CN109133533A - A kind of high concentration liquid crystal waste water integral treatment method - Google Patents
A kind of high concentration liquid crystal waste water integral treatment method Download PDFInfo
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- CN109133533A CN109133533A CN201811186883.4A CN201811186883A CN109133533A CN 109133533 A CN109133533 A CN 109133533A CN 201811186883 A CN201811186883 A CN 201811186883A CN 109133533 A CN109133533 A CN 109133533A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 46
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000010802 sludge Substances 0.000 claims abstract description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000006228 supernatant Substances 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 10
- 230000001699 photocatalysis Effects 0.000 claims abstract description 8
- 238000007146 photocatalysis Methods 0.000 claims abstract description 7
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims abstract description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 33
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 230000003750 conditioning effect Effects 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 10
- 229940068984 polyvinyl alcohol Drugs 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- 239000012028 Fenton's reagent Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- 239000008399 tap water Substances 0.000 claims description 6
- 235000020679 tap water Nutrition 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 244000060011 Cocos nucifera Species 0.000 claims description 3
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 230000036961 partial effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000012824 chemical production Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000120 microwave digestion Methods 0.000 description 14
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- RMCIOPRDYJLIQM-XMTFNYHQSA-N (2r,3r,4s,5r)-1,2,3,4,5-pentahydroxyoctadecan-6-one Chemical compound CCCCCCCCCCCCC(=O)[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO RMCIOPRDYJLIQM-XMTFNYHQSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- -1 dodecyl glucose glucosides Chemical class 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 229930182470 glycoside Natural products 0.000 description 1
- 150000002338 glycosides Chemical class 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- 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
- C02F2305/10—Photocatalysts
-
- 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
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
Abstract
The invention belongs to chemical production wastewater processing technology fields, it is related to a kind of high concentration liquid crystal waste water integral treatment method, water outlet enters Fenton reactor and reacts after first high concentration liquid crystal waste water is adjusted, it takes supernatant to enter sbr reactor device aeration reaction for static after the solution adjusting pH value after reaction to 7 again, supernatant is discharged into TiO after natural subsidence2In/active carbon photo catalysis reactor, ultraviolet source is connected, starts light-catalyzed reaction, a small amount of sludge that the iron cement and sbr reactor device that Fenton reactor generates generate enters dry resolution in Hyperfrequency waves eliminating stove, realizes concentration liquid crystal waste water integrated treatment；Its simple process is novel, easy to operate, at low cost, less energy consumption, and operational safety is stablized, and COD removal efficiency is high, and iron cement recycling treatment effect is good.
Description
Technical field:
The invention belongs to chemical production wastewater processing technology fields, are related to a kind of high concentration liquid crystal waste water integrated treatment side
Method is based on Fenton pretreatment-SBR-TiO2/ active carbon photochemical catalytic oxidation-micro-wave digestion sludge a new combined process is handled
The sludge generated in high concentration liquid crystal waste water and treatment process.
Background technique:
With the fast development of information industry and electronics industry, liquid crystal display be applied to more and more widely TV,
The fields such as mobile phone, instrument.Monomer liquid crystal is produced using chemical synthesis process, the Organic Pollutants in Wastewater concentration of generation
Height, complicated component, toxicity are big, and are difficult to be degraded by microorganisms, and the major pollutants in liquid crystal waste water have dodecyl glucose sugared
Glycosides (95%), alkene, surfactant (dibutyl phthalate), plasticizer (perfluoro caprylic acid) and ethyl alcohol, wherein surface is living
Property agent and plasticizer be strong carcinogen, have strong inhibiting effect and toxic action to biology, and metabolism is slow in vivo, deposit
Stay the time long, the below standard discharge of high concentration liquid crystal waste water can damage water environment, soil environment and ecological environment.It is domestic
Seven big water systems in detect surfactant and plasticizer to some extent, especially fearful is also examined in blood of human body
This pollutant has been measured, or even has had also discovered this pollutant in newborn blood.
