CN102701517B - Method for jointly treating acid mine wastewater by using organic matter and carbonate rock - Google Patents
Method for jointly treating acid mine wastewater by using organic matter and carbonate rock Download PDFInfo
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- CN102701517B CN102701517B CN201210146849.0A CN201210146849A CN102701517B CN 102701517 B CN102701517 B CN 102701517B CN 201210146849 A CN201210146849 A CN 201210146849A CN 102701517 B CN102701517 B CN 102701517B
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Abstract
The invention discloses a method for jointly treating acid mine wastewater by using organic matter and carbonate rock. A first-stage pretreatment area (1) is a container which is divided into left and right parts, the bottoms of the left and right parts are communicated, one side of the container is filled with organic matter filler, and the other side of the container is filled with carbonate rock filler; wastewater firstly contacts with the organic matter, the principle that the growth of aerobic microorganisms needs to consume dissolved oxygen is used, so after acid mine wastewater passes through the organic matter, the dissolved oxygen in the wastewater is removed, and an oxygen-free condition is formed; the carbonate rock is used to adjust pH under the oxygen-free condition, so the voids of the filler can be prevented from being blocked by the Fe(OH)3flocs rapidly generated in a reaction area; water flows from the first-stage pretreatment area (1) to enter multistage tandem reaction areas (2), each reaction area (2) is the same as the first-stage pretreatment area (1) in the structure and the contents, wastewater is re-aerated in the process that the wastewater enters a sedimentation tank from the carbonate rock reaction area through a natural drop way. The method is good in effect, low in investment and low in the cost of wastewater treatment.
Description
Technical field
The invention belongs to technical field of waste water processing, relate in particular to a kind of method for the treatment of of acidic wastewater.
Background technology
Coal, as one of most important energy, along with a large amount of exploitations of coal, creates a series of environmental problem.Wherein, acid mine drainage (AMD) is exactly an outstanding environmental problem, AMD has the strong feature of low ph value, high salinity and corrodibility, and carries plurality of heavy metal element and harmful chemical, causes local water, native environment and the ecosystem to be subject to serious destruction.A large amount of discarded small coal mine (ore deposit) quantity is many, distribution is wide, and the usual flow of mine drainage is less, pH value is lower (about 2 ~ 3), the AMD pollution time is long, intractability greatly, to environment and anthropogenic influence serious.
At present, the method processing AMD mainly contains neutralisation, sulphide precipitation, artificial swamp method etc.Neutralisation is widely used in AMD process as the easy reliable method of one, but the neutralization reagent amount consumed is large, can produce a large amount of mud, easily cause secondary pollution to environment; Sulphide precipitation removal effect is good, but pH value is difficult to control, and sulfide precipitation agent is more expensive, and processing cost is high; Artificial swamp method is widely used for processing acid mine drainage in some developed countries, and this method less investment, working cost are low, convenient management, but floor space is large, impact by environmental factors is obvious, and when acidity is higher, improvement wetland method process AMD has certain limitation.For this reason people to the treatment process of acid wastewater in mine in updating and exploring, China Patent Publication No. CN1618742 was on 05 25th, 2005, disclose one " method for the treatment of nonferrons metal mine acidic waste water source ", it utilizes the refuse treatment of wastes with processes of wastes against one another produced in nonferrous metal mine ore dressing process, but this kind of method is for nonferrous metal mine, there is certain limitation; China Patent Publication No. CN1508079 was on 06 30th, 2004, disclose one and " prevent the method for mine from generating acid waste water ", milk of lime is utilized to carry out saturated spray to mine surrounding, water-proof material is laid on its surface, the method can administer mine wastewater from source, but, there is certain risk in performance difficulty; China Patent Publication No. CN1418831 was on 05 21st, 2003, disclose " a kind of method processing acidic waste-water contg. nonferrous metals ", its method is that one section of limestone vegetation adds two sections of bodied ferric sulfate precipitation process acidic waste-water contg. nonferrous metals, and this method sludge quantity is comparatively large, easily produces secondary pollution.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming and the one that provides effective, invest low, cost for wastewater treatment is low, utilizes method that is organic and carbonatite combination treatment acid wastewater in mine.
