CN109111062A - A kind of efficient method for removing heavy metal in tailings reservoir wastewater - Google Patents
A kind of efficient method for removing heavy metal in tailings reservoir wastewater Download PDFInfo
- Publication number
- CN109111062A CN109111062A CN201811307803.6A CN201811307803A CN109111062A CN 109111062 A CN109111062 A CN 109111062A CN 201811307803 A CN201811307803 A CN 201811307803A CN 109111062 A CN109111062 A CN 109111062A
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- Prior art keywords
- heavy metal
- reaction pond
- order reaction
- wastewater
- tailings
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
A kind of efficient method for removing heavy metal in tailings reservoir wastewater, comprising the following steps: (1) waste water is pumped into first order reaction pond；(2) biological agent and calcium hypochlorite are added into first order reaction pond, while controlling the oxidation-reduction potential of solution in 600mV or more；(3) in first order reaction pond after waste water reaction, overflow enters second order reaction pond, while polyacrylamide flocculant being added into second order reaction pond, while giving and at the uniform velocity stirring, accelerated sedimentation separation；(4) it after the reaction of second order reaction pond, realizes and is separated by solid-liquid separation into sedimentation basin, the supernatant after separation enters reuse or outlet after clear water reserviors, and the underflow of sedimentation basin is temporarily stored through storage basin, is then sent to Tailings Dam.Using the method for heavy metal in one kind of the invention efficiently removal tailings reservoir wastewater, treatment process does not generate dangerous solid waste, reduces Solid state fermentation cost, and process flow is simple, the content of heavy metal in waste water is effectively eliminated, realization meets national GB25466-2010 discharge standard.
Description
Technical field
The present invention relates to heavy metals in a kind of industrial wastewater removing heavy metals method more particularly to a kind of removal tailings reservoir wastewater
Method.
Background technique
Environmental pollution caused by the percolate of Pb-Zn tailings library and ecological disruption are a global problems, increasingly by
The attention of people has become a key areas of Research of Environmental Sciences.Heavy metal in Pb-Zn tailings, such as: arsenic, iron, manganese
Deng being difficult to remove once entering in underground reservoir or surface water with percolate, and environmental quality and the mankind can be good for
Kang Zaocheng very big threat, while also exacerbating the crisis of water resource.
Currently, the method for heavy metal mainly has chemical precipitation method, floatation, porous in processing tailings reservoir wastewater both at home and abroad
Substance absorption method, ion-exchange-resin process and functional polymer embrane method etc..Wherein, the most universal for chemical precipitation method, the party
A large amount of chemical agent will be generally added in method, and the form for becoming sediment is precipitated out.After this just determines chemical Treatment
There can be a large amount of secondary pollution, such as the generation of a large amount of waste residues, and the processing of these waste residues there is no preferable processing disposition at present
Method, so all there is huge negative effect to its application in engineering and later sustainable development.In addition, there is also
Arsenic administers the problems such as not up to standard.
Prior art is unstable to the removal of arsenic, and arsenic content is often higher in outer draining that treated and waste residue, and simultaneously
Containing a large amount of heavy metal ion such as iron, manganese, outer draining that treated is also easy to oxidation by air and becomes cloudy, and leads to outlet water colour
National emission standard requirement is not achieved in degree.In addition, prior art treatment process often obtains arsenic content height, and the big danger of the quantity of slag is solid
It is useless, and handle this kind of dangerous waste higher cost.
Summary of the invention
The technical problem to be solved by the present invention is a kind of not only working environment close friend is overcome the deficiencies of the prior art and provide,
Supernatant qualified discharge after separation can be used as industrial water circulation use, and treatment process does not generate dangerous solid waste, reduce useless
The method of heavy metal in the efficient removal tailings reservoir wastewater of Slag treatment cost.
The technical solution adopted by the present invention to solve the technical problems is: a kind of efficiently to remove heavy metal in tailings reservoir wastewater
Method, comprising the following steps:
(1) waste water is pumped into first order reaction pond；
(2) biological agent and calcium hypochlorite are added into first order reaction pond, while controlling the oxidation-reduction potential of solution in 600mV
More than；
(3) in first order reaction pond after waste water reaction, overflow enters second order reaction pond, while polypropylene is added into second order reaction pond
Amide flocculant；
(4) it after the reaction of second order reaction pond, realizes and is separated by solid-liquid separation into sedimentation basin, the supernatant after separation enters reuse after clear water reserviors
Or outlet, the underflow of sedimentation basin are temporarily stored through storage basin, are then sent to Tailings Dam.
Further, the biological agent is the biological solution containing molysite and bacterium.
