CN105693003B - The processing method of cadmium in a kind of removal electroplating wastewater - Google Patents
The processing method of cadmium in a kind of removal electroplating wastewater Download PDFInfo
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- CN105693003B CN105693003B CN201610267551.3A CN201610267551A CN105693003B CN 105693003 B CN105693003 B CN 105693003B CN 201610267551 A CN201610267551 A CN 201610267551A CN 105693003 B CN105693003 B CN 105693003B
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- tea seed
- seed cake
- cadmium
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- 239000002351 wastewater Substances 0.000 title claims abstract description 70
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 47
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000009713 electroplating Methods 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 241001122767 Theaceae Species 0.000 claims abstract description 61
- 238000005273 aeration Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000004062 sedimentation Methods 0.000 claims abstract description 36
- 238000005188 flotation Methods 0.000 claims abstract description 29
- 238000005202 decontamination Methods 0.000 claims abstract description 25
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 24
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 229930182490 saponin Natural products 0.000 claims abstract description 14
- 150000007949 saponins Chemical class 0.000 claims abstract description 14
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 35
- 239000002699 waste material Substances 0.000 claims description 32
- 238000001556 precipitation Methods 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 235000017709 saponins Nutrition 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000089742 Citrus aurantifolia Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000245654 Gladiolus Species 0.000 description 1
- 241000489433 Isoetes lacustris Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000003113 alkalizing effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000081 body of the sternum Anatomy 0.000 description 1
- HUKFCVYEXPZJJZ-UHFFFAOYSA-N cadmium;hydrate Chemical compound O.[Cd] HUKFCVYEXPZJJZ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008085 renal dysfunction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- 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)
- Physical Water Treatments (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a kind of processing method of cadmium in removal electroplating wastewater, waste water is handled by sump, coarse rack, primary sedimentation basin, pH value regulating reservoir, tea seed cake aeration flotation decontamination systems, heating concentration basin, alkalization sedimentation basin, pH value Secondary Control pond, secondary sedimentation tank, water purifying tank successively.The cadmium ion flotation characteristic that the Tea Saponin being utilized contained in tea seed cake of the invention has, under conditions of pH value is 5.5 ~ 6.5, Tea Saponin in tea seed cake, which can be combined and be formed with the cadmium ion in waste water, is easy to pneumatically supported molecular structure, a large amount of bubbles are passed through into water by way of compressed air aeration again, bubble, which can be carried secretly, has combined the Tea Saponin of cadmium ion to float up to the water surface together, and converge and form foam, to targetedly remove the cadmium ion in waste water.Meanwhile residue of the tea seed cake sheet as tea seed after oil expression, it is of low cost, it is easy to obtain, the Material Cost of wastewater treatment can be substantially reduced.
Description
Technical field
The present invention relates to a kind of processing methods of cadmium in removal electroplating wastewater, belong to the wastewater treatment neck in environmental protection
Domain.
Background technology
Heavy metal pollution of water body becomes one of the environmental problem of world today's common concern.Cadmium is pole in industry plating wastewater
For common heavy metal ion.It is enriched with by food chain, high risks is brought to animals and humans.It is happened at Japan folic hill
" Itai-itai diseases " event is exactly that cadmium wastewater is discharged into water body by local aluminium manufacturer, and resident is eaten for a long time rice containing cadmium, drinks water containing cadmium, body
Interior Cd accumulation is excessive, and the calcium in renal dysfunction, sclerotin is caused to be replaced by cadmium, make skeleton softening, fracture and caused by.Cadmium also has
Carcinogenic, teratogenesis shape, mutagenic toxic action.
The existing removal technology to cadmium in water environment mainly has three categories：When physical chemistry recovery technique, second is that plant
Recovery technique, three are bioremediation technologies.
1, physical chemistry recovery technique
Physical chemistry recovery technique contains many specific processing methods, such as precipitation, solvent extraction, ion exchange, film
Separation, absorption, neutralisation, oxidization by bleaching powder method, iron oxidation-precipitation method and metal deoxidization, electrolysis etc..
