CN109867347A - A kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone and method - Google Patents
A kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone and method Download PDFInfo
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Abstract
A kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone and method, repair system has 1~3 mouthful of injection well that Polluted area direction of groundwater flow upstream position is arranged in, the pumped well of Polluted area direction of groundwater flow downstream position is set, 2~4 mouthfuls of upward monitoring wells of subsurface flow are set, drinking-water pipe and suction pump, the micro-nano bubble preparation system of ozone, catalyst injection device, connect the water outlet of the micro-nano bubble preparation system of the ozone and the air supply pipe of catalyst injection device, the control valve being installed on air supply pipe, with injection well corresponding 1~3 water injection pipe one by one.The micro-nano bubble preparation system of ozone has pressure bottle, ozone generator and the micro-nano bubble generator being successively linked in sequence.The present invention also provides a kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation methods of ozone.It is high-efficient to ammonia nitrogen pollutant oxidative degradation, and decomposition rate is fast, and removal thoroughly, will not generate secondary pollution, low in cost, simple and easy to do.
Description
Technical field
The present invention relates to a kind of underground water pollution repair system, specifically a kind of micro-nano bubble underground water ammonia nitrogen of ozone is dirty
In-situ remediation system is contaminated, the invention further relates to a kind of underground water pollution restorative procedure, specifically a kind of micro-nano bubble of ozone
It is lauched ammonia and nitrogen pollution in-situ remediation method, belongs to field of underground water pollution repair.
Background technique
Underground water is important resource of water supply, wherein ammonia nitrogen be China most cities underground water major pollutants it
One, the especially north have showed expansion trend from point to surface.Ammonia nitrogen can make water body generate pungent smell, and certain
Under the conditions of can be converted into carcinogen nitrite, to seriously affect Water quality.
In the groundwater environment of relative reduction, ammonia nitrogen is difficult that conversion and removal occurs.Conventional recovery technique is such as taken out
Processing technique out, can be due to height adsorptivity of the ammonia nitrogen in anaerobic condition and there are serious tailing problem, biological prosthetic skills
Art can be ineffective since nitrifier inactivates when encountering behavior of high-strength ammonium, and easy-to-use gas phase extracting can be due to ammonia nitrogen
High water soluble and inefficiency；Permeable reaction wall technology is then difficult to carry out under the conditions of aqueous layer depth is biggish.
In recent years, in situ chemical oxidation technology is sent out extensively because reaction is thorough, the reaction time is short, cost is relatively low for it
Exhibition, hydrogen peroxide, persulfate, potassium permanganate and ozone are common oxidants.Wherein ozone because have very strong oxidation,
Ammonia nitrogen pollutant can be aoxidized using the hydroxyl radical free radical generated in reaction, ammonia nitrogen pollutant can be made under the effect of the catalyst
It is fully converted to nitrogen, any polluter will not be introduced.But current ozone is after injecting in water-bearing layer generally with grade grain
The independent air bubble form of diameter moves, and bubble diffusional resistance is big, and the duration is short, and coverage is smaller, and remediation efficiency is in urgent need to be improved.
And micro-nano bubble diameter is small, mass transfer ability is strong, there are the time is long, can make up the limitation of existing based technique for in-situ remediation.