Further, the addition quality of the biological agent is the 0.02% ~ 0.05% of wastewater quality, the addition matter of calcium hypochlorite
Amount is the 0.03% ~ 0.06% of wastewater quality.
Further, the oxidation reduction potential control is in 600mV ~ 715mv.
Further, the mass ratio of the calcium hypochlorite and biological agent is 1:1 ~ 1.5.
Further, after the second order reaction pond reaction, waste liquid reaction end pH is 6.5 ~ 7.5.
Further, polyacrylamide flocculant is added into second order reaction pond in the step (2), while is at the uniform velocity stirred
It mixes, accelerated sedimentation separation.
The principle that technical solution of the present invention is based primarily upon: the present invention utilizes biological agent and plus calcium hypochlorite Combined Treatment
Mine tailing wastewater, wherein the trivalent arsenic in waste water is oxidized to pentavalent arsenic by calcium hypochlorite, pentavalent arsenic again with the trivalent in biological agent
Iron and functional groups form the high arsenic acid iron complex compound of stability, and obtained slag containing arsenic can directly return to Tailings Dam heap
It deposits.Oxidation-reduction potential in calcium hypochlorite control waste water is added simultaneously makes Mn soluble in waste water in 600mV or more2+、Fe2+
It is oxidized to the Mn of not solvent4+、Fe3+, wherein the lime knot in the ferric hydroxide colloid and calcium hypochlorite that iron is oxidized to form
Conjunction forms large particle sedimentation, solves suspended matter excessive problem.
Compared with the prior art, the advantages of the present invention are as follows: use biological agent and calcium hypochlorite Combined Treatment Tailings Dam
Waste water, wherein As can form more stable compound and enter bed mud, can be fed directly in Tailings Dam as general solid waste, As
More thoroughly, removal efficiency reaches 99% or more for removal.Calcium hypochlorite effectively removes Mn and Fe in waste water, while solving suspension
Object excessive problem.Using a kind of method for efficiently removing heavy metal in tailings reservoir wastewater of the invention, treatment process does not generate danger
Solid waste reduces Solid state fermentation cost, and process flow is simple, effectively eliminates the content of heavy metal in waste water, and realization meets state
Family's GB25466-2010 discharge standard.
Detailed description of the invention
Fig. 1-is the method and process flow chart of heavy metal in a kind of efficiently removal tailings reservoir wastewater of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with illustrate attached drawing and preferred embodiment to the present invention make more comprehensively,
Careful description, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, it is no intended to limit of the invention
Protection scope.
Unless otherwise specified, a variety of materials, reagent, the instrument and equipment etc. used in the present invention can pass through market
It is commercially available or can be prepared by existing method.
Embodiment 1:
The method of heavy metal in a kind of efficiently removal tailings reservoir wastewater of the invention, comprising the following steps: Certain District, Hunan Tailings Dam is useless
Water, Heavy Metals content As 1.10mg/L, Mn 3.654mg/L, Fe 4.632mg/L in waste water, pH=7.02 of waste water are adopted
Waste water is handled with the method for heavy metal in a kind of efficiently removal tailings reservoir wastewater of the present invention as shown in Figure 1, will first be given up
Water is pumped into first order reaction pond；Biological agent is added into first order reaction pond, addition quality is the 0.05% of wastewater quality, and is added
Calcium hypochlorite, addition quality is the 0.03% of wastewater quality, while controlling the oxidation-reduction potential of solution in 716mv；
In first order reaction pond after waste water reaction, overflow enters second order reaction pond, while mass concentration is added into second order reaction pond
For 0.01% polyacrylamide solution, the quality of addition is the 4% of wastewater quality, carries out flocculating setting, while giving at the uniform velocity
Stirring, accelerated sedimentation separation；
After the reaction of second order reaction pond, to realize and be separated by solid-liquid separation into sedimentation basin, the underflow of sedimentation basin is temporarily stored through storage basin,
It is then sent to Tailings Dam, the supernatant after separation enters reuse or outlet after clear water reserviors, and the supernatant after being partially separated is taken to liquefy
Content of beary metal is tested, the removal efficiency of heavy metal is calculated.Experimental result is as shown in table 1:
Table 1: content of beary metal and its removal efficiency after wastewater treatment in embodiment 1
It can be seen that from the experimental result in table 1 using a kind of method for efficiently removing heavy metal in tailings reservoir wastewater of the present invention,
The content of heavy metal As is down to 0.004 mg/L in processed waste water, and the content of Mn is down to 0.023
The content of mg/L, Fe are down to 0.181 mg/L, and wherein the removal efficiency of As and Mn is in the removal efficiency of 99% or more, Fe 95%
More than,.This explanation handles mine tailing wastewater using the method for heavy metal in a kind of efficiently removal tailings reservoir wastewater of the present invention, effectively
The content of heavy metal in waste water is eliminated, realization meets national GB25466-2010 discharge standard.
