CN102190408B - Technology for processing comprehensive waste water from acrylonitrile and acrylic fibers production - Google Patents
Technology for processing comprehensive waste water from acrylonitrile and acrylic fibers production Download PDFInfo
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- CN102190408B CN102190408B CN2011100964732A CN201110096473A CN102190408B CN 102190408 B CN102190408 B CN 102190408B CN 2011100964732 A CN2011100964732 A CN 2011100964732A CN 201110096473 A CN201110096473 A CN 201110096473A CN 102190408 B CN102190408 B CN 102190408B
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- preaeration
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- 239000002351 wastewater Substances 0.000 title claims abstract description 87
- 229920002972 Acrylic fiber Polymers 0.000 title claims abstract description 28
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 58
- 230000008569 process Effects 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000011282 treatment Methods 0.000 claims abstract description 24
- 230000020477 pH reduction Effects 0.000 claims abstract description 21
- 230000007062 hydrolysis Effects 0.000 claims abstract description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims description 34
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 238000007380 fibre production Methods 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 15
- 238000010992 reflux Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 11
- 238000006396 nitration reaction Methods 0.000 claims description 10
- 230000008021 deposition Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 7
- 230000035764 nutrition Effects 0.000 claims description 7
- 235000016709 nutrition Nutrition 0.000 claims description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 150000003016 phosphoric acids Chemical class 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005273 aeration Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 239000010815 organic waste Substances 0.000 abstract description 2
- 231100000419 toxicity Toxicity 0.000 abstract description 2
- 230000001988 toxicity Effects 0.000 abstract description 2
- 239000002894 chemical waste Substances 0.000 abstract 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- 229910021653 sulphate ion Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 metals ion Chemical class 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 229940061607 dibasic sodium phosphate Drugs 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 1
- 235000019797 dipotassium phosphate Nutrition 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229940045641 monobasic sodium phosphate Drugs 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Images
Abstract
The invention relates to a technology for processing comprehensive chemical waste water from acrylonitrile and acrylic fibers production and is directed to the field of environment engineering technology. According to the invention, an aeration reaction, a biology hydrolysis acidification, a denitrification nitrogen removal and an aerobic biological treatment are adopted. The waste water is classified into C, N and S grade. The toxicity problem for microbes caused by the waste water is solved; the biological treatment capability and waste water processing effect are improved. The technology is characterized by simple and reasonable process flow. The operation cost is reduced. The technology is suited for industrial application and biology processing of high sulfur high nitrogen organic waste water of the same kind.
Description
Technical field
The present invention relates to a kind of vinyl cyanide, acrylic fiber production process comprehensive effluent disposal technology, belong to field of environment engineering technology.Method of the present invention comprises biological treatments such as grid filtration, preaeration, acidication desulfurization, anaerobism decarburization and aerobic denitrogenation, is applicable to the biological treatment of similar waste water such as handling high-sulfur, high nitrogen and high COD.
Background technology
Acrylic fiber production process mainly contains Sodium Thiocyanate 99 single stage method, Sodium Thiocyanate 99 two step method, wet method and four kinds of production technique of dry method in China's prior art, but monomer whose is vinyl cyanide, obtains vinyl cyanide with propylene ammmoxidation process production usually.Solvent for use mainly contains Sodium Thiocyanate 99 (NaSCN), N (DMF), N,N-DIMETHYLACETAMIDE (DMAC), DMSO 99.8MIN. (DMSO), acetone, NSC 11801 (EC), nitric acid (HNO in the above-mentioned technology
3) and zinc chloride (ZnCl
2) etc.Wherein dry technology for production is to be main raw material with vinyl cyanide, methyl acrylate, SSS, and aqueous suspension polymerization is a solvent with the N, the dry-spinning process of hot nitrogen heating carrier.Wet processing then is to be that solvent is produced with the N,N-DIMETHYLACETAMIDE.No matter adopt the sort of explained hereafter acrylic fibers, its raw material always occurs in waste water, causes acrylic fiber production process trade effluent COD higher, about 1000～2000 mg/L.Usually also contain more oligoacrylonitrile (SS reaches 120～200 mg/L) in the acrylic fiber production process trade effluent, in addition SO
3 2-, SCN
-And CN
-Deng also existence in a large number.
The method that prior art is handled acrylic fibers industry waste water mainly contains: coagulation-deposition, coagulation-air supporting, suspension active sludge, A/O biomembrance process, biological filtering tower combined working, electrolytic process etc.
