom end in the vertical flow anaerobic reaction column, a large-particle multi-aperture substrate is filled in the middle part, and sulfate reducing bacteria are inoculated in the large-particle multi-aperture substrate;
the artificial wetland is filled with a mixed matrix and a plurality of aquatic plants.
2. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 1, wherein the mixer-settler is connected to a vertical flow anaerobic reaction column through a wastewater inlet pipe; and a peristaltic pump is arranged on the wastewater inlet pipe.
3. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 1, wherein a ball valve and a peristaltic pump are arranged on a pipeline connecting the vertical flow anaerobic reaction column and the constructed wetland.
4. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 1, wherein a partition is arranged in the artificial wetland.
5. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 4, wherein the partition is of a vertical baffle type.
6. The apparatus for multi-unit passive treatment of acid mine wastewater pollution remediation of claim 1, wherein the aquatic plant comprises one or more of water hibiscus, lagochilus robiniae, sesamela indica, and alternanthera philoxeroides.
7. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 1, wherein the mixer-settler is a cylindrical polyethylene tank with a volume of 15L.
8. The multi-unit passive treatment device for acid mine wastewater pollution remediation of claim 1, wherein the vertical flow anaerobic reaction column is a cylindrical reactor made of acrylic materials and having a diameter of 12cm and a height of 75cm, the top end of the reactor is sealed, and a sampling pipe with a diameter of 6mm is arranged.
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| CN202120765506.7U CN216377818U (en) | 2021-04-14 | 2021-04-14 | Acid mine waste water pollutes prosthetic multiunit passive processing apparatus |
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| CN202120765506.7U CN216377818U (en) | 2021-04-14 | 2021-04-14 | Acid mine waste water pollutes prosthetic multiunit passive processing apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292160A (en) * | 2021-05-31 | 2021-08-24 | 江西省华赣环境技术研发有限公司 | Ecological restoration device and method for treating rare earth tail water according to local conditions |
| CN117585853A (en) * | 2023-12-15 | 2024-02-23 | 广东江铜桃林生态环境有限公司 | Biological low-carbon vulcanization treatment system and treatment method for heavy metal mine acidic wastewater |
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2021
- 2021-04-14 CN CN202120765506.7U patent/CN216377818U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292160A (en) * | 2021-05-31 | 2021-08-24 | 江西省华赣环境技术研发有限公司 | Ecological restoration device and method for treating rare earth tail water according to local conditions |
| CN117585853A (en) * | 2023-12-15 | 2024-02-23 | 广东江铜桃林生态环境有限公司 | Biological low-carbon vulcanization treatment system and treatment method for heavy metal mine acidic wastewater |
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