CN100488887C - Ultrasonic inducing ozone cavitating method for processing industrial wastewater - Google Patents
Ultrasonic inducing ozone cavitating method for processing industrial wastewater Download PDFInfo
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- CN100488887C CN100488887C CNB2007100203843A CN200710020384A CN100488887C CN 100488887 C CN100488887 C CN 100488887C CN B2007100203843 A CNB2007100203843 A CN B2007100203843A CN 200710020384 A CN200710020384 A CN 200710020384A CN 100488887 C CN100488887 C CN 100488887C
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- ozone
- ultrasonic
- cavitation
- waste water
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Abstract
An industrial waste water treatment method by ozone ultrasonic cavitation is an economic and environment protective waste water treatment technology for the industrial production water pollution. In the present invention, micron order ozone bubble serving as nucleus cavitation is filled into the industrial waste water, and then the micron order ozone is induced by ultrasonic radiation to generate cavitation effect, and more oxygen-derived free radicals and H2O2 having oxidation are generated, at the same time, the diffusion and oxidizing reaction of ozone in industrial waste water are accelerated. During the industrial waste water treatment process, the ultrasonic frequency for inducing the micron order ozone bubble to generate cavitation effect is 20~800 kHz and the intensity of sound is more than 20 W/cm2. The method can improve the capacity and the efficiency of industrial waste water treatment.
Description
Technical field
The present invention relates to a kind of method that is used for the processing of trade effluent, be applied to cause the processing of water pollution, belong to and utilize ultrasonic cavitation and O because of industrial production
3The environmental technology field of the processing trade effluent of oxidation technology safety, economy.
Background technology
1, ultrasonic cavitation
Ultrasonic technology is a kind of novel environmental technology that development in recent years is got up, and is called as the environmental friendliness technology.Utilizing the organic pollutant of chemical pollutant, especially difficult degradation in ultrasonic degradation (sonolysis) water, is the novel water technology that development in recent years is got up.Ultrasonic wave is meant the range of frequency higher (〉 16kHz that frequency ratio people ear may be heard) elastic wave, large amplitude ultrasonic wave (low frequency) concentration of energy can make medium produce high vibration, is usually used in aspects such as ultrasonic cleaning, boring, chemical treatment, emulsification.In recent years, the ultrasonic applications that begins one's study both at home and abroad especially to the improvement research of hardly degraded organic substance in the waste water, has obtained certain achievement in water treatment, along with acoustochemical birth and development, ultrasonic wave comes into one's own gradually to organic degraded and has obtained extensive studies.Ultrasonic wave is made of the compressional wave of a series of density interphases, and by liquid medium to around propagate.When acoustic energy was enough high, in the loose semi-period, the intermolecular magnetism of liquid phase was broken, and formed cavitation nucleus.The life-span of cavitation nucleus is about 0.1 μ s, and it can produce localized hyperthermia's hyperbaric environment of about 400K and 100MPa in the moment of blast], and the microjet of the about 400km/h of generation speed with intense impact power, this phenomenon is called ultrasonic cavitation.These conditions are enough to make organism that chemical bond rupture, water burning (aqueouscombustion), pyrolytic decomposition (pyrolysis) or free radical reaction take place in cavitation bubble.
2, ozone (O
3) oxidation
Ozone is the allotropic substance of oxygen, and molecular formula is O
3, be a kind of unstable gas with pungency special odor.Under normal temps, ozone is blue, but under common concentration (10-20G/M
3In the ozonized air), blue and not obvious.Ozone is commonly used to carry out sterilization and disinfection, deodorizing, taste removal, decolouring etc. because it has higher redox potential in water, has a wide range of applications in drinking water treatment.But ozone is applied to wastewater treatment and also exists some problems, and is big as cost incurred height, the ozone bubbles diameter of ozone, and utilization ratio is on the low side, makes the expense height of ozonize; Ozone and organic reaction preference are stronger, and ozone can not the permineralization pollutent at low dosage with in the short period of time, and decompose the further oxidation that the intermediate product that generates can stop ozone.The high-level oxidation technology of ozone is exactly the combination by ozonize and various water technologies, forms the hydroxyl radical free radical that oxidisability is stronger, reaction preference is lower.Therefore, improve the research focus that ozone utilization rate and oxidation capacity just become the ozone high grade oxidation method.
3, existing problem
On the one hand, because trade effluent cavitation nuclear (microbubble) content seldom, it is big to have the bubble diameter that charges and discharge ozone technology now, can not make that cavitation efficient is lower when using supersound process as the cavitation nucleus of ultrasonication; On the other hand, when using the ozonize trade effluent separately, because the ozone solution degree is low, and it is stronger with organic reaction preference, ozone can not the permineralization pollutent at low dosage with in the short period of time, decompose the further oxidation that the intermediate product that generates can stop ozone simultaneously, influence the efficient of ozonize trade effluent.
