CN112358132A - Method for treating electroplating wastewater containing cyanogen, zinc and nickel - Google Patents
Method for treating electroplating wastewater containing cyanogen, zinc and nickel Download PDFInfo
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- CN112358132A CN112358132A CN202011230973.6A CN202011230973A CN112358132A CN 112358132 A CN112358132 A CN 112358132A CN 202011230973 A CN202011230973 A CN 202011230973A CN 112358132 A CN112358132 A CN 112358132A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 129
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 238000009713 electroplating Methods 0.000 title claims abstract description 82
- 239000002351 wastewater Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 69
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 66
- 239000011701 zinc Substances 0.000 title claims abstract description 66
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 65
- 239000006228 supernatant Substances 0.000 claims description 47
- 239000002244 precipitate Substances 0.000 claims description 22
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical compound OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- 239000003463 adsorbent Substances 0.000 claims description 12
- 239000000701 coagulant Substances 0.000 claims description 12
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims description 12
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 11
- 241000108664 Nitrobacteria Species 0.000 claims description 9
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 241000304886 Bacilli Species 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 230000001546 nitrifying effect Effects 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 5
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 5
- 241000606124 Bacteroides fragilis Species 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 241000606123 Bacteroides thetaiotaomicron Species 0.000 claims description 3
- 241000588923 Citrobacter Species 0.000 claims description 3
- 241001495394 Nitrosospira Species 0.000 claims description 3
- 241000283984 Rodentia Species 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 229910000990 Ni alloy Inorganic materials 0.000 description 4
- 238000009388 chemical precipitation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000159206 Nitraria Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 241000192121 Nitrospira <genus> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/66—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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- 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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- 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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention belongs to the field of methods for treating electroplating wastewater, and provides a method for treating electroplating wastewater containing cyanogen and zinc and nickel.
Description
Technical Field
The invention belongs to the field of methods for treating electroplating wastewater, and particularly relates to a method for treating electroplating wastewater containing cyanogen, zinc and nickel.
Background
The electroplating wastewater is wastewater generated in the electroplating production process, and with the development of the electroplating process, the discharge amount of the heavy metal electroplating wastewater is continuously increased, and the components are gradually complicated. As is known, the discharge of waste water containing heavy metals per year in the electroplating industry of China reaches 4 hundred million tons. The main pollutants are various metal ions, such as Ni, Zn, Pb, Cu, Hg, Fe, etc. In addition, cyanide-containing wastewater generated by the cyaniding electroplating process is increasing, and the demand for removing heavy metals and cyanogen is becoming obvious.
Among various electroplating wastewater treatment technologies, the chemical precipitation method has the advantages of simple operation process and low treatment cost, so that the chemical precipitation method is the most common electroplating wastewater treatment technology, but due to electroplating process defects and wastewater quality complexity, the stability of pH value and the completeness of chemical precipitation are difficult to ensure, so that the problems of poor treatment effect, secondary treatment and the like of the chemical precipitation method are caused. Therefore, how to improve the pollutant purification effect of the cyanide/zinc-containing electroplating wastewater and overcome the difficult problem that a large amount of dangerous wastes are generated in the traditional heavy metal wastewater precipitation purification process becomes a technical problem which needs to be solved for developing a novel efficient treatment of the cyanide/zinc-containing heavy metal wastewater.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects of the prior art, the invention provides a method for treating electroplating wastewater containing cyanogen, zinc and nickel by a biological method, which decomposes the electroplating wastewater containing cyanogen, zinc and nickel into non-toxic substances to achieve the aim of wastewater treatment, and the content of the invention is as follows:
the invention aims to provide a method for treating electroplating wastewater containing cyanogen, zinc and nickel, which has the technical points that: the method for treating the electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 5-6, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 5-6: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating the mixture A in a centrifuge at the rotating speed of 3000-4000rmp for 20-40min to obtain a supernatant A and a precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to be 6.7-7.2, then treating the supernatant A in gram-negative bacilli for 7-16h, and then separating the supernatant A in a centrifuge at the rotating speed of 3000-;
step four: treating the supernatant B obtained in the third step for 40-80h by nitrobacteria, separating for 20-40min in a centrifuge at the rotating speed of 3000-4000rmp to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the discharge detection reaches the standard.
