CN111517539A - Treatment method of high-concentration high-ammonia nitrogen organic sewage - Google Patents
Treatment method of high-concentration high-ammonia nitrogen organic sewage Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 33
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- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000005751 Copper oxide Substances 0.000 claims abstract description 29
- 229910000431 copper oxide Inorganic materials 0.000 claims abstract description 29
- 230000003197 catalytic effect Effects 0.000 claims abstract description 28
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 28
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 24
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 230000001590 oxidative effect Effects 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000010979 pH adjustment Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 description 18
- 229910052799 carbon Inorganic materials 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 12
- 239000002351 wastewater Substances 0.000 description 7
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- 230000008023 solidification Effects 0.000 description 3
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- 238000010525 oxidative degradation reaction Methods 0.000 description 2
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- 230000003014 reinforcing effect Effects 0.000 description 2
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
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- 238000006555 catalytic reaction Methods 0.000 description 1
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- 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
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- 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
- C02F1/725—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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Treatment Of Water By Oxidation Or Reduction (AREA)
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Abstract
The invention provides a method for treating high-concentration high-ammonia nitrogen organic sewage, which comprises the following steps: (1) pretreatment, namely adjusting the pH value of the sewage to 4-7 by adopting a first pH adjusting device; (2) enabling the sewage to pass through a first microwave resonant cavity device pre-filled with activated carbon and copper oxide, wherein the copper oxide is used as a catalyst and loaded on the activated carbon, and an oxidant is selected from hydrogen peroxide, and performing wet catalytic oxidation reaction under the microwave condition; (3) adjusting the pH value of the sewage to 8-11 by adopting a second pH adjusting device; (4) and (3) passing the sewage through a second microwave resonant cavity device pre-filled with activated carbon, and removing ammonia nitrogen under the microwave condition. The treatment method has the characteristics of high removal efficiency, high speed, low energy consumption and high treatment load on the high-concentration high-ammonia nitrogen organic sewage, can realize industrial treatment of the industrial sewage, and is a green treatment process of the high-concentration high-ammonia nitrogen organic sewage with wide prospect.
Description
Technical Field
The invention relates to the technical field of sewage treatment and recycling, in particular to a method for treating high-concentration high-ammonia nitrogen organic sewage.
Background
Industrial wastewater often contains organic substances such as phenols, benzenes, cyanides, etc. which are difficult to degrade biologically. Therefore, other technical means for treating industrial wastewater are required. In addition, the large-area water eutrophication is caused by the large discharge of ammonia nitrogen in the industrial sewage, and the life and health of people are seriously harmed. The treatment of high-concentration ammonia nitrogen in industrial sewage is beyond the range of biological treatment, and other physical and chemical technologies are required.
The wet air oxidation technology is a chemical process for oxidizing and decomposing organic pollutants difficult to degrade into inorganic substances or organic micromolecules such as carbon dioxide, water and the like by using air as an oxidant at high temperature (125-320 ℃) and high pressure (0.5-20 MPa). The wet air oxidation technology is a promising advanced oxidation technology, but the wet air oxidation technology generally requires the reaction to be carried out under the conditions of high temperature and high pressure, and simultaneously requires the material to have the characteristics of high temperature and high pressure resistance and corrosion resistance, thereby causing the problems of difficulty in material selection of the system, large one-time investment of equipment systems and the like.
In order to overcome the defects of the wet air oxidation technology, a wet catalytic oxidation technology is formed by introducing a catalyst. By adding proper catalyst in the reaction process, the reaction temperature and pressure are reduced, the oxidative decomposition capability is effectively improved, the reaction speed is accelerated, and the reaction time is shortened. Catalytic wet hydrogen peroxide (H)2O2) The oxidation technique is defined as the reaction with H2O2Is an oxidant, and under the catalytic action of a catalyst, H is generated2O2Rapidly decomposing to generate hydroxyl free radicals, and removing organic matters in the wastewater through the strong oxidation of the hydroxyl free radicals. Compared with the traditional wet air oxidation technology, the technology reduces the conditions of temperature, pressure and the like required by the reaction, so that the problems of equipment corrosion, operation safety and the like caused by high pressure are solved; all in oneDue to the use of H2O2As an oxidant, the mass transfer resistance between gas and liquid is eliminated, and the reaction speed is further accelerated. Catalytic wet H2O2The oxidation technology generally shows good catalytic degradation performance to industrial wastewater, and can be applied to treatment processes of various industrial wastewater such as coking wastewater, phenol-containing wastewater \ dye wastewater, papermaking wastewater and the like.
