CN102139973A - Method for treating micro-polluted and eutrophicated water body by utilizing coprecipitation method - Google Patents
Method for treating micro-polluted and eutrophicated water body by utilizing coprecipitation method Download PDFInfo
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- CN102139973A CN102139973A CN2011100406401A CN201110040640A CN102139973A CN 102139973 A CN102139973 A CN 102139973A CN 2011100406401 A CN2011100406401 A CN 2011100406401A CN 201110040640 A CN201110040640 A CN 201110040640A CN 102139973 A CN102139973 A CN 102139973A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000000975 co-precipitation Methods 0.000 title claims abstract description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 27
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 27
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 27
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 18
- 238000005273 aeration Methods 0.000 claims abstract description 16
- 150000002500 ions Chemical class 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 239000000839 emulsion Substances 0.000 claims abstract description 12
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims description 12
- 238000012851 eutrophication Methods 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- -1 phosphate anion Chemical class 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 8
- 241000195493 Cryptophyta Species 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011701 zinc Substances 0.000 abstract description 6
- 239000002352 surface water Substances 0.000 abstract description 5
- 239000010949 copper Substances 0.000 abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052793 cadmium Inorganic materials 0.000 abstract description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910001463 metal phosphate Inorganic materials 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 28
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 7
- 229910001424 calcium ion Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 7
- 238000000247 postprecipitation Methods 0.000 description 7
- 239000003651 drinking water Substances 0.000 description 6
- 235000020188 drinking water Nutrition 0.000 description 6
- 239000011572 manganese Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229930002868 chlorophyll a Natural products 0.000 description 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
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- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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Abstract
The invention discloses a method for treating a micro-polluted and eutrophicated water body by utilizing a coprecipitation method, belonging to the field of treatment of micro-polluted water bodies. The method comprises the following steps of: measuring the concentration of ammonia nitrogen, phosphate ions and heavy metal ions which are contained in the micro-polluted and eutrophicated water body; adding a calcium hydroxide emulsion for regulation till the pH of water is 10.0-11.0, and continuously stirring in the process; naturally precipitating to remove precipitates; and reducing the pH value of the water to be lower than 8 through artificial or natural aeration. The invention ensures that the partial organic matters, i.e. the certain heavy metal ions, the phosphate ions, algae, and the like which are contained in the water, are removed through coprecipitation action, thereby reducing the COD (Chemical Oxygen Demand) value generated by the organic matters, i.e. the algae and the like; the concentration of the heavy metal ions and phosphates which are contained in the treated water reaches the surface water environmental quality standard (GB3838-2002); and in addition, the invention has the advantages of greatly low operating cost, energy saving and good treatment effect, and is suitable for the treatment of metal micro-polluted water containing lead, cadmium, manganese, zinc, nickel, copper, and the like and eutrophicated micro-polluted water with higher phosphorus content in rivers and lakes.
Description
Technical field
The present invention relates to a kind of method that can handle heavy metal micro-polluted water and eutrophication water, say so more specifically and utilize coprecipitation method to handle the method for heavy metal micro-polluted water and eutrophication water.
Background technology
Micro-polluted source water is meant that drinking water source is polluted by the chemical thing, and some projects surpass the required standard of III class water body in " ground water environment quality standard ", and part index number is higher than the water body of drinking water sanitary standard.
The Micropollutants that cause the water source to become micro polluted source mainly include machine thing, nitrogen, smell flavor, heavy metal ion etc.In general, pollutent mainly includes machine thing, heavy metal, arsenic, prussiate etc. in the rivers water body, and pollutant kind is more, and character is complicated, though concentration is lower, still can cause very big harm to human body.
Treatment technology at mineral ion micropollutant waters such as heavy metals can be divided into the logotype of strengthening conventional processing, pre-treatment, advanced treatment, oxidation absorption and membrane process.For example, Chinese patent application (application number 99127050.9) " purifying technology for micro polluted water source " has proposed a kind of treatment process of micro-polluted water, adopt coagulative precipitation tank, Powdered Activated Carbon bio-aeration pool, ultrafiltration apparatus, nanofiltration equipment, sterilization equipment to constitute, the micro-polluted source water of this technology purifying treatment has reached the drinking water standard of national regulation.In the treatment technology of the micro-polluted water that Chinese patent application (application number 200810117791.0) " a kind of treatment process of micro-polluted source water " proposes, introduced and adopted electrocoagulation to handle the method for micro-polluted source water.In addition, also have ion exchange method, active carbon adsorption or the like.
