CN110950499A - Copper ammonia complex wastewater treatment system and process - Google Patents
Copper ammonia complex wastewater treatment system and process Download PDFInfo
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- CN110950499A CN110950499A CN201911321957.5A CN201911321957A CN110950499A CN 110950499 A CN110950499 A CN 110950499A CN 201911321957 A CN201911321957 A CN 201911321957A CN 110950499 A CN110950499 A CN 110950499A
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- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 93
- 238000004062 sedimentation Methods 0.000 claims abstract description 92
- 239000002351 wastewater Substances 0.000 claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000010949 copper Substances 0.000 claims abstract description 27
- 240000009108 Chlorella vulgaris Species 0.000 claims abstract description 25
- 235000007089 Chlorella vulgaris Nutrition 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- 239000012028 Fenton's reagent Substances 0.000 claims abstract description 23
- CDMIYIVDILNBIJ-UHFFFAOYSA-N triazinane-4,5,6-trithione Chemical compound SC1=NN=NC(S)=C1S CDMIYIVDILNBIJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002253 acid Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 20
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 18
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 244000207867 Pistia stratiotes Species 0.000 claims abstract description 14
- 235000006440 Pistia stratiotes Nutrition 0.000 claims abstract description 12
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 10
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims abstract description 7
- 240000003826 Eichhornia crassipes Species 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 35
- 238000000926 separation method Methods 0.000 claims description 28
- 239000006228 supernatant Substances 0.000 claims description 28
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- 239000003344 environmental pollutant Substances 0.000 claims description 23
- 231100000719 pollutant Toxicity 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000012716 precipitator Substances 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 18
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 16
- 241000196324 Embryophyta Species 0.000 claims description 16
- 229910001431 copper ion Inorganic materials 0.000 claims description 16
- 150000001408 amides Chemical class 0.000 claims description 14
- 229920002554 vinyl polymer Polymers 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 13
- 230000001590 oxidative effect Effects 0.000 claims description 12
- 230000001376 precipitating effect Effects 0.000 claims description 10
- 239000003619 algicide Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 7
- 239000010802 sludge Substances 0.000 claims description 7
- 230000000536 complexating effect Effects 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 4
- 238000010170 biological method Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000013048 microbiological method Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 8
- 241000169203 Eichhornia Species 0.000 description 6
- 230000000593 degrading effect Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 244000005700 microbiome Species 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 241000233805 Phoenix Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005342 ion exchange Methods 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
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- 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
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- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
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- C02F1/722—Oxidation by peroxides
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Abstract
The invention provides a system and a process for treating copper ammonia complex wastewater, wherein the system comprises an adjusting tank, a first reaction tank, a second reaction tank, a first sedimentation tank, an acid adjusting tank, a Fenton tank, an alkali adjusting tank, a second sedimentation tank, a neutralization tank, a third reaction tank, a third sedimentation tank, a fourth reaction tank, an A/O tank, a fourth sedimentation tank, a disinfection tank and a discharge tank which are sequentially arranged according to a wastewater treatment process. The wastewater treatment process provided by the invention combines a chemical method, a biological method and a microbiological method, utilizes trimercaptotriazine trisodium salt as a heavy metal trapping agent, utilizes a Fenton reagent to carry out advanced oxidation on wastewater, utilizes chlorella vulgaris to absorb and remove nitrogen and copper in a water body, and utilizes water hyacinth and Pistia stratiotes to adsorb ammonia nitrogen and organic pollutants in the wastewater, so that the problem of breaking copper-ammonia complex in the copper-ammonia complex wastewater treatment is solved, the treatment process is simple, the cost is low, no secondary pollution is caused, and the method is suitable for industrial popularization.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a system and a process for treating copper ammonia complexing wastewater.
Background
The waste water treatment is to treat waste water by physical, chemical and biological methods, so that various pollutants in the waste water are degraded and recovered or discharged after reaching the corresponding standards, and water resources are fully utilized or the pollution to the environment is reduced.
