CN103359810A - Wastewater treatment method - Google Patents
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- CN103359810A CN103359810A CN2012100915868A CN201210091586A CN103359810A CN 103359810 A CN103359810 A CN 103359810A CN 2012100915868 A CN2012100915868 A CN 2012100915868A CN 201210091586 A CN201210091586 A CN 201210091586A CN 103359810 A CN103359810 A CN 103359810A
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Abstract
The invention discloses a wastewater treatment method which comprises the following step: under the action of a magnetic field, suspending magnetic catalyst granules capable of catalyzing organic matters in wet oxidation wastewater in wastewater, thus performing catalytic wet oxidation treatment on the wastewater. The method provided by the invention can improve the solid-liquid mass transfer and heat transfer in a reactor, enhance the reaction effect, reduce the reaction temperature and pressure and well avoid the hardening problem of the catalyst in the wastewater treatment process, and has better and more stable wastewater treatment effect, thereby effectively reducing the COD (chemical oxygen demand) value of the wastewater and improving the biodegradability of the wastewater.
Description
Technical field
The present invention relates to a kind for the treatment of process of waste water.
Background technology
In Industrial processes, usually can produce the organic high-concentration waste water of a class, because the content of organic composition is higher in this class waste water, sometimes also can contain poisonous and hazardous material in the waste water, adopt general simple biochemical processing method, be difficult to reach emission request.And the methods such as employing burning are processed organic high-concentration waste water, and not only power consumption is large, and running expense is high, and easily causes secondary pollution.And adopt wet oxidation process to process organic high-concentration waste water, and the advantage such as have and running is stable efficient, energy-conservation, therefore, be subject to people's common concern and welcome.Described wet oxidation process refers under higher temperature and pressure, carry out oxidizing reaction with organic waste water and air (or oxygen) together, makes oxidation operation in the waste water resolve into the process of carbonic acid gas and water.In the process of the method for implementing wet oxidation, add a certain amount of catalyzer, not only can reduce temperature of reaction and reaction pressure and can also obtain better treatment effect, thereby more and more obtain everybody attention.
For example, CN102039128A discloses a kind of waste water wet oxidizing catalyst, comprises following component in parts by weight in this catalyzer: 90-99.9 part is selected from TiO
2, Al
2O
3, SiO
2Or ZrO
2In at least a carrier; With at least a metal or the oxide compound among load 0.1-10 part Pt, Pd, Ru, Ir or the Rh thereon; 0.01-5 part is selected from least a oxide compound in Bi, Ba, Mg, B, V, Mo or the rare earth.The wet oxidation of adopting described catalyzer to carry out waste water is processed and mainly to be solved biological inhibition when sulfur-containing waste water processed, the COD removal is not high and the problem such as complex process, and mainly solves the problem that can not process simultaneously other Organic pollutants and secondary pollution in the waste water when cyanide wastewater processed.
And for example, CN102125842A discloses a kind of multiphase wet oxidation catalyst, and this catalyzer is take precious metal element as active ingredient, and described precious metal element is selected from one or more in platinum, ruthenium, rhodium, iridium, the gold; Take rare earth element as auxiliary component, described rare earth element is selected from one or more in lanthanum, cerium, praseodymium, the neodymium; Described active ingredient and auxiliary component support on the ceramic-absorbent charcoal carrier, wherein, gac content is the 1-15% of described ceramic-absorbent charcoal total weight of carrier, and the weight of every kind of element accounts for the 0.25-5% of gac weight separately in active ingredient and the auxiliary component.Described catalyzer is specially adapted to process the organic waste water of high-concentration hardly-degradable.
Aforesaid method mainly concentrates in the improvement of catalyzer preparation, and not mentioned improvement to wet-type oxidation technology.But it is not ideal enough that existing wet-type oxidation technology remains at treatment effect, conducts heat in the reaction process, mass transfer is inhomogeneous, and catalyzer easily hardens and the shortcoming such as catalyst change trouble, thereby affects the treatment effect of waste water and the stability of wastewater treatment.Thereby be necessary to develop more effective, method is processed high concentrated organic wastewater more easily.