Currently, the method for processing high concentration liquid crystal wastewater from chemical industry is Fenton oxidation group technology, such as: Fenton pretreatment
+ hydrolysis acidification+aerobic+ultra filtering reverse osmosis group technology, Fenton pretreatment+hydrolysis acidification+ozone oxidation+aerobic+micro-filtration+disappear
Poison, Fenton oxidation+anaerobism+ultrafiltration, Fenton oxidation+ultrafiltration+reverse osmosis+desalination etc., it is highly concentrated being handled using the above method
When spending liquid crystal wastewater from chemical industry, the safe disposal to sludge is ignored.Existing method is highly concentrated using Fenton oxidation pretreatment
When spending liquid crystal wastewater from chemical industry, generating a large amount of iron cements, (main component is Fe (OH)3Precipitating), iron cement belongs to danger wastes, row
Putting untreated iron cement can cause environmental pollution.Therefore, a kind of Fenton-SBR-TiO is designed2/ active carbon-micro-wave digestion
A new combined process is disposed while realizing high concentration liquid crystal waste water and sludge.
Summary of the invention:
It is an object of the invention to overcome disadvantage of the existing technology, a kind of green, energy saving, efficient Fenton is designed
Pretreatment-SBR-TiO2/ active carbon photochemical catalytic oxidation-micro-wave digestion sludge novel high density liquid crystal waste water integrated treatment side
The processing parameter of each workshop section is studied and optimized to method, provides technical support for the thorough processing of high concentration liquid crystal waste water.
To achieve the goals above, the present invention handles the detailed process of high concentration liquid crystal waste water are as follows:
(1) in conditioning tank, with concentration be 31% HCl and tap water carries out pH to high concentration liquid crystal waste water and COD is dense
The adjustment of degree, effluent COD concentration control is in 150000mg/L hereinafter, pH is about 3 after adjustment；
(2) conditioning tank water outlet enters Fenton reactor and is reacted, and the reaction time is 30~60min, after reaction,
Solution after reaction is introduced into pH conditioning tank and adjusts pH value to 7 or so, supernatant enters sbr reactor device after static 2~3h；Into
The supernatant of sbr reactor device and the ratio of activated sludge are 1:3~1:1, stop aeration after 18~22h of aeration reaction, then natural
2-3h is settled, supernatant is discharged into TiO2In/active carbon photo catalysis reactor, ultraviolet source is connected, starts light-catalyzed reaction,
Hydraulic detention time is 2~3h, and the COD concentration of liquid crystal waste water is reduced to 42mg/L by 150000mg/L, wherein TiO2/ active carbon is used
Amount is 5~10g/L；
(3) a small amount of sludge that the iron cement and sbr reactor device that Fenton reactor generates generate, which enters in Hyperfrequency waves eliminating stove, to be done
Dry resolution, microwave irradiation power are 300~400W, and microwave irradiation time is 20~40min, realize the integration of concentration liquid crystal waste water
Processing.
Fenton reactor of the present invention is attached to Fenton reagent dosing pump, Fe in Fenton reagent2+: H2O2Quality is dense
Degree is than being 1:3~1:7, Fe2+Concentration be 40~80mg/L.
Activated sludge of the present invention is the activated sludge for being derived from certain sewage treatment plant aeration tank, into sbr reactor device
Sludge concentration is 3500~4500mg/L, and sludge settling ratio is 40~50.
TiO of the present invention2/ activated-carbon catalyst is laboratory self-control, and specific preparation process flow is as follows:
1. using mass fraction for the NaOH of 5~10% HCl and 5~10% is successively 0.2~0.5mm to commercially partial size
Cocoanut active charcoal carry out 1~2h of surface preparation, then pull active carbon out and clean 3~5 times with tap water, will finally clean
Clean active carbon particle, which is transferred in micro-wave oven, to be activated and is dried at 200~300W of power；
2. the method dissolved by heating is used to prepare mass fraction for 1~2% 1~2L of poly-vinyl alcohol solution, then by 5g
TiO2Powder ultrasonic is dispersed in the poly-vinyl alcohol solution that mass fraction is 1~2%, and ultrasonic time is 30~60min, is obtained
TiO2Polyvinyl alcohol solution；
3. by step 1. treated active carbon puts into 2. TiO that step prepared2Continue in polyvinyl alcohol solution
Then 30~60min of ultrasound drains taking-up active carbon, dries, be sealed spare in the baking oven of 80~100 DEG C of merging；Wherein
TiO2Select commercially P25TiO2。
The sludge that the present invention generates in Fenton reactor is after micro-wave digestion, and sludge weight reduction arrives after dry resolution
Originally 1/4, main component is Fe (OH)3Precipitating can realize the contracting of danger wastes iron cement as the raw material of other industry
Quantization, the disposition of innoxious and volume reductionization.
