CN104591472A - Unsaturated polyester wastewater treatment method - Google Patents
Unsaturated polyester wastewater treatment method Download PDFInfo
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- CN104591472A CN104591472A CN201310529424.2A CN201310529424A CN104591472A CN 104591472 A CN104591472 A CN 104591472A CN 201310529424 A CN201310529424 A CN 201310529424A CN 104591472 A CN104591472 A CN 104591472A
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- unsaturated polyester
- waste water
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- 229920006305 unsaturated polyester Polymers 0.000 title claims abstract description 24
- 238000004065 wastewater treatment Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 65
- 239000002351 wastewater Substances 0.000 claims abstract description 44
- 238000011282 treatment Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000003647 oxidation Effects 0.000 claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 10
- 238000009835 boiling Methods 0.000 claims abstract description 8
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 15
- 239000010802 sludge Substances 0.000 claims description 13
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 7
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 7
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- 230000000050 nutritive effect Effects 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 238000006068 polycondensation reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 241001465754 Metazoa Species 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 210000003608 fece Anatomy 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 150000003016 phosphoric acids Chemical class 0.000 claims description 2
- 238000012163 sequencing technique Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000009834 vaporization Methods 0.000 claims 1
- 230000008016 vaporization Effects 0.000 claims 1
- 229920000728 polyester Polymers 0.000 description 13
- 239000012071 phase Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 240000008067 Cucumis sativus Species 0.000 description 1
- 235000010799 Cucumis sativus var sativus Nutrition 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- -1 alcohol acid anhydride Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000010533 azeotropic distillation Methods 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 150000007520 diprotic acids Chemical class 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910021654 trace metal Inorganic materials 0.000 description 1
- 239000002699 waste material 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
-
- 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
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
-
- 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
- C02F3/02—Aerobic processes
Abstract
The invention discloses an unsaturated polyester wastewater treatment method. The method comprises the following steps: evaporating unsaturated polyester wastewater, and concentrating and recovering material components with a high boiling point; adding material steam with a lower boiling point to an oxidation reactor, and oxidizing; and condensing the above obtained oxidized material, adding the condensed material to a biochemical reactor, and carrying out biochemical treatment. The method can thoroughly solve the pollution of unsaturated polyester wastewater, recovers most material components, and has the characteristics of great reduction of size of subsequent biochemical treatment facilities, land saving, economy, practicality and stable operation, and water obtained after the treatment can be stably discharged in a standard reaching manner.
Description
Technical field
The present invention relates to a kind of method processing unsaturated polyester waste water, particularly relate to the process of the polyester waste water that the polycondensation stage in a kind of unsaturated polyester resin (UPR) production process produces.
Background technology
Unsaturated polyester resin (UPR) by diprotic acid, dibasic alcohol, chemical polycondensation occurs and obtains, high density unsaturated polyester waste water is mainly at the generation water of alcohol acid anhydride in polycondensation, organic content, up to about 15 wt%, is mainly the intermediate product such as the reaction masses such as ethylene glycol, propylene glycol, glycol ether, phthalic anhydride, cis-butenedioic anhydride and some low molecule polyester monocases.
The method process polyester steam that early stage polyester enterprise many employings hot Media Oven burns, but not easily balance due to system pressure, there is serious safety problem, the method does not re-use.The cost of the method process polyester steam adopting hot Media Oven to burn is higher, and useful resources a large amount of in steam can not be recycled, and causes the huge wasting of resources.CN102285697A discloses a kind of technique of unsaturated polyester resin industry waste water reclaiming, adopts azeotropic distillation separation and recovery technology by the organism Resource recovery in waste water, and the waste water after azeotropy rectification column is separated enters biochemical system.Although the method decreases the concentration of wastewater through organic matter, reduce follow-up intractability, entrainer and wastewater volume are than being 1.5:1, and usage quantity is huge, does not have actual operability.In addition, the waste component after separation is single, and be mainly and produce several organic compound such as raw material used and by product, lack required nitrogen, phosphoric and the inorganic metal element of microorganism growth, Biochemical Treatment is bad.
Because Wastewater by Biochemical Treatment has, efficiency is high, cost is low, reduced investment, simple operation and other advantages, is the prefered method of Industrial Wastewater Treatment.But, and unsaturated polyester waste water that organic concentration very high single for specific examples of such components, biochemical process is adopted to carry out processing and only rely on mixing sanitary sewage to come supplementary nitrogen, phosphorus and inorganic salt be far from being enough, extra people is comprehensive not for adding medicament, and the working cost of wastewater treatment can be increased, uneconomical practicality.In addition, if biological treatment system long-term lacking Cucumber, sludge character will be caused to change, cause stickiness to expand, a series of operation problems such as shock-resistance is poor.
