CN101759276A - Device and method for treating organic wastewater by combining ozone/potassium ferrate - Google Patents
Device and method for treating organic wastewater by combining ozone/potassium ferrate Download PDFInfo
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- CN101759276A CN101759276A CN201010039589A CN201010039589A CN101759276A CN 101759276 A CN101759276 A CN 101759276A CN 201010039589 A CN201010039589 A CN 201010039589A CN 201010039589 A CN201010039589 A CN 201010039589A CN 101759276 A CN101759276 A CN 101759276A
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Abstract
The invention discloses a device for treating organic wastewater by combining ozone/potassium ferrate, which comprises an oxygen steel bottle, an ozone generator and a reactor, wherein the bottom of the reactor is provided with an aerating device and an air inlet pipe; the upper part, the middle part and the lower part of the reactor are respectively provided with a water outlet, a sampling opening and a water inlet; an air inlet of the ozone generator is connected with the oxygen steel bottle; an air outlet of the ozone generator is connected with one end of the air inlet pipe by a flowmeter, and the other end of the air inlet pipe is connected with the aerating device. The device has simple structure and simple and convenient operation. By utilizing the oxidation capacity of the ozone and the potassium ferrate and the ozone catalyzing capacity of a decomposed product of the potassium ferrate, the degradation of organic wastewater can be obviously promoted, and the reaction time is shortened. The invention is used for treating high-concentration poisonous and harmful organic wastewater difficult for biological degradation and has high treatment efficiency.
Description
Technical field
The present invention relates to a kind of device and method that utilizes treating organic wastewater by combining ozone/potassium ferrate, belong to environmental technology and water treatment field.
Background technology
In recent years, China recurs great environmental pollution incident, directly threatens local safe drinking water, and brings for people's productive life to have a strong impact on, even causes international environment dispute and reparations.To domestic and international substantial pollution environment incident analysis as can be known, its pollutent accounts for more than 60% based on liquid state, is the main object of emergency processing.Therefore, launching the research of its fast processing disposal technology at the typical liquid pollutent is the most important thing in the major pollution incident emergence technology.
Simultaneously, the processing of hardly degraded organic substance is one of focus of environment and chemical field research, also is national economic development problem demanding prompt solution.The waste water of industries such as pharmacy, dyestuff, chemical industry discharging contains the difficult biochemical organism of high density usually, characteristics such as this type organic has that kind is many, complicated component, COD (chemical oxygen demand (COD)) concentration height, biodegradability are poor, poisonous and harmful, conventional treatment method is difficult to obtain satisfied treatment effect, becomes big technological difficulties that face in the wastewater treatment of present China.At present, materialization one biochemical coupling technique is still main method and the technology that solves this class waste water, its key is by the efficient oxidation pre-treatment, and Persistent organic pollutants are converted into the low molecule organic matter of low toxicity, readily biodegradable, is beneficial to follow-up biochemical treating processes.Wherein high-level oxidation technology such as ozone oxidation method and potassium ferrate oxidation style have obtained extensive concern as preconditioning technique.
High-level oxidation technology utilizes the larger molecular organics in the various oxygenants attack waste water, and organism obtains oxidation in the water thereby make, and reaches the purpose that purifies water.Oxygenant commonly used has ozone, chlorine, and hydrogen peroxide etc., wherein noticeable with ozone oxidation again.Ozone is as a kind of oxygenant efficiently, be widely used in water treatment field, but also there is deficiency in it, the one, ozone oxidation has stronger selectivity, often only realized in the oxidising process that larger molecular organics is to the transformation of small organic molecule in the waste water, mineralization ability is poor; The 2nd, ozone utilization rate is not high, causes ozonize expense height.How to improve ozone utilization rate, improve its mineralization ability, become the focus of recent researches pollutent.
Potassium ferrate is a kind of multi-functional water treatment agent, has obtained using widely in water treatment.Acid group (FeO in the potassium ferrate
4 2-) extremely unstable in water, very easily decompose generation oxygen and cotton-shaped ironic hydroxide.Potassium ferrate has extremely strong oxidisability, in acid and alkaline medium, electricity is respectively 2.20V and 0.72V to the standard potential of Fe (VI)/Fe (III), and oxidisability is more eager to excel in whatever one does than common oxygenants such as potassium permanganate potassium bichromate, it can a lot of materials of oxidation, as NH
2 -, SCN
-, thing such as alcohol, acid, amine, hydroxyl ketone.The oxidisability of potassium ferrate also has characteristics such as the scope of application is wide, selective, conversion rate of oxidation height, and potassium ferrate agent has advantages such as safe, nontoxic, pollution-free, non-stimulated as selective oxidation.
Summary of the invention
The device and method that the purpose of this invention is to provide a kind for the treatment of organic wastewater by combining ozone/potassium ferrate is to realize rapidly and efficiently removing the pollutent of organic waste water.
The device for the treatment of organic wastewater by combining ozone/potassium ferrate of the present invention, comprise oxygen bottle, ozonizer and reactor, the bottom of reactor is provided with aerating apparatus and inlet pipe, the top of reactor is provided with water outlet, the middle part is provided with thief hole, and the bottom is provided with water-in, and the inlet mouth of ozonizer links to each other with oxygen bottle, the air outlet of ozonizer links to each other with an end of inlet pipe through under meter, and the other end of inlet pipe links to each other with aerating apparatus.