In order to further improve the efficiency of treating the high-difficulty organic wastewater, ozone coupling wet catalytic oxidation and ultraviolet coupling wet catalytic oxidation technologies are subsequently developed, but the novel wet catalytic oxidation technologies still have certain defects and problems, which are mainly shown as follows:
1) the ozone coupling wet catalytic oxidation has low electric energy utilization efficiency, high energy consumption and long reaction time;
2) the ultraviolet coupling wet catalytic oxidation has poor sewage treatment effect, high energy consumption and long reaction time on the aspects of more impurities, high turbidity and poor light transmittance;
3) the existing ozone coupling wet catalytic oxidation and ultraviolet coupling wet catalytic oxidation can effectively degrade organic matters and improve the B/C ratio, but can not obviously reduce COD; the ammonia nitrogen removal effect on the industrial sewage is poor.
In view of the above, there is a need to provide a method for treating high-concentration high-ammonia nitrogen organic sewage to solve the above technical drawbacks.
Disclosure of Invention
The invention aims to provide a method for treating high-concentration high-ammonia nitrogen organic sewage, which has the advantages of high removal efficiency, high speed, low energy consumption and high treatment load for the high-ammonia nitrogen organic sewage, can realize industrial treatment of industrial sewage, and is a green treatment process for the high-concentration high-ammonia nitrogen organic sewage with wide prospect.
The invention is realized by the following technical scheme:
the method for treating the high-concentration high-ammonia nitrogen organic sewage comprises the following steps:
(1) pretreatment, namely adjusting the pH value of the sewage to 4-7 by adopting a first pH adjusting device;
(2) enabling the sewage to pass through a first microwave resonant cavity device pre-filled with activated carbon and copper oxide, wherein the copper oxide is used as a catalyst and loaded on the activated carbon, and an oxidant is selected from hydrogen peroxide, and performing wet catalytic oxidation reaction under the microwave condition;
(3) adjusting the pH value of the sewage to 8-11 by adopting a second pH adjusting device;
(4) and (3) passing the sewage through a second microwave resonant cavity device pre-filled with activated carbon, and removing ammonia nitrogen under the microwave condition.
Compared with the prior art, the pH value of the sewage is adjusted to 4-7 by the first pH adjusting device, so that the copper oxide catalyst is prevented from being corroded in an acid environment to cause catalyst loss and secondary pollution, meanwhile, the hydrogen peroxide is prevented from being decomposed under a strong alkaline condition, and the wet catalytic oxidation reaction in the first microwave resonant cavity device is facilitated. The wet catalytic oxidation reaction is carried out under the microwave condition, namely a Fenton-like system is formed by taking copper oxide as a catalyst and hydrogen peroxide as an oxidant, and the generated hydroxyl radical (. OH) has strong oxidative degradation performance and is relatively stable in reaction. Because the copper oxide has good absorption capacity to microwaves, the introduction of the microwaves effectively improves the catalytic capacity of the copper oxide. Still because the active carbon is filled in advance in the first microwave resonant cavity device, copper oxide is as the catalyst and load on active carbon, can full play active carbon to the good adsorption efficiency of microwave, the catalytic activity of reinforcing copper oxide also is favorable to improving the degradation rate of pollutant, can also be through the dispersion and the solidification of active carbon, reinforcing copper oxide's stability, still be convenient for simultaneously change. And adjusting the pH value of the sewage to 8-11 by a second pH adjusting device to realize ammonia nitrogen removal in a second microwave resonant cavity device. Under the environment of higher pH value, the active carbon has strong microwave absorbing capacity, microwave radiation generates 'hot spots' on the surface of the active carbon, and NH is absorbed4+Conversion to NH3Realize the removal of ammonia nitrogen, promote ammonia nitrogen wastewater treatment effect. The method for treating the high ammonia nitrogen organic sewage has the advantages of high removal efficiency, high speed, low energy consumption and high treatment load, can realize industrial treatment of industrial sewage, and is a green treatment process of high-concentration high ammonia nitrogen organic sewage with wide prospect.