The high-level oxidation technology of ozone is exactly the combination by ozonize and various water technologies, forms the hydroxyl radical free radical that oxidisability is stronger, reaction preference is lower.Therefore, improve the research focus that ozone utilization rate and oxidation capacity just become the ozone high grade oxidation method.
4, ultrasonic and ozone cooperative effect
O
3Be the very strong strong oxidizer of a kind of oxidisability, have the ability of good sterilization and disinfection and oxidative degradation pollutent, but low because of its dissolving rate of diffusion in water, working cost is high.Discover that ultrasonic have good Degradation to these organism, to O
3Decomposition in water has good katalysis, can improve O
3Utilization ratio.Ultransonic effect is in particular in:
(1) ultrasonic raising O
3Dissolution rate
O
3Be the strong and low gas of solubleness of a kind of oxidisability, O
3Dissolution process can illustrate with general gas transfer two-film theory, improve O
3Dissolution rate, can strengthen from two aspects:
The one, improve O
3Contact area with water;
The 2nd, increase water quality mixture strength and turbulence intensity, high strength is mixed and violent turbulent fluctuation can reduce thickness of liquid film, reduces resistance, increases O3 rate of diffusion constant K G, improves O
3Dissolution rate.
Discover that ultrasonic wave can will contain O
3Bubble be ground into " microbubble ", its diameter can reach 0.2-0.3 μ m, and the gas diameter that generally discharges from aeration head is 0.5-1.0cm " microbubble ", total surface area than the high 103-104 of general bubble doubly, the result makes O
3Suddenly increase with water engaging surface is long-pending.O
3After being ground into " microbubble ", its dissolution rate can improve 103-104 doubly in theory.The shockwave that the cavitation bubble collapse produces can be strengthened the turbulent fluctuation of water, reduces thickness of liquid film, reduces O
3Water-soluble resistance improves its dissolution rate, makes O
3Strong oxidizing property fully played, improved O
3Utilization ratio.Result of study shows: when outer working modulus is the 54W ultrasonic wave, and O
3Water-soluble rate of mass transfer constant has improved 57%.
(2) intensified by ultrasonic wave O
3Decomposition
Under ultrasonic wave, O
3Can enter in the cavitation bubble, decompose rapidly under the localized hyperthermia's condition of high voltage that when cavitation, produces, discharge the O free radical.Therefore, ultrasound-enhanced O
3Oxidation capacity is because the ultrasonic cavitation effect is impelled O in the cavitation bubble
3Without the dissolving diffusion process, when gaseous state, produce fast and decompose, directly discharge free radical.So, O
3Utilization ratio greatly improves, and its strong oxidizing property is not fully exerted.
(3) ultrasonic change O
3Degradation production
Discover O
3Oxygenizement in the aqueous solution depends on decomposition condition and decomposition mechanism.It is generally acknowledged: O
3Decomposition course in water is subjected to the katalysis of OH-, is reduced very soon.And O
3When not being subjected to ultrasonication, its spontaneous degradation production is O
2O
2Though be a kind of oxygenant, at normal temperatures and pressures, oxidation capacity is poor.Ultrasonic to O
3Decomposition rate has the intensive strengthening effect, and its degradation production is H
2O
2Under the ultrasonic wave effect, water can produce cracking: O
3Under ultrasonication, produce more O free radicals, H
2O is subjected to ultrasonication, also produces.So final product is H
2O
2Be a kind of oxidizing substance, have the effect of oxidation of organic compounds.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of method of ultrasonic inducing ozone cavitating industry wastewater treating, not only cost is low to handle trade effluent with this method, non-secondary pollution, and can improve the ability and the efficient of the processing of trade effluent.
Technical scheme: the method for ultrasonic inducing ozone cavitating industry wastewater treating of the present invention is to charge and discharge micron-sized ozone bubbles as cavitation nucleus in trade effluent, induce micron-sized ozone gas to produce cavitation effect through ultrasonic radiation again, produce the oxyradical and the H of more a lot of oxygenizements
2O
2, accelerate ozone gas spreads and oxidizing reaction in trade effluent simultaneously.When handling trade effluent, inducing micron-sized ozone gas to produce the ultrasonic frequency that cavitation effect applied is 20～800kHz, the sound intensity〉20W/cm
2Micron-sized ozone bubbles is the jet thrust of ozone gas by one group of micron order spray orifice to be charged in the trade effluent obtain.
With ultrasonic and ozone cooperative effect, when handling trade effluent, ozone is charged and discharged and the ultrasonic radiation acting in conjunction.On the one hand, the jet thrust by one group of μ m level charges and discharge μ m level in trade effluent ozone gas produces cavitation effect as cavitation nucleus through ultrasonic radiation, produces the oxyradical and the H of more a lot of oxygenizements
2O
2On the other hand, ultrasonically catalyzing ozone decomposes, and its oxidation utilization ratio is improved; Reach ultrasonic and the purpose ozone cooperative effect, improve the ability and the efficient of the processing of trade effluent.