In the electronic industry, cuprammonia complexing wastewater belongs to a common wastewater in industrial production. Cu in such wastewater2+With ligands NH3Combine to form stable soluble [ Cu (NH) ]3)4]2+The complex, which is traditionally difficult to degrade by the industry, can also have an irreversible effect on the treatment process itself. The common methods for treating copper include sulfide precipitation, ferrous sulfate reduction, iron powder reduction, aluminum catalytic reduction, oxidation, adsorption, ion exchange, etc., and these conventional methods have high cost, are likely to cause secondary pollution, and have poor treatment effect. After the copper is removed by breaking the complex, the wastewater needs to be treated by a chemical method and a biochemical method. At present, the traditional process method has certain difficulty for the treatment of the cuprammonia complexing wastewater to reach the emission standard of pollutants in the electronic industry.
Disclosure of Invention
In order to solve the technical problem, the invention provides a system for treating copper ammonia complex wastewater, which comprises an adjusting tank, a first reaction tank, a first sedimentation tank, an acid adjusting tank, a fenton tank, an alkali adjusting tank, a second sedimentation tank, a neutralization tank, a third reaction tank, a third sedimentation tank, a fourth reaction tank, an a/O tank, a fourth sedimentation tank, a disinfection tank and a discharge tank which are sequentially arranged according to a wastewater treatment process.
The fourth reaction tank is of a secondary structure, and the primary tank body is deeper than the secondary tank body.
Wherein, the A/O pool is an integrated pool body, and the hydraulic retention time ratio of the A/O pool is that of the A pool: pool O is 1: 3.
The invention provides a copper ammonia complex wastewater treatment process, which comprises the following steps:
(1) collecting the wastewater in an adjusting tank, and stirring to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating tank to a first reaction tank, and adding a heavy metal trapping agent to cause a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and the pH value is regulated to be acidic;
(6) the wastewater after the acid adjustment enters a Fenton pool, a Fenton reagent is added, and pollutants are oxidized and degraded by utilizing the strong oxidizing property of OH free radicals generated by the Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to be alkaline;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and a precipitator is added for sedimentation to complete solid-liquid separation;
(9) the supernatant in the second sedimentation tank flows into a neutralization tank, and the pH value is adjusted to be neutral;
(10) the water in the neutralization tank enters a third reaction tank, an algaecide is added, and ammonia nitrogen and copper in the wastewater are removed by utilizing the absorption effect of the algaecide on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and a precipitator is added for sedimentation to complete solid-liquid separation;
(12) enabling the supernatant in the third sedimentation tank to flow into a fourth reaction tank, adding floating plants, and further removing pollutants in the wastewater by utilizing the adsorption effect of the floating plants on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and a precipitator is added for sedimentation to complete solid-liquid separation;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
The heavy metal trapping agent is trimercaptotriazine trisodium salt, the precipitating agent is one or a combination of polyaluminium chloride and polyvinyl amide, the algicide is chlorella vulgaris, and the floating plant is one or a combination of water hyacinth or pistia stratiotes.
Wherein, hydrochloric acid is adopted in the acid adjusting pool to adjust the pH value, and the range of the pH value is between 3 and 4.5.
Wherein, the pH value is adjusted by sodium hydroxide in the alkali adjusting pool, and the range of the pH value is between 9.5 and 11.
Wherein the ratio of the trimercaptotriazine trisodium salt to the copper ions in the wastewater is 1-3: 3.
