CN109879498A - The biodegrading process of N-Nitrosodimethylamine in polluted underground water - Google Patents
The biodegrading process of N-Nitrosodimethylamine in polluted underground water Download PDFInfo
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- CN109879498A CN109879498A CN201910179119.2A CN201910179119A CN109879498A CN 109879498 A CN109879498 A CN 109879498A CN 201910179119 A CN201910179119 A CN 201910179119A CN 109879498 A CN109879498 A CN 109879498A
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Abstract
The invention discloses a kind of biodegrading process of N-Nitrosodimethylamine in polluted underground water, it is related to special equipment in this method, its structure includes: pipe-line mixer, the polluted underground water to come up is extracted in the first end input of the pipe-line mixer, the second end of the pipe-line mixer inputs hydrogen peroxide, the mixed liquor of polluted underground water and hydrogen peroxide described in the three-polar output of the pipe-line mixer；Reactor, the cylindrical reaction chamber that the reactor is equipped with the input port being connected to the third end of the pipe-line mixer, the delivery outlet for discharging liquid after the completion of reaction and the input port, delivery outlet are connected to, motor is provided on reactor, blade is fixedly connected in the shaft of the motor, blade is arranged inside the reaction chamber, several ultraviolet lamps are additionally provided on the reactor, ultraviolet lamp is uniformly distributed inside the reaction chamber.Method of the invention efficiently can easily remove the N-Nitrosodimethylamine in polluted underground water.
Description
Technical field
The invention belongs to N-Nitrosodimethylamines to pollute process field, and in particular to the Asia N- in a kind of processing polluted underground water
The biodegrading process of nitrodimethylamine.
Background technique
N-Nitrosodimethylamine is a kind of industrial and environmental contaminants, has carcinogenic, teratogenesis and mutagenic toxicity, target device
Official is mainly liver and kidney.In recent years, in potable water treatment plants and the disinfecting process of sewage treatment plant, it is frequently as a kind of disinfection
By-product occurs, and causes the highest attention of people.N-Nitrosodimethylamine will cause under extremely low concentration (0.69 ng/L)
Cancer is classified as 2A class by international cancer research institution (IARC)；N-Nitrosodimethylamine is 2A class, such substances on human's carcinogenicity
Evidence is limited and experimental animal carcinogenicity is sufficient evidence.
For a long time, cholorination is because its is low in cost, operational management is simple and has extensive inactivation to pathogenic microorganisms
Characteristic is still in a dominant position in current wastewater land treatment.However, finding cholorination since the 1970s
Often generate some by-products harmful to health, such as haloform, halogen acetic acid, MX etc..In recent years, with environment measuring hand
The continuous development of section, a kind of novel disinfection by-products --- N-Nitrosodimethylamine is often detected in recycle-water,
Mass concentration is sometimes up to 0.1 μ g/L.Some industrial sites are deposited because of recycle-water or its production technology that cholorination is used for a long time
In the link for generating N-Nitrosodimethylamine, leading to place underground water, there are N-Nitrosodimethylamine pollutions.N- nitroso diformazan
Amine belongs to strong carcinogen nitrosamine one kind, and carcinogenicity is much higher than routine disinfections by-products such as haloforms.Therefore, have very much
Necessity studies its minimizing technology.
Air lift is relatively good to the biggish organic matter effect of Henry's constant, and the Henry's constant of N-Nitrosodimethylamine is lower,
Therefore air lift cannot remove N-Nitrosodimethylamine from solution well.The relatively low vapour pressure of N-Nitrosodimethylamine
But also it is difficult to volatilize naturally from water body.In addition studies have shown that N-Nitrosodimethylamine tolerance acid and hydrolysis, metal network
Conjunction, general chemistry oxidation are also little to its removal effect.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides N-Nitrosodimethylamine in a kind of processing polluted underground water
Degradation equipment and method, the present invention can efficiently remove the N-Nitrosodimethylamine in polluted underground water.
To achieve the above object, the invention adopts the following technical scheme:
The present invention also provides a kind of biodegrading process of N-Nitrosodimethylamine in processing polluted underground water, and the method includes following
Step: Step 1: extracting polluted underground water；Step 2: the polluted underground water extracted and reactant are mixed to form mixed liquor；
Step 3: mixed liquor is placed in reactor；Step 4: generating stirring vortex in the reactor, while being irradiated using ultraviolet light
Mixed liquor；Step 5: mixed liquor is discharged in autoreactor.