Inventor retrieves following Patents documents: CN102583712A disclose it is a kind of with micro-nano bubble to pollution
Water injection well is arranged in the upstream position that underground water is pollutant-contaminated region in the method and system of underground enhanced water in-situ immobilization,
It is passed through the micro-nano air-bubble containing nutritive salt thereto；Micro-nano air-bubble containing nutritive salt moves to contaminated area with Groundwater Flow
Domain, decomposing pollutant or for microorganisms supplement electron acceptor/donor, promote the degradation of organic pollutant to remove；It sets simultaneously
It sets pumped well to draw water in Polluted area downstream, forms ground water field；It is each during removal organic polluter to going by monitoring well
Parameter carries out real-time monitoring and analysis, adjusts the time of origin and aeration quantity of micro-nano bubble.CN104140153A discloses one
Kind using nanotechnology repair rock stratum environmental pollution device and application, on the direction that water injection well is flowed along subsurface flow between
5~10m is provided with pumped well, is provided with strainer in water injection well and pumped well, is set on the ground between water injection well and pumped well
Be equipped with a nano bubble saturated solution fill assembly, the nano bubble saturated solution fill assembly respectively with water injection well and pumped well
Piping connection, rock stratum environmental pollution is handled by nano bubble saturated solution.CN103145232A discloses one kind
With micro-nano bubble to the method and system of underground water in-situ immobilization, in underground water by the upstream position of organic pollutant Polluted area
Water injection well is installed, micro-nano aeration device is placed in water injection well, by solar power supply apparatus or storage battery power supply, and is led to
It crosses long-range wireless communication apparatus and remote monitoring and control is realized on ground；Air is contained with water by micro-nano aeration device generation
The water of micro-nano bubble, into ground water regime, direct decomposing organic pollutant or for microorganisms supplement electron acceptor,
Promote the degradation removal of organic pollutant；Monitoring well is set simultaneously to going each parameter during removal organic polluter to be supervised in real time
It surveys and analyzes, and based on the analysis results, time of origin, inflow and the aeration quantity of the micro-nano bubble of remote adjustment.
CN105731628A discloses a kind of in situ chemical oxidation repair system and method for the pollution of underground water chlorohydrocarbon, the system
System includes: ozone preparation system, the soaked preparation system of micro-nano ozone gas, hardening agent injected system, gas sampling processing system
And underground injection, monitoring and extract system, pass through pipe between ozone preparation system and the soaked preparation system of micro-nano ozone gas
Road connection, gas sampling processing system and underground extract system pass through piping connection；The micro-nano soaked preparation system of ozone gas and
Hardening agent injected system passes through piping connection into downhole injection system, the underground water that in-situ treatment is polluted by chlorohydrocarbon.Also it mentions
The application method of the processing system is supplied.The present invention is used for the groundwater remediation of chlorohydrocarbon pollution, increases substantially reparation effect
Rate；Removableization uses, and controller is placed in container, it can be achieved that automating.
Existing micro-nano bubbler techniques have been used to remove organic pollutant and heavy metal in underground water, and there are no needles
To the micro-nano bubble removal technology of ammonia nitrogen.Due to needing to carry out accuracy controlling when ammonium oxidation with convert it to nitrogen without
It is converted into nitrate, the prior art can not be used for oxidation removal ammonia nitrogen.
How the above technology is for make the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone to ammonia nitrogen
Pollutant oxidative degradation is high-efficient, decomposition rate is fast, removal is thorough, does not provide specific guidance program.
Summary of the invention
Technical problem to be solved by the present invention lies in it is in situ to provide a kind of micro-nano bubble underground water ammonia nitrogen pollution of ozone
Repair system, it is high-efficient to ammonia nitrogen pollutant oxidative degradation, and decomposition rate is fast, and removal thoroughly, will not generate secondary pollution, at
This is cheap, simple and easy to do.