In the treatment technology of existing micropollutant water, the removal effect of gac is better, and still, its price is higher, in use since the restriction of its loading capacity need constantly regenerate or change, thereby the normal operation and the operation of water-suppling treatment equipment are made troubles.Coagulant sedimentation has certain treatment effect to micro-polluted water, but the medicament that additionally adds can make processing cost increase, and can produce secondary pollution.In a word, there is the material cost height in these methods, and the equipment input is bigger, and running cost is higher, therefore.Be not suitable for the processing of a large amount of water bodys, and should not handle low concentration heavy metal water.
Summary of the invention
1, the technical problem that mainly solves of the present invention
Exist cost height, equipment input bigger in the treatment technology at existing micropollutant water, should not be used to handle the shortcoming of the processing etc. of low concentration heavy metal water, the invention provides a kind of method of utilizing coprecipitation method to handle little pollution and eutrophication water, can remove pollution substances such as heavy metal in the water, phosphate radical, algae, part ammonia nitrogen, remove impurity and reduce turbidity, treatment effect is good.
2, summary of the invention
Technical solution of the present invention is as follows:
A kind of method of utilizing coprecipitation method to handle little pollution and eutrophication water the steps include:
A. measure ammonia nitrogen and phosphate anion and concentration of heavy metal ion in the water body;
B. adding the pH that calcium hydroxide emulsion is adjusted to water is 10.0-11.0, constantly stirs in this process, and natural subsidence is removed precipitation;
C. by artificial or natural aeration, the pH value of water is dropped to below 8.
To handle among the step b in the water of batch processed under the throw out slurries adding that produces.
3, beneficial effect
The invention provides a kind of method of utilizing coprecipitation method to handle little pollution and eutrophication water, with respect to prior art, concrete effect is as follows:
1. the present invention has selected " carbonic acid gas " reaction that exists in the most cheap raw material " calcium hydroxide " and the water body for use, and the water body after the processing adopts artificial or natural aeration, reduces below the pH value to 8.0, has the low characteristics of cost.
When 2. the present invention handles water body, can be at the waterhead area on-the-spot disposal, simple to operate, have the advantage of in-situ treatment.
3. utilize carbon dioxide reaction in calcium hydroxide and the water body, and will last time handle the settled precipitation that contains compounds such as lime carbonate and be added to the water, accelerate settling velocity, have advantage fast again as crystal seed.
4. only use calcium hydroxide in the treating processes, have the advantage of safety and non-secondary pollution.
5. when handling heavy metal micro-polluted water such as leaded, cadmium, manganese, zinc, nickel, copper, clearance is all more than 96%, wherein can make the higher bad V class surface water of concentration of heavy metal ion such as leaded, cadmium, zinc, nickel bring up to I class water quality, the higher bad V class surface water of copper ions and phosphoric acid salt (in P) concentration is brought up to II class water quality, contain the higher water of mn ion after treatment, its concentration is well below " centralized Drinking Water surface water seedbed supplementary item criteria limit ".Processing contains the river of algae, and clearance is greater than 90%.Can effectively reduce the turbidity of river, clearance has reached drinking water sanitary standard GB5749-2006 greater than 95%.The present invention has characteristics of high efficiency.
The present invention is applicable to the pre-treatment of waterworks source water, the reparation of rivers and lakes eutrophication water, and industrial and mining enterprises contain processing up to standard of heavy metal containing sewage or the like.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 concerns between the two for calcium ion concn and water sample pH in tap water and the river.
Embodiment
As shown in Figure 1, simple with calcium hydroxide emulsion treatment scheme, treat that wherein it is crucial that calcium hydroxide emulsion is regulated the pH of sewage, control pH value terminal point well, most important to the removal pollutant in water.
PH value size when at first having determined co-precipitation: (1) gets tap water 2L, dropwise adds calcium hydroxide emulsion in water, controls the pH value of water sample from the beginning, and calcium ion concn and the pH value relation that obtains is as Fig. 2; (2) get river 2L, in water, dropwise add calcium hydroxide emulsion, the pH value of control river sample, calcium ion concn and the pH value relation that obtains equally is as Fig. 2.For the background values of the calcium ion of the calcium ion amount that makes adding and water sample is consistent substantially, can select to control pH value scope at 10.0-11.0.At this moment, because Ca (OH)
2+ CO
2→ CaCO
3↓+H
2O, so calcium ion concn can not increase along with the adding of calcium hydroxide in the water, calcium ion concn has minimizing on the contrary slightly.
After having determined optimal ph, in water, add calcium hydroxide emulsion, stir, regulator solution pH value scope is 10.0-11.0, flocks promptly generates.Continue to stir, the precipitation of new formation is fully contacted with water.Heavy metal ion in the micro-polluted water is passed through:
M
n++?nOH
-→M(OH)
n↓
This path obtains the place to go and removes.And add calcium hydroxide emulsion:
10Ca
2++2OH
-+6PO
4 3-→[Ca
10(OH)
2(PO
4)
6]?↓
Also reduced the concentration of P in the eutrophic water.Along with increasing gradually of lime carbonate, negatively charged ion in the water and positively charged ion are by titanium pillaring solution, and flocculation and ion complexation are removed pollutent, purifying slightly polluted water.