It is related to a kind of degradation equipment for handling N-Nitrosodimethylamine in polluted underground water, the equipment in the above method
It include: pipe-line mixer, the polluted underground water to come up, the pipe-line mixer are extracted in the first end input of the pipe-line mixer
Second end input hydrogen peroxide, the mixed liquor of polluted underground water and hydrogen peroxide described in the three-polar output of the pipe-line mixer；
Reactor, the reactor are equipped with the input port being connected to the third end of the pipe-line mixer, are used to after the completion of reaction
The cylindrical reaction chamber that the delivery outlet of discharge liquid is connected to the input port, delivery outlet, the reactor are FRP material
Or stainless steel material, motor is provided on the reactor, and blade, the blade are fixedly connected in the shaft of the motor
It is arranged inside the reaction chamber, several ultraviolet lamps is additionally provided on the reactor, the ultraviolet lamp is uniformly distributed described
Inside reaction chamber.
Preferably, the equipment further includes dioxygen water storage tank, and the second of the dioxygen water storage tank and the pipe-line mixer
End connection.
Preferably, metering pump is in series between the dioxygen water storage tank and the second end of the pipe-line mixer.
Preferably, the equipment further include: water inlet line pump, the water inlet line pump and the first of the pipe-line mixer
End connection, for extracting polluted underground water.
Preferably, the reactor is cylindrical shell, and the reactor is 316 stainless steel materials, the input port setting
At the top of the reactor, the bottom of the reactor is arranged in the delivery outlet, and the motor is arranged in the reactor
Top, the shaft of the motor is fixedly connected by connecting rod with the blade, and the reactor is arranged in the blade
Bottom.
Preferably, the ultraviolet lamp is cylindric, and the first end of the ultraviolet lamp is fixed on the reactor head, described
The second end of ultraviolet lamp extends to the bottom of the reactor.
Preferably, the quantity of the ultraviolet lamp is 6, and the ultraviolet lamp is laid around the connecting rod, the ultraviolet lamp
Luminous minister 2m, power 150w, ultraviolet wavelength 200-250nm.
Preferably, the minimum range of the ultraviolet lamp and reactor inner sidewall is equal to the ultraviolet lamp and the connecting rod
Minimum range.
Preferably, the reactant is hydrogen peroxide.
Compared with prior art, the method for the present invention and equipment achieve in practice has the beneficial effect that as follows
1. biodegrading process of the invention is using the proportion with polluted underground water of metering pump control hydrogen peroxide, for various concentration
N-Nitrosodimethylamine, the additional proportion of adjustable hydrogen peroxide, thus reach optimal removal N-Nitrosodimethylamine effect,
Excessive hydrogen peroxide will not be generated simultaneously, economical and efficient is adaptable.
2. the input port setting of the degradation equipment in the present invention is on top, blade setting is in lower part, so that the stirring generated
Vortex can preferably make hydrogen peroxide contact with N-Nitrosodimethylamine reaction, improve decontamination efficiency, and motor is arranged upper
Portion simplifies device without the concern for the sealing at shaft, guarantees Electrical Safety.
3. ultraviolet lamp is arranged around connecting rod in the degradation equipment in the present invention, uniformly distributed in reaction chamber, so that purple
The irradiation discomposing effect of outside line is stronger.
4. reactor storage tank uses 316 stainless steel material in the degradation equipment in the present invention, storage tank side wall has reflection
Ultraviolet light, the benefit for improving reaction efficiency.
5. the biodegrading process in the present invention can effectively and quickly remove the N-Nitrosodimethylamine in polluted underground water,
So as to improve space enrironment pollution, residents ' health risk is reduced.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the overall structure diagram of the degradation equipment of N-Nitrosodimethylamine in polluted underground water of the present invention.
Fig. 2 is the side view of reactor in the degradation equipment of N-Nitrosodimethylamine in polluted underground water of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
The embodiment of the present invention also provides a kind of biodegrading process for handling N-Nitrosodimethylamine in polluted underground water, the party
Method is operated using above-mentioned dedicated degradation equipment expansion, specifically includes the following steps:
Step 1: extracting polluted underground water；
Step 2: the polluted underground water extracted and reactant are mixed to form mixed liquor；
Step 3: mixed liquor is placed in reactor 7；
Step 4: generating stirring vortex in reactor 7, while mixed liquor is irradiated using ultraviolet light, stirring irradiation reaches certain
Time, specific time can obtain according to estimating or constantly testing adjustment, be lower than one with the content of N-Nitrosodimethylamine
Determining threshold value is accuracy；
Step 5: mixed liquor is discharged in autoreactor 7.