For this purpose, the technical problems to be solved by the invention also reside in, a kind of micro-nano bubble underground water ammonia nitrogen of ozone is provided
Pollute in-situ remediation method.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of micro-nano bubble of ozone (OMNB) underground water ammonia nitrogen pollution in-situ remediation system has and is arranged in Polluted area
1~3 mouthful of injection well of direction of groundwater flow upstream position, is set the pumped well that Polluted area direction of groundwater flow downstream position is arranged in
It sets in upward 2~4 mouthfuls of monitoring wells (monitoring well of subsurface flow upwards is arranged in communicate with earth's surface) of subsurface flow, drinking-water pipe
And suction pump, its technical solution is that the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of the ozone also has
The micro-nano bubble preparation system of ozone, catalyst injection device, the water outlet for connecting the micro-nano bubble preparation system of ozone
It is infused for corresponding 1~3 one by one with the air supply pipe of catalyst injection device, the control valve being installed on air supply pipe, with injection well
Water pipe, the micro-nano bubble preparation system of ozone have pressure bottle, ozone generator and the micro-nano gas being successively linked in sequence
Generator is steeped, pressure bottle is connected with ozone generator by the first air supply pipe, ozone generator and micro-nano bubble generator
It is connected by the second air supply pipe；It is equipped with suction pump (below suction pump water water level located underground) in the pumped well, pumped well
It is drawn water by suction pump, forms ground water field, the underground water of extraction is transported to the micro-nano bubble of ozone by drinking-water pipe and prepares
System, as the carrier fluid of micro-nano bubble, to improve remediation efficiency and prevent pollution range from expanding.The micro-nano bubble hair
One end of raw device is equipped with water inlet and air inlet, and the other end is equipped with water outlet, the water inlet and pumping of micro-nano bubble generator
The water outlet of water pump is connected by drinking-water pipe, and the micro-nano bubble water out of water outlet, that is, ozone of micro-nano bubble generator is logical
It crosses air supply pipe to be connected with catalyst injection device, injection well progress catalyst injection and the micro-nano bubble of ozone is injected
The upper end of (each) water injection pipe is connected with air supply pipe, and the bottom end of (each) water injection pipe is passed through and injects into well (and water located underground
Below water level), the control valve on air supply pipe is installed between water injection pipe and catalyst injection device, in this way, ozone micro-nano
Rice air-bubble, catalyst (sodium bromide) are passed through injection well by water injection pipe, and catalyst is for strengthening the micro-nano bubble of ozone
Oxidation effectiveness.
In above-mentioned technical proposal, preferred technical solution be can be, the pressure in the above-mentioned micro-nano bubble preparation system of ozone
Power bottle is industrial grade oxygen gas cylinder；The gas flowmeter to record gas production is provided on the air supply pipe.
A kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone, it is micro- using ozone described in (use)
Nano bubble underground water ammonia nitrogen pollution in-situ remediation system, it is characterised in that the micro-nano bubble underground water ammonia nitrogen pollution of ozone is in situ
Restorative procedure includes the following steps:
1~3 mouthful of injection well is arranged by the region upstream position of ammonia and nitrogen pollution in underground water, under the region in the first step
It swims position and 1 mouthful of pumped well is set, and set up 2~4 mouthfuls of monitoring wells in the local ground watering stream；
Second step is drawn water using suction pump in pumped well, and ground water field is formed, and speed of drawing water passes through control injection flow velocity
It simulates to obtain by software；
Third step opens ozone generator, the oxygen in pressure bottle is input in ozone generator, generates ozone；
The ozone that the underground water of step 2 extraction and step 3 generate is passed through micro-nano bubble simultaneously and occurred by the 4th step
Device forms the micro-nano air-bubble of ozone；
5th step is injecting setting while the micro-nano air-bubble of the ozone that step 4 is prepared injects underground
Control valve above well is opened, and the catalyst sodium bromide in catalyst injection device is passed through together with the micro-nano air-bubble of ozone
Water injection pipe in injection well injects underground, spreads the micro-nano bubble of ozone with the movement of underground water, decomposes ammonia nitrogen pollutant；
6th step is adjusted micro- using bromination sodium content in the palliating degradation degree and underground water of monitoring well monitoring ammonia nitrogen pollutant
Nano bubble injects duration (time) and sodium bromide implantation concentration (injection rate), judges the reparation degree of underground water ammonia nitrogen pollution.
In above-mentioned technical proposal, preferred technical solution be can be, and the pressure bottle is industrial grade oxygen gas cylinder, oxygen purity
>=99%；The ozone generator uses circulating water, external source of oxygen, and micro computer automatically controls, without artificial on duty, production
Raw ozone concentration (degree) >=5%.The bubble diameter that above-mentioned micro-nano bubble generator generates is in 200nm~4 μm
Between, bubble inclusion rate is 84%~90%.