Summary of the invention
The employing Wet Oxidation Process that the object of the invention is to overcome prior art process in the reaction process of waste water conduct heat, mass transfer is inhomogeneous and catalyzer easily hardens and affect the treatment effect of waste water and the defective of Treatment Stability, thereby provide in a kind of reaction process that adopts Wet Oxidation Process to process waste water conduct heat, mass transfer evenly, and can prevent the method that waste water is processed that hardening of wet oxidizing catalyst is can be effectively also stable.
To achieve these goals, the invention provides a kind for the treatment of process of waste water, wherein, the method is included under the effect in magnetic field, tool is magnetic, and can Catalytic Wet Oxidation waste water in organic granules of catalyst be suspended in the waste water, waste water is carried out Catalytic Wet Oxidation processes.
Method of wastewater treatment provided by the invention is by under the effect of externally-applied magnetic field, make tool magnetic, and the organic granules of catalyst in can Catalytic Wet Oxidation waste water is suspended in the waste water, waste water is carried out wet oxidation to be processed, on the one hand, under the effect of externally-applied magnetic field, the wet oxidation treatment effect can significantly improve, on the other hand, the method of the invention can be improved solid-liquid mass transfer and the heat transfer in the reactor, avoid well the problem that hardens of catalyzer in the wastewater treatment process, therefore, better to the treatment effect of waste water, more stable, thereby can effectively reduce the COD value of waste water, and improve the biodegradability of waste water.In addition, method provided by the invention is more simple, the not only loading and unloading of catalyzer, changes more conveniently, quick, but also has avoided the loss of catalyzer in the exiting water process.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Embodiment
Below will be elaborated to the specific embodiment of the present invention.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
According to the present invention, the treatment process of described waste water is included under the effect in magnetic field, tool is magnetic, and can Catalytic Wet Oxidation waste water in organic granules of catalyst be suspended in the waste water, waste water is carried out Catalytic Wet Oxidation processes.
According to the present invention, under the effect in magnetic field, tool is magnetic, and can Catalytic Wet Oxidation waste water in organic granules of catalyst be suspended in the waste water, waste water is carried out in the process of Catalytic Wet Oxidation processing, the size in described magnetic field can guarantee to make that described granules of catalyst is static is suspended in the waste water, and it is fully contacted with waste water.
According to the present invention, wet oxidation process is under the condition of high temperature and high pressure, in liquid phase, utilize air or oxygen as oxygenant, solubilised state in the waste water or suspended state oxidation operation are become carbonic acid gas and water, thereby reach the purpose of removing pollutent, simultaneously the reduction-state inorganics is oxidized to the stable state material.Under High Temperature High Pressure, water and wide variation have all occured as the physical properties of the oxygen of oxygenant, the rising of the solubility with temperature of oxygen in water increases on the contrary, and the solubleness of solubleness under the room temperature.The spread coefficient of oxygen in water also increases with the rising of temperature simultaneously, and the wet air oxidation that carries out under the high temperature is exactly this character of having utilized oxygen and water.
Because traditional wet oxidation process needs higher temperature and pressure and the relatively long residence time, the reaction conditions that requires when especially processing some dysoxidizable organism is more harsh, therefore, usually adopt the Catalytic Wet Oxidation technology, and the Catalytic Wet Oxidation technology is exactly to add catalyzer in traditional wet oxidation treatment process, reduce the required temperature and pressure of reaction, improve oxidative decomposition capacity, Reaction time shorten reaches and makes reaction under relatively mild condition and finish and reduce the purpose of processing cost in the shorter time.Catalytic wet air oxidation is to come the purifying treatment high concentrated organic wastewater according to the organism in the waste water carries out catalyticcombustion under High Temperature High Pressure principle, to promote organic further oxidative decomposition until be degraded to final product CO
2And H
2O, thus reached the organic purpose of oxygenolysis.