Embodiment 2:
The method of heavy metal in a kind of efficiently removal tailings reservoir wastewater of the invention, comprising the following steps: Certain District, Hunan Tailings Dam is useless
Water, Heavy Metals content As 2.58mg/L, Mn 4.231mg/L, Fe 5.147mg/L in waste water, pH=6.98 of waste water are adopted
Waste water is handled with the method for heavy metal in a kind of efficiently removal tailings reservoir wastewater of the present invention as shown in Figure 1, will first be given up
Water is pumped into first order reaction pond；Biological agent is added into first order reaction pond, addition quality is the 0.03% of wastewater quality, and is added
Calcium hypochlorite, addition quality is the 0.02% of wastewater quality, while controlling the oxidation-reduction potential of solution in 702mv；Level-one is anti-
In Ying Chi after waste water reaction, overflow enters second order reaction pond, at the same be added into second order reaction pond mass concentration be 0.01% it is poly-
Acrylamide solution, the quality of addition is the 4% of wastewater quality, while giving and at the uniform velocity stirring, accelerated sedimentation separation；Second level is anti-
It after answering pond to react, realizes and is separated by solid-liquid separation into sedimentation basin, the underflow of sedimentation basin is temporarily stored through storage basin, is then sent to
Tailings Dam, the supernatant after separation enter reuse or outlet after clear water reserviors, and the chemical examination heavy metal of the supernatant after being partially separated is taken to contain
Amount, calculates the removal efficiency of heavy metal.Experimental result is as shown in table 2:
Table 2: content of beary metal and its removal efficiency after wastewater treatment in embodiment 2
By 2 experimental result of table it is found that handling it using the method for heavy metal in a kind of efficiently removal tailings reservoir wastewater of the present invention
Its tailings reservoir wastewater, equally can efficient heavy-metal ion removal.
Claims (7)
1. a kind of method of heavy metal in efficiently removal tailings reservoir wastewater, which comprises the following steps:
(1) waste water is pumped into first order reaction pond；
(2) biological agent and calcium hypochlorite are added into first order reaction pond, while controlling the oxidation-reduction potential of solution in 600mV
More than；
(3) in first order reaction pond after waste water reaction, overflow enters second order reaction pond, while polypropylene is added into second order reaction pond
Amide flocculant；
(4) it after the reaction of second order reaction pond, realizes and is separated by solid-liquid separation into sedimentation basin, the supernatant after separation enters reuse after clear water reserviors
Or outlet, the underflow of sedimentation basin are temporarily stored through storage basin, are then sent to Tailings Dam.
2. a kind of method for efficiently removing heavy metal in tailings reservoir wastewater according to claim 1, which is characterized in that the life
Object preparation is a kind of biological solution containing molysite and bacterium.
3. a kind of method for efficiently removing heavy metal in tailings reservoir wastewater according to claim 1, which is characterized in that the life
The addition quality of object preparation is the 0.02% ~ 0.05% of wastewater quality, and the addition quality of calcium hypochlorite is the 0.01% of wastewater quality
~0.03%。
4. a kind of method for efficiently removing heavy metal in tailings reservoir wastewater according to claim 1, which is characterized in that the oxygen
Change reduction potential control in 600mV ~ 715mv.
5. a kind of any one method for efficiently removing heavy metal in tailings reservoir wastewater, feature exist according to claim 1 ~ 4
In the mass ratio of the calcium hypochlorite and biological agent is 1:1 ~ 1.5.
6. a kind of any one method for efficiently removing heavy metal in tailings reservoir wastewater, feature exist according to claim 1 ~ 4
In after the reaction of second order reaction pond, waste liquid reaction end pH is 6.5 ~ 7.5.
7. a kind of any one method for efficiently removing heavy metal in tailings reservoir wastewater, feature exist according to claim 1 ~ 4
It is stirred while polyacrylamide flocculant is added in, the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307803.6A CN109111062A (en) | 2018-11-05 | 2018-11-05 | A kind of efficient method for removing heavy metal in tailings reservoir wastewater |
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| CN201811307803.6A CN109111062A (en) | 2018-11-05 | 2018-11-05 | A kind of efficient method for removing heavy metal in tailings reservoir wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110845103A (en) * | 2019-12-17 | 2020-02-28 | 河南省地质环境规划设计院有限公司 | Heavy metal polluted river bottom mud treatment method |
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