Preferably, before the first pH adjusting device is used for adjusting the pH of the sewage, the sewage is filtered.
Preferably, the method also comprises a step (5), wherein ammonia gas after ammonia nitrogen removal enters a collecting tank, and water or dilute acid is adopted to absorb the ammonia gas, so that secondary pollution is avoided.
Preferably, in the step (2) and the step (4), the temperature is controlled to be 60-80 ℃.
Preferably, said first microwave cavity means and said second microwave cavity means each comprise:
a magnetron for converting electrical energy into microwave energy;
a resonant cavity having a cavity, a reactor cavity for microwave heating and reaction;
the magnetron comprises a waveguide tube and a slot antenna head, wherein electromagnetic waves generated by the magnetron are transmitted by the waveguide tube and are coupled into the resonant cavity through the slot antenna head.
Preferably, the resonant cavity is cylindrical, the two waveguide tubes are rectangular and are arranged, the two waveguide tubes are arranged on two sides of the resonant cavity, the slot antenna head is arranged between the resonant cavity and the waveguide tubes, and 1 magnetron is respectively arranged at four corners of the two waveguide tubes far away from the resonant cavity.
Preferably, the middle part of the waveguide tube in a rectangular structure is provided with a spacer.
Preferably, the plurality of first microwave cavity means are arranged in series or in parallel; the plurality of second microwave cavity means may be arranged in series or in parallel.
Drawings
FIG. 1 is a schematic flow chart of the treatment process of high-concentration high-ammonia nitrogen organic sewage.
FIG. 2 is a schematic diagram of the structure of a first microwave cavity apparatus or a second microwave cavity apparatus according to the present invention.
Detailed Description
The technical solutions of the present invention are further illustrated by the following specific embodiments, but the present invention is not limited thereto.
As shown in figure 1, the process flow of the treatment of the high-concentration high-ammonia nitrogen organic sewage is shown schematically. The method for treating the high-concentration high-ammonia nitrogen organic sewage comprises the following steps:
(1) pretreatment, namely filtering the sewage, and then adjusting the pH value of the sewage to 4-7 by adopting a first pH adjusting device 11;
(2) passing the sewage through a first microwave resonant cavity device 20 pre-filled with activated carbon and copper oxide, wherein the copper oxide is used as a catalyst and loaded on the activated carbon, and an oxidant is selected from hydrogen peroxide, and performing wet catalytic oxidation reaction under the microwave condition;
(3) a second pH adjusting device 30 is adopted to adjust the pH value of the sewage to 8-11;
(4) and (3) passing the sewage through a second microwave resonant cavity device 40 pre-filled with activated carbon, and removing ammonia nitrogen under the microwave condition.
(5) The ammonia gas with ammonia nitrogen removed enters a collecting tank 50, and is absorbed by water or dilute acid, so that secondary pollution is avoided. The treated clean water flows into the buffer tank 60 and is discharged after reaching the standard.
Wherein, the sewage in the step (1) is filtered by a filter tank 13, the sewage in the filter tank 13 is controlled to flow into a first pH adjusting device 11 through a throttle valve after being filtered, oxidant hydrogen peroxide and pH condition medicament are added into the first pH adjusting device 11 and are uniformly mixed under the action of a stirrer, and the pH value of the sewage is adjusted to be 4-7. The corrosion of the copper oxide catalyst in an acidic environment to cause catalyst loss and secondary pollution is avoided, and the decomposition of hydrogen peroxide under a strong alkaline condition is avoided, so that the wet catalytic oxidation reaction in the first microwave resonant cavity device 20 is facilitated.
In the step (2), the on-off of the electromagnetic valve is controlled according to the requirement through the functions of the pressure gauge, the booster pump and the flowmeter, the sewage is controlled to enter the first microwave resonant cavity device 20 at a certain flow rate, the retention time is 3-10 minutes, the wet catalytic oxidation reaction is carried out under the action of the catalyst copper oxide and the oxidant hydrogen peroxide, the degradation of the refractory organic matters is realized, the first microwave resonant cavity device 20 provides microwaves, and the copper oxide has good absorption capacity on the microwaves, good catalysis performance and a wide pH application range. Furthermore, the copper oxide is used as a catalyst and loaded on the activated carbon, so that the good adsorption capacity of the activated carbon to microwaves can be fully exerted, the catalytic activity of the copper oxide is enhanced, the degradation rate of organic pollutants is favorably improved, the stability of the copper oxide can be enhanced through the dispersion and solidification of the activated carbon, and meanwhile, the copper oxide is convenient to replace.