Chinese patent CN1385380 discloses the treatment process of a kind of vinyl cyanide, Nitrilon waste water; In bio-contact oxidation, add carbon black misfortune Powdered Activated Carbon and carry out pre-treatment; Filature wastewater is adopted the coagulation air-float pre-treatment earlier; Other factory effluents of remix adopt the A/O biological treatment, make waste water reach discharging standards.
Patent of invention CN200710176576.3 improves it, adopts homogeneous and deposition to remove suspended substance, adds the mikrobe toxicity of iron, magnesium, calcium plasma reduction waste water; But should technology still exist working cost high, shortcoming such as sludge yield is big, and contain a large amount of sulfate radicals in the waste water and be prone to form a throw out with the institute metals ion that adds; Form competition with materials such as the stronger cyanogen of bio-toxicity, nitrile, amine; Cause dosing bigger than normal, moreover these toxic substances do not remove from waste water; Therefore the toxic action to waste water does not thoroughly solve, and has increased cost for wastewater treatment and difficulty on the contrary.
Chinese patent CN99112488.X is coagulating sedimentation-anaerobic digestion-anaerobic-aerobic-sand filtration-activated carbon process; And Chinese CN00129461.X transform coagulating sedimentation-anaerobic-aerobic-charcoal tower process as air supporting-aeration-deposition-product acid-biological desulphurization-product methane-anaerobic-aerobic; These two patents are the technology based on biological treatment; But exist treatment scheme long, the actual motion difficulty, and often need the measure that replenishes to guarantee discharged wastewater met the national standard.
Chinese patent CN200810224878.8 adopts two membrane techniquies that Nitrilon waste water is handled, though can guarantee stable effluent quality, exists the film system to be prone to defectives such as pollution, cleaning interval weak point and investment running cost height, and the handling problem of unresolved dense water.
The magnetic resin dynamic adsorption is carried out in water outlet after the biochemical treatment that Chinese patent CN200810244778.1 proposes, and still changes technology and exists resin to lose efficacy and regeneration, and operation is difficult, cost is higher, and biologic treating technique is not proposed detailed method.
Chinese patent CN201010144936.3 provides a kind of electrocatalysis aerobic treatment process, has the higher deficiency of facility investment and working cost.
Chinese patent CN200910087863.6 provides a kind of double oxygen, aerobic and treatment process that coagulating sedimentation combines, and this technology is not effectively separated the bio-toxicity material yet or removed, and the coagulating sedimentation sludge output is bigger.
To sum up, the difficult point that acrylic fibers industry wastewater biological method is handled is: the polymkeric substance of difficult natural subsidence is prone to the parcel mikrobe after getting into biochemical system, influences biochemical effect; Make waste water be slightly acidic behind the sulphite aeration, influence anaerobic system and normally move; Simultaneously, organic amine and ammonia-nitrogen content are higher in the waste water, cause polluted by nitrogen.
Summary of the invention
In order to overcome the shortcoming of prior art; Technical purpose of the present invention is to provide a kind of vinyl cyanide, acrylic fiber production process comprehensive effluent disposal technology, makes that the present invention combines to produce reality, is the basis with the biologic treating technique; Adopt COMBINED PROCESS and operation conditions optimization; Technical process is reasonable, and running cost is low, is convenient to industrial applications.
In order to realize technical purpose of the present invention, technical program of the present invention lies in:
A kind of vinyl cyanide, acrylic fiber production process comprehensive effluent disposal technology is characterized in that may further comprise the steps:
(1) preaeration oxidation: vinyl cyanide, acrylic fiber production process comprehensive wastewater are at first got into the preaeration reaction tank, go into hydrolysis acidification reaction pond with the reaction of backflow acidizing fluid, returned sluge is laggard;
(2) acidication: the waste water after step (1) is handled gets into the hydrolysis acidification pool acidification that is hydrolyzed, and in hydrolysis acidification pool, adds phosphorous nutrition, with SO in the waste water
4 2-Be converted into H
2S, part acidified liquid are back in the preaeration reaction tank of step (1), and all the other waste water get into oxygen compatibility pool after acidication is handled;
(3) double oxygen denitrification: the waste water after step (2) is handled gets into oxygen compatibility pool and carries out the denitrification processing;
(4) aerobic nitrification: the waste water after step (3) is handled gets into nitrification tank and carries out the aerobic nitrification reaction; Wherein, One section Aerobic Pond that waste water is introduced in the nitrification tank carries out nitration treatment; The oxygen compatibility pool of one section aerobic nitrification liquid of part reflow step (3), two sections Aerobic Ponds that all the other one section aerobic nitrification liquid get into nitrification tank continue nitration treatment, finally remove COD and ammonia nitrogen in the waste water;
(5) deposition: the waste water that step (4) obtains gets into the second pond deposition, the supernatant that obtains discharging, and sludge part is back in the preaeration reaction tank of step (1), all the other mud dischargings.