Beneficial effect: not only cost is low to adopt method of the present invention to handle trade effluent, non-secondary pollution, and can improve the ability and the efficient of the processing of trade effluent.For example utilize method of the present invention to handle the trade effluent of certain chemical fibre factory, the processing through 48 hours, its COD value is reduced to 80.99 by 8164.66 before handling, and COD value clearance is greater than 99%, reaches national relevant industrial discharge of wastewater COD value less than 100 requirement; Handle and be lower than the consuming time of the existing technology for treating industrial waste water in certain chemical fibre factory 3～4 days in 48 hours consuming time; Processing cost is 5 yuan/ton, is lower than the expense of 10 yuan/ton of the existing technology for treating industrial waste water in certain chemical fibre factory; Reached purpose efficient, the low-cost processes trade effluent.
Description of drawings
Fig. 1 is that the present invention handles the COD value clearance synoptic diagram that certain chemical fibre factory sewage work sewage is gone into factory's water sample.
Embodiment
The method of ultrasonic inducing ozone cavitating industry wastewater treating of the present invention is to charge and discharge micron-sized ozone bubbles as cavitation nucleus in trade effluent, induce micron-sized ozone gas to produce cavitation effect through ultrasonic radiation again, produce oxyradical and H that polyoxy more turns usefulness into
2O
2, accelerate ozone gas spreads and oxidizing reaction in trade effluent simultaneously.When handling trade effluent, inducing micron-sized ozone gas to produce the ultrasonic frequency that cavitation effect applied is 20～800kHz,, the sound intensity〉20W/cm
2Micron-sized ozone bubbles charges into ozone gas in the trade effluent by one group of micron-sized jet thrust and obtains.
The scene is got certain chemical fibre factory sewage work sewage and is gone into 1 ton of factory's water sample (main component for to stupid dioctyl phthalate, the COD value is 8164.66) and deposit in 1 * 1 * 1cm
2Container in, in trade effluent, charge and discharge ozone gas 10 Grams Per Hours of μ m level by the jet thrust of one group of 0.5 μ m level spray orifice at container bottom, at container top oilysewage surface the ultrasonic radiation head is inserted the about 1cm of oilysewage surface simultaneously, applying frequency is 20kHz, sound intensity 22W/cm
2Ultrasonic radiation; Handled 48 hours continuously, the COD value is reduced to 80.99, and COD value clearance is greater than 99%, reaches national relevant industrial discharge of wastewater COD value less than 100 requirement.
Claims (1)
1. the method for a ultrasonic inducing ozone cavitating industry wastewater treating, it is characterized in that this method charges and discharge micron-sized ozone bubbles as cavitation nucleus in trade effluent, induce micron-sized ozone gas to produce cavitation effect through ultrasonic radiation again, produce the oxyradical and the H of more a lot of oxygenizements
2O
2, accelerate ozone gas spreads and oxidizing reaction in trade effluent simultaneously; When handling trade effluent, inducing micron-sized ozone gas to produce the ultrasonic frequency that cavitation effect applied is 20～800kHz, the sound intensity〉20W/cm
2Micron-sized ozone bubbles is the jet thrust of ozone gas by one group of micron order spray orifice to be charged in the trade effluent obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100203843A CN100488887C (en) | 2007-02-16 | 2007-02-16 | Ultrasonic inducing ozone cavitating method for processing industrial wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100203843A CN100488887C (en) | 2007-02-16 | 2007-02-16 | Ultrasonic inducing ozone cavitating method for processing industrial wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101037255A CN101037255A (en) | 2007-09-19 |
| CN100488887C true CN100488887C (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100203843A Expired - Fee Related CN100488887C (en) | 2007-02-16 | 2007-02-16 | Ultrasonic inducing ozone cavitating method for processing industrial wastewater |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI396585B (en) | 2010-09-03 | 2013-05-21 | Ind Tech Res Inst | Method for hydrolysis of biosolids and device thereof |
| CN102417283B (en) * | 2010-09-27 | 2014-09-03 | 财团法人工业技术研究院 | Organic solid hydrolyzing method and device thereof |
| CN113200597A (en) * | 2021-06-08 | 2021-08-03 | 王子荣 | Method and device for one-step method ozone synergistic chlorine oxidation advanced treatment of nitrogen and chlorine in wastewater |
| CN113896280A (en) * | 2021-11-16 | 2022-01-07 | 昆明理工大学 | ultrasonic/ozone/H2O2System and method for combined removal of organic matters in sodium aluminate solution |
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2007
- 2007-02-16 CN CNB2007100203843A patent/CN100488887C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 超声强化O3氧化能力的机理探讨. 胡文容等.工业用水与废水，第32卷第5期. 2001 |
| 超声强化O3氧化能力的机理探讨. 胡文容等.工业用水与废水，第32卷第5期. 2001 * |
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| CN101037255A (en) | 2007-09-19 |
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