Wherein the adding proportion of the Fenton reagent is n (H)2O2:COD)＝1-3:1，n(H2O2：Fe2+)＝3-6:1。
Wherein, in the third reaction tank, the algaecide is 0.5-1g/m in dry weight3Adding; in the fourth reaction tank, the adding amount of the floating plants is 25-40 plants/m2。
The invention has the beneficial effects that:
the system and the process for treating the copper ammonia complexing wastewater provided by the invention have the following advantages:
(1) the method has the characteristics of strong pertinence, complete treatment process and good treatment effect, and combines a chemical method, a biological method and a microbiological method, so that the effluent reaches the discharge standard of the polluted wastewater in the electronic industry;
(2) the problem of difficult complex breaking of copper ammonia in copper ammonia complex wastewater treatment is solved, and copper ions are trapped and removed by using trimercapto-triazine trisodium salt as a heavy metal trapping agent, so that the treatment effect is good, and the copper ions are nontoxic and cannot cause secondary pollution;
(3) the Fenton reagent is used for carrying out advanced oxidation on the wastewater, so that the toxicity of the wastewater on microorganisms is removed, the B/C ratio of the wastewater can be improved while organic pollutants are removed, and the biodegradability of the wastewater is enhanced;
(4) the chlorella vulgaris is used as an algicide in the third reaction tank, and the nitrogen and copper in the water body are absorbed and removed by utilizing the characteristic of tolerance of the chlorella vulgaris to the nitrogen and copper, so that the cost is low, and no secondary pollution is caused;
(5) the fourth reaction tank uses water hyacinth and pistia stratiotes as floating plants to adsorb ammonia nitrogen and organic pollutants in the wastewater, and microorganisms fixed at the roots of the water hyacinth and the pistia stratiotes also have a certain purification effect on water quality, so that the cost is low and no secondary pollution is caused.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it should be obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a copper ammonia complex wastewater treatment system provided by an embodiment of the invention.
Detailed Description
The following is a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.
The invention provides a copper ammonia complex wastewater treatment system, which comprises an adjusting tank, a first reaction tank, a second reaction tank, a first sedimentation tank, an acid regulating tank, a Fenton tank, an alkali regulating tank, a second sedimentation tank, a neutralization tank, a third reaction tank, a third sedimentation tank, a fourth reaction tank, an A/O tank, a fourth sedimentation tank, a disinfection tank and a discharge tank which are sequentially arranged according to a wastewater treatment process; the fourth reaction tank is of a secondary structure, the primary tank body is deeper than the secondary tank body, wherein the depth of the primary tank body is 1.5m, and the depth of the secondary tank body is 1 m; the A/O pool is an integrated pool body, and the hydraulic retention time ratio of the A/O pool is that of the A pool: pool O is 1: 3.
Example 1
The process for treating the wastewater by adopting the copper ammonia complex wastewater treatment system provided by the invention comprises the following steps:
(1) collecting the wastewater into an adjusting tank, and adjusting to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating reservoir to a first reaction tank, adding a heavy metal trapping agent trimercapto triazine trisodium salt, wherein the ratio of the trimercapto triazine trisodium salt to copper ions in the wastewater is n (trimercapto triazine trisodium salt: copper) 2:3, and enabling a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and hydrochloric acid is adopted to regulate the pH value to 4;
(6) the wastewater after the acid adjustment enters a Fenton pool, and a Fenton reagent is added, wherein the adding proportion of the Fenton reagent is n (H)2O2:COD)＝1.5:1，n(H2O2：Fe2+) 1, oxidizing and degrading pollutants by utilizing the strong oxidizing property of OH free radicals generated by Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to 10 by adopting sodium hydroxide;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and a precipitator polyaluminium chloride is added for sedimentation to complete solid-liquid separation;
(9) supernatant in the second sedimentation tank flows into a neutralization tank, and hydrochloric acid is adopted to adjust the pH value to be neutral;
(10) the water in the neutralization pond enters a third reaction pond, and Chlorella vulgaris (Chlorella vulgaris) is added, wherein the dry weight of the Chlorella vulgaris is 0.5g/m3Adding, namely removing ammonia nitrogen and copper in the wastewater by utilizing the absorption effect of the chlorella vulgaris on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and a precipitator, namely polyaluminium chloride, is added for sedimentation, so that solid-liquid separation is completed;