（1）Neutralization precipitation method：Under alkaline condition, cadmium generate indissoluble, stabilization sediment.Soda lime (CaO), calcium hydroxide
[Ca(OH)2], flying dust (pulverized limestone, CaO), the limes neutralizer such as dolomite (CaO＆MgO) it is cheap, can remove in waste water
Cadmium ion, and it is simple for process.But this method sediment weight is big, goes out water hardness height.
（2）Sulphide precipitation：Vulcanizing agent is added in waste water, cadmium ion is just in that sulfide precipitation is precipitated, commonly
Vulcanizing agent has Na2S、NaHS、H2S etc..The sediment moisture content that vulcanization generates is low, and is not easy to return molten formation secondary precipitation.But vulcanize
Agent price is high, and H is also easy to produce in acid waste water2S and the environment for polluting surrounding, processing cost in this way it is higher, be also easy to produce
Secondary pollution is industrially difficult to extensive use.
（3）Absorption method：Absorption method is to utilize porous solid matter, and one or more substances in water is made to be attracted to
The surface of solids and the method removed.Absorption method processing is more containing the influence factor every waste water, such as the granularity of adsorbent, adsorbent
Additive amount, the ingredient of waste water, waste water containing cadmium concentration, pH value, adsorption time etc., these can all increase the difficulty of practical operation.
（4）Oxidization by bleaching powder method：This method is only applicable to the waste water containing cyanogen, cadmium in processing Qing Fa cadmium plating factory, this waste water
Main component be [Cd (CN)4]2-、Cd2+And CN-.Key reaction process in wastewater treatment is：Bleaching powder hydrolyzes generation first
Cd(OH)2And HOC, OH-With Cd2+Generate Cd (OH)2Precipitation, the HOC that bleaching powder hydrolysis generates has strong oxidizing property, by CN-Oxidation
Generate CO3 2-And N2, promote [Cd (CN) 4]2-Dissociation, last CO3 2-With Ca2+CaCO is generated under alkaline condition3Precipitation, but this
Method narrow scope of application.
（5）Iron oxidizing process：Ferrous sulfate is added into cadmium wastewater, pH to 9 ~ 10 is adjusted using sodium hydroxide, heating is simultaneously
It is passed through compressed air to be aoxidized, you can form ferrite crystal and the metal ions such as cadmium is made to enter in ferrite lattice, filter
It can isolate containing Cd ferrite.The method using face is relatively narrow, the problem of being brought there are many more technical combinations.
（6）Electrolysis：Electrolysis refers to making heavy metal in waste water isolation electrolysis using the basic principle of electrolysis, cloudy in sun-
Oxidation and reduction reaction occurs on the two poles of the earth respectively makes its enrichment, is then handled.The method cadmium removal rate is high, but cost also compares
It is higher.
2, phytoremediation technology
Phytoremediation technology is the patience to cadmium pollution water body using water plants such as gladiolus, Taiwan quillwort, sharp leaf imperial crowns,
Water body is repaired, the cadmium in water body can be removed to some extent, but selectable tolerant plant type and quantity are few.
3, biological reinforcing technology
Traditional bioremediation technology is to handle waste water using the metabolism of biology.In traditional biological treatment
The microorganism with specific function or certain matrix are added in system, enhances its degradation capability to specific pollutants, to change
It is apt to the treatment effect of entire sewage disposal system, this technology is referred to as biological reinforcing technology.The shortcomings that the method is immobilization
Carrier is of high cost, service life is short.
Currently, existing electroplating effluent treatment method containing cadmium exists, slow reaction, narrow application range, control condition be more, cost
It is high and the deficiencies of easily cause secondary pollution.Therefore, it is necessary to break away from existing treatment technology thinking, processing electroplating wastewater is hewed out
In have the new way of cadmium, and then develop a kind of electroplating wastewater Cadmium treated technology of new type.