In above-mentioned steps five, the implantation concentration of catalyst sodium bromide adds content and bromine content in underground water and micro-nano
Ozone content is related in air-bubble, and the implantation concentration (injection rate) of catalyst sodium bromide is calculated as follows formula and determines:In formula: C (Br-) be injection well initial bromide ion add it is dense
Degree, unit mg/L, i.e., the content of sodium bromide in the micro-nano air-bubble of every liter of ozone of injection underground；C(O3)Micro-nano air-bubbleIt is micro-
Nano bubble Measuring Ozone Concentration in Water, unit mg/L；C(Br-)Underground waterFor bromide ion concentration in underground water, unit mg/L.With
The progress of recovery technique, bromide ion concentration can gradually rise in underground water, and concentration is added needed for inlet and is reduced therewith.Catalyst
The flow velocity (injection flow velocity) that sodium bromide passes through the injection of the water injection pipe in injection well underground together with the micro-nano air-bubble of ozone should be controlled
In 0.5-1m/h, inject flow and injection flow velocity can be used groundwater Numerical Simulation software and determines system.In above-mentioned steps five, catalysis
The flow velocity that agent sodium bromide passes through the injection of the water injection pipe in injection well underground together with the micro-nano air-bubble of ozone can control in 1m/
H, the total injection rate that catalyst sodium bromide injects underground together with the micro-nano air-bubble of ozone can be 6m3, injection flow can be with
For 36-78L/h, it is 5.4mg/L that the catalyst sodium bromide being initially injected into, which adds content, i.e. every liter of ozone of injection underground is micro-nano
Contain 5.4 milligrams of sodium bromide in air-bubble.Above data value show that data value is not according to the application example 1 of this specification
Uniquely (depending on place hydrological geological conditions and pollution level).
The present invention provides a kind of underground water ammonia nitrogen pollution based technique for in-situ remediation based on the micro-nano bubbler techniques of ozone (to be
System and method), the technology using concentration 5% or more ozone as micro-nano bubble gas source, and sodium bromide conduct is added
Catalyst, and by the control to ground water field, form the in-situ remediation method for underground water ammonia nitrogen pollution place.
The present invention degrades to the efficient oxidation of ammonia nitrogen pollutant in underground water by generating the micro-nano bubble of ozone, realization,
Relative to other based technique for in-situ remediation, with oxidative degradation, high-efficient, speed is fastly, removal is thorough, does not generate secondary pollution, cost
Cheap, simple and easy to do advantage, has a good application prospect.
Compared with existing the relevant technologies, it is using beneficial effect caused by the present invention:
1, using ozone as oxidant, reaction condition is mild, degradation efficiency is high, by-product is few, and oxidant itself
Any polluter, and the ammonia nitrogen pollutant of the effective oxidative degradation soil of energy, underground water will not be introduced.
2, the present invention filters out sodium bromide as the micro-nano bubble catalyst of ozone, Ke Yijin by many experiments of early period
One step increases the oxidability of micro-nano ozone bubbles, strengthens repairing effect, as long as the rationally usage amount of control catalyst and anti-
Condition is answered, can be nontoxic nitrogen by ammonia nitrogen exhaustive oxidation, and in safe range by the control of the sodium bromide of addition,
It will not be added and polluted-water due to the excess of bromine.
3, the present invention, which can make ozone in water, higher solubility, excites more superoxide radicals and hydroxyl free
Base extends ozone residence time in water, expands the contact range of ammonia nitrogen pollutant in ozone and underground water, improves oxygen
Change efficiency.
4, by the control to ground water field, the micro-nano bubble of manufactured ozone is diffused into biggish range, it is strong
Mass transfer ability can further promote the degradation of pollutant, improve oxidation remediation efficiency.
5, present invention energy real-time monitoring parameters, analyse repairing effect scientifically and are evaluated, be further reduced
Cost improves remediation efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of (one embodiment) of the invention.
Fig. 2 is the layout diagram of injection well, pumped well, monitoring well in (one embodiment) of the invention.