The operation principle of the present invention is that: major pollutants dodecyl glucose glucosides and surfactant in liquid crystal waste water
Easily by Fenton reagent oxidative degradation at small molecular organic acid, small molecular organic acid is through SBR technique by aerobic biodegradation at CO2
And H2O, the microorganisms such as bacterium in remaining contaminant trace species and water body pass through TiO2/ active carbon light-catalyzed reaction removal, water outlet
Water quality meets sewage discharge level-one A standard, can meet garden production or life uses, realize the recycling of water resource；And
A small amount of sludge that the iron cement and SBR technique that Fenton reaction generates generate obtains the high byproduct of iron-content directly through micro-wave digestion,
Realize contracting quantization, the innoxious and recycling that danger wastes are disposed.
Compared with prior art, the present invention its simple process is novel, easy to operate, at low cost, less energy consumption, operational safety is steady
Fixed, COD removal efficiency is high, and iron cement recycling treatment effect is good.
Detailed description of the invention:
Fig. 1 is Fenton-SBR-TiO of the embodiment of the present invention2/ active carbon-micro-wave digestion sludge a new combined process processing
The Technology Roadmap of high concentration liquid crystal waste water.
Fig. 2 is high concentration of embodiment of the present invention liquid crystal waste water through Fenton-SBR-TiO2/ activated carbon combined each workshop section of technique
To the removal situation of COD.
Fig. 3 is weight change situation of the sludge (predominantly iron cement) of generation of the embodiment of the present invention after micro-wave digestion.
Specific embodiment:
The invention will be further described by way of example and in conjunction with the accompanying drawings.
The detailed process of the present embodiment processing high concentration liquid crystal waste water are as follows:
(2) in conditioning tank, with concentration be 31% HCl and tap water carries out pH to high concentration liquid crystal waste water and COD is dense
The adjustment of degree, effluent COD concentration control is in 150000mg/L hereinafter, pH is about 3 after adjustment；
(2) conditioning tank water outlet enter Fenton reactor (Fenton reactor in Fig. 1) reacted, the reaction time be 30~
Solution after reaction is introduced pH conditioning tank and adjusts pH value to 7 or so by 60min after reaction, supernatant after static 2~3h
Into sbr reactor device；The ratio of supernatant and activated sludge into sbr reactor device is 1:3~1:1,18~22h of aeration reaction
Stop aeration, then natural subsidence 2-3h afterwards, supernatant is discharged into TiO2In/active carbon photo catalysis reactor, ultraviolet light is connected
Source starts light-catalyzed reaction, and hydraulic detention time is 2~3h, and the COD concentration of liquid crystal waste water is reduced to 42mg/ by 150000mg/L
L, wherein TiO2/ activated carbon dosage is 5~10g/L；
(3) a small amount of sludge that the iron cement and sbr reactor device that Fenton reactor generates generate, which enters in Hyperfrequency waves eliminating stove, to be done
Dry resolution, microwave irradiation power are 300~400W, and microwave irradiation time is 20~40min, realize the integration of concentration liquid crystal waste water
Processing.
Fenton reactor described in the present embodiment is attached to Fenton reagent dosing pump, Fe in Fenton reagent2+: H2O2Quality
Concentration ratio is 1:3~1:7, Fe2+Concentration be 40~80mg/L.
