CN104261625A - Cyanide waste residue leaching solution treatment method - Google Patents
Cyanide waste residue leaching solution treatment method Download PDFInfo
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- CN104261625A CN104261625A CN201410514669.2A CN201410514669A CN104261625A CN 104261625 A CN104261625 A CN 104261625A CN 201410514669 A CN201410514669 A CN 201410514669A CN 104261625 A CN104261625 A CN 104261625A
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- waste residue
- residue leaching
- ozone
- waste water
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- 238000000034 method Methods 0.000 title claims abstract description 69
- 239000002699 waste material Substances 0.000 title claims abstract description 30
- 238000002386 leaching Methods 0.000 title claims abstract description 25
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title abstract description 35
- 239000002351 wastewater Substances 0.000 claims abstract description 57
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000004062 sedimentation Methods 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 29
- 239000003153 chemical reaction reagent Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 238000005189 flocculation Methods 0.000 claims description 21
- 230000016615 flocculation Effects 0.000 claims description 21
- 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 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 238000005273 aeration Methods 0.000 claims description 15
- 230000001580 bacterial effect Effects 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 5
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 5
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 230000001112 coagulating effect Effects 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 241000108664 Nitrobacteria Species 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 238000006385 ozonation reaction Methods 0.000 abstract description 11
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052737 gold Inorganic materials 0.000 abstract description 9
- 239000010931 gold Substances 0.000 abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000701 coagulant Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 6
- 235000011613 Pinus brutia Nutrition 0.000 description 6
- 241000018646 Pinus brutia Species 0.000 description 6
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 4
- 238000005276 aerator Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000011133 lead Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012445 acidic reagent Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical class Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000002572 peristaltic effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- BQVVSSAWECGTRN-UHFFFAOYSA-L copper;dithiocyanate Chemical compound [Cu+2].[S-]C#N.[S-]C#N BQVVSSAWECGTRN-UHFFFAOYSA-L 0.000 description 1
- QPJDMGCKMHUXFD-UHFFFAOYSA-N cyanogen chloride Chemical compound ClC#N QPJDMGCKMHUXFD-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a cyanide waste residue leaching solution treatment method which comprises five steps: SO2/air oxidation method treatment, ozonation treatment, flocculating sedimentation treatment, ultraviolet/ozonation treatment and biofilter treatment. The cyanide waste residue leaching solution treatment method specifically comprises the following steps: firstly, removing pollutants which are easy to treat by adopting SO2/air oxidation method treatment and ozonation treatment; adding coagulants into the treated wastewater for flocculating sedimentation to remove heavy metal pollutants in the wastewater; then, removing hardly treated pollutants in the wastewater under the synergistic effect of ultraviolet and ozone; and finally, removing ammonia nitrogen and other residual pollutants in the wastewater by the biofilter. Aiming at the characteristic that the cyanide waste residue leaching solution in a gold mine contains complex pollutants and is hard to treat, the five steps are combined together to synergistically carry out advanced treatment on the cyanide waste residue leaching solution, so that the method has the advantages of good treatment effect, high treatment efficiency, stable system operation, simple process flow and convenience in industrial application. The treated wastewater returned to the production process flow can be used as reuse water or can be discharged with standard level.
Description
Technical field
The present invention relates to field of Environment Protection Pollutant Treatment method, particularly a kind for the treatment of process of gold mine cyaniding waste residue leaching liquor.
Background technology
Gold mine in recovery process due to use Cyanide Process, a large amount of cyaniding waste residues can be produced, these cyaniding waste residues can produce a large amount of leaching liquors in the process of drenching with rain, not only containing a certain amount of hypertoxic prussiate in these leaching liquors, but also contain the heavy metal ion of thiocyanate-and copper, zinc, lead and so on, if can not get effective process, great environmental protection hidden danger will be produced.At present, the method of conventional Treatment of Cyanide-containing Wastewater has acidifying absorption method, Pomolio-Celdecor process, Yin Kefa, sulfurous gas method etc. both at home and abroad, although adopt acidifying absorption method can reclaim a certain amount of prussiate, but because recovery of cyanide is not thorough, the remaining a certain amount of prussiate of meeting in waste water, thiocyanate ion and some heavy metal ion are not all effectively removed simultaneously.Chlorine residue that can be remaining a large amount of after Pomolio-Celdecor process process, produces ClCN product, causes secondary pollution problem, and the heavy metal ion such as copper, zinc, lead simultaneously in waste water fails effectively to be administered.Although Yin Kefa and sulfurous gas method can make cyanid up to standard, the thiocyanate-in waste water fails to be effectively addressed, and in addition, the waste residue produced in process heavy metal process is also more, easily causes secondary pollution.Therefore, also still lack more satisfactory method in cyanide wastewater process, if resolve this problem, have important meaning by the Sustainable development of China's gold industry and the environment protection of gold mine.