Summary of the invention
For the feature of the deficiencies in the prior art and unsaturated polyester waste water, the invention provides a kind of process and reuse method of unsaturated polyester waste water.The method thoroughly can solve the pollution of unsaturated polyester waste water, reclaims most of material component, greatly reduces the volume of subsequent biochemical treatment facility, saves occupation of land, has the features such as economical and practical and stable operation, process water outlet Absorbable organic halogens qualified discharge.
A kind of method processing unsaturated polyester waste water of the present invention, comprises following content: first evaporation process unsaturated polyester waste water, carries out concentration and recovery to high boiling material component; Lower boiling material steam enters oxidation reactor and carries out oxide treatment; Material after oxide treatment enters in biochemical reactor and carries out biochemical treatment after condensation.
In the inventive method, described unsaturated polyester waste water is from the polycondensation stage in unsaturated polyester resin production process, organic concentration is about 10 wt% ~ 20 wt%, is mainly the mixed solution of the intermediate product such as the reaction masses such as ethylene glycol, propylene glycol, glycol ether, phthalic anhydride, cis-butenedioic anhydride and some low molecule polyester monocases.
In the inventive method, described evaporation process adopts the evaporation mode of pump circulation, at 0.05 ~ 0.5 MPa pressure, at 90 ~ 120 DEG C of temperature, volatile pollutent in waste water is become gaseous state with water, and the organic materials of difficult volatilization is reclaimed further.According to the complexity that organic pollutants volatilizees relatively, regulate evaporite ratio to be 60% ~ 80%, liquid circulation is than 1:1 ~ 10:1, and the organic efficiency of involatile matter material component reaches 85% ~ 95%.
In the inventive method, described catalytic gas phase oxidation process is under the pressure residing for evaporation element, take air as oxidizing medium, and required air quantity is 100% ~ 120% of COD theoretical oxygen demand.In steam, volatile organic pollutant obtains suitable oxide treatment under 180 ~ 250 DEG C of temperature of reaction and gas-phase oxidation catalyst effect, reduces follow-up biochemical degradation difficulty.
In the inventive method, the good sequencing batch biofilm reactor SBBR of solid-liquid separation effect is selected in biochemical treatment.SBBR reactor of the present invention is provided with strengthening sludge drainage system, is regularly discharged by the suspended active mud of absorption large amount of organic, promotes biomembranous quick growth on filler.SBBR reactor takes up an area little, and its volumetric loading reaches 5 ~ 10 kgCOD/ (m
3d), aeration time is 10 ~ 20 h.Reactor built-in flow model suspension ball filler, packing ratio is 30% ~ 75%.Microorganic adhesion biofilm growth formation on filler in SBBR reactor, the microbial film that periodic exhaustion comes off and adsorbed a large amount of organic active sludge.
The inventive method, preferably supplements appropriate N, P nutritive element, as nitrate and phosphoric acid salt inorganics in biochemical treatment water inlet.The inventive method adds appropriate human and animal excreta and carrys out supplementary N, P nutritive element in biochemical treatment water inlet, and according to the densitometer of entering organic matter of water, the dosage of ight soil is 0.5 ~ 4 g/L waste water.Waste water after oxide treatment is conducive to human and animal excreta and resolves into material that is nitrogenous, phosphorous and trace metal, be used for supplementary nitrogen, phosphoric and other trace metals lacked, normal active and improve the efficiently and smoothly operated of biochemical system further to maintain microorganism.
Compared with the prior art, evaporation-catalytic gas phase oxidation-biochemical treatment that the inventive method provides process unsaturated polyester waste water that combines can reclaim the materials such as most of ethylene glycol, propylene glycol, phthalic acid, phthalic anhydride, cis-butenedioic anhydride, the waste water that after catalytic gas phase oxidation, condensation is formed can enter the Biochemical Treatment that municipal sewage plant's combination treatment, particularly gas phase oxidation process can significantly improve waste water.The method does not have huge biological treatment system, and floor space is little, is especially applicable to the small-sized polyester enterprise that water quality and quantity changes greatly, has good economic benefit and environmental benefit.