Activated sludge described in the present embodiment is the activated sludge for being derived from certain sewage treatment plant aeration tank, into sbr reactor device
Sludge concentration be 3500~4500mg/L, sludge settling ratio be 40~50.
TiO described in the present embodiment2/ activated-carbon catalyst is laboratory self-control, and specific preparation process flow is as follows:
1. using mass fraction for the NaOH of 5~10% HCl and 5~10% is successively 0.2~0.5mm to commercially partial size
Cocoanut active charcoal carry out 1~2h of surface preparation, then pull active carbon out and clean 3~5 times with tap water, will finally clean
Clean active carbon particle, which is transferred in micro-wave oven, to be activated and is dried at 200~300W of power；
2. the method dissolved by heating is used to prepare mass fraction for 1~2% 1~2L of poly-vinyl alcohol solution, then by 5g
TiO2Powder ultrasonic is dispersed in the poly-vinyl alcohol solution that mass fraction is 1~2%, and ultrasonic time is 30~60min, is obtained
TiO2Polyvinyl alcohol solution；
3. by step 1. treated active carbon puts into 2. TiO that step prepared2Continue in polyvinyl alcohol solution
Then 30~60min of ultrasound drains taking-up active carbon, dries, be sealed spare in the baking oven of 80~100 DEG C of merging；Wherein
TiO2Select commercially P25TiO2。
This example uses Fenton-SBR-TiO2/ active carbon-micro-wave digestion sludge a new combined process handles high concentration liquid
Brilliant waste water, first research Fenton, SBR and TiO2Removal feelings of three workshop sections of/active carbon photocatalytic degradation to liquid crystal waste water COD
Then condition investigates micro-wave digestion technique to the iron cement disposal of resources situation of generation.
Embodiment 1:Fenton-SBR-TiO2/ active carbon-micro-wave digestion sludge a new combined process handles high concentration liquid crystal
Waste water
The present embodiment chooses the liquid crystal waste water of certain chemical plant generation, COD at concentrations up to 300000mg/L, pH value is 5~
6, for the safety and high efficiency for improving Fenton reaction, liquid crystal waste water is first carried out through conditioning tank before entering Fenton reactor
Water quality adjustment, making the waste water COD concentration into Fenton reactor, pH is 3 or so in 150000mg/L；Waste water is anti-in Fenton
It answers and stops reacting and separating supernatant and iron cement after aoxidizing about 30~60min in device, iron cement resource utilization after micro-wave digestion,
Enter sbr reactor device after supernatant water outlet is pH adjusted, 20h or so is reacted in sbr reactor device and stops reaction, at static one section
Between after supernatant enter TiO2/ active carbon photo catalysis reactor carries out the remaining pollutant of photocatalytic oxidation degradation and sterilization simultaneously
Disinfection treatment, hydraulic detention time about 2h, water outlet can be in garden or workshop reuse.
Embodiment 2: the removal situation of COD in high concentration liquid crystal waste water
The present embodiment embodiment 1 high concentration liquid crystal waste water through Fenton-SBR-TiO2Work is combined in the photocatalysis of/active carbon
After skill, each workshop section is to the removal situation of COD as shown in Fig. 2, it can be seen from the figure that liquid crystal waste water is located in advance by Fenton oxidation
After managing 60min, COD concentration is reduced to 2800mg/L from 150000mg/L, and stage COD removal rate is up to 98%；Next
Fenton water outlet enters SBR cell processing 20h, COD concentration and is reduced to 512mg/L from 2800mg/L, and stage COD removal rate is about
82%；Last SBR water outlet enters TiO2/ active carbon photo catalysis reactor reacts 2h, and COD concentration is reduced to 42mg/L from 512mg/L,
COD water quality index is lower than the level-one A standard (COD 50mg/L) of national sewage discharge, meanwhile, the ultraviolet light and light in the stage are urged
Change reaction and plays the role of effective sterilizing to the harmful bacteria in water.