Wherein, method of the present invention also comprises the pretreatment process of original waste water: it is subsequent use that vinyl cyanide, acrylic fiber production process comprehensive wastewater at first are placed on equalizing tank through grid filtration.
The waste water whole process temperature of method of the present invention is 20～38 ℃, and the pH value is 5～8.5.
The aeration intensity of the preaeration reaction tank of step of the present invention (1) (DO value) is 0.2～1.0 mg/L.
The phosphorous nutrition of step of the present invention (2) is a phosphoric acid salt.
The acidizing fluid reflux ratio of step of the present invention (2) is 50～300%, and the acidizing fluid hydraulic detention time is 1～5 h; Sludge concentration is 1～8g/L, mud hydraulic detention time 1～20h.
The DO value of the oxygen compatibility pool of step of the present invention (3) is less than 0.5 mg/L, and sludge concentration is 2～8 g/L.
The reflux ratio 100～300% of one section aerobic nitrification liquid of step of the present invention (4); Add the carrier organism filler in one section Aerobic Pond, dosage is and 10%～75% of one section Aerobic Pond volume ratio, and the DO value of one section Aerobic Pond is 1.5～5 mg/L, sludge concentration 2～8 g/L.
The DO value is 2～6 mg/L in two sections Aerobic Ponds of step of the present invention (4), sludge concentration 2～8 g/L.
The second pond return sludge ratio of step of the present invention (5) is 50～150%, surface load 0.5～2.0m
3/ m
2H.
Beneficial effect of the present invention is:
1, acrylic fiber production wastewater mainly by acrylonitrile installation spent process water and acrylic fibers device technique waste water composition, contains a large amount of SO in the waste water
3 2-, solvent, oligoacrylonitrile etc., waste water belongs to high-sulfur, high-nitrogen waste water.Because of SO
3 2-Too big to bio-toxicity, therefore, must remove waste water before getting into biological treatment system, and the simplest method is an aeration aerating, makes SO
3 2-Be converted into SO
4 2-SO
4 2-Under the effect of sulphate reducing bacteria, be converted into H
2S, too high H
2S concentration is toxic to sulphate reducing bacteria (SRB), and S
2-Under the high ORP condition of weakly alkaline, can be converted into SO
4 2-, so the sulfo-Cheng Zhongying of apologizing for having done sth. wrong in time removes H
2S.The present invention refluxes part acidified liquid, removes part sulphur through redox reaction.It is higher to contain difficult for biological degradation polymkeric substance and COD again in the waste water, and the waste water total nitrogen content is higher, so need utilize nitrification liquid to reflux, the oxygen technology of holding concurrently is set, and the waste water total nitrogen is reduced.After double oxygen is handled, two sections aerobic process are set, first section adds bio-carrier, improves activated sludge concentration, and waste water COD is effectively removed.Technology of the present invention is equally applicable to the biological treatment of other high-sulfurs, high nitrogen organic waste water.
2, the present invention effectively utilizes H
2The reductibility of S and SO
3 2-Reaction, the total sulfur clearance is high; In addition, utilize separating out of elemental sulfur, make part propylene nitrile oligopolymer obtain coagulant precipitation, solved the problem that adds of coagulated agent.
3, the present invention removes S, C, N classification, has improved the biological treatment performance, and water outlet COD and TN are lower.
4, the present invention is the basis with the biotechnology, and technical process is reasonable, and running cost is low, is convenient to industrial applications.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Wherein, each label is among the figure: 1-preaeration reaction tank; 2-acidication reaction tank; The 3-oxygen compatibility pool; One section Aerobic Pond of 4-; Two sections Aerobic Ponds of 5-; The 6-second pond; 7-waste water gets into; 8-acidication liquid refluxes; The 9-nitrification liquid refluxes; The 10-returned sluge; 11-discharges mud; The 12-waste discharge.
Embodiment
Embodiment 1
It is subsequent use that Nanjing area vinyl cyanide, acrylic fiber production process comprehensive wastewater at first are placed on equalizing tank through grid filtration.Through detecting, equalizing tank water outlet pH7.2, COD 6,100 mg/L wherein, total nitrogen 450 mg/L.