According to the present invention, the condition of described wet oxidation can be the reaction conditions of this area routine.For example, the condition of described wet oxidation generally comprises temperature, pressure and time.
Wherein, the rising of temperature helps the minimizing of water viscosity, improve the mass transfer velocity of oxygen in water, so temperature is higher, and speed of response is faster, and reaction is carried out also more thoroughly.But excess Temperature can increase energy consumption, and according to method of the present invention, adopt the magnetic catalyzer of tool, and it is suspended in the waste water, waste water is carried out Catalytic Wet Oxidation, temperature of reaction can be further reduced and the Catalytic Wet Oxidation effect can be guaranteed well, therefore, under the preferable case, the temperature of described wet oxidation is 100-300 ℃, more preferably 120-260 ℃.
Wherein, although pressure is not the direct acting factor of oxidizing reaction, carry out in liquid phase in order to keep reaction, pressure must match with temperature, namely will be higher than the saturated vapor pressure under this temperature.Simultaneously, for guaranteeing the high-solubility oxygen concentration in the liquid phase, the oxygen partial pressure in the gas phase also must remain in the suitable scope, and therefore, under the preferable case, pressure is 1-15MPa, and more preferably 1.5-10MPa most preferably is 2-5Mpa.
Wherein, the present invention was not particularly limited the time of wet oxidation, can decide on COD value and the actual needs of pending waste water.
In addition, in order to provide oxidation needed oxygenant, described wet oxidation condition is also wrapped in waste water and is passed into oxygen-containing gas, under the preferable case, amount (quality) in oxygen in the oxygen-containing gas, the amount that passes into the oxygen-containing gas in the waste water be make the oxidation operation oxygen requirement theoretical value in the waste water 1-3 doubly, more preferably in the situation, in the amount (quality) of oxygen in the oxygen-containing gas, the amount that passes into the oxygen-containing gas in the waste water be make the oxidation operation oxygen requirement theoretical value in the waste water 1.05-1.5 doubly.Wherein, described oxygen-containing gas can be air (comprising oxygen-denuded air, oxygen-rich air) or oxygen.Generally, the oxygen level of described oxygen-containing gas is at least 1 volume %, is preferably more than the 10 volume %, more preferably 10-50 volume %.
Organic quality can represent with the chemical oxygen demand (COD) (COD) of waste water in the described waste water, COD refers under certain conditions, when adopting certain strong oxidizer to process water sample, the oxidant content that consumes, it is what a index of reducing substances (being mainly organism) in the expression water.Can be understood as so, is the waste water of 1mg/L corresponding to the COD value, and making in theory the oxidation operation oxygen requirement theoretical value in the waste water is 1mg.
According to the present invention, the selectable range of the magneticstrength in described magnetic field is wider, as long as described granules of catalyst is suspended in the waste water, under the preferable case, described magneticstrength can be the 10-2000 oersted, and more preferably in the situation, described magneticstrength is the 100-1000 oersted.In the present invention, described magnetic field can be various magnetic fields, the magnetic field that produces such as electromagnetic field and/or magneticsubstance etc.The producing method in described magnetic field can adopt and well known to a person skilled in the art that ordinary method produces magnetic field.For example, conspicuous nurse hertz coil can be set at the outer wall with reactor, make itself and reactor coaxial, and in coil, pass into certain electric current, so that even, stable externally-applied magnetic field to be provided.Wherein, the winding number of turns of coil, the spacing between coil and the size that passes into the electric current in the coil can suitably be adjusted, as long as guarantee to make the magneticstrength of generation to be enough to satisfy described granules of catalyst are suspended in the waste water.