Summary of the invention
Object of the present invention is exactly the problems referred to above existed for existing treatment process, and provides the cyaniding waste residue leaching liquor treatment process that a kind of technical process is simple, treatment effect good, processing efficiency is high, stable.The present invention is according to the feature containing multiple pollutants such as prussiate, thiocyanate-and heavy metals in gold mine cyaniding waste residue leaching liquor, first select Yin Kefa and Ozonation by tractable pollutant removal, waste water after process carries out coagulating sedimentation by dosing coagulant, remove the heavy metal contaminants in waste water, then under the synergy of ultraviolet and ozone, by the difficult pollutant removal of waste water remnants, finally by biological filter, the ammonia nitrogen in waste water and some other residual contaminants are removed.Concrete technology step is as follows:
(1) under stirring and aeration state, add acid-base reagent, pyrosulphite sodium reagent and catalyzer in waste water, ensure that the pH value of reaction process controls between 8 ~ 10, the reaction times is 30min ~ 120min;
(2) reacted waste water enters ozone treating system, passes into ozone and carries out oxide treatment, and the treatment time is 15min ~ 120min;
(3) waste water after process adds flocculation agent successively under whipped state and flocculation agent carries out coagulating sedimentation, and after coagulation, waste water enters settling tank and staticly settles 15min ~ 120min;
(4) wastewater supernatant fluid after precipitation enters into UV/ozone treatment system, and waste water is under ultra violet lamp condition, and pass into ozone and carry out ultraviolet and the reaction of ozone cooperative advanced oxidation, the reaction times is 15min ~ 120min;
(5) after reaction, waste water enters biological filter chamber treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after having processed returns in the technological process of production or qualified discharge.
In described step (1), stirring linear velocity is 0.01m/s ~ 10m/s; The vapour-liquid ratio that during aeration, air passes into is 3 ~ 50:1; Acid reagent is sulfuric acid or hydrochloric acid, and alkali reagent is sodium hydroxide solution or milk of lime; Pyrosulphite sodium reagent is the sodium metabisulfite solution of massfraction 5% ~ 30%, catalyzer is the copper-bath of massfraction 5% ~ 30%, the dosage of pyrosulphite sodium reagent is how many and process index request and determining according to the cyanide content in waste water quality, cyanide content is high, process index request is tight, the dosage of pyrosulphite sodium reagent is corresponding to be increased, otherwise cyanide content is low, process index request pine, the corresponding minimizing of dosage of pyrosulphite sodium reagent; The dosage of catalyzer is determined according to the content of bivalent cupric ion in the dosage of pyrosulphite sodium reagent and cyanide wastewater, the dosage of catalyzer becomes positive line sexual intercourse with the dosage of pyrosulphite sodium reagent, and the bivalent cupric ion content in cyanide wastewater partly or entirely can replace the dosage of catalyzer.
In described step (2), ozone intake is determined according to the number of the prussiate in waste liquid and COD content and processing requirements, prussiate and COD content is high, process index request tight, the intake of ozone is corresponding to be increased, otherwise, prussiate and COD content is low, process index request pine, the corresponding minimizing of intake of ozone.
In described step (3), stirring linear velocity is 0.01m/s ~ 10m/s, and flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
In described step (4), ultraviolet lamp wavelength is 200nm ~ 400nm, the power of ultraviolet lamp and the intake of ozone be how many and process index request and determining according to cyanide content remaining in waste water, cyanide content is high, process index request is tight, the corresponding increase of power of ultraviolet lamp, and the intake of ozone is corresponding to be increased, otherwise, cyanide content is low, process index request pine, the corresponding reduction of power of ultraviolet lamp, the corresponding minimizing of intake of ozone.