In some embodiments of the present invention, the mass concentration of the sodium dimethyldithiocarbamate aqueous solution in the first step of the method for treating electroplating wastewater containing cyanogen, zinc and nickel is 70-100 g/L.
In a further embodiment of the present invention, the coagulant aid in step two of the above method for treating electroplating wastewater containing cyanogen, zinc and nickel is at least one of polyacrylamide and polydimethyldiallylammonium chloride.
In some embodiments of the present invention, the flocculant in the second step of the method for treating electroplating wastewater containing cyanogen, zinc and nickel is at least one of an iron-based flocculant and an aluminum-based flocculant.
In some embodiments of the invention, the iron-based flocculant is at least one of ferric chloride, ferric sulfate, polymeric ferric chloride and polymeric ferric sulfate.
In some embodiments of the present invention, the aluminum-based flocculant is at least one of aluminum chloride, aluminum sulfate, polyaluminum chloride and polyaluminum sulfate.
In a further embodiment of the present invention, in the second step of the method for treating electroplating wastewater containing cyanogen, zinc and nickel, the adsorbent is at least one of powdered activated carbon and diatomite.
In a further embodiment of the present invention, the gram-negative bacillus in step three of the above method for treating electroplating wastewater containing cyanogens, zinc and nickel is one of Bacteroides fragilis, Bacteroides thetaiotaomicron and Citrobacter rodent.
In some embodiments of the present invention, the nitrifying bacteria in step four of the above method for treating electroplating wastewater containing cyanogen, zinc and nickel are one of Nitrospira, Nitraria and Nitrosclerospermum.
Compared with the prior art, the invention has the beneficial effects that:
the method adopts a biodegradation mode to remove cyanogen, zinc and nickel in the electroplating wastewater containing cyanogen, zinc and nickel, adopts gram-negative bacilli to oxidize the cyanides in the electroplating wastewater containing cyanogen, zinc and nickel into carbon dioxide, sulfate and ammonia, simultaneously removes heavy metals and nickel from the wastewater by the adsorption of the gram-negative bacilli, adopts nitrobacteria to remove the ammonia generated in the third step, and converts the ammonia into nitrite to be absorbed and utilized by the nitrobacteria.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention will be more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.
Example 1
A method for treating electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 5.5, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 5.5: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating the mixture A in a centrifuge at the rotating speed of 3500rmp for 30min to obtain a supernatant A and a precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to 7.1, then treating the supernatant A in gram-negative bacilli for 12h, and then separating the supernatant A in a centrifuge at 3500rmp rotation speed for 30min to obtain a supernatant B and a precipitate B;
step four: treating the supernatant B obtained in the third step for 60 hours by nitrobacteria, separating the supernatant B in a centrifuge at the rotation speed of 3500rmp for 30min to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the detection reaches the standard.
In the first step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the mass concentration of the sodium dimethyldithiocarbamate aqueous solution is 85 g/L.
The coagulant aid in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is polyacrylamide.
The flocculant in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is an iron-based flocculant.
The iron-based flocculant is ferric chloride.
In the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the adsorbent is powdered activated carbon.
In the third step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the gram-negative bacillus is bacteroides fragilis.
The nitrifying bacteria in the fourth step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel are nitrosospira.
The concentration of zinc in the zinc-nickel alloy electroplating wastewater treated in the embodiment is detected to be 0.14mg/L, the concentration of nickel is detected to be 0.040mg/L, the concentration of cyanogen is detected to be 0.045mg/L, and the effluent is stable.
Example 2
A method for treating electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 5, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 5: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating the mixture A in a centrifuge at the rotating speed of 3000rmp for 40min to obtain supernatant A and precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to 6.7, then treating the supernatant A in gram-negative bacilli for 7 hours, and then separating the supernatant A in a centrifuge at the rotating speed of 3000rmp for 40min to obtain a supernatant B and a precipitate B;
step four: treating the supernatant B obtained in the third step for 40h by nitrobacteria, then separating for 40min in a centrifuge at the rotating speed of 3000rmp to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the detection reaches the standard.
In the first step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the mass concentration of the sodium dimethyldithiocarbamate aqueous solution is 70 g/L.
The coagulant aid in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is poly-dimethyl diallyl ammonium chloride.
The flocculant in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is an aluminum flocculant.
The aluminum flocculant is aluminum chloride.
In the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the adsorbent is at least one of diatomite.