In the step (3), the pH value of the sewage is adjusted to be high by means of the second pH adjusting device 30 so as to be suitable for ammonia nitrogen removal reaction. Preferably, the pH of the wastewater is adjusted to 11 by means of the second pH adjusting device 30.
In the step (4), the sewage stays in the second microwave resonant cavity device 40 for 3-10 minutes, the second microwave resonant cavity device 40 is filled with activated carbon, the activated carbon has strong microwave absorption capacity, the activated carbon forms high-temperature points (hot points) on the surface of the material under the action of microwave radiation, and the sewage and the high-temperature points of the activated carbon perform physical and chemical reaction under the environment of higher pH value to react NH4+Conversion to NH3So that ammonia nitrogen in the sewage escapes in an ammonia gas mode, the denitrification reaction is completed, and the denitrification effect is achieved.
In the step (5), the ammonia gas with ammonia nitrogen removed enters a collecting tank 50, and water or dilute acid is adopted to absorb the ammonia gas, so that secondary pollution is avoided. The treated clean water flows into the buffer tank 60 and is discharged after reaching the standard.
Wherein, the treatment units in the whole treatment process of the high-concentration high-ammonia nitrogen organic sewage are connected by pipelines, and the pipelines can be water-passing by polytetrafluoroethylene pipes to form transition sections and avoid microwave interference among the reaction units. The whole pipeline can be provided with a pressure regulating (pressure regulating valve) and a throttling (throttle valve) device to regulate the flow rate of the sewage in the whole treatment process.
Wherein, in the step (2) and the step (4), the temperature is controlled to be 60-80 ℃.
Referring to fig. 2, there is shown a schematic structural diagram of the first microwave resonant cavity device 20 and the second microwave resonant cavity device 40 in the method for treating high-concentration high-ammonia nitrogen organic sewage of the present application, except that the first microwave resonant cavity device 20 and the second microwave resonant cavity device 40 are different in filling material, and the structures of the two devices are basically the same. Specifically, the first microwave cavity means 20 and the second microwave cavity means 40 each include a magnetron 21, a cavity 23, a waveguide 25, and a slot antenna head 27. The magnetron 21 is used for converting electric energy into microwave energy; the resonant cavity 23 has a cavity, a cavity for microwave heating and reaction; the electromagnetic wave generated by the magnetron 21 is transmitted by the waveguide 25 and coupled into the resonant cavity 23 through the slot antenna head 27. When the power is switched on, the magnetron 21 starts to work to generate microwave energy, the microwave energy is output and transmitted by the waveguide tube 25, the energy is coupled into the resonant cavity 23 through the slot antenna head 27, and the microwave radiates and heats the sewage flowing through the resonant cavity 23 to generate catalytic oxidation degradation reaction and ammonia nitrogen removal reaction.
Referring to fig. 2, in the present embodiment, the resonant cavity 23 is cylindrical, the two waveguide tubes 25 are rectangular and are disposed, the two waveguide tubes 25 are disposed on two sides of the resonant cavity 23, the slot antenna head 27 is disposed between the resonant cavity 23 and the waveguide tubes 25, and 1 magnetron 21 is disposed at each of four corners of the two waveguide tubes 25 far away from the resonant cavity 23. The filling material is located in the cylindrical resonant cavity 23. The frequency of the electromagnetic wave can be 915MHz and 2.45GHz, and the dimensions of the resonant cavity 23 and the waveguide 25 can be designed according to actual requirements.