Reactant is oxidant in the above method, for example, Peracetic acid, sodium dichromate, chromic acid, nitric acid, potassium permanganate, mistake
Ammonium sulfate, further, it is preferable to be hydrogen peroxide.
As shown in Figure 1, the present invention handle polluted underground water in N-Nitrosodimethylamine biodegrading process mainly there is provided
A kind of dedicated degradation equipment includes in the special equipment structure: pipe-line mixer 2, the first end input of pipe-line mixer 2
The polluted underground water to come up is extracted, the second end of pipe-line mixer 2 inputs hydrogen peroxide, and the three-polar output of pipe-line mixer 2 is dirty
Contaminate the mixed liquor of underground water and hydrogen peroxide；Reactor 7, reactor 7 are equipped with the input being connected to the third end of pipe-line mixer
Mouthfuls 71, for discharging the cylindrical reaction chamber that the delivery outlet 72 of liquid is connected to input port, delivery outlet after the completion of reaction,
It is provided with motor 6 on reactor 7, blade 8 is fixedly connected in the shaft of motor 6, blade 8 is arranged inside reaction chamber, reaction
Several ultraviolet lamps 5 are additionally provided on device 7, ultraviolet lamp 5 is uniformly distributed inside reaction chamber.
It further include dioxygen water storage tank 4 in the structure design aspect degradation equipment, the of dioxygen water storage tank 4 and pipe-line mixer
The connection of two ends.More optimally, metering pump 3 is in series between dioxygen water storage tank 4 and the second end of pipe-line mixer.Metering pump 3
It is one kind of fluid conveying machine, outstanding feature is can to keep the constant flow rate unrelated with discharge pressure.Use metering pump
It can be completed at the same time the function of conveying, metering and adjusting, to simplify the technological process of production.Using more metering pumps, can incite somebody to action
Several media are inputted in process flow by actual ratio and are mixed.
The degradation equipment further includes having in structure: water inlet line pump 1, water inlet line pump 1 and the first of pipe-line mixer
End connection, for extracting polluted underground water.The first valve is connected between water inlet line pump 1 and pipe-line mixer.Metering pump with
The second valve is connected between pipe-line mixer.
As shown in Fig. 2, the reactor 7 is cylindrical shell, reactor 7 is FRP material or stainless steel material, anti-
The top of device 7 is answered to be equipped with input port, and the bottom of reactor 7 is arranged in delivery outlet, the top of reactor 7 is arranged in motor 6, electricity
The shaft of machine 6 is fixedly connected by connecting rod 61 with blade 8, and blade 8 is in the bottom position of reactor 7.Storage tank is vertical, fibre
Dimension enhancing composite material (Fiber Reinforced Polymer/Plastic, abbreviation FRP), tank skin structural behaviour is excellent: fine
Dimension fw frp can change resin system or reinforcing material, the needs of Lai Shiying different medium and operating condition.Pass through knot
Structure thickness degree, winding angle and wall thickness structure and design adjust the bearing capacity of tank body, and different pressure levels or certain are made
The fiberglass-reinforced glass storage tank of property and non-device for mark, this is that isotropic metal material can not be in contrast.Hydrogen peroxide storage
Usually using No. 304 steel or No. 316 steel when tank uses stainless steel material, further, had using No. 316 steel preferably anti-
Penetrate the effect of ultraviolet light.
Ultraviolet lamp 5 be it is cylindric, the first end of ultraviolet lamp 5 is fixed on the top of reactor 7, and the second end of ultraviolet lamp 5 is to anti-
The bottom of device 7 is answered to extend.The length of the illumination region of ultraviolet lamp is more than the 3/4 of reaction chamber longitudinal length.The height of blade is lower than purple
The height of the second end of outer lamp.The blade quantity of blade is 2-6.
The quantity of ultraviolet lamp 5 is 6, and ultraviolet lamp 5 is laid around connecting rod, luminous minister 2m, the power of ultraviolet lamp 5
150w, ultraviolet wavelength 200-250nm.
The minimum range of ultraviolet lamp 5 and 7 inner sidewall of reactor is equal to the minimum range of ultraviolet lamp 5 and connecting rod.