Invention content
To solve the deficiencies in the prior art, the present invention provides a kind of processing sides of cadmium in removal electroplating wastewater
Method, the electroplating wastewater containing cadmium enter sump by waste line, carry out centralized collection herein and preliminarily stabilised is adjusted, sump
Outlet by waste line connect coarse rack, at this remove waste water in major diameter solid matter, the outlet of coarse rack passes through
Waste line connects primary sedimentation basin, and in this insoluble matter in further removing waste water, the outlet of primary sedimentation basin, which passes through, gives up
Water pipeline connects pH value regulating reservoir, and waste water carries out the accurate adjusting of pH value herein, and the pH value range of pH value regulating reservoir water outlet is 5.5
~ 6.5, the water pH value that enters to meet tea seed cake-aeration flotation decontamination systems requires, and the outlet of pH value regulating reservoir is connected by waste line
Tea seed cake-aeration flotation decontamination systems are connect, foam row's mouth of tea seed cake-aeration flotation decontamination systems is dense by waste line connection heating
Contracting pond, passes through low-temperature heat herein（50~60℃）Foam is set to concentrate, the outlet for heating concentration basin is connected by waste line
Alkalize sedimentation basin, and waste water carries out basification, is allowed to complete the precipitation process of cadmium under alkaline condition herein, forms sludge containing cadmium
And recycle, meanwhile, alkalization sedimentation basin connects pH by waste line respectively with the outlet of tea seed cake-aeration flotation decontamination systems
It is worth Secondary Control pond, tea seed cake-aeration flotation decontamination systems will be passed through herein treated waste water and by alkalization sedimentation basin processing
The pH value of waste water afterwards is adjusted to close to neutrality, and the outlet in pH value Secondary Control pond connects secondary sedimentation tank by waste line,
Other insoluble matters in waste water are all removed at this, the outlet of secondary sedimentation tank connects water purifying tank by waste line, only
The outlet in pond will pass through this system treated the outer row of purification water outlet by waste line；Wherein, tea seed cake-aeration floatation purification
System uses high-silicon austenite stainless steel material, internal layer brushing corrosion-resistant finishes, pool bottom to be equipped with 10 micro porous aeration heads,
Every micro porous aeration head is connected to air compressor by gas piping, and 4 groups of totally 8 worry hopper branch are longitudinally provided in the middle part of pond body
Frame, every group of two worry hopper bases are symmetrical, and a tea seed cake filter hopper is respectively and fixedly provided on every group of worry hopper base, and pond body is left
Middle side part is equipped with inlet valve, and the above position of the pond body right hand top water surface is equipped with foam and arranges mouth, below the pond body right hand top water surface
Position is equipped with flowing water Valve；After pH value adjusting processing（PH value is 5.5 ~ 6.5 after processing）Electroplating wastewater pass through tea seed cake-exposure
The inlet valve of gas flotation decontamination systems left side central portion enters inside purification system, 4 tea seed cake filter hoppers being located in the middle part of pond body
In tea seed cake come into full contact with waste water, the Tea Saponin contained in tea seed cake, which is combined and formed with the cadmium ion in waste water, is easy to gas
Floating molecular structure, meanwhile, 10 micro porous aeration heads for being located at pool bottom are started to work, and 80 ~ 120 μm of ultra-fine gas is generated
Bubble, and floating movement is done inside pond body, when ultra-fine bubble is by tea seed cake filter hopper, the tea soap for having combined cadmium ion can be carried secretly
Element floats up to the water surface together, and gradually convergence forms buoyant foam, and buoyant foam is arranged mouth by the foam more than the water surface and arranged
Go out and enter heating concentration basin, by low-temperature heat（50~60℃）Foam waste water after concentration enters alkalization sedimentation basin, in alkalinity
Under the conditions of complete the precipitation process of cadmium, form sludge containing cadmium, to being removed cadmium ion from waste water, and it is sharp to be able to recycling
With；Wherein, the effect of pH value regulating reservoir is will to be adjusted to 5.5 ~ 6.5 by the pH value of waste water of primary sedimentation, to meet tea seed cake-exposure
Gas flotation decontamination systems enter the requirement of water pH value；Wherein, the effect for heating concentration basin is to pass through low-temperature heat（50~60℃）Make bubble
Foam is concentrated；Wherein, the effect of sedimentation basin of alkalizing is that waste water alkalizes, and is allowed to complete the precipitation process of cadmium under alkaline condition
Form sludge containing cadmium；Wherein, the effect in pH value Secondary Control pond be will pass through tea seed cake-aeration flotation decontamination systems treated it is useless
It water and is adjusted to close to neutrality by the pH value of alkalization sedimentation basin treated waste water.
