CN107285552A - A kind of processing method of PVC waste water - Google Patents
A kind of processing method of PVC waste water Download PDFInfo
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- CN107285552A CN107285552A CN201610219141.1A CN201610219141A CN107285552A CN 107285552 A CN107285552 A CN 107285552A CN 201610219141 A CN201610219141 A CN 201610219141A CN 107285552 A CN107285552 A CN 107285552A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 56
- 238000003672 processing method Methods 0.000 title claims abstract description 5
- 230000007062 hydrolysis Effects 0.000 claims abstract description 47
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 47
- 230000020477 pH reduction Effects 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000002525 ultrasonication Methods 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000012528 membrane Substances 0.000 claims description 19
- 238000009210 therapy by ultrasound Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 10
- 238000002604 ultrasonography Methods 0.000 claims 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract description 37
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 35
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 abstract 1
- 239000010842 industrial wastewater Substances 0.000 description 14
- 239000010802 sludge Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 6
- 208000028659 discharge Diseases 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000276457 Gadidae Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- 235000015097 nutrients Nutrition 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of polyvinyl chloride (PVC）The processing method of waste water, belongs to wastewater treatment field of Environment Protection.This method includes filtering, hydrolysis acidification, ultrasonication, BAF（Aeration and biological treating column）Several processes, wherein hydrolysis acidification and ultrasonication can be carried out respectively can also be while carry out.PVC waste water is handled using the group technology, COD clearances are up to more than 80%, and ammonia nitrogen removal frank connects 100%, and simple to operate, cost is low.
Description
Technical field
A kind of processing method method of PVC waste water, belongs to wastewater treatment field of Environment Protection.
Background technology
Polyvinyl chloride (PVC) is one of big general-purpose plastics in the world three, it is easily processed into the products such as section bar, tubing, sheet material, sheet material, with good anti-flammability, chemical resistance, electrical insulating property, and light weight, intensity are higher, cost is relatively low, thus be widely used in packing, build, the numerous areas such as industry and civil pipeline, cable cover(ing).Its production capacity also increases year by year, and world's PVC production capacities in 2005 are 34,070,000 tons/year, and yield is 3243.7 ten thousand tons；World's PVC production capacities increase by 4.5% in 2006, reaches 35,620,000 tons/year, yield slightly increases to 32,620,000 tons.By the end of 2006 end of the year China PVC aggregated capacity up to 1058.5 ten thousand tons/year.PVC production polymerization techniques are aqueous suspension polymerization technique.In production process, a large amount of technique waste waters can be produced, wherein predominantly centrifugal mother liquor waste water.Such waste water water is larger, the organic matter contained is less, but with certain toxicity and difficult for biological degradation, with the increasingly depleted of more strict and China's water resource of national environmental protection policy, its pollution problem and recycling problem are increasingly paid attention to by relevant enterprise.
At present, foreign countries are there is not yet the special processing to such waste water is reported.Domestic chlor-alkali enterprises are general to be handled after PVC waste water and other production waste water mixings, reach《Caustic soda, PVC industry pollution discharge standard（GB15581-95）》Discharge, or required according to this enterprise and local government after secondary discharge standard, integrated treatment reaches certain discharge standard heel row sea；Also the enterprise having even begins attempt to be used as process water due to itself local environment water scarcity using flushing water is used for after simple process, but mostly rests on experimental stage, really realizes industrialized seldom.
In the experimental study of country's processing PVC waste water, initially more using the methods of flocculation-oxidation, although its COD concentration can be reduced, but be due to there are problems that, it is impossible to reuse；The physico-chemical process grown up later, that is coagulation-Ozone, achieve preferable effect, but it is due to limited to COD removal ability, it is higher to add operating cost, could not also be promoted, along with each enterprise because production technology is different, the water quality for producing waste water is also different, therefore, and the treatment for reuse of PVC waste water is always to put an insoluble problem in face of chlor-alkali enterprises at home.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art there is provided a kind of simple and easy to apply, simple to operate, high treating effect, the low method of expense so that PVC waste water CODs, ammonia nitrogen are substantially reduced reaches discharging standards or even can realize waste water recycling.
The technical solution adopted for the present invention to solve the technical problems is：Using filtering, hydrolysis acidification, ultrasonication, BAF group technology process, the COD and ammonia nitrogen of PVC waste water is greatly reduced.
The filtering uses aperture for the filter membrane of 0.25 ~ 1.50 μm of filter membrane, preferably 0.45 μm.