Vinyl cyanide, acrylic fiber production process comprehensive wastewater are at first got into the preaeration reaction tank, go into hydrolysis acidification reaction pond with the reaction of backflow acidizing fluid, returned sluge is laggard, aeration intensity (DO value) is 0.5 mg/L.
Waste water after preaeration is handled gets into the hydrolysis acidification pool acidification that is hydrolyzed, and in hydrolysis acidification pool, adds phosphorous nutrition (SODIUM PHOSPHATE, MONOBASIC), in mud naturally under the effect of the sulphate reducing bacteria of existence with SO in the waste water
4 2-Be converted into H
2S, part acidified liquid are back in the preaeration reaction tank, and all the other waste water get into oxygen compatibility pool after acidication is handled; Wherein the acidizing fluid reflux ratio is 300%, and the acidizing fluid hydraulic detention time is 1.5 h; Sludge concentration is 6 g/L, mud hydraulic detention time 20 h.
Waste water after acidication is handled gets into oxygen compatibility pool and carries out the denitrification processing; DO value 0.1 mg/L of oxygen compatibility pool wherein, sludge concentration is 5 g/L.
Waste water after denitrification is handled gets into nitrification tank and carries out the aerobic nitrification reaction; Wherein, one section Aerobic Pond that waste water is introduced in the nitrification tank carries out nitration treatment, and one section aerobic nitrification liquid of part passes back into oxygen compatibility pool, and two sections Aerobic Ponds that all the other one section aerobic nitrification liquid get into nitrification tank continue nitration treatment, finally remove COD and ammonia nitrogen in the waste water; The reflux ratio 300% of one section aerobic nitrification liquid; Add carrier organism filler (the P15 type modification compounded mix that Bo Ruide (Nanjing) purification techniques ltd produces) in one section Aerobic Pond, dosage is and 10% of one section Aerobic Pond volume ratio, and DO value 3 mg/L of one section Aerobic Pond, sludge concentration 8 g/L; The DO value is 4 mg/L in two sections Aerobic Ponds, sludge concentration 5 g/L.
The waste water that the aerobic nitrification reaction obtains gets into the second pond deposition, the supernatant that obtains discharging, and sludge part is back in the preaeration reaction tank, all the other mud dischargings.Wherein return sludge ratio is 50%, surface load 0.5m
3/ m
2H.
The waste water whole process temperature of present embodiment is 37 ℃, and the pH value is 5.
Discharge water is through detecting, and pH 7.5, COD 523 mg/L, total nitrogen 46 mg/L.
Embodiment 2
It is subsequent use that jiangsu wuxi area vinyl cyanide, acrylic fiber production process comprehensive wastewater at first are placed on equalizing tank through grid filtration.Through detection, equalizing tank water outlet pH6.8, wherein COD 5,890mg/L, total nitrogen 553mg/L.
Vinyl cyanide, acrylic fiber production process comprehensive wastewater are at first got into the preaeration reaction tank, go into hydrolysis acidification reaction pond with the reaction of backflow acidizing fluid, returned sluge is laggard, aeration intensity (DO value) is 1.0 mg/L.
Waste water after preaeration is handled gets into the hydrolysis acidification pool acidification that is hydrolyzed, and in hydrolysis acidification pool, adds phosphorous nutrition (Sodium phosphate, dibasic), in mud naturally under the effect of the sulphate reducing bacteria of existence with SO in the waste water
4 2-Be converted into H
2S, part acidified liquid are back in the preaeration reaction tank, and all the other waste water get into oxygen compatibility pool after acidication is handled; Wherein the acidizing fluid reflux ratio is 150%, and the acidizing fluid hydraulic detention time is 1 h; Sludge concentration is 8g/L, mud hydraulic detention time 1h.
Waste water after acidication is handled gets into oxygen compatibility pool and carries out the denitrification processing; DO value 0.4 mg/L of oxygen compatibility pool wherein, sludge concentration is 3 g/L.
