CN1792861B - Process for treating waste water of artificial diamond - Google Patents
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- CN1792861B CN1792861B CN 200510101492 CN200510101492A CN1792861B CN 1792861 B CN1792861 B CN 1792861B CN 200510101492 CN200510101492 CN 200510101492 CN 200510101492 A CN200510101492 A CN 200510101492A CN 1792861 B CN1792861 B CN 1792861B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 30
- 239000010432 diamond Substances 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 17
- 239000002351 wastewater Substances 0.000 title claims description 81
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 239000000706 filtrate Substances 0.000 claims description 22
- 238000004065 wastewater treatment Methods 0.000 claims description 21
- 238000001556 precipitation Methods 0.000 claims description 16
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 229910021645 metal ion Inorganic materials 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims 2
- 230000003647 oxidation Effects 0.000 claims 2
- 238000007254 oxidation reaction Methods 0.000 claims 2
- 230000003472 neutralizing effect Effects 0.000 abstract description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 38
- 239000011734 sodium Substances 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 235000012976 tarts Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RBORURQQJIQWBS-QVRNUERCSA-N (4ar,6r,7r,7as)-6-(6-amino-8-bromopurin-9-yl)-2-hydroxy-2-sulfanylidene-4a,6,7,7a-tetrahydro-4h-furo[3,2-d][1,3,2]dioxaphosphinin-7-ol Chemical compound C([C@H]1O2)OP(O)(=S)O[C@H]1[C@@H](O)[C@@H]2N1C(N=CN=C2N)=C2N=C1Br RBORURQQJIQWBS-QVRNUERCSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A process for treating the sewage generated by preparing artificial diamond features that the cheap CaCO3 powder is used for neutralizing, the Na2S is used for recovering Ni, and the H2O2 is used for oxidizing to recover Fe.
Description
Technical field
The present invention relates to a kind of process for treating waste water of artificial diamond, more particularly, the present invention relates to a kind of process for treating waste water of artificial diamond that can fully reclaim the useful metal element in the waste water.
Background technology
Along with the develop rapidly of superhard material, the consumption of man-made diamond is increasing, and consequent artificial diamond industrial's waste water is also more and more.If directly Synthetic Diamond Wastewater is entered nature, not only will cause very and seriously influence environment, and the metallic element of the valuable recyclable utilization of some that contain in the Synthetic Diamond Wastewater (such as Ni, Fe) also will run off, and will cause the waste of resource.
Traditional Synthetic Diamond Wastewater treatment process mainly is to adopt following step to carry out: at first the waste water (the general pH value is less than 0.5) to strong acid environment adds highly basic (being generally NaOH) neutralization, the pH value is transferred to about 8-9, add pAM (polyacrylamide) flocculation simultaneously.Then waste water being carried out press filtration handles, waste water is divided into filtrate and filter residue two portions, and wherein filtrate meets national wastewater discharge standard, can directly discharge, and contain the oxyhydroxide or the oxide compound of metallic elements such as Ni, Fe, Mn, Ca in the filter residue, as Ni (OH)
2, Fe (OH)
2, Fe (OH)
3, Mn (OH)
2, Fe
2O
3Deng.But the price of this traditional needed highly basic NaOH of method of wastewater treatment is relatively expensive, is unsuitable for being widely used in wastewater treatment.Its another major defect is that this traditional method only is that the metallic element that is difficult for to the nature discharging is separated from waste water, metallic element mixed in together in the filter residue does not have utility value basically, thereby has wasted the resource of these recyclable utilizations.
Another kind of Synthetic Diamond Wastewater treatment process mainly comprises the steps: at first the waste water (the general pH value is less than 0.5) of strong acid environment is added H
2O
2With Fe wherein
2+Be oxidized to Fe
3+, simultaneously the pH value is transferred to about 4-6.Then waste water is carried out press filtration and handle, waste water is divided into filtrate and filter residue two portions, wherein filter residue is the Fe (OH) that contains impurity
3Throw out, and filtrate is further added Na
2CO
3Neutralization transfers to filtrate pH value about 8-9, and NiCO will appear in this moment
3Throw out carries out press filtration once more and handles, and the filtrate that obtain this moment just meets national wastewater discharge standard, can directly discharge to nature.But this method has just reclaimed to have utilizes the NiCO that is worth
3, and for Fe (OH)
3Then can't directly recycle, because Fe (OH)
3In contain some Ni (OH)
2, Mn (OH)
2Deng impurity.