Specific embodiment
To keep goal of the invention of the invention, technical solution and advantage clearer, below in conjunction with embodiment to the present invention
Technical solution carry out clear, complete description.Obviously, described embodiments are some of the embodiments of the present invention, Er Feiquan
Portion's embodiment.Based on the embodiment in invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1: as shown in Figure 1, the micro-nano bubble of ozone of the invention (OMNB) underground water ammonia nitrogen pollution in-situ immobilization
System has 1~3 mouthful of injection well 7 that Polluted area direction of groundwater flow upstream position is arranged in, is arranged in Polluted area underground water
Flow to the pumped well 9 of downstream position, be arranged in subsurface flow upward 2~4 mouthfuls of monitoring wells 8, drinking-water pipe 10 and suction pump 11,
Ozone micro-nano bubble preparation system 13, connects going out for the micro-nano bubble preparation system of ozone at catalyst injection device 14
The mouth of a river and the air supply pipe 2 of catalyst injection device, the control valve 6 being installed on air supply pipe 2, with injection well one by one corresponding 1
~3 water injection pipes 12.There is the micro-nano bubble preparation system 13 of ozone the pressure bottle 1 being successively linked in sequence, ozone to occur
Device 3 and micro-nano bubble generator 4, pressure bottle 1 are connected with ozone generator 3 by the first air supply pipe 2 ', ozone generator 3
" it is connected with micro-nano bubble generator 4 by the second air supply pipe 2.(the suction pump position of suction pump 11 is equipped in the pumped well 9
Below groundwater level), pumped well 9 is drawn water by suction pump 11, forms ground water field, the underground water of extraction is by drawing water
Pipe 10 is transported to the micro-nano bubble preparation system of ozone, as the carrier fluid of micro-nano bubble, to improve remediation efficiency and prevent
Pollution range expands.One end of the micro-nano bubble generator 4 is equipped with water inlet and air inlet, and the other end is equipped with water outlet
Mouthful, the water inlet of micro-nano bubble generator 4 is connected with the water outlet of suction pump 11 by drinking-water pipe 10, micro-nano bubble hair
The micro-nano bubble water out of water outlet, that is, ozone of raw device 4 is connected by air supply pipe 2 with catalyst injection device 14, to injection
The upper end that well carries out the water injection pipe 12 of catalyst injection and the micro-nano bubble injection of ozone is connected with air supply pipe 2, water injection pipe 12
Bottom end be passed through in injection well 7 (and below water water level located underground), the control valve 6 being installed on air supply pipe 2 is located at water injection pipe
Between 12 and catalyst injection device 14, in this way, the micro-nano air-bubble of ozone, catalyst (sodium bromide) are passed through by water injection pipe 12
Injection well 7, catalyst are the oxidation effectivenesses for strengthening the micro-nano bubble of ozone.A straight line represents groundwater level, B arrow in Fig. 1
Head represents direction of groundwater flow.
Pressure bottle 1 in the micro-nano bubble preparation system of above-mentioned ozone is industrial grade oxygen gas cylinder；It is set on the air supply pipe 2
It is equipped with the gas flowmeter 5 to record gas production.
Embodiment 2: as shown in Figure 1, the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone of the invention is adopted
With the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of (use) ozone described in embodiment 1, it is characterised in that ozone
Micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method includes the following steps:
1~3 mouthful of injection well 7 is arranged by the region upstream position of ammonia and nitrogen pollution in underground water, under the region in the first step
It swims position and 1 mouthful of pumped well 9 is set, and set up 2~4 mouthfuls of monitoring wells 8 in the local ground watering stream；
Second step is drawn water using suction pump 11 in pumped well 9, and ground water field is formed, and speed of drawing water passes through control injection
Flow velocity is simulated to obtain by software；
Third step opens ozone generator 3, the oxygen in pressure bottle 1 is input in ozone generator, generates ozone；
The ozone that the underground water of step 2 extraction and step 3 generate is passed through micro-nano bubble generator by the 4th step simultaneously
4, form the micro-nano air-bubble of ozone；
5th step is injecting setting while the micro-nano air-bubble of the ozone that step 4 is prepared injects underground
The control valve 6 of 7 top of well is opened, by the catalyst sodium bromide in catalyst injection device 14 together with the micro-nano air-bubble of ozone
Underground is injected by the water injection pipe 12 in injection well 7, the micro-nano bubble of ozone is spread with the movement of underground water, it is dirty to decompose ammonia nitrogen
Contaminate object；
6th step monitors bromination sodium content in the palliating degradation degree and underground water of ammonia nitrogen pollutant using monitoring well 8, adjusts micro-
Nano bubble injects duration (time) and sodium bromide implantation concentration, judges the reparation degree of underground water ammonia nitrogen pollution.