Waste water after denitrification is handled gets into nitrification tank and carries out the aerobic nitrification reaction; Wherein, one section Aerobic Pond that waste water is introduced in the nitrification tank carries out nitration treatment, and one section aerobic nitrification liquid of part passes back into oxygen compatibility pool, and two sections Aerobic Ponds that all the other one section aerobic nitrification liquid get into nitrification tank continue nitration treatment, finally remove COD and ammonia nitrogen in the waste water; The reflux ratio 100% of one section aerobic nitrification liquid; Add carrier organism filler (the P15 type modification compounded mix that Bo Ruide (Nanjing) purification techniques ltd produces) in one section Aerobic Pond, dosage is and 55% of one section Aerobic Pond volume ratio, and DO value 2.5 mg/L of one section Aerobic Pond, sludge concentration 8 g/L; The DO value is 3.5 mg/L in two sections Aerobic Ponds, sludge concentration 5 g/L.
The waste water that the aerobic nitrification reaction obtains gets into the second pond deposition, the supernatant that obtains discharging, and sludge part is back in the preaeration reaction tank, all the other mud dischargings.Wherein return sludge ratio is 150%, surface load 0.8m
3/ m
2H.
The waste water whole process temperature of present embodiment is 38 ℃, and the pH value is 6.5.
Discharge water is through detecting, and pH 7.2, COD 475 mg/L, total nitrogen 38 mg/L.
Embodiment 3
It is subsequent use that Nanjing area vinyl cyanide, acrylic fiber production process comprehensive wastewater at first are placed on equalizing tank through grid filtration.Through detection, equalizing tank water outlet pH7.8, wherein COD 4,500mg/L, total nitrogen 380mg/L.
Vinyl cyanide, acrylic fiber production process comprehensive wastewater are at first got into the preaeration reaction tank, go into hydrolysis acidification reaction pond with the reaction of backflow acidizing fluid, returned sluge is laggard, aeration intensity (DO value) is 0.8 mg/L.
Waste water after preaeration is handled gets into the hydrolysis acidification pool acidification that is hydrolyzed, and in hydrolysis acidification pool, adds phosphorous nutrition (potassium hydrogenphosphate), in mud naturally under the effect of the sulphate reducing bacteria of existence with SO in the waste water
4 2-Be converted into H
2S, part acidified liquid are back in the preaeration reaction tank, and all the other waste water get into oxygen compatibility pool after acidication is handled; Wherein the acidizing fluid reflux ratio is 50%, and the acidizing fluid hydraulic detention time is 5 h; Sludge concentration is 5g/L, mud hydraulic detention time 10h.
Waste water after acidication is handled gets into oxygen compatibility pool and carries out the denitrification processing; DO value 0.2 mg/L of oxygen compatibility pool wherein, sludge concentration is 6 g/L.
Waste water after denitrification is handled gets into nitrification tank and carries out the aerobic nitrification reaction; Wherein, one section Aerobic Pond that waste water is introduced in the nitrification tank carries out nitration treatment, and one section aerobic nitrification liquid of part passes back into oxygen compatibility pool, and two sections Aerobic Ponds that all the other one section aerobic nitrification liquid get into nitrification tank continue nitration treatment, finally remove COD and ammonia nitrogen in the waste water; The reflux ratio 180% of one section aerobic nitrification liquid; Add carrier organism filler (the P15 type modification compounded mix that Bo Ruide (Nanjing) purification techniques ltd produces) in one section Aerobic Pond, dosage is and 75% of one section Aerobic Pond volume ratio, and DO value 4 mg/L of one section Aerobic Pond, sludge concentration 7 g/L; The DO value is 5 mg/L in two sections Aerobic Ponds, sludge concentration 5 g/L.
The waste water that the aerobic nitrification reaction obtains gets into the second pond deposition, the supernatant that obtains discharging, and sludge part is back in the preaeration reaction tank, all the other mud dischargings.Wherein return sludge ratio is 100%, surface load 1.3m
3/ m
2H.
The waste water whole process temperature of present embodiment is 20 ℃, and the pH value is 7.5.
Discharge water is through detecting, and pH 7.7, COD 638 mg/L, total nitrogen 56 mg/L.