Utilize said apparatus to handle the method for organic waste water, its operation steps is: organic waste water enters reactor from the water-in of reactor continuously, flow out from the reactor water outlet, the ozonize gas that ozonizer produces enters reactor by under meter through aerating apparatus, control ozone charge flow rate is 20～100L/h, the gas phase ozone concn is maintained 10～50mg/L, adds potassium ferrate simultaneously in reactor, and the concentration of control potassium ferrate is 0.1～5g/L.
Apparatus of the present invention are simple in structure, and are easy and simple to handle.In the present invention, ozone gas reacts rapidly with organic pollutant on the one hand, can promote on the other hand the pollutent of inside reactor and potassium ferrate homodisperse, contact, thereby improve mass-transfer efficiency; After potassium ferrate adds reactor, rapidly dissolving and with organic pollutant reaction, the degradation production of potassium ferrate has certain catalytic capability to ozone simultaneously, can significantly improve the ability of ozone degradation organic pollutant, shortens the reaction times.The present invention can be used for handling the high density poisonous and harmful organic wastewater of difficult for biological degradation, processing efficiency height.
Description of drawings
Fig. 1 is apparatus of the present invention synoptic diagram.
Fig. 2 is an embodiment nitrobenzene degradation graphic representation.
Embodiment
For a better understanding of the present invention, the invention will be further described below in conjunction with accompanying drawing and specific embodiment.
With reference to Fig. 1, the device for the treatment of organic wastewater by combining ozone/potassium ferrate of the present invention, comprise oxygen bottle 1, ozonizer 2 and reactor 5, the bottom of reactor 5 is provided with aerating apparatus 9 and inlet pipe 4, and the top of reactor 5 is provided with water outlet 8, and the middle part is provided with thief hole 7, the bottom is provided with water-in 6, the inlet mouth of ozonizer 2 links to each other with oxygen bottle 1, and the air outlet of ozonizer 2 links to each other with an end of inlet pipe 4 through under meter 3, and the other end of inlet pipe 4 links to each other with aerating apparatus 9.
Embodiment:
Adopt apparatus of the present invention treatment of Nitrobenzene waste water: get 350mg/L nitrobenzene solution 500mL and add in the reactor, at pH=5.74, temperature is 20 ℃, control ozone flow is 36L/h, potassium ferrate concentration is under the 0.35g/L condition, and certain hour sampling 5mL adds 1mol/LNa at interval
2SO
3Solution 20 μ L termination reactions are passed through centrifugation (8000rpm) 10min then, get supernatant liquor through 0.22 μ m membrane filtration post analysis nitro phenenyl concentration.Investigate respectively and add potassium ferrate separately, feed ozone gas and both add the influence of p-nitrophenyl clearance altogether, experimental result as shown in Figure 2.From Fig. 2 as seen, ozone/potassium ferrate coupling treatment of Nitrobenzene waste water has the obvious synergistic effect, and both add reaction 40min altogether, and the clearance of p-nitrophenyl is 98%, and independent ozone and potassium ferrate oxidation oil of mirbane, clearance only is 85% and 37%.
Claims (2)
1. the device for the treatment of organic wastewater by combining ozone/potassium ferrate, it is characterized in that comprising oxygen bottle (1), ozonizer (2) and reactor (5), the bottom of reactor (5) is provided with aerating apparatus (9) and inlet pipe (4), the top of reactor (5) is provided with water outlet (8), the middle part is provided with thief hole (7), the bottom is provided with water-in (6), the inlet mouth of ozonizer (2) links to each other with oxygen bottle (1), the air outlet of ozonizer (2) links to each other through the end of under meter (3) with inlet pipe (4), and the other end of inlet pipe (4) links to each other with aerating apparatus (9).
2. utilize the described device of claim 1 to handle the method for organic waste water, it is characterized in that organic waste water enters reactor from the water-in (6) of reactor continuously, flow out from reactor water outlet (8), the ozonize gas that ozonizer (2) produces enters reactor by under meter (3) through aerating apparatus (9), control ozone charge flow rate is 20～100L/h, the gas phase ozone concn is maintained 10～50mg/L, add simultaneously potassium ferrate in reactor, the concentration of control potassium ferrate is 0.1～5g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039589A CN101759276A (en) | 2010-01-08 | 2010-01-08 | Device and method for treating organic wastewater by combining ozone/potassium ferrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039589A CN101759276A (en) | 2010-01-08 | 2010-01-08 | Device and method for treating organic wastewater by combining ozone/potassium ferrate |
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| CN101759276A true CN101759276A (en) | 2010-06-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036293A (en) * | 2015-08-27 | 2015-11-11 | 哈尔滨工业大学 | Method for removing organic pollutants in water by ferrate reinforced ozone oxidation |
| CN110156144A (en) * | 2018-03-30 | 2019-08-23 | 铜仁学院 | A method of strengthening ozone oxidation using ferrate and removes organic pollutants |
| CN113998769A (en) * | 2021-11-19 | 2022-02-01 | 山东建筑大学 | Sewage treatment oxidation system |
-
2010
- 2010-01-08 CN CN201010039589A patent/CN101759276A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036293A (en) * | 2015-08-27 | 2015-11-11 | 哈尔滨工业大学 | Method for removing organic pollutants in water by ferrate reinforced ozone oxidation |
| CN110156144A (en) * | 2018-03-30 | 2019-08-23 | 铜仁学院 | A method of strengthening ozone oxidation using ferrate and removes organic pollutants |
| CN113998769A (en) * | 2021-11-19 | 2022-02-01 | 山东建筑大学 | Sewage treatment oxidation system |
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Open date: 20100630 |