Accompanying drawing explanation
Fig. 1 is a kind of process flow diagram processing unsaturated polyester waste water of the present invention;
Wherein: 1, fresh feed pump, 2, heating tube, 3, recycle pump, 4, vaporizer, 5, preheating section, 6, gas-phase catalyst oxidation reactor, 7, condenser, 8, gas meter, 9, reducing valve, 10, air compressor machine, 11, SBBR reactor.
Fig. 2 is the concrete structure schematic diagram of a kind of high loading SBBR of the present invention reactor;
Wherein: 12, water-in, 13, sludge bucket, 14, mud discharging mouth, 15, aeration tube, 16, prosopyle, 17, shell, 18, filler, 19, overflow weir, 20, water outlet.
Embodiment
Fig. 1 is a kind of concrete technical process of the present invention: the unsaturated polyester waste water that polycondensation phase produces pumps into pump feed evaporator 4 by fresh feed pump 1 through preheater 2.Polyester waste water forms continuously liquid film from top to bottom on the tube wall of pump feed evaporator 4, in water, the organic boiling point such as diethylene glycol, ethylene glycol, propylene glycol, phthalic anhydride, cis-butenedioic anhydride is all high than the boiling point of water, liquid phase oily organism is formed in the bottom of pump feed evaporator 4, recycling after collecting; The intermediate products such as aldehydes a small amount of in water, phenols and low molecule ester class rise from continuous print liquid phase with water vapour, steam from vaporizer 4 tower top and mix uniformly rapidly with excessive air, reach the oxygen concentration (100% ~ 120% of COD theoretical oxygen demand) of regulation, required excessive air is provided through gas meter 8 by air compressor machine 10.Mixed steam enters in gas-phase catalyst oxidation reactor 6 after preheating section 5 heating reaches the temperature of reaction of 180 ~ 250 DEG C DEG C, at gas-phase oxidation catalyst, (catalyzer model is FY-C-4, take Vanadium Pentoxide in FLAKES as Primary Catalysts, one or more VIII B race active metals of load, its content is 0.01% ~ 10%.) and excess air effect under carry out low-temperature oxidation process, product through condenser 7 cool formed low-concentration organic waste water.The organism having a bio-toxicity due to major part in the gas phase oxygenolysis becomes small molecules hypotoxicity organism, waste water there is good biodegradability.After adjustment pH>6.5 supplements the nutritive elements such as suitable nitrogen, phosphorus, waste water enters SBBR reactor 11 and carries out aerobic treatment, the organism that the active sludge quick adsorption suspended is a large amount of, discharger subsequently, reaches the object reducing wastewater through organic matter fast.
Fig. 2 illustrates a kind of concrete structure schematic diagram of high loading SBBR reactor.This reactor is synthetic glass material, the wide * of its long * is high=and 200 mm*200 mm*320 mm, effective volume is 6.5L.Waste water, after pyrohydrolysis, has good biodegradability, is entered by SBBR reactor lower part water-in 12, after the active sludge of suspension growth carries out quick adsorption to it, by outside mud discharging mouth 14 discharger after being collected by the sludge bucket 13 of sludge drainage system immediately.The microbial film be attached on filler 18 is constantly bred, the oxidation operation in water is made to be decomposed into simple inorganics, when reaching certain thickness, owing to can not get enough oxygen in biological membranous layer, change anaerobic digestion into by aerobic decomposition, microorganism is aging gradually to come off from filler 18 surface.Waste water is from bottom to top by suspended sludge bed and filling batch, and microorganism carries out Adsorption and decomposition to the organism in water, and the water outlet after process is discharged by water outlet 20 through overflow weir 19.In aerobic system, there is competitive relation in the microbial film of apposition growth and the active sludge of suspension growth, therefore, quick discharge active sludge both can discharge the suspended sludge having adsorbed large amount of organic, be conducive to again biomembranous quick growth, thus reduce volume and the oxygen-consumption of structures, reduce working cost.
Further illustrate the inventive method and effect below by embodiment, wherein wt% is massfraction.
Embodiment 1
For certain small-sized unsaturated polyester enterprise domestic, the quantity discharged of polyester waste water is 30 m
3/ d, in polyester waste water, organic content is about 15 wt%, and wherein the content of dibasic alcohol is about 11.2 ~ 11.8 wt%, and the content of phthalic anhydride and cis-butenedioic anhydride is 2.5 ~ 2.7 wt%, and other light constituent organism are 0.3 ~ 1.2 wt%.