According to the present invention, if described tool is magnetic, and can Catalytic Wet Oxidation waste water in the particle diameter of organic granules of catalyst can satisfy and can suspend in water and fully contact with waste water, under the preferable case, described have magnetic, and can Catalytic Wet Oxidation waste water in the particle diameter of organic granules of catalyst can be the 0.1-2000 micron, more preferably in the situation, the particle diameter of described granules of catalyst is the 2-1000 micron, further under the preferable case, the particle diameter of described granules of catalyst is the 50-300 micron.Described tool is magnetic, and can Catalytic Wet Oxidation waste water in the selectable range of kind of organic catalyzer wider, and can be for various tools magnetic and can under the wet oxidation condition, play organic catalyzer in the Catalytic Wet Oxidation waste water.Under the preferable case, the magnetic catalyzer chosen from Fe of described tool, cobalt, nickel, they insoluble hydroxide of metal and their insoluble metal salt at least a; Perhaps chosen from Fe, cobalt, nickel, they metal oxide, they insoluble hydroxide of metal and their insoluble metal salt at least a be selected from manganese, copper, zinc, titanium, silver, aluminium, their metal oxide, their insoluble hydroxide of metal and at least a mixture in their the insoluble metal salt.Wherein, insoluble hydroxide of metal recited above under a normal atmosphere, 20 ℃ the solubleness in water less than 0.1g/100cm
3Insoluble metal salt recited above under a normal atmosphere, 20 ℃ the solubleness in water less than 0.1g/100cm
3Specifically, described insoluble hydroxide of metal can be selected from ferrous hydroxide, ironic hydroxide, aluminium hydroxide and manganous hydroxide (Mn (OH)
2) in one or more; Described insoluble metal salt can be selected from one or more in Iron sulfuret, iron protocarbonate, cupric sulfide, cuprous sulfide, cobaltinitrite, nickelous carbonate, manganous carbonate, zinc carbonate, zinc sulphide and the silver chloride.In addition, described tool is magnetic, and can Catalytic Wet Oxidation waste water in organic granules of catalyst can also be commercially available, perhaps also can adopt the method for well known to a person skilled in the art to prepare.
Thereby realize the Catalytic Wet Oxidation of waste water is processed in order more to be beneficial to waste water and fully contacting of the magnetic granules of catalyst of tool, and considering cost and effect, under the preferable case, the method that described Catalytic Wet Oxidation is processed comprises: under the effect of externally-applied magnetic field, with waste water continuously organic granules of catalyst magnetic with the tool that suspends, in also can Catalytic Wet Oxidation waste water contact and waste water carried out Catalytic Wet Oxidation.The described catalytic time is not particularly limited, as long as can fully make the magnetic granules of catalyst of waste water and tool contact the organism in the waste water to be carried out Catalytic Wet Oxidation with the COD value of effective reduction waste water, the biodegradability of preferred Effective Raise waste water gets final product.Wherein, can be according to the different magnetic granules of catalyst of tool and the wet oxidation conditions suitably selected of the water quality of pending waste water; The selectable range of the liquid hourly space velocity of described waste water is wider, also can carry out suitable adjusting according to the difference of the size of the magnetic granules of catalyst of water quality, tool of waste water and wet oxidation condition and device.Under the preferable case, the liquid hourly space velocity of described waste water is 0.1-20h
-1, further under the preferable case, the liquid hourly space velocity of described waste water is 0.2-10h
-1, under the most preferred case, the liquid hourly space velocity of described waste water is 0.5-2h
-1In addition, the magnetic catalyzer of described tool can account for the 40-95% of reactor volume usually; Under the preferable case, the magnetic catalyzer of described tool accounts for the 60-85% of reactor volume.
According to a kind of preferred embodiment of the present invention, tool is magnetic, and the granules of catalyst of the organism wet oxidation in can catalysis waste water is suspended in the waste water, and waste water is carried out the mode that Catalytic Wet Oxidation processes be: under the effect of externally-applied magnetic field, tool is magnetic, and the organic granules of catalyst in can Catalytic Wet Oxidation waste water is suspended in, and (described reactor is made of the good material of magnetic permeability in the reactor, for example, stainless material), under the wet oxidation condition, pending waste water passed into from reactor bottom (waste water and oxygen-containing gas can pass into respectively, also can pass into simultaneously), waste water discharge after will processing gradually with the described granules of catalyst contact reacts that suspends, and from the top of reactor.