(12) the supernatant in the third sedimentation tank flows into a fourth reaction tank, and floating plant Eichhorniacrassipes (Mart.) Solms is added, wherein the adding amount of the Eichhorniacrassipes is 30 plants/m2Further removing pollutants in the wastewater by utilizing the adsorption effect of the water hyacinth on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and a precipitator, namely polyaluminium chloride, is added for sedimentation, so that solid-liquid separation is completed;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
Example 2
The process for treating the wastewater by adopting the copper ammonia complex wastewater treatment system provided by the invention comprises the following steps:
(1) collecting the wastewater into an adjusting tank, and adjusting to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating reservoir to a first reaction tank, adding a heavy metal trapping agent trimercapto triazine trisodium salt, wherein the ratio of the trimercapto triazine trisodium salt to copper ions in the wastewater is n (trimercapto triazine trisodium salt: copper) 1:3, and enabling a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and hydrochloric acid is adopted to regulate the pH value to 3.5;
(6) the wastewater after the acid adjustment enters a Fenton pool, and a Fenton reagent is added, wherein the adding proportion of the Fenton reagent is n (H)2O2:COD)＝2:1，n(H2O2：Fe2+) 1, oxidizing and degrading pollutants by utilizing the strong oxidizing property of OH free radicals generated by Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to 10.5 by adopting sodium hydroxide;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and a precipitator, namely polyvinyl amide, is added for sedimentation, so that solid-liquid separation is completed;
(9) supernatant in the second sedimentation tank flows into a neutralization tank, and hydrochloric acid is adopted to adjust the pH value to be neutral;
(10) the water in the neutralization pond enters a third reaction pond, and Chlorella vulgaris (Chlorella vulgaris) is added, wherein the dry weight of the Chlorella vulgaris is 0.75g/m3Adding, namely removing ammonia nitrogen and copper in the wastewater by utilizing the absorption effect of the chlorella vulgaris on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and a precipitator, namely polyvinyl amide, is added for sedimentation, so that solid-liquid separation is completed;
(12) supernatant in the third sedimentation tank flows into a fourth reaction tank, and floating plant pistia stratiotes (Pistiostrata) is added, wherein the adding amount of the pistia stratiotes is 35 strains/m2Further removing pollutants in the wastewater by utilizing the adsorption effect of the pistia stratiotes on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and a precipitator, namely polyvinyl amide, is added for sedimentation, so that solid-liquid separation is completed;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
Example 3
The process for treating the wastewater by adopting the copper ammonia complex wastewater treatment system provided by the invention comprises the following steps:
(1) collecting the wastewater into an adjusting tank, and adjusting to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating reservoir to a first reaction tank, adding a heavy metal trapping agent trimercapto triazine trisodium salt, wherein the ratio of the trimercapto triazine trisodium salt to copper ions in the wastewater is n (trimercapto triazine trisodium salt: copper) 2:3, and enabling a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and hydrochloric acid is adopted to regulate the pH value to 4.5;
(6) the wastewater after the acid adjustment enters a Fenton pool, and a Fenton reagent is added, wherein the adding proportion of the Fenton reagent is n (H)2O2:COD)＝3:1，n(H2O2：Fe2+) 1, oxidizing and degrading pollutants by utilizing the strong oxidizing property of OH free radicals generated by Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to 9 by adopting sodium hydroxide;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation to complete solid-liquid separation;
(9) supernatant in the second sedimentation tank flows into a neutralization tank, and hydrochloric acid is adopted to adjust the pH value to be neutral;
(10) the water in the neutralization pond enters a third reaction pond, and Chlorella vulgaris (Chlorella vulgaris) is added, wherein the dry weight of the Chlorella vulgaris is 1g/m3The mixture is added into the mixture,removing ammonia nitrogen and copper in the wastewater by utilizing the absorption effect of chlorella vulgaris on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(12) supernatant in the third sedimentation tank flows into a fourth reaction tank, and floating plant pistia stratiotes (Pistiostrata) is added, wherein the adding amount of the pistia stratiotes is 25 plants/m2Further removing pollutants in the wastewater by utilizing the adsorption effect of the pistia stratiotes on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
Example 4
The process for treating the wastewater by adopting the copper ammonia complex wastewater treatment system provided by the invention comprises the following steps:
(1) collecting the wastewater into an adjusting tank, and adjusting to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating reservoir to a first reaction tank, adding a heavy metal trapping agent trimercapto triazine trisodium salt, wherein the ratio of the trimercapto triazine trisodium salt to copper ions in the wastewater is n (trimercapto triazine trisodium salt: copper) 3:3, and enabling a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and hydrochloric acid is adopted to regulate the pH value to 3;
(6) the wastewater after the acid adjustment enters a Fenton pool, and a Fenton reagent is added into the Fenton pool, wherein the wastewater after the acid adjustment is carried outThe adding proportion of the Fenton reagent is n (H)2O2:COD)＝2.5:1，n(H2O2：Fe2+) Oxidizing and degrading pollutants by utilizing the strong oxidizing property of OH free radicals generated by Fenton reagent (4.5: 1);
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to 11 by adopting sodium hydroxide;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation to complete solid-liquid separation;
(9) supernatant in the second sedimentation tank flows into a neutralization tank, and hydrochloric acid is adopted to adjust the pH value to be neutral;
(10) the water in the neutralization pond enters a third reaction pond, and Chlorella vulgaris (Chlorella vulgaris) is added, wherein the dry weight of the Chlorella vulgaris is 0.5g/m3Adding, namely removing ammonia nitrogen and copper in the wastewater by utilizing the absorption effect of the chlorella vulgaris on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(12) supernatant in the third sedimentation tank flows into a fourth reaction tank, floating plants of Eichhornia crassipes (Mart.) Solms and Pistia stratiotes are added, and the adding amount of the Eichhornia crassipes and the Pistia stratiotes is 30 plants/m2Further removing pollutants in the wastewater by utilizing the adsorption effect of water hyacinth and pistia stratiotes on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
Example 5
The process for treating the wastewater by adopting the copper ammonia complex wastewater treatment system provided by the invention comprises the following steps:
(1) collecting the wastewater into an adjusting tank, and adjusting to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating reservoir to a first reaction tank, adding a heavy metal trapping agent trimercapto triazine trisodium salt, wherein the ratio of the trimercapto triazine trisodium salt to the copper ions in the wastewater is n (trimercapto triazine trisodium salt: copper) 2.5:3, and enabling a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and hydrochloric acid is adopted to regulate the pH value to 4.5;
(6) the wastewater after the acid adjustment enters a Fenton pool, and a Fenton reagent is added, wherein the adding proportion of the Fenton reagent is n (H)2O2:COD)＝2:1，n(H2O2：Fe2+) 1, oxidizing and degrading pollutants by utilizing the strong oxidizing property of OH free radicals generated by Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to 10.5 by adopting sodium hydroxide;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and a precipitator, namely polyvinyl amide, is added for sedimentation, so that solid-liquid separation is completed;
(9) supernatant in the second sedimentation tank flows into a neutralization tank, and hydrochloric acid is adopted to adjust the pH value to be neutral;
(10) the water in the neutralization pond enters a third reaction pond, and Chlorella vulgaris (Chlorella vulgaris) is added, wherein the dry weight of the Chlorella vulgaris is 0.8g/m3Adding, namely removing ammonia nitrogen and copper in the wastewater by utilizing the absorption effect of the chlorella vulgaris on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(12) the supernatant in the third sedimentation tank flows into a fourth reaction tank, and a floating plant phoenix is addedEichhorniacrassipes (Mart.) Solms) with the addition amount of 35 plants/m2Further removing pollutants in the wastewater by utilizing the adsorption effect of the water hyacinth on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank, and precipitating agents of polyaluminium chloride and polyvinyl amide are added for sedimentation, so that solid-liquid separation is completed;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the present invention, and these changes and modifications are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a copper ammonia complex effluent disposal system which characterized in that: the system comprises an adjusting tank, a first reaction tank, a second reaction tank, a first sedimentation tank, an acid adjusting tank, a Fenton tank, an alkali adjusting tank, a second sedimentation tank, a neutralization tank, a third reaction tank, a third sedimentation tank, a fourth reaction tank, an A/O tank, a fourth sedimentation tank, a disinfection tank and a discharge tank which are arranged in sequence according to the treatment flow of wastewater.
2. The system for treating the cuprammonia complexing wastewater according to claim 1, wherein: the fourth reaction tank is of a secondary structure, and the primary tank body is deeper than the secondary tank body.