In described step (5), biological filter is upflowing or downflow system reaction tank, water-distributing device and aerating apparatus is provided with at the bottom of pond, be gac, zeolite or biological potsherd filling layer above aerating apparatus, loadings accounts for 1/5 ~ 4/5 of reactor volume, biofilm bacterial classification is nitrite bacteria and nitrobacteria, and bacterial classification biofilm mode is taked manually to add bacterial classification biofilm or Biofilmculturing, and vapour-liquid ratio is set as 1 ~ 15:1.
Beneficial effect of the present invention:
The present invention is according to, unmanageable feature complicated containing pollutent in gold mine cyaniding waste residue leaching liquor, Yin Kefa, Ozonation, coagulant sedimentation, UV/ozone high-level oxidation technology and biological filter treatment technology are combined, work in coordination with and advanced treatment is carried out to cyaniding waste residue leaching liquor, have that treatment effect is good, processing efficiency is high, system run all right, technical process is simple, be convenient to the advantage realizing industrial application, the waste water after process can return the technological process of production and use or qualified discharge as reuse water.
Embodiment
The present invention includes following steps:
(1) under stirring and aeration state, add acid-base reagent, pyrosulphite sodium reagent and catalyzer in waste water, ensure that the pH value of reaction process controls between 8 ~ 10, the reaction times is 30min ~ 120min;
(2) reacted waste water enters ozone treating system, passes into ozone and carries out oxide treatment, and the treatment time is 15min ~ 120min;
(3) waste water after process adds flocculation agent successively under whipped state and flocculation agent carries out coagulating sedimentation, and after coagulation, waste water enters settling tank and staticly settles 15min ~ 120min;
(4) wastewater supernatant fluid after precipitation enters into UV/ozone treatment system, and waste water is under ultra violet lamp condition, and pass into ozone and carry out ultraviolet and the reaction of ozone cooperative advanced oxidation, the reaction times is 15min ~ 120min;
(5) after reaction, waste water enters biological filter chamber treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after having processed returns in the technological process of production or qualified discharge.
In described step (1), stirring linear velocity is 0.01m/s ~ 10m/s; The vapour-liquid ratio that during aeration, air passes into is 3 ~ 50:1; Acid reagent is sulfuric acid or hydrochloric acid, and alkali reagent is sodium hydroxide solution or milk of lime; Pyrosulphite sodium reagent is the sodium metabisulfite solution of massfraction 5% ~ 30%, catalyzer is the copper-bath of massfraction 5% ~ 30%, the dosage of pyrosulphite sodium reagent is how many and process index request and determining according to the cyanide content in waste water quality, cyanide content is high, process index request is tight, the dosage of pyrosulphite sodium reagent is corresponding to be increased, otherwise cyanide content is low, process index request pine, the corresponding minimizing of dosage of pyrosulphite sodium reagent; The dosage of catalyzer is determined according to the content of bivalent cupric ion in the dosage of pyrosulphite sodium reagent and cyanide wastewater, the dosage of catalyzer becomes positive line sexual intercourse with the dosage of pyrosulphite sodium reagent, and the bivalent cupric ion content in cyanide wastewater partly or entirely can replace the dosage of catalyzer.
In described step (2), ozone intake is determined according to the number of the prussiate in waste liquid and COD content and processing requirements, prussiate and COD content is high, process index request tight, the intake of ozone is corresponding to be increased, otherwise, prussiate and COD content is low, process index request pine, the corresponding minimizing of intake of ozone.
In described step (3), stirring linear velocity is 0.01m/s ~ 10m/s, and flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
In described step (4), ultraviolet lamp wavelength is 200nm ~ 400nm, the power of ultraviolet lamp and the intake of ozone be how many and process index request and determining according to cyanide content remaining in waste water, cyanide content is high, process index request is tight, the corresponding increase of power of ultraviolet lamp, and the intake of ozone is corresponding to be increased, otherwise, cyanide content is low, process index request pine, the corresponding reduction of power of ultraviolet lamp, the corresponding minimizing of intake of ozone.