The tangible hydrolysis acidification pool of hydrolysis acidification is with what is carried out, and the temperature of hydrolysis acidification is at 30 ~ 39 DEG C, and hydraulic detention time is 2 ~ 6h.36 DEG C of preferable temperature, hydraulic detention time is 4.5h.
Hydrolysis acidification pool uses seed sludge mode startup optimization, and dosage is 8-10g/L；Batch acclimation culture is carried out first after sludge seeding is completed, continuously run after introducing PVC waste water after 48 hours, during startup optimization, according to water analysis test case, nitrogen, phosphorus nutrients, and timing analysis detection Inlet and outlet water COD value change are supplemented, when hydrolysis acidification pool COD clearances reach 20% or so, assert that hydrolysis acidification pool culturing sludge is ripe, be at this moment stepped up hydraulic load and normally run.
Understood through analysis, contain a certain amount of PVC particles in PVC waste water, other compounds of side reaction generation, polymer etc. occur for these materials in the dispersant used in PVC polymerization processes such as polyvinyl alcohol, hydroxymethyl cellulose, the large amount of organic such as initiator and polymerization process.These impurity in PVC waste water, most of is macromolecule polyalcohol, its biochemical poor performance, it is directly poor using biological treatment effect, this hydrolysis acidification clearly demarcated just can first be about to these macromoleculars and be decomposed into small molecule, biodegradability is improved, is that follow-up BAF processing lays the first stone, treatment effect is improved.
The ultrasonication is supersonic generator Parallel to the flow direction and/or Transverse to the flow direction transmitting ultrasonic wave, and ultrasonication is implemented to the waste water in flowing.Supersonic generator sends ultrasonic frequency for 10-40kHz；Energy density is 5-50w/L, preferably 10-30w/L；Ultrasonic treatment time is 30-300S, preferably 50-300S.
After hydrolysis acidification processing, although the organic macromolecule of waste water is effectively degraded, but there is part fully to degrade, while also there are the suspensions such as partial sludge to enter water body.Certain frequency and the ultrasonic wave of intensity can produce the effect such as concussion, cavity in waste water, on the one hand the larger molecular organicses that can further degrade break its Long carbon chain, on the other hand cohesion and the precipitation of the suspensions such as sludge can be accelerated, the aggregation of partial organic substances one's share of expenses for a joint undertaking can also be promoted to be intercepted by sludge, therefore ultrasonication improves the effect of BAF processing after hydrolysis acidification terminates or while the biodegradability and suspension of waste water can be improved further.And Parallel to the flow direction and inverse water (flow) direction apply super simultaneously
The hydraulic detention time of the BAF is 0.5 ~ 4h, 25 ~ 40 DEG C of temperature.It is preferred that hydraulic detention time is 2.5h, 35 DEG C of temperature.
BAF（BAF）Seed sludge dosage is 3-5g/L.Activated sludge is first washed before adding, supernatant of draining.After the completion of activated sludge inoculation, BAF, which both entered, starts the biofilm stage, and for the ease of being rapidly completed this process, startup stage uses vexed exposure mode, carries out continuum micromeehanics after 24 hours again first.To mushroom out microorganism, according to C:N:P=100:5:1 ratio is properly added certain nutritional ingredient.Timing analysis detects BAF Inlet and outlet water COD value in running, when COD clearances reach more than 50% in measure water outlet, then illustrates that biological contact oxidation tower starts biofilm and completed, this process is needed 7 ~ 10 days.Then hydraulic load can be stepped up normally to be run.Through operation after a while, haydite surface meeting enriched suspended solid in BAF inside influences the mass transfer of organic matter, reduces the activity of microorganism, effluent quality can be influenceed by continuing to run with, therefore at this moment BAF must be backwashed.BAF backwash is divided into three steps：1. air purge, using device compressed air as source of the gas, air purge flow controls 80 ~ 100m3/ h, the air purge time is 5 minutes；Washed 2. gas and water is combined, while opening backwashing water, air valve, washing flow controls 5 ~ 6m3/ h, air purge flow controls 50 ~ 60m3/ h, gas and water combined the time of washing for 5 minutes；3. washing, closes air intake valve, washed, washing flow controls 7 ~ 9m3/ h, washing time is 5 minutes.Switch valve after the completion of washing, BAF enters normal operating condition.