Claims (4)
1. a vinyl cyanide, acrylic fiber production process comprehensive effluent disposal technology is characterized in that may further comprise the steps:
(1) preaeration oxidation: vinyl cyanide, acrylic fiber production process comprehensive wastewater are at first got into the preaeration reaction tank, go into hydrolysis acidification reaction pond with the reaction of backflow acidizing fluid, returned sluge is laggard; Wherein, the DO value of preaeration reaction tank is 0.2～1.0 mg/L;
(2) acidication: the waste water after step (1) is handled gets into the hydrolysis acidification pool acidification that is hydrolyzed, and in hydrolysis acidification pool, adds phosphorous nutrition, with SO in the waste water
4 2-Be converted into H
2S, part acidified liquid are back in the preaeration reaction tank of step (1), and all the other waste water get into oxygen compatibility pool after acidication is handled; Wherein, the acidizing fluid reflux ratio is 50～300%, and the acidizing fluid hydraulic detention time is 1～5 h; Sludge concentration is 1～8g/L, mud hydraulic detention time 1～20h;
(3) double oxygen denitrification: the waste water after step (2) is handled gets into oxygen compatibility pool and carries out the denitrification processing; Wherein, the DO value of oxygen compatibility pool is less than 0.5 mg/L, and sludge concentration is 2～8 g/L;
(4) aerobic nitrification: the waste water after step (3) is handled gets into nitrification tank and carries out the aerobic nitrification reaction; Wherein, One section Aerobic Pond that waste water is introduced in the nitrification tank carries out nitration treatment; The oxygen compatibility pool of one section aerobic nitrification liquid of part reflow step (3), two sections Aerobic Ponds that all the other one section aerobic nitrification liquid get into nitrification tank continue nitration treatment, finally remove COD and ammonia nitrogen in the waste water;
Wherein, the reflux ratio 100～300% of one section aerobic nitrification liquid; Add the carrier organism filler in one section Aerobic Pond, dosage is 10%～75% of one section Aerobic Pond volume, and the DO value of one section Aerobic Pond is 1.5～5 mg/L, sludge concentration 2～8 g/L;
The DO value is 2～6 mg/L in two sections Aerobic Ponds, sludge concentration 2～8 g/L;
(5) deposition: the waste water that step (4) obtains gets into the second pond deposition, the supernatant that obtains discharging, and sludge part is back in the preaeration reaction tank of step (1), all the other mud dischargings; Wherein, the second pond return sludge ratio is 50～150%, surface load 0.5～2.0m
3/ m
2H.
2. vinyl cyanide according to claim 1, acrylic fiber production process comprehensive effluent disposal technology is characterized in that also comprising the pretreatment process of original waste water: it is subsequent use that vinyl cyanide, acrylic fiber production process comprehensive wastewater at first are placed on equalizing tank through grid filtration.
3. vinyl cyanide according to claim 1, acrylic fiber production process comprehensive effluent disposal technology is characterized in that waste water whole process temperature is 20～38 ℃, and the pH value is 5～8.5.
4. vinyl cyanide according to claim 1, acrylic fiber production process comprehensive effluent disposal technology is characterized in that the phosphorous nutrition of described step (2) is a phosphoric acid salt.
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| CN102765857A (en) * | 2012-08-06 | 2012-11-07 | 上海电力学院 | Sewage treatment system and application thereof |
| CN103086576B (en) * | 2013-02-28 | 2013-12-04 | 北京凯易信环境科技有限公司 | Acrylonitrile/acrylon production comprehensive wastewater treatment technique |
| CN105271605B (en) * | 2014-07-11 | 2017-08-29 | 中国石油化工股份有限公司 | The processing method of acrylic nitrile waste water |
| CN106242193B (en) * | 2016-09-09 | 2019-03-29 | 河海大学 | A kind of processing unit and method of secondary effluent advanced nitrogen |
| CN110723862A (en) * | 2018-07-16 | 2020-01-24 | 中国石油化工股份有限公司 | Method for improving removal effect of ammonia nitrogen and total nitrogen in acrylonitrile sewage |
| CN110171879A (en) * | 2019-06-17 | 2019-08-27 | 南京大学 | A kind of fermentation waste water treatment process containing acrylonitrile |
| CN110498562B (en) * | 2019-08-08 | 2022-05-13 | 苏州苏净环保工程有限公司 | Treatment method of high-concentration stripping liquid wastewater |
| CN110451725A (en) * | 2019-08-14 | 2019-11-15 | 浙江巨能环境工程有限公司 | A kind of DMF and DMAC high-concentration waste water biological treatment system and processing method |
| CN110498569A (en) * | 2019-08-30 | 2019-11-26 | 四川达兴能源股份有限公司 | A kind of advanced treatment system and processing method of coking wastewater |
| CN113277679A (en) * | 2021-05-31 | 2021-08-20 | 南京汉志旗科技有限公司 | Nitrile-containing organic wastewater treatment process |
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| DE19859665A1 (en) * | 1998-12-23 | 2000-06-29 | Michael Winkler | Process to treat water effluent arising from fertilizer production dispenses with need for external carbon sources |
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