According to the present invention, described waste water can be various waste water, for example, printing and dyeing class waste water, paper waste, pharmacy waste water and petrochemical industry waste water etc., generally, the B/C of the described waste water of described waste water is＜0.3mg/L, for example, for more unmanageable waste water, its B/C can be 0-0.25mg/L; The COD value of described pending waste water is generally greater than 60mg/L, when processing high concentrated organic wastewater, adopts wet oxidation treatment process effect of the present invention better, and for example, the COD value can be 8000-500000mg/L.
The present invention is not limited to the detail in the above-mentioned embodiment, in technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, and these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characterictic described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible array modes.
In addition, also can carry out arbitrary combination between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
The below will further describe in detail embodiments of the invention.
Among the following embodiment, the measuring method of the COD of waste water is dichromate titration (GB11914-89), and the measuring method of the BOD of waste water is dilution inoculation method (GB/T 7488-1987).
The volume for cylindrical reactor, reactor of the magnetically stabilized bed reactor that adopts among the following embodiment is 2L, and the material of reactor adopts the 316L stainless steel, and 5 coils are arranged in the reactor outside, the number of turn 350 circles of each coil, and the spacing of coil is 30mm.
Embodiment 1
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
The waste water that the present embodiment is processed is the high concentrated organic wastewater of certain refinery.
Described waste water introduced continuously from the bottom that the magnetic that ferriferrous oxide particles (particle diameter is 150 microns) is housed is stablized reactor (loadings of ferriferrous oxide particles is 65% of reactor volume the reactor, and the liquid hourly space velocity of waste water is 1.5h
-1), in the coil that is wrapped in described reactor periphery, pass into electric current, so that the magneticstrength of additional electromagnetic field is 300 oersteds, described ferriferrous oxide particles is suspended in the waste water, and it is 260 ℃ in temperature, pressure is under the 4.2MPa, in reactor, pass into air, quality in oxygen, the amount of the air that passes into is to make 1.2 times of oxidation operation oxygen requirement theoretical value in the waste water, waste water is carried out wet oxidation, and the waste water after will processing is drawn the waste water after obtaining processing from described reactor head.Waste water quality index before and after processing is as shown in table 1.
Comparative Examples 1
This Comparative Examples is used for the reference method of explanation wastewater treatment.
Method according to embodiment 1 is processed waste water, different is, in the coil of reactor periphery, do not pass into electric current (namely not having additional electromagnetic field), directly waste water is passed in the magnetically stabilized bed reactor that ferriferrous oxide particles is housed, waste water is carried out wet oxidation.Waste water quality index before and after processing is as shown in table 1.
Table 1
| Water-quality guideline | COD(mg/L) | BOD(mg/L) | B/C |
| Before the processing | 9500 | 28 | 0 |
| Embodiment 1 | 320 | 125 | 0.39 |
| Comparative Examples 1 | 530 | 79.5 | 0.15 |
From the results shown in Table 1, adopt method of the present invention to process waste water and can significantly reduce the COD of waste water, and significantly improve the biodegradability of waste water.
Embodiment 2
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
The waste water that the present embodiment is processed is certain chemical plant wastewater.
Magnetic granules of catalyst preparation method is as follows for the tool that adopts in the present embodiment: with 65 % by weight iron protoxides (the iron protoxide particle diameter is the 2-10 micron), the cupric oxide of 22 % by weight (diameier is the 2-10 micron), 8 % by weight zinc oxide (diameier is the 2-10 micron), obtaining particle diameter in 2 hours at 500 ℃ of sintering after 3 % by weight magnesium oxide (diameier is the 2-10 micron) and 2 % by weight cerium oxide (diameier is the 2-10 micron) mix is 120 microns granules of catalyst.