Invention effect
PVC waste water is handled using technical solutions according to the invention, COD removal amount is more than 80%, and the clearance of ammonia nitrogen is close to 100%.Flow is simple, and processing cost is low, simple to operate to be easy to industrialization.
Embodiment
With reference to embodiment, the invention will be further described, but and is not so limited the present invention.
Embodiment 1
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.5 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 30 DEG C to control temperature in pond, and hydraulic detention time is 4h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, and Parallel to the flow direction launches the ultrasonic wave that ultrasonic intensity 10kHz, energy density are 50w/L, and ultrasonic treatment time is 300S；Water outlet enters 34 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2h.
Embodiment 2
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.5 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 30 DEG C to control temperature in pond, and hydraulic detention time is 2h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Transverse to the flow direction, and it is the ultrasonic wave that 20kHz, energy density are 15w/L to launch Transverse to the flow direction, frequency, and ultrasonic treatment time is 100S；Water outlet enters 34 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2h.
Embodiment 3
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.5 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 39 DEG C to control temperature in pond, and hydraulic detention time is 4h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and supersonic generator of the processor for ultrasonic wave equipped with Parallel to the flow direction and Transverse to the flow direction launches ultrasonic frequency 40kHz, energy density for 10w/L, ultrasonic treatment time is 150S；Water outlet enters 25 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2h.
Embodiment 4
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.5 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 36 DEG C to control temperature in pond, and hydraulic detention time is 6h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, and it is that 25kHz, energy density are 35w/L to launch ultrasonic frequency, and ultrasonic treatment time is 200S；Water outlet enters 30 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2h.
Embodiment 5
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.8 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 33 DEG C to control temperature in pond, and hydraulic detention time is 5h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, and it is that 35kHz, energy density are 40w/L to launch ultrasonic frequency, and ultrasonic treatment time is 120S；Water outlet enters 40 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 4h.
Embodiment 6
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.65 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 32 DEG C to control temperature in pond, and hydraulic detention time is 3h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, and it is that 25Hz, energy density are 30w/L to launch ultrasonic frequency, and ultrasonic treatment time is 250S；Water outlet enters 29 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 3h.
Embodiment 7
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.6 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 30 DEG C to control temperature in pond, and hydraulic detention time is 3h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, launches ultrasonic wave 25kHz, energy density for 30w/L, ultrasonic treatment time is 100S；Water outlet enters 33 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 3h.
Embodiment 8
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 36 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, launches ultrasonic wave 30kHz, energy density for 25w/L, ultrasonic treatment time is 100S；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2.5h.
Embodiment 8
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 36 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, supersonic generator of the processor for ultrasonic wave equipped with Parallel to the flow direction and Transverse to the flow direction, and it is that 25kHz, energy density are 30w/L to launch ultrasonic frequency, and ultrasonic treatment time is 150S；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2.5h.
Embodiment 9
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 36 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；There is the supersonic generator of Parallel to the flow direction and Transverse to the flow direction on hydrolysis acidification pool, it is that 25kHz, energy density are 30w/L to launch ultrasonic frequency, and ultrasonic treatment time is 150S, the progress simultaneously in same structures of ultrasonically treated and hydrolysis acidification；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after processing, and hydraulic detention time is 2.5h.
Comparative example 1
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 36 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after hydrolysis acidification, and hydraulic detention time is 2.5h.
Comparative example 2
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water enters processor for ultrasonic wave after filtering, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, launches ultrasonic wave 30kHz, energy density for 25w/L, ultrasonic treatment time is 100S；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2.5h.
Comparative example 3
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 25 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, launches ultrasonic wave 30kHz, energy density for 25w/L, ultrasonic treatment time is 100S；Water outlet enters 35 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2.5h.
Comparative example 4
PVC industrial wastewaters are taken, COD is 348.5 mg/L, and ammonia nitrogen is 6.7 mg/L.The filter membrane that waste water first passes around a diameter of 0.45 μm of filter opening is filtered；Waste water is handled into hydrolysis acidification pool after filtering, and it is 25 DEG C to control temperature in pond, and hydraulic detention time is 4.5h；Water outlet enters processor for ultrasonic wave after hydrolysis acidification, and processor for ultrasonic wave is equipped with the supersonic generator of Parallel to the flow direction, launches ultrasonic wave 30kHz, energy density for 25w/L, ultrasonic treatment time is 100S；Water outlet enters 42 DEG C of temperature in BAF towers, control tower after ultrasonication, and hydraulic detention time is 2.5h.