Leave standstill after stopping to stir, make clear liquid and precipitated and separated.Clear liquid is by artificial or natural aeration, and the pH value descends.
At last, the precipitation that processing is obtained is as crystal seed, and premix is incorporated into down in the water of batch processed, when adding calcium hydroxide regeneration CaCO
3During precipitation, sedimentary settling velocity in the water can be quickened, the clearance of some pollution substances can be improved to a certain extent.Adding calcium hydroxide emulsion when pH is 10.0-11.0, the metal ion in the precipitation originally can not enter in the water again, can not cause secondary pollution.
The present invention adds calcium hydroxide emulsion and makes precipitation agent, also strengthens the effect of the alkalescence of micro-polluted water simultaneously with calcium hydroxide emulsion, makes pH=10.0-11.0, promptly produces CaCO
3Precipitation.CaCO
3Precipitation has certain adsorption, can adsorb heavy metal ion in the waste water and other impurity, can make more macromolecular organic impurity, algae etc. in the water by lime carbonate and not molten calcium hydroxide absorption and remove.The pH of water is 10.0-11.0 after the sedimentation, and behind the aeration by for some time, the pH value descends, to not injury of biology.
Be specific embodiments of the invention below
Embodiment 1
1. waste water contains Pb before handling
2+Concentration is 0.062575mg/L;
2. in waste water, add the post precipitation that produces in the last time experiment, the pH value is adjusted to 10.0 with calcium hydroxide, in settling bath, stirred 5 minutes;
3. will on go on foot waste water drop to about 8 until pH through artificial or natural aeration;
Record water quality: Pb after the processing
2+=0.002238 mg/L; PH=8.0.After this invention was handled, contained lead ion only can reach the water of V class in the water environment quality standard can bring up to the I class, and clearance reaches 96.4%.
Embodiment 2
1. waste water contains Cd before handling
2+Concentration 0.828329mg/L;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 10.8, stirring is 5 minutes in settling bath;
3. the waste water that will go up the step gained drops to about 8 until pH through artificial or natural aeration.
Record water quality: Cd after the processing
2+=0.00144mg/L; PH=8.01.After this invention was handled, contained cadmium ion only can reach the water quality of bad V class in the water environment quality standard can bring up to I class water, and clearance reaches 99.8%.
Embodiment 3
1. waste water contains Mn before handling
2+Concentration 4.62457mg/L;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 10.8, stirring is 5 minutes in settling bath;
3. the waste water that will go up the step gained drops to about 8 until pH through artificial or natural aeration.
Record water quality: Mn after the processing
2+=0.028721mg/L; PH=7.9.Centralized Drinking Water surface water seedbed supplementary item criteria limit Mn
2+Be 0.1mg/L, this moment, the Mn ionic concn obviously reached requirement, and clearance reaches 99.4%.
Embodiment 4
1. waste water contains Zn before handling
2+Concentration 4.64768mg/L;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 10.5, stirring is 5 minutes in settling bath;
3. the waste water that will go up the step gained drops to about 8 until pH through artificial or natural aeration.
Record water quality: Zn after the processing
2+=0.012336mg/L; PH=7.86.The water quality that this invention only can reach bad V class in the water environment quality standard with contained cadmium ion is carried and be can be up to I class water, Zn
2+Clearance reached 99.7%.
Embodiment 5
1. waste water contains Ni before handling
2+Concentration 1.03372mg/L;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 10.2, stirring is 5 minutes in settling bath;
3. the waste water that will go up the step gained drops to about 8 until pH through artificial or natural aeration.
Record water quality: Ni after the processing
2+=0.012336mg/L; PH=7.75.Well below the highest permission emission concentration of first kind pollutent is 1.0mg/L, and clearance is 98.8%
Embodiment 6
1. waste water contains Cu before handling
2+Concentration 2.30228mg/L;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 10.9, stirring is 5 minutes in settling bath;
3. will go up the artificial or natural aeration of the waste water of step gained drops to about 8 until pH.
Record water quality: Cu after the processing
2+=0.084905mg/L; PH=8.07.Clearance reaches 96.3%, and the water quality that this moment, the institute copper ions only can reach bad V class in the water environment quality standard is carried and be can be up to II class water.