Wherein, the dischargeable capacity of tea seed cake-aeration flotation decontamination systems pond body is 260m3, the volume of tea seed cake filter hopper is
10.5m3, aperture is 25 mesh, and the Tea Saponin content in tea seed cake is 18.5% ~ 21.0%.
Wherein, the operating voltage of the air compressor of tea seed cake-aeration flotation decontamination systems is 380V, and micro porous aeration head can produce
Raw a diameter of 80 ~ 120 μm of bubble, aeration resistance loss are 8500Pa.
The advantage of the invention is that：
（1）This method has broken away from the existing handling principle of purifying electroplating wastewater containing cadmium, and creative being utilized in tea seed cake contains
The cadmium ion flotation characteristic that some Tea Saponins have, under mild acid conditions, Tea Saponin easily occurs to combine and formed with cadmium to be easy to
Pneumatically supported molecular structure is conducive to the progress of subsequent aeration flotation processing.
（2）The a set of aeration floatation system of this method innovative design, longitudinally disposed 4 are assembled with the filtrate of tea seed cake particle
Bucket, as its surface haptoreaction medium, enables the cadmium ion in waste water to be filled with the Tea Saponin contained in tea seed cake particle
Tap touch, improve absorption complex reaction efficiency, improve the processing capacity of whole system, by this method treated plating
Waste water, cadmium ion removal efficiency is up to 97.2%.
（3）This method uses residue of the tea seed after oil expression --- and tea seed cake has as reaction mass without using any
Malicious chemical substance, to eliminate the risk for introducing pollutant that is new, endangering bigger；Meanwhile tea seed cake is of low cost, is easy
It obtains, the Material Cost of wastewater treatment can be substantially reduced.
（4）This method principle is simple and practicable, and design and construction cost is relatively low, and treatment effect is preferable, operation expense
It is very low, be conducive to promote and apply in the vast tea seed growing area in China.
Description of the drawings
Fig. 1 is the equipment schematic diagram of the present invention.
In figure：1- sumps, 2- coarse racks, 3- primary sedimentation basins, 4-pH values regulating reservoir, 5- tea seed cakes-aeration floatation purification
System, 6- heating concentration basin, 7- alkalization sedimentation basin, 8-pH value Secondary Controls pond, 9- secondary sedimentation tanks, 10- water purifying tanks
Fig. 2 is the schematic diagram of tea seed cake-aeration flotation decontamination systems.
51- inlet valves, 52- micro porous aeration heads, 53- gas pipings, 54- air compressors, 55- filter hoppers holder, 56-
Tea seed cake filter hopper, 57- flowing water Valves, 58- foams arrange mouth.
Specific implementation mode
The processing method of cadmium, the electroplating wastewater containing cadmium are entered by waste line in removal electroplating wastewater as shown in Figure 1
Sump 1, carries out centralized collection herein and preliminarily stabilised is adjusted, and the outlet of sump 1 connects coarse rack 2 by waste line,
The major diameter solid matter in waste water is removed at this, the outlet of coarse rack 2 connects primary sedimentation basin 3 by waste line, herein
The insoluble matter in waste water is further removed, the outlet of primary sedimentation basin 3 connects pH value regulating reservoir 4, waste water by waste line
The accurate adjusting of pH value is carried out herein, and the pH value range that pH value regulating reservoir 4 is discharged is 5.5 ~ 6.5, to meet tea seed cake-aeration flotation
Purification system 5 enters the requirement of water pH value, and the outlet of pH value regulating reservoir 4 connects tea seed cake-aeration floatation purification system by waste line
Foam row's mouth of system 5, tea seed cake-aeration flotation decontamination systems 5 connects heating concentration basin 6 by waste line, passes through low temperature herein
Heating（50~60℃）Foam is set to concentrate, the outlet for heating concentration basin 6 connects alkalization sedimentation basin 7, waste water by waste line
Basification is carried out herein, is allowed to complete the precipitation process of cadmium under alkaline condition, form sludge containing cadmium and is recycled, together