In described step (5), biological filter is upflowing or downflow system reaction tank, water-distributing device and aerating apparatus is provided with at the bottom of pond, be gac, zeolite or biological potsherd filling layer above aerating apparatus, loadings accounts for 1/5 ~ 4/5 of reactor volume, biofilm bacterial classification is nitrite bacteria and nitrobacteria, and bacterial classification biofilm mode is taked manually to add bacterial classification biofilm or Biofilmculturing, and vapour-liquid ratio is set as 1 ~ 15:1.
Specific examples 1:
Certain gold mine cyaniding waste residue leaching liquor, pH is 9.6, CN
tfor 236.65mg/L, SCN
-for 78.48mg/L, Cu
2+for 82.56mg/L, COD are 217.45mg/L, NH
3-N is 34.26mg/L, other heavy metal ion in addition containing trace.Get 3L waste water to be placed in and to be equipped with in the oxidizing reaction groove of stirring system and aerating system, open stirring system, regulating and stirring linear velocity is 0.8m/s, open aerating system, aeration rate is adjusted to 1L/min, slowly add the sodium metabisulfite solution 15mL of massfraction 10%, reaction 30min, stop aeration, reacted waste liquid is placed in ozone-oxidizing device, ozone-oxidizing device interior bottom portion is provided with ceramic micropore aerator, reaction starts the ozonation aerated system of rear unlatching, pass into ozone reaction 30min, ozone intake is 320mg, reaction terminates rear stopping and passing into ozone, waste water is moved in steel basin, open and stir, the polymeric aluminum chlorides solution 15mL adding 10g/L under stirring linear velocity is 0.8m/s condition stirs 5min, then massfraction 0.5 ‰ anionic polyacrylamide solution 4mL is added, regulate after continuing to stir 2min and stir linear velocity 0.1m/s stirring 5min, stop stirring, leave standstill 30min, with peristaltic pump supernatant liquor is pumped in the reactor that ultraviolet lamp device and ozonation aerated device are housed, ultraviolet lamp power is 4W, wavelength is 254nm, erect the central position being placed on inside reactor, ozonation aerated device adopts ceramic micropore aerator, be placed in the bottom in reactor, reaction starts rear unlatching ultraviolet lamp, pass into ozone reaction 30min, ozone intake is 210mg, reaction terminates rear stopping and passing into ozone, waste water is moved in biological filter and processes, biological filter is upflowing bio-reactor, biological filter filling filler is particulate coal activated carbon, amount of fill is 5kg, air aeration device adopts Ti-alloyed filter element, be placed in reactor bottom, vapour-liquid ratio is set as 3:1, reactor carries out biofilm by manually adding bacterial classification, the waste water reaction residence time is 60min.The water outlet of waste water after system process through assay pH between 8 ~ 9, CN
t< 0.1mg/L, SCN
-< 0.5mg/L, Cu
2+< 0.5mg/L, COD < 20mg/L, NH
3-N < 1.0mg/L, first kind pollutent is all within the highest permission emission concentration limit value, and after process, water quality can reach reuse or emission standard.