3. The system for treating the cuprammonia complexing wastewater according to claim 1, wherein: the A/O pool is an integrated pool body, and the hydraulic retention time ratio of the A/O pool is that of the A pool: o pool =1: 3.
4. A copper ammonia complex wastewater treatment process is characterized by comprising the following steps:
(1) collecting the wastewater in an adjusting tank, and stirring to uniformly mix the wastewater;
(2) lifting the wastewater in the regulating tank to a first reaction tank, and adding a heavy metal trapping agent to cause a copper-ammonia complex to generate a complex breaking reaction;
(3) the water in the first reaction tank flows into the second reaction tank, and a precipitator is added and uniformly mixed through stirring;
(4) the mixed liquid in the second reaction tank flows into the first sedimentation tank to complete solid-liquid separation and remove copper ions;
(5) the supernatant in the first sedimentation tank flows into an acid regulating tank, and the pH value is regulated to be acidic;
(6) the wastewater after the acid adjustment enters a Fenton pool, a Fenton reagent is added, and pollutants are oxidized and degraded by utilizing the strong oxidizing property of OH free radicals generated by the Fenton reagent;
(7) the wastewater mixed liquor after the reaction in the Fenton pool enters an alkali adjusting pool, and the pH value is adjusted to be alkaline;
(8) the wastewater after alkali adjustment enters a second sedimentation tank, and a precipitator is added for sedimentation to complete solid-liquid separation;
(9) the supernatant in the second sedimentation tank flows into a neutralization tank, and the pH value is adjusted to be neutral;
(10) the water in the neutralization tank enters a third reaction tank, an algaecide is added, and ammonia nitrogen and copper in the wastewater are removed by utilizing the absorption effect of the algaecide on nitrogen and copper;
(11) water in the third reaction tank enters a third sedimentation tank, and a precipitator is added for sedimentation to complete solid-liquid separation;
(12) enabling the supernatant in the third sedimentation tank to flow into a fourth reaction tank, adding floating plants, and further removing pollutants in the wastewater by utilizing the adsorption effect of the floating plants on the pollutants in the water;
(13) water in the fourth reaction tank enters an A/O tank, ammonia nitrogen is removed through nitrification and denitrification, and organic pollutants are degraded by using activated sludge;
(14) the water in the A/O pool enters a fourth sedimentation tank to complete solid-liquid separation;
(15) and the supernatant in the fourth sedimentation tank flows into a disinfection tank, enters a discharge tank after ultraviolet disinfection, and is finally discharged after reaching the standard.
5. The copper ammonia complex wastewater treatment process according to claim 4, characterized in that: the heavy metal trapping agent is trimercaptotriazine trisodium salt, the precipitating agent is one or a combination of polyaluminium chloride and polyvinyl amide, the algicide is chlorella vulgaris, and the floating plant is one or a combination of water hyacinth or pistia stratiotes.
6. The copper ammonia complex wastewater treatment process according to claim 5, characterized in that: the pH value of the acid adjusting pool is adjusted by hydrochloric acid, and the range of the pH value is 3-4.5.
7. The copper ammonia complex wastewater treatment process according to claim 5, characterized in that: and the pH value of the alkali adjusting tank is adjusted by sodium hydroxide and is within the range of 9.5-11.
8. The copper ammonia complex wastewater treatment process according to claim 5, characterized in that: the ratio of the trimercaptotriazine trisodium salt to the copper ions in the wastewater is n (trimercaptotriazine trisodium salt: copper) =1-3: 3.
9. The copper ammonia complex wastewater treatment process according to claim 5, characterized in that: the adding proportion of the Fenton reagent is n (H)2O2:COD）=1-3:1，n（H2O2：Fe2+）=3-6:1。
10. The copper ammonia complex wastewater treatment process according to claim 5, characterized in that: in the third reaction tank, the algaecide is 0.5-1g/m in dry weight3Adding; the fourth reactionIn the pond, the putting amount of the floating plants is 25-40 plants/m2。
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