When, alkalization sedimentation basin 7 connects pH value Secondary Control by waste line respectively with the outlet of tea seed cake-aeration flotation decontamination systems 5
Pond 8 will pass through tea seed cake-aeration flotation decontamination systems 5 treated waste water and by alkalization sedimentation basin 7 treated waste water herein
PH value be adjusted to close to neutrality, the outlet in pH value Secondary Control pond 8 connects secondary sedimentation tank 9 by waste line, herein will
Other insoluble matters in waste water all remove, and the outlet of secondary sedimentation tank 9 connects water purifying tank 10, water purifying tank by waste line
10 outlet will pass through this system treated the outer row of purification water outlet by waste line；Wherein, tea seed cake-aeration floatation purification system
System 5 uses high-silicon austenite stainless steel material, and the dischargeable capacity of internal layer brushing corrosion-resistant finishes, pond body is 260m3, pool bottom
10 micro porous aeration heads 52 are installed, every micro porous aeration head 52 is connected to air compressor 54, pond body by gas piping 53
Middle part is longitudinally provided with 4 groups of totally 8 worry hopper bases 55, and every group of two worry hopper bases 55 are symmetrical, every group of worry hopper
A tea seed cake filter hopper 56 is respectively and fixedly provided on holder 55, the volume of tea seed cake filter hopper 56 is 10.5m3, aperture is 25 mesh, and pond body is left
Middle side part is equipped with inlet valve 51, and the above position of the pond body right hand top water surface is equipped with foam and arranges mouth 58, the pond body right hand top water surface
Following position is equipped with flowing water Valve 57；After pH value adjusting processing（PH value is 5.5 ~ 6.5 after processing）Electroplating wastewater pass through
The inlet valve 51 of tea seed cake -5 left side central portion of aeration flotation decontamination systems enters inside purification system, 4 be located in the middle part of pond body
Tea seed cake in tea seed cake filter hopper 56 comes into full contact with waste water, and the Tea Saponin contained in tea seed cake is combined with the cadmium ion in waste water
And formed and be easy to pneumatically supported molecular structure, the Tea Saponin mass content in tea seed cake is 18.5% ~ 21.0%, meanwhile, it is located at pond body bottom
10 micro porous aeration heads 52 in portion are started to work, and 80 ~ 120 μm of ultra-fine bubble is generated, and floating movement is done inside pond body, when
When ultra-fine bubble is by tea seed cake filter hopper 56, it can carry secretly and the Tea Saponin of cadmium ion has been combined to float up to the water surface together, and gradually converge
Combinate form arranges mouth 58 by the foam more than the water surface and escapes and enter heating concentration basin 6, pass through at buoyant foam, buoyant foam
Low-temperature heat（50~60℃）Foam waste water after concentration enters alkalization sedimentation basin 7, completes the precipitation of cadmium under alkaline condition
Journey forms sludge containing cadmium, to be removed cadmium ion from waste water, and is recycled；Wherein, pH value regulating reservoir 4
Effect be will pass through primary sedimentation pH value of waste water be adjusted to 5.5 ~ 6.5, to meet tea seed cake-aeration flotation decontamination systems 5
Enter the requirement of water pH value；Wherein, the effect of heating concentration basin 6 is to pass through low-temperature heat（50~60℃）Foam is set to concentrate；Its
In, the effect of alkalization sedimentation basin 7 is that waste water alkalizes, and the precipitation process for being allowed to complete cadmium under alkaline condition is formed containing cadmium dirt
Mud；Wherein, the effect in pH value Secondary Control pond 8 is will to pass through tea seed cake-aeration flotation decontamination systems 5 treated waste water and process
The pH value of alkalization sedimentation basin 7 treated waste water is adjusted to close to neutrality.
By this method treated electroplating wastewater, cadmium ion removal efficiency is up to 97.2%.