Specific examples 2:
Certain gold mine cyaniding waste residue leaching liquor, pH is 8.5, CN
tfor 123.26mg/L, SCN
-for 45.62mg/L, Cu
2+for 7.83mg/L, Fe
3+for 24.69mg/L, Pb
2+for 5.42mg/L, COD are 142.55mg/L, NH
3-N is 22.73mg/L, other heavy metal ion in addition containing trace.Get 3L waste water to be placed in and to be equipped with in the oxidizing reaction groove of stirring system and aerating system, open stirring system, regulating and stirring linear velocity is 0.8m/s, open aerating system, aeration rate is adjusted to 1L/min, slowly add the sodium metabisulfite solution 10mL of the massfraction 10% and copper-bath 1mL of massfraction 5%, reaction 30min, stop aeration, reacted waste liquid is placed in ozone-oxidizing device, ozone-oxidizing device interior bottom portion is provided with ceramic micropore aerator, reaction starts the ozonation aerated system of rear unlatching, pass into ozone reaction 30min, ozone intake is 180mg, reaction terminates rear stopping and passing into ozone, waste water is moved in steel basin, open and stir, the polymeric aluminum chlorides solution 10mL adding 10g/L under stirring linear velocity is 0.8m/s condition stirs 5min, then massfraction 0.5 ‰ anionic polyacrylamide solution 2mL is added, regulate after continuing to stir 2min and stir linear velocity 0.1m/s stirring 5min, stop stirring, leave standstill 30min, with peristaltic pump supernatant liquor is pumped in the reactor that ultraviolet lamp device and ozonation aerated device are housed, ultraviolet lamp power is 4W, wavelength is 254nm, erect the central position being placed on inside reactor, ozonation aerated device adopts ceramic micropore aerator, be placed in the bottom in reactor, reaction starts rear unlatching ultraviolet lamp, pass into ozone reaction 30min, ozone intake is 150mg, reaction terminates rear stopping and passing into ozone, waste water is moved in biological filter and processes, biological filter is upflowing bio-reactor, biological filter filling filler is particulate coal activated carbon, amount of fill is 5kg, air aeration device adopts Ti-alloyed filter element, be placed in reactor bottom, vapour-liquid ratio is set as 3:1, reactor carries out biofilm by manually adding bacterial classification, the waste water reaction residence time is 60min.The water outlet of waste water after system process through assay pH between 8 ~ 9, CN
t< 0.1mg/L, SCN
-< 0.5mg/L, Cu
2+< 0.5mg/L, COD < 20mg/L, NH
3-N < 1.0mg/L, first kind pollutent is all within the highest permission emission concentration limit value, and after process, water quality can reach reuse or emission standard.
Claims (10)
1. a cyaniding waste residue leaching liquor treatment process, the step of the method is as follows:
(1) under stirring and aeration state, add acid-base reagent, pyrosulphite sodium reagent and catalyzer in waste water, ensure that the pH value of reaction process controls between 8 ~ 10, the reaction times is 30min ~ 120min;
(2) reacted waste water enters ozone treating system, passes into ozone and carries out oxide treatment, and the treatment time is 15min ~ 120min;
(3) waste water after process adds flocculation agent successively under whipped state and flocculation agent carries out coagulating sedimentation, and after coagulation, waste water enters settling tank and staticly settles 15min ~ 120min;
(4) wastewater supernatant fluid after precipitation enters into UV/ozone treatment system, and waste water is under ultra violet lamp condition, and pass into ozone and carry out ultraviolet and the reaction of ozone cooperative advanced oxidation, the reaction times is 15min ~ 120min;
(5) after reaction, waste water enters biological filter chamber treatment system, under the condition of biologic packing material, biofilm bacterial classification and air aeration, carries out a biological disposal upon;
(6) waste water after having processed returns in the technological process of production or qualified discharge.
2. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (1), stirring linear velocity is 0.01m/s ~ 10m/s.
3. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (1), the vapour-liquid ratio that during aeration, air passes into is 3 ~ 50:1.
4. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (1), sour reagent is sulfuric acid or hydrochloric acid, and alkali reagent is sodium hydroxide solution or milk of lime.
5. cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (1), pyrosulphite sodium reagent is the sodium metabisulfite solution of massfraction 5% ~ 30%; Described catalyzer is the copper-bath of massfraction 5% ~ 30%.
6. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (3), stirring linear velocity is 0.01m/s ~ 10m/s.
7. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (3), flocculation agent is polymer-inorganic salt flocculation agent, and flocculation agent is polyacrylamide, and flocculation agent and flocculation agent are all mixed with solution state and add.
8. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (4), ultraviolet lamp wavelength is 200nm ~ 400nm.
9. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (5), biological filter is upflowing or downflow system reaction tank, water-distributing device and aerating apparatus is provided with at the bottom of pond, be gac, zeolite or biological potsherd filling layer above aerating apparatus, loadings accounts for 1/5 ~ 4/5 of reactor volume.
10. a kind of cyaniding waste residue leaching liquor treatment process according to claim 1, it is characterized in that: in described step (5), biological filter biofilm bacterial classification is nitrite bacteria and nitrobacteria, bacterial classification biofilm mode is taked manually to add bacterial classification biofilm or Biofilmculturing, and vapour-liquid ratio is set as 1 ~ 15:1.
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