Embodiment 3: weight change situation of the sludge (predominantly iron cement) of generation after microwave drying
The present embodiment by embodiment 1Fenton pre-process and two workshop section of SBR generate sludge condensation after enter micro-wave oven into
Row drying, the weight of sludge is with the variation tendency of microwave digestion time as shown in figure 3, it can be seen from this figure that in preceding 20min
Interior, sludge weight sharply declines with the increase of microwave digestion time；Between 20~30min, when sludge weight is with micro-wave digestion
Between extension and tend to be steady, sludge weight is basically unchanged after 30min, this illustrates that sludge is dried thoroughly, and sludge is by original
100g becomes 24g；During microwave drying, moisture and a part of sludge are volatilized sludge in the form of vapor and ash content
Fall, remaining ingredient is mainly Fe (OH)3, while the bacterium in sludge can be sterilized by microwave disinfection, realize the contracting amount in sludge
Change, recycling and harmless treatment.
Claims (4)
1. a kind of high concentration liquid crystal waste water integral treatment method, it is characterised in that detailed process are as follows:
(1) HCl and tap water for being 31% with concentration in conditioning tank carry out the tune of pH and COD concentration to high concentration liquid crystal waste water
Whole, effluent COD concentration control is in 150000mg/L hereinafter, pH is 3 after adjustment；
(2) conditioning tank water outlet enters Fenton reactor and is reacted, and the reaction time is that 30~60min after reaction will be anti-
Solution after answering introduces pH conditioning tank and adjusts pH value to 7, and supernatant enters sbr reactor device after static 2~3h；Into sbr reactor
The supernatant of device and the ratio of activated sludge are 1:3~1:1, stop aeration, then natural subsidence 2- after 18~22h of aeration reaction
Supernatant is discharged into TiO by 3h2In/active carbon photo catalysis reactor, ultraviolet source is connected, starts light-catalyzed reaction, waterpower is stopped
Staying the time is 2~3h, and the COD concentration of liquid crystal waste water is reduced to 42mg/L by 150000mg/L, wherein TiO2/ activated carbon dosage is 5
~10g/L；
(3) a small amount of sludge that the iron cement and sbr reactor device that Fenton reactor generates generate enters drying in Hyperfrequency waves eliminating stove and disappears
Solution, microwave irradiation power are 300~400W, and microwave irradiation time is 20~40min, are realized at the waste water integration of concentration liquid crystal
Reason.
2. concentration liquid crystal waste water integral treatment method according to claim 1, it is characterised in that the Fenton reactor
It is attached to Fenton reagent dosing pump, Fe in Fenton reagent2+: H2O2Mass concentration ratio is 1:3~1:7, Fe2+Concentration be 40~
80mg/L。
3. concentration liquid crystal waste water integral treatment method according to claim 1, it is characterised in that the activated sludge is to take
From the activated sludge of sewage treatment plant aeration tank, the sludge concentration into sbr reactor device is 3500~4500mg/L, sludge settling
Than being 40~50.
4. concentration liquid crystal waste water integral treatment method according to claim 1, it is characterised in that the TiO2/ active carbon is urged
Agent is laboratory self-control, and specific preparation process flow is as follows:
1. using the coconut palm that mass fraction is successively 0.2~0.5mm to commercially partial size for the NaOH of 5~10% HCl and 5~10%
Shell active carbon carries out 1~2h of surface preparation, then pulls active carbon out and is cleaned 3~5 times with tap water, will finally be cleaned up
Active carbon particle be transferred in micro-wave oven at 200~300W of power activate and dry；
2. the method dissolved by heating is used to prepare mass fraction for 1~2% 1~2L of poly-vinyl alcohol solution, then by 5g TiO2
Powder ultrasonic is dispersed in the poly-vinyl alcohol solution that mass fraction is 1~2%, and ultrasonic time is 30~60min, obtains TiO2-
Polyvinyl alcohol solution；
3. by step 1. treated active carbon puts into 2. TiO that step prepared2Continue ultrasound in polyvinyl alcohol solution
Then 30~60min drains taking-up active carbon, dries, be sealed spare in the baking oven of 80~100 DEG C of merging；Wherein TiO2
Select commercially P25TiO2。
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