The gram-negative bacillus in the third step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is bacteroides thetaiotaomicron.
The nitrifying bacteria in the fourth step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel are Nitraria bacteria.
The concentration of zinc in the zinc-nickel alloy electroplating wastewater treated in the embodiment is detected to be 0.16mg/L, the concentration of nickel is detected to be 0.042mg/L, the concentration of cyanogen is detected to be 0.06mg/L, and the effluent is stable.
Example 3
A method for treating electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 6, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 6: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating the mixture A in a centrifuge at the rotating speed of 4000rmp for 20min to obtain supernatant A and precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to 7.2, then treating the supernatant A in gram-negative bacilli for 16h, and then separating the supernatant A in a centrifuge at the rotation speed of 4000rmp for 20min to obtain a supernatant B and a precipitate B;
step four: treating the supernatant B obtained in the third step for 80 hours by nitrobacteria, separating for 20min in a centrifugal machine at the rotating speed of 4000rmp to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the detection reaches the standard.
The mass concentration of the sodium dimethyldithiocarbamate aqueous solution in the first step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is 100 g/L.
The coagulant aid in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is poly-dimethyl diallyl ammonium chloride.
The flocculant in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is an aluminum flocculant.
The aluminum flocculant is aluminum sulfate.
In the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the adsorbent is powdered activated carbon.
In the third step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the gram-negative bacillus is rodent citrobacter.
The nitrifying bacteria in the fourth step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel are nitrosophyllum bacteria.
The concentration of zinc in the zinc-nickel alloy electroplating wastewater treated in the embodiment is detected to be 0.12mg/L, the concentration of nickel is detected to be 0.037mg/L, the concentration of cyanogen is detected to be 0.03mg/L, and the effluent is stable.
Example 4
A method for treating electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 6.8, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 6.8: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating in a centrifuge at a rotating speed of 3800rmp for 22min to obtain a supernatant A and a precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to 6.8, then treating the supernatant A in gram-negative bacilli for 12h, and then separating the supernatant A in a centrifuge at a rotating speed of 3800rmp for 22min to obtain a supernatant B and a precipitate B;
step four: treating the supernatant B obtained in the third step for 48 hours by nitrobacteria, separating for 22min in a centrifugal machine at a rotating speed of 3800rmp to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the detection reaches the standard.
The mass concentration of the sodium dimethyldithiocarbamate aqueous solution in the first step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is 80 g/L.
The coagulant aid in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is poly-dimethyl diallyl ammonium chloride.
The flocculant in the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel is an iron-based flocculant.
The iron-based flocculant is ferric sulfate.
In the second step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the adsorbent is diatomite.
In the third step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel, the gram-negative bacillus is bacteroides fragilis.
The nitrifying bacteria in the fourth step of the method for treating the electroplating wastewater containing cyanogen, zinc and nickel are nitrosospira.
The concentration of zinc in the zinc-nickel alloy electroplating wastewater treated in the embodiment is detected to be 0.13mg/L, the concentration of nickel is detected to be 0.039mg/L, the concentration of cyanogen is detected to be 0.04mg/L, and the effluent is stable.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A method for treating electroplating wastewater containing cyanogen, zinc and nickel is characterized in that: the method for treating the electroplating wastewater containing cyanogen, zinc and nickel comprises the following steps:
the method comprises the following steps: adjusting the pH value of electroplating wastewater containing cyanogen, zinc and nickel to 5-6, adding a sodium dimethyldithiocarbamate aqueous solution for reaction to obtain a mixture A, wherein the volume ratio of the sodium dimethyldithiocarbamate aqueous solution to the electroplating wastewater containing cyanogen, zinc and nickel is 5-6: 100, respectively;
step two: sequentially adding a coagulant aid, a flocculating agent and an adsorbent into the mixture A obtained in the step one for treatment, and then separating the mixture A in a centrifuge at the rotating speed of 3000-4000rmp for 20-40min to obtain a supernatant A and a precipitate A;
step three: adjusting the pH value of the supernatant A in the step two to be 6.7-7.2, then treating the supernatant A in gram-negative bacilli for 7-16h, and then separating the supernatant A in a centrifuge at the rotating speed of 3000-;
step four: treating the supernatant B obtained in the third step for 40-80h by nitrobacteria, separating for 20-40min in a centrifuge at the rotating speed of 3000-4000rmp to obtain a supernatant C and a precipitate C, discarding the precipitate C, and discharging the supernatant C after the discharge detection reaches the standard.
2. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: the mass concentration of the sodium dimethyldithiocarbamate aqueous solution in the first step is 70-100 g/L.
3. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: and the coagulant aid in the second step is at least one of polyacrylamide and polydimethyldiallylammonium chloride.
4. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: and the flocculating agent in the second step is at least one of an iron flocculating agent and an aluminum flocculating agent.
5. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 4, wherein the method comprises the following steps: the iron-based flocculant is at least one of ferric chloride, ferric sulfate, polymeric ferric chloride and polymeric ferric sulfate.
6. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 4, wherein the method comprises the following steps: the aluminum flocculant is at least one of aluminum chloride, aluminum sulfate, polyaluminum chloride and polyaluminum sulfate.
7. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: and in the second step, the adsorbent is at least one of powdered activated carbon and diatomite.
8. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: the gram-negative bacillus in step three is one of bacteroides fragilis, bacteroides thetaiotaomicron and citrobacter rodent.
9. The method for treating cyanide-containing zinc-nickel-containing electroplating wastewater according to claim 1, which comprises the following steps: the nitrifying bacteria in the fourth step are one of nitrosospira, nitrobacteria and nitrosofola.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730649A (en) * | 2005-09-01 | 2006-02-08 | 北京未名凯拓农业生物技术有限公司 | A Pseudomonas aeruginosa strain and its culturing method and uses |
| CN105601036A (en) * | 2015-12-28 | 2016-05-25 | 北京北方节能环保有限公司 | Method for treating chemical nickel plating waste water on basis of ozonation and biochemical technique |
| CN106478288A (en) * | 2016-09-18 | 2017-03-08 | 广西大学 | A kind of soil conditioner of utilization microbial degradation Pesticide Residue in Soil |
| CN109437446A (en) * | 2018-10-19 | 2019-03-08 | 浙江海拓环境技术有限公司 | A kind of zinc nickel alloy electroplating waste water treatment process |
| CN110510768A (en) * | 2018-05-21 | 2019-11-29 | 广州超邦化工有限公司 | The combination treatment method of chemical nickle-plating wastewater |
| CN110818173A (en) * | 2018-08-10 | 2020-02-21 | 广州超邦化工有限公司 | Comprehensive treatment method of electroplating mixed wastewater |
| CN111018197A (en) * | 2020-01-07 | 2020-04-17 | 广州超邦化工有限公司 | Method for treating alkaline zinc-nickel alloy electroplating and passivation mixed wastewater |
| CN111573991A (en) * | 2020-06-03 | 2020-08-25 | 河南双辰环保工程有限公司 | Chemical plating comprehensive wastewater treatment method |
-
2020
- 2020-11-06 CN CN202011230973.6A patent/CN112358132A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730649A (en) * | 2005-09-01 | 2006-02-08 | 北京未名凯拓农业生物技术有限公司 | A Pseudomonas aeruginosa strain and its culturing method and uses |
| CN105601036A (en) * | 2015-12-28 | 2016-05-25 | 北京北方节能环保有限公司 | Method for treating chemical nickel plating waste water on basis of ozonation and biochemical technique |
| CN106478288A (en) * | 2016-09-18 | 2017-03-08 | 广西大学 | A kind of soil conditioner of utilization microbial degradation Pesticide Residue in Soil |
| CN110510768A (en) * | 2018-05-21 | 2019-11-29 | 广州超邦化工有限公司 | The combination treatment method of chemical nickle-plating wastewater |
| CN110818173A (en) * | 2018-08-10 | 2020-02-21 | 广州超邦化工有限公司 | Comprehensive treatment method of electroplating mixed wastewater |
| CN109437446A (en) * | 2018-10-19 | 2019-03-08 | 浙江海拓环境技术有限公司 | A kind of zinc nickel alloy electroplating waste water treatment process |
| CN111018197A (en) * | 2020-01-07 | 2020-04-17 | 广州超邦化工有限公司 | Method for treating alkaline zinc-nickel alloy electroplating and passivation mixed wastewater |
| CN111573991A (en) * | 2020-06-03 | 2020-08-25 | 河南双辰环保工程有限公司 | Chemical plating comprehensive wastewater treatment method |
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