The invention adopts a cylindrical resonant cavity 23 to construct a microwave reactor unit, and a rectangular waveguide tube 25 and a slot antenna head 27 can be adopted for electromagnetic wave transmission. The slot antenna head 27 is selected to perform multi-port feeding, so that the radiation of each feed port in the cylindrical cavity 23 can be ensured to have better uniformity. In this embodiment, slot antenna heads 27 are disposed on two sides of the resonant cavity 23 as microwave feeding ports. The waveguide is a standard BJ26 waveguide, the main mode is a TE10 mode, the frequency of the main mode is 2.45GHz, and four magnetrons 21 are arranged in the whole device. The power of the single magnetron 21 is 500-1000W. Therefore, the output power of the reaction unit of the single microwave resonant cavity 23 is 2000W-4000W. When four magnetrons 21 are operated simultaneously, the electromagnetic field distribution in the cylindrical resonant cavity 23 is overlapped by the four magnetrons 21, and the uniformity is obviously improved compared with that when a single magnetron 21 is operated. Further, in order that the excitations of the two magnetrons 21 do not affect each other, a spacer 29 is provided in the middle of the rectangular waveguide. Furthermore, since the resonant cavity 23 is cylindrical, the plurality of first microwave resonant cavity devices 20 are arranged in series, and the plurality of second microwave resonant cavity devices 40 are arranged in series, the quality of the treated effluent can be improved. The plurality of first microwave resonant cavity devices 20 are arranged in parallel, and the plurality of second microwave resonant cavity devices 40 are arranged in parallel, so that the sewage treatment capacity can be effectively expanded, the process is safe and reliable, the occupied area is small, and the industrialized microwave treatment process can be really realized.
Compared with the prior art, the pH value of the sewage is adjusted to 4-7 by the first pH adjusting device 11, so that the copper oxide catalyst is prevented from being corroded in an acid environment to cause catalyst loss and secondary pollution, meanwhile, the hydrogen peroxide is prevented from being decomposed under a strong alkaline condition, and the wet catalytic oxidation reaction in the first microwave resonant cavity device 20 is facilitated. The wet catalytic oxidation reaction is carried out under the microwave condition, namely a Fenton-like system is formed by taking copper oxide as a catalyst and hydrogen peroxide as an oxidant, and the generated hydroxyl radical (. OH) has strong oxidative degradation performance and is relatively stable in reaction. Because the copper oxide has good absorption capacity to microwaves, the introduction of the microwaves effectively improves the catalytic capacity of the copper oxide. Still because the active carbon is filled in advance in the first microwave resonant cavity device 20, copper oxide is as the catalyst and load on the active carbon, can full play the good adsorption efficiency of active carbon to the microwave, strengthens the catalytic activity of copper oxide, also is favorable to improving the degradation rate of pollutant, can also be through the dispersion and the solidification of active carbon, strengthens the stability of copper oxide, still be convenient for simultaneously change. The pH value of the sewage is adjusted to 8-11 by the second pH adjusting device 30, so that ammonia nitrogen in the second microwave resonant cavity device 40 is removed. Under the environment of higher pH value, the active carbon has strong microwave absorbing capacity, microwave radiation generates 'hot spots' on the surface of the active carbon, and NH is absorbed4+Conversion to NH3Realize the removal of ammonia nitrogen, promote ammonia nitrogen wastewater treatment effect. The method has high efficiency, high speed, low energy consumption and high treatment load for removing the high ammonia nitrogen organic sewage, can realize industrial treatment of the industrial sewage, and is a green treatment process of the high-concentration high ammonia nitrogen organic sewage with wide prospect.
It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that those skilled in the art will be able to modify the invention in its various equivalent forms after reading the present invention and to fall within the scope of the invention as defined in the appended claims.
Claims (8)
1. A treatment method of high-concentration high-ammonia nitrogen organic sewage is characterized by comprising the following steps:
(1) pretreatment, namely adjusting the pH value of the sewage to 4-7 by adopting a first pH adjusting device;
(2) enabling the sewage to pass through a first microwave resonant cavity device pre-filled with activated carbon and copper oxide, wherein the copper oxide is used as a catalyst and loaded on the activated carbon, and an oxidant is selected from hydrogen peroxide, and performing wet catalytic oxidation reaction under the microwave condition;
(3) adjusting the pH value of the sewage to 8-11 by adopting a second pH adjusting device;
(4) and (3) passing the sewage through a second microwave resonant cavity device pre-filled with activated carbon, and removing ammonia nitrogen under the microwave condition.
2. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 1, wherein the sewage is filtered before being subjected to pH adjustment by using the first pH adjusting device.
3. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 1, further comprising the step (5) of introducing ammonia gas from which ammonia nitrogen is removed into a collection tank and absorbing the ammonia gas with water or dilute acid.
4. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 1, wherein the temperature in step (2) and step (4) is controlled to be 60-80 ℃.
5. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 1, wherein the first microwave cavity resonator device and the second microwave cavity resonator device both comprise:
a magnetron for converting electrical energy into microwave energy;
a resonant cavity having a cavity, a reactor cavity for microwave heating and reaction;
the magnetron comprises a waveguide tube and a slot antenna head, wherein electromagnetic waves generated by the magnetron are transmitted by the waveguide tube, and are coupled into the resonant cavity through the slot antenna head.
6. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 5, wherein the resonant cavity is cylindrical, the number of the waveguide tubes is two, the two waveguide tubes are located at two sides of the resonant cavity, the slot antenna head is located between the resonant cavity and the waveguide tubes, and 1 magnetron is respectively arranged at four corners of the two waveguide tubes far away from the resonant cavity.
7. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 6, wherein a spacer is arranged in the middle of the waveguide tube with a rectangular structure.
8. The method for treating high-concentration high-ammonia nitrogen organic sewage according to claim 1, wherein a plurality of the first microwave resonant cavity devices are arranged in series or in parallel; a plurality of said second microwave cavity means may be arranged in series or in parallel.
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| CN202010254221.7A CN111517539B (en) | 2020-04-02 | 2020-04-02 | Treatment method of high-concentration high-ammonia nitrogen organic sewage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060738A (en) * | 2021-03-22 | 2021-07-02 | 哈尔滨工业大学 | Preparation of rice hull source functional carbon based on novel ammonia method carbon capture and nano SiO2Synthesis method |
| CN114835210A (en) * | 2022-04-28 | 2022-08-02 | 南昌航空大学 | Novel method for treating cyanide through electrocatalysis coupling ultraviolet light auxiliary advanced oxidation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045663A (en) * | 1998-04-22 | 2000-04-04 | Cha; Chang Yul | Process for microwave enhancement of wet oxidation |
| US6187988B1 (en) * | 1999-02-26 | 2001-02-13 | Chang Yul Cha | Process for microwave decomposition of hazardous matter |
| CN1837073A (en) * | 2006-04-12 | 2006-09-27 | 华中科技大学 | Treatment method for denitrogenation of waste water |
| CN103159282A (en) * | 2012-12-25 | 2013-06-19 | 湘潭大学 | Method for catalyzing and degrading phenolic wastewater through microwaves |
| CN105502772A (en) * | 2016-01-04 | 2016-04-20 | 杭州科瑞特环境技术有限公司 | Synergistic treatment device for degradation-resistant organic waste water and method thereof |
| CN107892419A (en) * | 2017-12-19 | 2018-04-10 | 安徽工业大学 | A kind of method of self-loopa microwave catalysis oxidation processing sewage |
-
2020
- 2020-04-02 CN CN202010254221.7A patent/CN111517539B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045663A (en) * | 1998-04-22 | 2000-04-04 | Cha; Chang Yul | Process for microwave enhancement of wet oxidation |
| US6187988B1 (en) * | 1999-02-26 | 2001-02-13 | Chang Yul Cha | Process for microwave decomposition of hazardous matter |
| CN1837073A (en) * | 2006-04-12 | 2006-09-27 | 华中科技大学 | Treatment method for denitrogenation of waste water |
| CN103159282A (en) * | 2012-12-25 | 2013-06-19 | 湘潭大学 | Method for catalyzing and degrading phenolic wastewater through microwaves |
| CN105502772A (en) * | 2016-01-04 | 2016-04-20 | 杭州科瑞特环境技术有限公司 | Synergistic treatment device for degradation-resistant organic waste water and method thereof |
| CN107892419A (en) * | 2017-12-19 | 2018-04-10 | 安徽工业大学 | A kind of method of self-loopa microwave catalysis oxidation processing sewage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060738A (en) * | 2021-03-22 | 2021-07-02 | 哈尔滨工业大学 | Preparation of rice hull source functional carbon based on novel ammonia method carbon capture and nano SiO2Synthesis method |
| CN114835210A (en) * | 2022-04-28 | 2022-08-02 | 南昌航空大学 | Novel method for treating cyanide through electrocatalysis coupling ultraviolet light auxiliary advanced oxidation |
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