Described waste water introduced continuously from the described bottom that the magnetically stabilized bed reactor of above-mentioned granules of catalyst is housed (the granules of catalyst loadings is 70% of reactor volume, and the liquid hourly space velocity of waste water is 0.5h
-1), in the coil that is wrapped in described reactor periphery, pass into electric current, so that the magneticstrength of additional electromagnetic field is 500 oersteds, described granules of catalyst is suspended in the waste water, and it is 160 ℃ in temperature, pressure is under the 2.5MPa, in reactor, pass into air, quality in oxygen, the amount of the air that passes into is to make 1.1 times of oxidation operation oxygen requirement theoretical value in the waste water, waste water is carried out wet oxidation, and the waste water after will processing is drawn the waste water after obtaining processing from described reactor head.Waste water quality index before and after processing is as shown in table 2.
Comparative Examples 2
This Comparative Examples is used for the reference method of explanation wastewater treatment.
Method according to embodiment 2 is processed waste water, different is, in the coil of reactor periphery, do not pass into electric current (namely not having additional electromagnetic field), directly waste water is passed in the magnetically stabilized bed reactor that the magnetic granules of catalyst of described tool is housed, waste water is carried out wet oxidation.Waste water quality index before and after processing is as shown in table 2.
Table 2
| Water-quality guideline | COD(mg/L) | BOD(mg/L) | B/C |
| Before the processing | 17680 | 36 | 0 |
| Embodiment 2 | 167 | 82 | 0.49 |
| Comparative Examples 2 | 1350 | 225 | 0.16 |
From the results shown in Table 2, adopt method of the present invention to process waste water and can significantly reduce the COD of waste water, and significantly improve the biodegradability of waste water.
Embodiment 3
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Method according to embodiment 1 is processed waste water, and different is that the magneticstrength of additional electromagnetic field is 800 oersteds; The COD value of processed waste water is 312mg/L, and the BOD value is 132mg/L, and B/C is 0.42.
Embodiment 4
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Method according to embodiment 1 is processed waste water, and different is that the loadings of the magnetic granules of catalyst of tool is 75% of reactor volume.The COD value of processed waste water is 309mg/L, and the BOD value is 134mg/L, and B/C is 0.43.
Embodiment 5
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Method according to embodiment 1 is processed waste water, and different is that the liquid hourly space velocity of waste water is 2h
-1The COD value of processed waste water is 358mg/L, and the BOD value is 112mg/L, and B/C is 0.31.
Embodiment 6
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Method according to embodiment 1 is processed waste water, different is, the temperature of wet oxidation is 180 ℃, pressure is 3.8MPa, passes into air in reactor, in the quality of oxygen, the amount of the air that passes into is to make 1.5 times of oxidation operation oxygen requirement theoretical value in the waste water, the COD value of processed waste water is 545mg/L, and the BOD value is 164mg/L, and B/C is 0.30.
Embodiment 7
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Method according to embodiment 1 is processed waste water, different is that magnetic granules of catalyst preparation method is as follows for the tool that adopts in the present embodiment: obtaining particle diameter in 2 hours at 550 ℃ of sintering after the ironic hydroxide powder (diameier is the 5-10 micron) of the nickel oxide (diameier is the 5-10 micron) of the cobalt oxide powder (diameier is the 5-10 micron) of 40 % by weight, 35 % by weight and 25 % by weight is mixed is 200 microns granules of catalyst.The COD value of processed waste water is 252mg/L, and the BOD value is 108mg/L, and B/C is 0.43.
Embodiment 8
The present embodiment is used for illustrating the treatment process of waste water provided by the invention.
Process waste water according to the method for embodiment 1, different is, the temperature of wet oxidation is 320 ℃, and pressure is 5MPa, and the COD value of processed waste water is 260mg/L, and the BOD value is 104mg/L, and B/C is 0.4.