Utilize a method for organic matter and carbonatite combination treatment acid wastewater in mine, comprise chopped-off head pretreating zone (1), the reaction zone (2) of plural serial stage and final stage precipitation process (3); First colliery acid effluent enters chopped-off head pretreating zone (1); Chopped-off head pretreating zone (1) for left and right separate, the container of bottom UNICOM, side loads organic filler, and opposite side loads carbonatite filler; Waste water first contacts with organic matter and makes good use of the principle that oxygen animalcule growth needs consumes dissolved oxygen, after making acid wastewater in mine pass through organic matter, the dissolved oxygen in waste water is removed, forms anaerobic state; Carbonatite carries out pH regulator under anaerobic situation, makes to avoid in reaction zone generating Fe (OH) fast
3flco blocking filler space; Chopped-off head pretreating zone (1) water outlet, enter the reaction zone (2) of plural serial stage, each reaction zone (2) structure is identical with chopped-off head pretreating zone (1) with content, waste water is entered the process of settling tank by the mode that naturally drops from carbonatite reaction zone and carries out reoxygenation, makes Fe
2+be converted into Fe
3+rear formation Fe (OH)
3flco forms precipitation and removes in settling tank.
The method of claim 1, it is characterized in that: the reaction zone (2) of chopped-off head pretreating zone (1), plural serial stage and final stage precipitation process (3) bottom are equipped with V-type mud and store up district, collect the mud of reactive deposition, mud stores up bottom district and is provided with shore pipe, and mud is discharged by shore pipe; Mud stores up between district and reaction zone and is provided with grid type base plate.
The present invention compared with prior art, as can be known from the above technical solutions, main reaction region, mainly make use of the principle that growth of aerobic microorganisms needs to consume dissolved oxygen, after making acid wastewater in mine pass through organic reaction tank, the dissolved oxygen in waste water is removed, form anaerobic state; Carbonatite carries out pH regulator under anaerobic situation, makes to avoid in reaction zone producing Fe (OH) 3 flco blocking filler space fast; Waste water after pH raises carries out reoxygenation before entering settling tank, forms Fe (OH) 3 flco and in settling tank, form precipitation and remove after making Fe2+ be converted into Fe3+.By multiple-stage treatment, mine wastewater is circulated the stages such as entering anaerobic-aerobic-precipitation, reaches the object of this mine wastewater of process.
It is higher that present method goes out alkalinity of water, and pH average can reach more than 6; Fine to the removal effect of iron, influent concentration is when about 70mg/L, and iron clearance can reach more than 85%; When in intaking, manganese concentration is near 17mg/L, about can half being removed; In addition, the method also has good result to the pollutent such as copper, zinc, cadmium removed in acid mine drainage.Because carbonatite is cheap and easy to get, one-time investment, capital cost are low, thus can reduce the processing cost of waste water to a great extent; In sum, present method acid neutralization capacity is strong, it is low to invest, the production cycle is long, working cost is low, convenient management, removes the respond well of the pollution substances such as iron, manganese, copper, lead, zinc, cadmium, effectively can improve the Current Situation of Eco-environment in mining area, have good application prospect in carbonate rock area.
Accompanying drawing explanation
Fig. 1 is the structural representation using baffled reflection chamber of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1-10
See Fig. 1, a kind of method utilizing organic matter and carbonatite combination treatment acid wastewater in mine, for reaction tank shown in Fig. 1, comprises chopped-off head pretreating zone 1, the reaction zone 2 of plural serial stage and final stage precipitation process 3.
Near hole, colliery, select one block of soil having certain slope, be convenient to utilize action of gravity to make colliery acid effluent enter chopped-off head pretreating zone 1; Chopped-off head pretreating zone 1 for left and right separate, the container of bottom UNICOM, side loads organic filler, opposite side loads carbonatite filler, and (the carbonatite particle diameter of employing is about about 20 ~ 40mm, particle diameter mainly blocks relevant with stone, water engaging surface sum, if pH is too low, is easy to produce precipitation and then can adopts more large-size particles); Waste water first contacts with organic matter and makes good use of the principle that oxygen animalcule growth needs consumes dissolved oxygen, after making acid wastewater in mine pass through organic matter, the dissolved oxygen in waste water is removed, forms anaerobic state; Carbonatite carries out pH regulator under anaerobic situation, makes to avoid in reaction zone generating Fe (OH) fast
3flco blocking filler space; Chopped-off head pretreating zone 1 water outlet, enters the reaction zone 2 of plural serial stage, and each reaction zone 2 structure is identical with chopped-off head pretreating zone 1 with content, and waste water is entered the process of settling tank by the mode that naturally drops from carbonatite reaction zone and carries out reoxygenation, makes Fe
2+be converted into Fe
3+rear formation Fe (OH)
3flco forms precipitation and removes in settling tank.