Embodiment 7
1. the phosphate concn (in P) of waste water is 10.8mg/L before handling;
2. add the post precipitation that produces in the last time experiment in waste water, the pH value of waste water is adjusted to calcium hydroxide approximates 11.0, stirring is 5 minutes in settling bath;
3. will go up the artificial or natural aeration of the waste water of step gained drops to about 8 until pH.
Record water quality after the processing: phosphate concn is: 0.379 mg/L; PH=7.66.After this invention is handled, phosphoric acid salt only can be reached sewage comprehensive discharge grade III Standard index bring up to first class index, clearance reaches 96.5%.
Embodiment 8
1. handle the water that the nine townshiies river July is imitated in east, Nanjing, former algae class density nearly 10
8Individual/L, chlorophyll a is 80.1 μ g/L;
2. the pH value of river is adjusted to calcium hydroxide and approximates 10.5, stirs 15 minutes in settling bath;
3. the upper strata clear water artificial aeration who goes up the step gained drops to 7.8 until pH.
Record water quality after the processing: algae density reduces to 5.06 * 10
6Individual/L, chlorophyll a is 7.4 μ g/L, and clearance reaches 95% and 91% respectively.
Embodiment 9
1. handle the water that the nine townshiies river July is imitated in east, Nanjing, raw water turbidity is 23.1NTU before handling;
2. be adjusted to calcium hydroxide and approximate 10.3, in settling bath, stirred 25 minutes;
3. remove precipitation, the artificial aeration drops to 8 until pH.
Record water quality after the processing: turbidity is 0.88NTU, and clearance reaches 96.2%, has reached drinking water sanitary standard GB5749-2006.
Claims (2)
1. a method of utilizing coprecipitation method to handle little pollution and eutrophication water the steps include:
A. measure ammonia nitrogen and phosphate anion and concentration of heavy metal ion in the water body;
B. adding the pH that calcium hydroxide emulsion is adjusted to water is 10.0-11.0, constantly stirs in this process, and natural subsidence is removed precipitation;
C. by artificial or natural aeration, the pH value of water is dropped to below 8.
2. the method for utilizing coprecipitation method to handle little pollution and eutrophic water according to claim 1 is characterized in that and will handle among the step b in the water of batch processed under the throw out slurries adding that produces.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112939A (en) * | 2013-02-26 | 2013-05-22 | 天津理工大学 | Method for removing trace copper in aqueous solution |
| CN103145263A (en) * | 2013-02-26 | 2013-06-12 | 天津理工大学 | Method for removing trace manganese in aqueous solution |
| CN104140159A (en) * | 2014-07-18 | 2014-11-12 | 常州大学 | Synthesis of biological agent for gathering nitrate in micro-polluted water body |
| CN105540808A (en) * | 2016-01-18 | 2016-05-04 | 北京绿景行科技发展有限公司 | Phosphorous removal and alga control method for medium eutrophication water body |
| CN110918113A (en) * | 2019-10-16 | 2020-03-27 | 西南交通大学 | Method for preparing cobalt-nickel-ammonium phosphate catalyst by using ammonia nitrogen wastewater and simulation experiment method |
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2011
- 2011-02-18 CN CN2011100406401A patent/CN102139973A/en active Pending
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| CN103112939A (en) * | 2013-02-26 | 2013-05-22 | 天津理工大学 | Method for removing trace copper in aqueous solution |
| CN103145263A (en) * | 2013-02-26 | 2013-06-12 | 天津理工大学 | Method for removing trace manganese in aqueous solution |
| CN103145263B (en) * | 2013-02-26 | 2014-06-25 | 天津理工大学 | Method for removing trace manganese in aqueous solution |
| CN104140159A (en) * | 2014-07-18 | 2014-11-12 | 常州大学 | Synthesis of biological agent for gathering nitrate in micro-polluted water body |
| CN104140159B (en) * | 2014-07-18 | 2015-10-21 | 常州大学 | The biotechnological formulation synthetic method of nitrate content in a kind of enrichment micropollutant water |
| CN105540808A (en) * | 2016-01-18 | 2016-05-04 | 北京绿景行科技发展有限公司 | Phosphorous removal and alga control method for medium eutrophication water body |
| CN105540808B (en) * | 2016-01-18 | 2018-12-18 | 北京绿景行科技发展有限公司 | A kind of method of medium eutrophic water body dephosphorization control algae |
| CN110918113A (en) * | 2019-10-16 | 2020-03-27 | 西南交通大学 | Method for preparing cobalt-nickel-ammonium phosphate catalyst by using ammonia nitrogen wastewater and simulation experiment method |
| CN110918113B (en) * | 2019-10-16 | 2021-03-30 | 西南交通大学 | Method for preparing cobalt-nickel-ammonium phosphate catalyst by using ammonia nitrogen wastewater and simulation experiment method |
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