Chinese patent application 03157655 discloses a kind of electroplating wastewater improvement method.It comprises on the technology liquid material processing, lifting, supercharging and transports routine, has wherein adopted the hierarchical composition of membrane separation technique: pre-treatment, finish the removing of impurity, organism and fine suspension; Remove sodium ion in the one-level nanofiltration membrane separation, make waste water concentrate 10 times and permitted, the rejection of heavy metal ion is greater than 97; Waste water concentrated solution reconcentration is permitted for 5 times, and it is higher than 98% to the divalent ion rejection; During three grades of seawater reverse osmosis membranes separate waste water is concentrated more than 2 times or 2 times, the rejection of mineral ion is higher than 99.5%; Adopted the pH value of regulating rinse water to prevent that the oxyhydroxide in the waste water from producing precipitation and regular chemistry, the physical step of flushing automatically, realized seeing through the liquid reuse, the direct reuse of final stage concentrated solution has been realized pretreated zero release regulation effect.But this method adopts is three grades reverse osmosis membrane filtration, and cost is too expensive, is not suitable for a large amount of industrialized wastewater treatments, and this method is also with metallic element grading extraction and directly recycling.
Therefore, the process for treating waste water of artificial diamond that a kind of efficient and cheap is provided and can fully recycles the useful metal element in the waste water becomes the problem that industry need solve.
Summary of the invention
The process for treating waste water of artificial diamond that the purpose of this invention is to provide a kind of low-cost high production.
Technical scheme of the present invention is achieved in that a kind of process for treating waste water of artificial diamond, contains Ni in order to processing
2+, Fe
2+Deng the tart Synthetic Diamond Wastewater of metal ion, it may further comprise the steps: the first step adds CaCO in waste water
3Carry out neutralizing treatment, the pH value is transferred between 1.3～2.0; In second step, the waste water after the neutralizing treatment is carried out press filtration handle; In the 3rd step, add Na in the filtrate that after second step handled, obtains
2S solution transfers to the pH value between 2.5～4.0; In the 4th step, the waste water after the processing of the 3rd step is carried out press filtration handle; In the 5th step, the solution that obtains after the 4th step handled adds oxygenant and carries out oxide treatment; In the 6th step, the solution that obtains after the 5th step handled adds alkali and (preferably adds NaOH or Na
2CO
3), the pH value is transferred between 4.0～6.5; The 7th step, the waste water after the processing of the 6th step is carried out press filtration handle, obtain Fe (OH)
3Precipitation.
The CaCO that is adopted in the first step
3Can be various forms of CaCO
3, but the preferred CaCO that adopts by cheapness
3Ore is directly pulverized the CaCO that obtains
3Powder; PH value after the neutralizing treatment is for being preferably 1.3～1.7, and preferably, preferred pH value is 1.5.
After press filtration in second step was handled, the filter residue that obtains was mainly the CaSO of indissoluble
4And excessive unreacted CaCO
3Precipitation.
The 3rd step added Na
2Behind the S solution pH value is transferred to 3.3～3.7, Na
2The concentration of S solution is 10%～15%, generates the NiS precipitation, and solution is for slowly adding not separate out H
2S is advisable.Preferably, the 3rd step added Na
2Behind the S solution pH value is transferred to about 3.5.
Filter residue drying after the 4th step press filtration is handled obtains the NiS filter cake that can directly recycle.
The H in the 5th step
2O
2In order to Fe
2+Be oxidized to Fe
3+, the oxide compound that in like manner also can adopt other is with Fe
2+Be oxidized to Fe
3+
Also have the process of an intensification between the 5th step and the 6th step, temperature is elevated to the temperature of being convenient to take place chemical reaction, preferably temperature is risen to about 60～80 degrees centigrade.