The method for the treatment of process evaporation-catalytic gas phase oxidation of the present invention is adopted to process, vaporizer adopts pump feed evaporator, steam enters in gas-phase catalyst oxidation reactor, with independently developed FY-C-4 for oxidation catalyst, loaded catalyst 1000 ml, air is as oxidizing medium, and air capacity is 110% of theoretical oxygen demand, and concrete operational condition and treatment effect are in table 1.
table 1 embodiment 1 main processing units and treatment effect
Embodiment 2
The waste water that the device process that employing embodiment 1 is identical is identical with embodiment 1, concrete operational condition and treatment effect are in table 2.
table 2 embodiment 2 main processing units and treatment effect
Embodiment 3
Adopt the polyester waste water that the identical disposal methods of embodiment 2 is identical, distinguish and before aerobic SBBR process, add ammonium chloride by COD:N:P=100:5:1 and potassium primary phosphate comes supplementary N, P element, processing water outlet COD is 125mg/L, BOD
5be 40 mg/L, ammonia nitrogen 12.1 mg/L, volatile phenol 0.5 mg/L.
Comparative example 1
Employing conventional treatment method evaporates---and the polyester waste water that SBBR process is identical with embodiment 1, process water outlet COD is 936mg/L, BOD
5be 300 mg/L, ammonia nitrogen 25.6 mg/L, volatile phenol 17 mg/L.
Adopt treatment process of the present invention, the most of organism in unsaturated polyester waste water can be made to be recycled utilization, process water outlet enters municipal sewage plant, this considerably reduces difficulty and the expense of subsequent disposal.Because the inventive method does not have huge biochemical treatment system, floor space is little, is especially applicable to the small-sized polyester enterprise that water quality and quantity changes greatly, has good economic benefit and environmental benefit.
Claims (13)
1. process a method for unsaturated polyester waste water, it is characterized in that comprising following content: first evaporation process unsaturated polyester waste water, concentration and recovery is carried out to high boiling material component; Lower boiling material steam enters oxidation reactor and carries out oxide treatment; Material after oxide treatment enters in biochemical reactor and carries out biochemical treatment after condensation.
2. method according to claim 1, is characterized in that: described unsaturated polyester waste water is from the polycondensation stage in unsaturated polyester resin production process, and in unsaturated polyester waste water, organic concentration is 10 wt% ~ 20 wt%.
3. method according to claim 2, is characterized in that: the unsaturated polyester Organic substance in water that gives up comprises ethylene glycol, propylene glycol, glycol ether, phthalic anhydride, cis-butenedioic anhydride.
4. method according to claim 1, is characterized in that: described evaporation process adopts the evaporation mode of pump circulation, and evaporating pressure is 0.05 ~ 0.5 MPa, and vaporization temperature is 90 ~ 120 DEG C.
5. the method according to claim 1 or 4, is characterized in that: evaporite ratio is 60% ~ 80%, and liquid circulation is than 1:1 ~ 10:1, and the organic efficiency of involatile matter material component is 85% ~ 95%.
6. method according to claim 1, is characterized in that: described catalytic gas phase oxidation process carries out under the pressure residing for evaporation element, take air as oxidizing medium, and required air quantity is 100% ~ 120% of COD theoretical oxygen demand.
7. the method according to claim 1 or 6, is characterized in that: oxidizing temperature is 180 ~ 250 DEG C.
8. method according to claim 1, is characterized in that: biochemical treatment adopts sequencing batch biofilm reactor (SBBR), and reactor is provided with strengthening sludge drainage system.
9. method according to claim 8, is characterized in that: SBBR reactor volume load is 5 ~ 10 kgCOD/ (m
3d), aeration time is 10 ~ 20 h.
10. the method according to claim 7 or 8, is characterized in that: reactor built-in flow model suspension ball filler, packing ratio is 30% ~ 75%.
11. methods according to claim 1, is characterized in that: supplement the material containing N, P nutritive element in biochemical treatment water inlet.
12. methods according to claim 11, is characterized in that: the material containing N, P nutritive element comprises nitrate and phosphoric acid salt inorganics.
13. methods according to claim 1 or 11, it is characterized in that: the material containing N, P nutritive element is human and animal excreta, according to the densitometer of entering organic matter of water, the dosage of ight soil is 0.5 ~ 4 g/L waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529424.2A CN104591472B (en) | 2013-11-01 | 2013-11-01 | A kind of method for handling unsaturated polyester (UP) waste water |
Applications Claiming Priority (1)
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