By multiple-stage treatment, mine wastewater is circulated the stages such as entering anaerobic-aerobic-precipitation, reaches the object of this mine wastewater of process.The organic organic matter for being easy to get near mine can be animal excrement, stalk, also can be the different sourcess such as the residual active sludge of city domestic sewage treatment plant but the high organic waste of organic content.
Be equipped with V-type mud bottom the reaction zone 2 of chopped-off head pretreating zone 1, plural serial stage and final stage precipitation process 3 and store up district, collect the mud of reactive deposition, mud stores up bottom district and is provided with shore pipe, and mud is discharged by shore pipe; Mud stores up between district and reaction zone and is provided with grid type base plate, and mainly play the effect supporting reaction medium and discharge settled sludge smoothly, mesh size is determined according to the size of reaction medium particle;
The result of this method ten embodiments is utilized to see the following form:
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. utilize a method for organic matter and carbonatite combination treatment acid wastewater in mine, it is characterized in that, comprise chopped-off head pretreating zone (1), the reaction zone (2) of plural serial stage and final stage precipitation process (3); First acid wastewater in mine enters chopped-off head pretreating zone (1); Chopped-off head pretreating zone (1) for left and right separate, the container of bottom UNICOM, side loads organic filler, and opposite side loads carbonatite filler; Waste water first contacts with organic matter and makes good use of the principle that oxygen animalcule growth needs consumes dissolved oxygen, after making acid wastewater in mine pass through organic matter, the dissolved oxygen in waste water is removed, forms anaerobic state; Carbonatite carries out pH regulator under anaerobic situation, makes to avoid in reaction zone generating Fe (OH) fast
3flco blocking filler space; Chopped-off head pretreating zone (1) water outlet, enter the reaction zone (2) of plural serial stage, each reaction zone (2) structure is identical with chopped-off head pretreating zone (1) with content, waste water is entered the process of settling tank by the mode that naturally drops from carbonatite reaction zone and carries out reoxygenation, makes Fe
2+be converted into Fe
3+rear formation Fe (OH)
3flco forms precipitation and removes in settling tank.
2. the method for claim 1, it is characterized in that: the reaction zone (2) of chopped-off head pretreating zone (1), plural serial stage and final stage precipitation process (3) bottom are equipped with V-type mud and store up district, collect the mud of reactive deposition, mud stores up bottom district and is provided with shore pipe, and mud is discharged by shore pipe; Mud stores up between district and reaction zone and is provided with grid type base plate.
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| CN201210146849.0A CN102701517B (en) | 2012-05-14 | 2012-05-14 | Method for jointly treating acid mine wastewater by using organic matter and carbonate rock |
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| CN201210146849.0A CN102701517B (en) | 2012-05-14 | 2012-05-14 | Method for jointly treating acid mine wastewater by using organic matter and carbonate rock |
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| CN102701517B true CN102701517B (en) | 2015-02-18 |
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| CN107601690A (en) * | 2017-11-14 | 2018-01-19 | 湖南中大经纬地热开发科技有限公司 | A kind of staged classification water inlet sewage disposal system |
| CN111620444B (en) * | 2019-12-16 | 2021-09-24 | 南京农业大学 | Method and system for biological treatment of acid mine wastewater and recovery of iron ions |
| CN112830635B (en) * | 2021-01-19 | 2022-05-17 | 吉林大学 | Physical, chemical and biological combined treatment device and method for acidic wastewater |
| CN116655182B (en) * | 2023-07-05 | 2024-05-03 | 贵州大学 | Treatment device and treatment method for waste mine acidic wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037268A (en) * | 2007-04-20 | 2007-09-19 | 合肥工业大学 | Method for restoring mine entironment |
| CN101693567A (en) * | 2009-10-09 | 2010-04-14 | 贵州大学 | Method for treating acid mine waste water by utilizing carbonatite |
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| US20090119980A1 (en) * | 2007-11-08 | 2009-05-14 | Howard Walker | Abandoned mine discharge algae clean up |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037268A (en) * | 2007-04-20 | 2007-09-19 | 合肥工业大学 | Method for restoring mine entironment |
| CN101693567A (en) * | 2009-10-09 | 2010-04-14 | 贵州大学 | Method for treating acid mine waste water by utilizing carbonatite |
Non-Patent Citations (1)
| Title |
|---|
| 有氧/无氧被动处理煤矿酸性废水的实验研究;张瑞雪等;《矿物岩石地球化学通报》;20110407;第30卷;第473页第3小节 * |
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