NaOH or Na that the 6th step added
2CO
3Can be its solid, as its particle or powder, also its solution; After the adding pH value is transferred between 5.0～6.0, preferably the pH value is transferred to 5.0.
Can also comprise a long insulating process, preferably 2～3 hours between the 6th step and the 7th step.
The filter residue that obtains after the 7th step press filtration is handled is purified Fe (OH)
3Precipitation becomes Fe through behind the drying and calcining
2O
3Directly as the iron oxide red in pigment or the paint.
Further comprised for one the 8th step, add Ca (OH) in the filtrate after the 7th step handled
2With polyacrylamide, the pH value is transferred between 7.5～10, preferably between 8.0～9.0, be the 9th step then, the waste water press filtration is handled, removing other ions such as Mn that contain in the Synthetic Diamond Wastewater, and to make the filtrate that obtains be the waste water of allow compliance with emission standards again.
The Synthetic Diamond Wastewater that the present invention handles generally presents the strongly-acid border, and pH can reach about 0.5.
Method of the present invention can be applied to the processing of inartificial diamond waste water, just can adopt method of the present invention to handle as long as contain metal ions such as Ni, Fe, Mn in the waste water.
If contain a spot of Fe in the Synthetic Diamond Wastewater
3+, technical scheme then of the present invention can may further comprise the steps: the first step adds CaCO in waste water
3, the pH value is transferred between 3.5～4.0; In second step, the waste water after the first step processing is carried out press filtration handle, to remove CaSO
4, unreacted CaCO
3And Fe (OH)
3Precipitation; In one of the 3rd step, add not processed Synthetic Diamond Wastewater in the filtrate that after second step handled, obtains waste water ph is transferred between 1.3～2.0; In two of the 3rd step, add Na in the waste water after one of the 3rd step handles
2S solution transfers to the pH value between 2.5～4.0; In the 4th step, the waste water after two processing in the 3rd step is carried out press filtration handle; In the 5th step, the solution that obtains after the 4th step handled adds H
2O
2In the 6th step, the solution that obtains after the 5th step handled adds NaOH or Na
2CO
3, the pH value is transferred between 4.0～6.5; In the 7th step, the waste water after the processing of the 6th step is carried out press filtration handle; In the 8th step, add Ca (OH) in the filtrate after the 7th step handled
2With polyacrylamide, the pH value is transferred between 8.0～9.0, and then its press filtration is handled, to remove other ions such as Mn that contain in the Synthetic Diamond Wastewater, the filtrate that obtains is the waste water of allow compliance with emission standards.
Disclosed above-mentioned pH value regulation range all is to decide at concrete Synthetic Diamond Wastewater.But the pH value regulation range of process for treating waste water of artificial diamond of the present invention is can be according to the variation of waste water intermediate ion concentration and corresponding change.
The invention has the beneficial effects as follows: use cheap CaCO
3Come the neutralizing acid wastewater, can save processing cost; Adopt orderly treatment process, the gradable metal product that can directly recycle of obtaining had both helped the recycling of resource, had reduced the pollution to environment again.
Below in conjunction with embodiment, further specify the present invention, but the present invention is not limited to these embodiment, any on essence spirit of the present invention improvement or substitute, still belong to scope required for protection in claims of the present invention.
Embodiment
Embodiment 1
Process for treating waste water of artificial diamond of the present invention contains the Synthetic Diamond Wastewater of the strong acidic environment of metal ions such as Ni, Fe, Mn in order to processing, it may further comprise the steps:
The first step adds cheap CaCO in waste water
3Powder transfers to 1.5 with the pH value.CaCO
3The cost of powder is about 80 yuan/ton, and therefore about 2800 yuan/ton of the price of NaOH, uses CaCO
3Carry out acid-base neutralisation, can reduce the cost of processing greatly.
Second step, the waste water after the first step processing is carried out press filtration handle, the filter residue that obtains is mainly CaSO
4And unreacted CaCO
3Precipitation.