Although above-described embodiment makes specific descriptions to the present invention, come for those of ordinary skill in the art
It says, it is understood that can be modified within spirit and scope of the invention based on present disclosure not departing from
Or improve, these modification and improvement are all within spirit and scope of the invention.
Claims (9)
1. the biodegrading process of N-Nitrosodimethylamine in a kind of polluted underground water, which is characterized in that this method is dedicated using one kind
Degradation equipment realize the degradation of N-Nitrosodimethylamine in polluted underground water, include in the dedicated degradation equipment structure:
The polluted underground water to come up, the pipeline are extracted in the first end input of pipe-line mixer (2), the pipe-line mixer (2)
The second end of mixer (2) inputs hydrogen peroxide, polluted underground water and dioxygen described in the three-polar output of the pipe-line mixer (2)
The mixed liquor of water；
Reactor (7), the reactor (7) are equipped with the input port (71) being connected to the third end of the pipe-line mixer, use
To discharge the cylindrical reaction chamber that the delivery outlet (72) of liquid is connected to the input port, delivery outlet, institute after the completion of reaction
Stating reactor (7) is FRP material or stainless steel material, is provided with motor (6) on the reactor (7), the motor (6)
It is fixedly connected in shaft blade (8), the blade (8) is arranged inside the reaction chamber, also sets up on the reactor (7)
Have several ultraviolet lamps (5), the ultraviolet lamp (5) is uniformly distributed inside the reaction chamber；
It the described method comprises the following steps:
Step 1: extracting polluted underground water；
Step 2: the polluted underground water extracted and reactant are mixed to form mixed liquor；
Step 3: mixed liquor is placed in reactor (7)；
Step 4: generating stirring vortex in reactor (7), while mixed liquor is irradiated using ultraviolet light；
Step 5: mixed liquor is discharged in autoreactor (7).
2. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 1, which is characterized in that described
Reactant in step 2 is hydrogen peroxide.
3. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 1, which is characterized in that described
It further include dioxygen water storage tank (4) in degradation equipment, the dioxygen water storage tank (4) is connected to the second end of the pipe-line mixer.
4. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 3, which is characterized in that described
Metering pump (3) are in series between dioxygen water storage tank (4) and the second end of the pipe-line mixer.
5. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 1, which is characterized in that described
In degradation equipment further include:
Water inlet line pumps (1), and the water inlet line pump (1) is connected to the first end of the pipe-line mixer, for extracting pollution
Underground water.
6. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 1, which is characterized in that described
Reactor (7) is cylindrical shell, and the reactor (7) is made of 316 stainless steels, and the input port is arranged in the reactor
(7) top, in the bottom of the reactor (7), the motor (6) is arranged in the reactor (7) for the delivery outlet setting
Top, the shaft of the motor (6) is fixedly connected by connecting rod (61) with the blade (8), and the blade (8), which is arranged, to be existed
The bottom of the reactor (7).
7. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 6, which is characterized in that described
Ultraviolet lamp (5) be it is cylindric, the first end of the ultraviolet lamp (5) is fixed at the top of the reactor (7), the ultraviolet lamp (5)
Second end to the bottom of the reactor (7) extend.
8. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 7, which is characterized in that described
The quantity of ultraviolet lamp (5) is 6, and the ultraviolet lamp (5) is laid around the connecting rod, the luminous minister of the ultraviolet lamp (5)
2m, power 150w, ultraviolet wavelength 200-250nm.
9. the biodegrading process of N-Nitrosodimethylamine in polluted underground water according to claim 8, which is characterized in that described
The minimum range of ultraviolet lamp (5) and reactor (7) inner sidewall is equal to the minimum range of the ultraviolet lamp (5) and the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179119.2A CN109879498A (en) | 2019-03-11 | 2019-03-11 | The biodegrading process of N-Nitrosodimethylamine in polluted underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179119.2A CN109879498A (en) | 2019-03-11 | 2019-03-11 | The biodegrading process of N-Nitrosodimethylamine in polluted underground water |
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| CN109879498A true CN109879498A (en) | 2019-06-14 |
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| CN201910179119.2A Pending CN109879498A (en) | 2019-03-11 | 2019-03-11 | The biodegrading process of N-Nitrosodimethylamine in polluted underground water |
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| EP2142479A1 (en) * | 2007-04-19 | 2010-01-13 | Applied Process Technology, Inc. | Process and apparatus for water decontamination |
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Application publication date: 20190614 |