BOD/COD accounts for whole organic shares than biodegradable organism in the value representation waste water, and the biodegradable degree of this waste water.Can find out from the result of embodiment 1 to embodiment 8, adopt method of the present invention can significantly reduce the COD value of processed waste water and improve the ratio of the B/C of processed waste water, and the treatment effect of waste water is more stable.Can find out with the contrast of embodiment 8 from embodiment 1, adopt Catalytic Wet Oxidation method of the present invention, even carry out wet oxidation under lower temperature, pressure, treatment effect is still better.
Claims (9)
1. the treatment process of a waste water is characterized in that, the method is included under the effect in magnetic field, tool is magnetic, and can Catalytic Wet Oxidation waste water in organic granules of catalyst be suspended in the waste water, waste water is carried out Catalytic Wet Oxidation processes.
2. method according to claim 1, wherein, describedly waste water is carried out the method that Catalytic Wet Oxidation processes comprise: under the effect of externally-applied magnetic field, with waste water continuously organic granules of catalyst magnetic with the tool that suspends, in also can Catalytic Wet Oxidation waste water contact and waste water carried out Catalytic Wet Oxidation, the liquid hourly space velocity of described waste water is 0.1-20h
-1
3. method according to claim 2, wherein, the liquid hourly space velocity of described waste water is 0.2-10h
-1, 0.5-2h more preferably
-1
4. method according to claim 1 and 2, wherein, the magneticstrength in described magnetic field is the 10-2000 oersted, is preferably the 100-1000 oersted.
5. method according to claim 1 and 2, wherein, the particle diameter of described granules of catalyst is the 0.1-2000 micron, is preferably the 2-1000 micron.
6. method according to claim 1 and 2, wherein, described granules of catalyst accounts for the 40-95% of reactor volume.
7. method according to claim 1 and 2, wherein, described tool magnetic, and can Catalytic Wet Oxidation waste water in organic catalyzer chosen from Fe, cobalt, nickel, they metal oxide, they insoluble hydroxide of metal and their insoluble metal salt at least a; Perhaps chosen from Fe, cobalt, nickel, they metal oxide, they insoluble hydroxide of metal and their insoluble metal salt at least a be selected from manganese, copper, zinc, titanium, silver, aluminium, their metal oxide, their insoluble hydroxide of metal and at least a mixture in their the insoluble metal salt.
8. method according to claim 1 and 2, wherein, the wet oxidation condition comprises that temperature is 100-300 ℃, and pressure is 1-15MPa, in the quality of oxygen in the oxygen-containing gas, the amount that passes into the oxygen-containing gas in the waste water be make the oxidation operation oxygen requirement theoretical value in the waste water 1-3 doubly.
9. method according to claim 8, wherein, the wet oxidation condition comprises that temperature is 120-260 ℃, and pressure is 1.5-10MPa, in oxygen quality in the oxygen-containing gas, the amount that passes into the oxygen-containing gas in the waste water be make the oxidation operation oxygen requirement theoretical value in the waste water 1.05-1.5 doubly.
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| CN104043458A (en) * | 2014-06-27 | 2014-09-17 | 北京林业大学 | Preparation of magnetic nano ferromanganese oxyhydroxide and application of magnetic nano ferromanganese oxyhydroxide in catalytic ozonation to remove pollution |
| CN104069860A (en) * | 2014-06-27 | 2014-10-01 | 北京林业大学 | Preparation of magnetic nano copper-iron oxyhydroxide and application thereof to pollution removal by catalytic ozonation |
| CN106045185A (en) * | 2016-07-21 | 2016-10-26 | 博天环境工程（北京）有限公司 | Wastewater treatment method |
| CN106565010A (en) * | 2016-10-18 | 2017-04-19 | 哈尔滨工业大学 | Method for treating organic pollutants in water |
| CN108503000A (en) * | 2018-04-09 | 2018-09-07 | 嘉兴市叁壹工程检测有限公司 | A method of processing mercury-containing waste water |
| CN112779147A (en) * | 2020-12-23 | 2021-05-11 | 广西大学 | Method and device for measuring micro mass transfer and biochemical reaction process of microorganism aggregate in fluidized state |
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