Each embodiment result of table 1
| Embodiment sequence number | PVC waste water CODs（mg/L) | PVC ammonia nitrogen in waste water（mg/L) | COD after processing（mg/L) | Ammonia nitrogen after processing（mg/L) | COD clearances（%） | Ammonia nitrogen removal frank（%） |
| Embodiment 1 | 348.5 | 6.7 | 64.4 | It can't check | 81.5 | 100 |
| Embodiment 2 | 348.5 | 6.7 | 50.5 | It can't check | 85.5 | 100 |
| Embodiment 3 | 348.5 | 6.7 | 58.5 | It can't check | 83.2 | 100 |
| Embodiment 4 | 348.5 | 6.7 | 47.4 | It can't check | 86.4 | 100 |
| Embodiment 5 | 348.5 | 6.7 | 52.9 | It can't check | 84.8 | 100 |
| Embodiment 6 | 348.5 | 6.7 | 39.4 | It can't check | 88.7 | 100 |
| Embodiment 7 | 348.5 | 6.7 | 59.6 | It can't check | 82.9 | 100 |
| Embodiment 8 | 348.5 | 6.7 | 33.1 | It can't check | 90.5 | 100 |
| Embodiment 9 | 348.5 | 6.7 | 31.4 | It can't check | 91.0 | 100 |
| Comparative example 1 | 348.5 | 6.7 | 108.4 | 1.1 | 68.8 | 83.6 |
| Comparative example 2 | 348.5 | 6.7 | 100.4 | 1.8 | 71.2 | 73.1 |
| Comparative example 3 | 348.5 | 6.7 | 127.6 | 2.1 | 63.4 | 68.7 |
| Comparative example 4 | 348.5 | 6.7 | 111.9 | 2.4 | 67.9 | 64.2 |
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, any those skilled in the art are changed or are modified as the equivalent embodiment of equivalent variations possibly also with the technology contents of the disclosure above.But every without departing from technical solution of the present invention content, any simple modification, equivalent variations and remodeling that the technical spirit according to the present invention is made to above example, still fall within the protection domain of technical solution of the present invention.
Claims (9)
1. a kind of PVC waste water processing method, it is characterized in that：This method is made up of filtering, hydrolysis acidification, ultrasonication and the several steps of BAF.
2. according to the method described in claim 1, it is characterized in that：Two steps of the hydrolysis acidification and ultrasonication are carried out simultaneously in same structures.
3. method according to claim 1 or claim 2, it is characterized in that：The filtering uses filter sizes to be filtered for 0.25 ~ 1.50 μm of filter membrane.
4. method according to claim 3, it is characterized in that：Described hydrolysis acidification temperature is 30 ~ 39 DEG C, and hydraulic detention time is 2 ~ 6h.
5. method according to claim 3, it is characterized in that：The BAF hydraulic detention times are 0.5 ~ 4h, 25 ~ 40 DEG C of temperature.
6. method according to claim 3, it is characterized in that：The generating means of the ultrasound process is arranged on Parallel to the flow direction or/and Transverse to the flow direction, launches Parallel to the flow direction or/and Transverse to the flow direction ultrasonic wave.
7. method according to claim 6, it is characterized in that：The ultrasonic frequency that the ultrasonic generator occurs is 10 ~ 40kHz；Energy density is 10 ~ 50w/L；Ultrasonic treatment time is 50 ~ 300S.
8. method according to claim 6, it is characterized in that the filter process uses aperture for 0.45 μm of filter membrane, the temperature of the hydrolysis acidification is 36 DEG C, hydraulic detention time is 4.5h, the ultrasonic frequency is that 25kHz, energy density are that 30w/L, ultrasonic treatment time are 150S, and the temperature of the BAF is 35 DEG C, hydraulic detention time is 2.
5 h。
9. method according to claim 6, it is characterized in that：The filter process uses aperture for 0.45 μm of filter membrane；The temperature of the hydrolysis acidification is 36 DEG C, hydraulic detention time is 4.5h；The supersonic generator is on the hydrolysis acidification pool, Parallel to the flow direction and Transverse to the flow direction launch ultrasonic wave, ultrasonic frequency be 25kHz, energy density be 30w/L, processing time be 150S；Ultrasonically treated and hydrolysis acidification is carried out simultaneously in same structures, ultrasonication and hydrolysis acidification；It is 2.5h that water outlet, which enters 35 DEG C of temperature, hydraulic detention time in BAF towers, control tower,.
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