Claims (2)
1. it is a kind of removal electroplating wastewater in cadmium processing method, which is characterized in that the electroplating wastewater containing cadmium by waste line into
Enter sump, the outlet of sump connects coarse rack by waste line, and the outlet of coarse rack is connected once by waste line
The outlet of sedimentation basin, primary sedimentation basin connects pH value regulating reservoir by waste line, and the outlet of pH value regulating reservoir passes through waste pipe
Line connects tea seed cake-aeration flotation decontamination systems, and foam row's mouth of tea seed cake-aeration flotation decontamination systems is added by waste line connection
Thermal concentration pond, the outlet for heating concentration basin connect alkalization sedimentation basin, the sludge containing cadmium of alkalization sedimentation basin discharge by waste line
Recycling, meanwhile, alkalization sedimentation basin connects pH by waste line respectively with the outlet of tea seed cake-aeration flotation decontamination systems
It is worth Secondary Control pond, the outlet in pH value Secondary Control pond connects secondary sedimentation tank, the outlet of secondary sedimentation tank by waste line
Water purifying tank is connected by waste line, purification after treatment is discharged outer row by the outlet of water purifying tank by waste line；Its
In, the pool bottoms of tea seed cake-aeration flotation decontamination systems is equipped with 10 micro porous aeration heads, every micro porous aeration head by
Gas piping is connected to air compressor, and 4 groups of totally 8 filter hopper holders, every group of two filter hoppers are longitudinally provided in the middle part of pond body
Holder is symmetrical, and a tea seed cake filter hopper is respectively and fixedly provided on every group of filter hopper holder, and pond body left side central portion is equipped with inlet valve
Door, the above position of the pond body right hand top water surface are equipped with foam and arrange mouth, and position is equipped with flowing water Valve below the pond body right hand top water surface；
By pH value adjust treated electroplating wastewater entered by the inlet valve of tea seed cake-aeration flotation decontamination systems left side central portion it is net
Change internal system, the tea seed cake in 4 tea seed cake filter hoppers in the middle part of pond body comes into full contact with waste water, contains in tea seed cake
Tea Saponin, which is combined and formed with the cadmium ion in waste water, is easy to pneumatically supported molecular structure, meanwhile, be located at pool bottom 10 are micro-
Hole aeration head, which is started to work, generates ultra-fine bubble, and floating movement is done inside pond body, when ultra-fine bubble passes through tea seed cake filter hopper
When, it can carry secretly and the Tea Saponin of cadmium ion has been combined to float up to the water surface together, and gradually convergence forms buoyant foam, buoyant foam is logical
The foam row's mouth crossed more than the water surface escapes and enter heating concentration basin, and the foam waste water after low-temperature heat concentrates enters
Alkalize sedimentation basin, completes the precipitation process of cadmium under alkaline condition, forms sludge containing cadmium, to which cadmium ion to be subject to from waste water
Removal, and recycled；
The dischargeable capacity of tea seed cake-aeration flotation decontamination systems pond body is 260m3, the volume of tea seed cake filter hopper is 10.5m3, aperture is
25 mesh, the Tea Saponin content in tea seed cake are 18.5% -21.0%；
The operating voltage of air compressor in tea seed cake-aeration flotation decontamination systems is 380V, and micro porous aeration head can generate diameter
For 80-120 μm of bubble, aeration resistance loss is 8500Pa.
2. the processing method of cadmium in removal electroplating wastewater according to claim 1, which is characterized in that by pH value adjusting
The pH value of electroplating wastewater after reason is 5.5-6.5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102872831A (en) * | 2012-09-04 | 2013-01-16 | 常州大学 | Compound adsorption material capable of removing cadmium ions in native water and preparation method thereof |
| CN103058409A (en) * | 2011-10-19 | 2013-04-24 | 江西新余国泰特种化工有限责任公司 | Processing method of perchloric acid tricarbohydrazide cadmium wastewater |
| CN103601315A (en) * | 2013-11-12 | 2014-02-26 | 西南科技大学 | Method for treating heavy metal wastewater in mining and metallurgy by use of waste tea dust |
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| CN103058409A (en) * | 2011-10-19 | 2013-04-24 | 江西新余国泰特种化工有限责任公司 | Processing method of perchloric acid tricarbohydrazide cadmium wastewater |
| CN102872831A (en) * | 2012-09-04 | 2013-01-16 | 常州大学 | Compound adsorption material capable of removing cadmium ions in native water and preparation method thereof |
| CN103601315A (en) * | 2013-11-12 | 2014-02-26 | 西南科技大学 | Method for treating heavy metal wastewater in mining and metallurgy by use of waste tea dust |
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| Title |
|---|
| 生物表面活性剂茶皂素离子浮选去除废水中镉离子;孟佑婷等;《环境科学学报》;20051231 * |
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