In the 3rd step, the clear liquid of press filtration is slowly added concentration under stirring state be 10～15% sodium sulfide solution, and adding speed is not to emit H
2S is advisable, and transferring to the pH value is 3.5, and this moment can be with Ni
2+Be completed into nickel sulphide precipitation.If small amount of Fe is arranged
3+, the sodium reduction that then cures becomes Fe
2+, because Fe
2+Concentration low, the sodium that do not cure precipitates.Under this pH situation, can there be S in the solution
2-Sulfide precipitation and pH value corresponding relation are as shown in the table:
In the 4th step, the waste water after the 3rd step handled carries out press filtration to be handled, and the filter residue drying after press filtration is handled obtains the more purified NiS filter cake that can sell.
In the 5th step, slowly the solution that obtains after the 4th step handled adds H
2O
2, in order to Fe
2+Be oxidized to Fe
3+
The 6th step, heat up 70～80 ℃ then, add 10～15% NaOH or Na
2CO
3Solution, adjust pH to 5～6 make it to generate Fe (OH)
3, be incubated 1～3 hour again.
The 7th step, the waste water after the processing of the 6th step is carried out press filtration handle, the filter residue that press filtration obtains after handling is purified Fe (OH)
3Precipitation becomes Fe through behind the drying and calcining
2O
3Can be directly as the iron oxide red in pigment or the paint.
In the 8th step, add Ca (OH) in the filtrate after the 7th step handled
2With PAM (polyacrylamide), the pH value is transferred between 8.0～9.0, to remove other ions such as Mn that contain in the Synthetic Diamond Wastewater.PAM plays throwing out so that form precipitation.
The 9th step, again the waste water press filtration to be handled, the filtrate that obtains is the waste water of allow compliance with emission standards.
Embodiment 2
As another embodiment of the invention, contain Ni, Fe in order to processing
2+, Fe
3+Deng the tart Synthetic Diamond Wastewater of metal ion, it may further comprise the steps:
The first step adds CaCO in waste water
3, the pH value is transferred between 2.5～4.0 preferably 3.5.Because small amount of Fe is arranged in the waste water
3+, can use CaCO earlier
3Regulate pH value to 3.5, with Fe
3+Form purified Fe (OH)
3Precipitation.Can be with this part Fe (OH)
3Extract earlier.Precipitation of hydroxide and pH value corresponding relation are as shown in the table:
Second step, the waste water after the first step processing is carried out press filtration handle, get pure Fe (OH)
3Precipitation.
One of the 3rd step adds not processed Synthetic Diamond Wastewater (being former water) in the filtrate that obtains after second step handled, its pH value is transferred between 1.3～1.7, is preferably 1.5.
In two of the 3rd step, add Na in the waste water after one of the 3rd step handles
2S solution transfers to the pH value between 3.3～3.7.Following step is identical with embodiment 1.
Embodiment 3
As an embodiment more of the present invention, on the basis of embodiment 1, change following index, and other guide is constant:
The first step adds CaCO in waste water
3, the pH value is transferred to 1.3.
In the 3rd step, the clear liquid of press filtration is added concentration under stirring state be 15～25% sodium sulfide solution, and transferring to the pH value is 3.3.
The 6th step, heat up 50～70 ℃ then, add 15～25% NaOH or Na
2CO
3Solution, adjust pH to 4.0～6.5 make it to generate Fe (OH)
3, be incubated 3～5 hours again.
Waste water for containing other impurity such as a small amount of Mn can cancel step of the 8th among the embodiment one and the 9th step, and the filtrate discharge after directly the 7th step press filtration being handled also is to meet discharging standards substantially to nature.
Claims (16)
1. process for treating waste water of artificial diamond, this waste water are acid and contain metal ion, and it may further comprise the steps:
(1) in waste water, adds CaCO
3Its acidity that neutralizes transfers to its pH value between 1.3～2.0;
(2) with above-mentioned through CaCO
3Waste water after the processing carries out press filtration to be handled;
(3) in the resulting filtrate of step (2), add Na
2S solution transfers to its pH value between 2.5～4.0, and carries out press filtration and handle;
(4) the resulting filtrate of step (3) is carried out oxidation, and add alkali its pH value is transferred between 4.0～6.5, and then carry out the press filtration processing.
2. method of wastewater treatment as claimed in claim 1 is characterized in that, added CaCO in the step (1)
3Be CaCO
3Powder, the pH value of described waste water transfers between 1.3～1.7.
3. method of wastewater treatment as claimed in claim 2 is characterized in that, the pH value of waste water transfers to 1.5 described in the step (1).
4. method of wastewater treatment as claimed in claim 1 is characterized in that, the pH value is transferred between 3.3～3.7 in the step (3).
5. method of wastewater treatment as claimed in claim 4 is characterized in that, the pH value is transferred to 3.5 by the pH value in the step (3).
6. method of wastewater treatment as claimed in claim 1 is characterized in that, the oxygenant of oxide treatment is H in the step (4)
2O
2
7. method of wastewater treatment as claimed in claim 1 is characterized in that, the alkali that is added in the step (4) is NaOH or Na
2CO
3, and the pH value transferred between 5.0～6.0.
8. process for treating waste water of artificial diamond, this waste water are acid and contain metal ion, and it may further comprise the steps:
(1) in waste water, adds CaCO
3Powder its acidity that neutralizes transfers to its pH value between 3.5～4.0;
(2) with above-mentioned through CaCO
3Waste water after the processing carries out press filtration to be handled, and adds not processed waste water then in resulting filtrate, and its pH value is transferred between 1.3～2.0;
(3) in the resulting liquid of step (2), add Na
2S solution transfers to its pH value between 2.5～4.0, and carries out press filtration and handle;
(4) the resulting filtrate of step (3) is carried out oxidation, and add alkali its pH value is transferred between 4.0～6.5, and then carry out the press filtration processing.
9. method of wastewater treatment as claimed in claim 8 is characterized in that, step transfers to the pH value between 1.3～1.7 in (2).
10. method of wastewater treatment as claimed in claim 9 is characterized in that, step transfers to 1.5 with the pH value in (2).
11., it is characterized in that described method of wastewater treatment further comprises in the resulting filtrate of step (4) and adds Ca (OH) as the described method of wastewater treatment of one of claim 1-7
2With the step of polyacrylamide, and the pH value transferred between 8.0～9.0, to remove other impurity such as Mn ion that contain in the described waste water.
12. method of wastewater treatment as claimed in claim 11 is characterized in that, during the oxide treatment of step (4) temperature is risen to 60～80 ℃ and be incubated.
13. method of wastewater treatment as claimed in claim 12 is characterized in that, the Fe (OH) that obtains is handled in step (4) press filtration
3Make Fe after the calcining of precipitation drying
2O
3
14., it is characterized in that described method of wastewater treatment further comprises in the resulting filtrate of step (4) and adds Ca (OH) as the described method of wastewater treatment of one of claim 8-10
2With the step of polyacrylamide, and the pH value transferred between 8.0～9.0, to remove other impurity such as Mn ion that contain in the described waste water.
15. method of wastewater treatment as claimed in claim 14 is characterized in that, during the oxide treatment of step (4) temperature is risen to 60～80 ℃ and be incubated.
16. method of wastewater treatment as claimed in claim 15 is characterized in that, the Fe (OH) that obtains is handled in step (4) press filtration
3Make Fe after the calcining of precipitation drying
2O
3
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466552A (en) * | 2000-08-21 | 2004-01-07 | Csir | water treatment method |
| CN1475589A (en) * | 2002-08-15 | 2004-02-18 | 北京有色金属研究总院 | Acid balance method in biometallugical process |
-
2005
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466552A (en) * | 2000-08-21 | 2004-01-07 | Csir | water treatment method |
| CN1475589A (en) * | 2002-08-15 | 2004-02-18 | 北京有色金属研究总院 | Acid balance method in biometallugical process |
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