Above-mentioned pressure bottle 1 is industrial grade oxygen gas cylinder, oxygen purity >=99%；The ozone generator 3 uses recirculated water cooling
But, external source of oxygen, micro computer automatically control, without artificial on duty, ozone concentration >=5% of generation.Above-mentioned micro-nano bubble
The bubble diameter that generator 4 generates is between 200nm~4 μm, bubble inclusion rate 84%~90%.In above-mentioned steps five, catalyst
The implantation concentration of sodium bromide adds content, catalyst related with ozone content in bromine content in underground water and micro-nano air-bubble
The injection rate of sodium bromide is calculated as follows formula and determines:In formula: C
(Br-) it is that the initial bromide ion of injection well adds concentration, unit mg/L injects the micro-nano air-bubble of every liter of ozone of underground
The content of middle sodium bromide；C(O3)Micro-nano air-bubbleFor micro-nano bubble Measuring Ozone Concentration in Water, unit mg/L；C(Br-)Underground waterFor underground
Bromide ion concentration in water, unit mg/L.With the progress of recovery technique, bromide ion concentration can be gradually risen in underground water, note
Content is added needed for entrance to reduce therewith.Catalyst sodium bromide passes through the note in injection well 7 together with the micro-nano air-bubble of ozone
The flow velocity (injection flow velocity) that water pipe 12 injects underground should be controlled in 0.5-1m/h, inject flow and underground water can be used in injection flow velocity
Numerical simulation software determines.
Application example 1: place underground is discarded to certain northern chemical plant using technology of the present invention (system and method)
Water ammonia and nitrogen pollution is repaired, the long 13m of contaminated site thing, the wide 9.5m in north and south.The place groundwater level buried depth is 4m or so,
Water level elevation is 2-4m.Its underground water general flow direction is to flow from the north-westward southeast, and runoff is slow.Knot is investigated and sampled according to early period
Fruit, the region are contaminated sites source region, and water-bearing layer is by serious pollution on aerated zone soil and 20m, wherein NH4 +- N is
The characteristic contamination of contaminated area underground water, at concentrations up to 2000mg/L, ionic bromide content 0.3mg/L in underground water.In-situ immobilization
Test is directed to the water-bearing layer, and in place, southeast corner lays 1 mouthful of injection well 7 and corresponding (3 mouthfuls) single hole monitoring well 8, in underground water
Downstream position builds 1 mouthful of pumped well 9.Injection well 7 is located at most upstream, it and monitoring well 8 are in a section, and monitoring well 8 is mutual
Away from for 1m (or 2m), pumped well is 5m at a distance from injection well 7.Each well specific location is as shown in Figure 2.
Catalyst sodium bromide passes through the water injection pipe 12 in injection well 7 together with the micro-nano air-bubble of ozone in this application example
The flow control of underground is injected in 1m/h, and catalyst sodium bromide injects the total injection rate of underground together with the micro-nano air-bubble of ozone
(water-bearing layer total injection rate) is 6m3.Micro-nano bubble Measuring Ozone Concentration in Water is 24.43mg/L.The catalyst bromination being initially injected into
Sodium adds content and is calculated as 5.4mg/L according to formula, i.e., contains 5.4 milligrams in the micro-nano air-bubble of every liter of ozone of injection underground
Sodium bromide.It injects flow and 36-78L/h (can use 62.5L/h) is determined as by groundwater Numerical Simulation.In injection stage
Real-time monitoring is carried out to monitoring well 8, measures NH4 +- N and Br-Concentration.After 4 days, NH in the underground water of water-bearing layer4 +- N removal rate reaches
93%.
Application example 2: certain discarded chemical fertilizer factory by ammonia and nitrogen pollution, underground water buried depth 9m or so, the nearly 6m of water-bearing layer thickness.
Contaminated area is 850m2, NH in underground water4 +The average total concentration of-N pollutant reaches 786mg/L, initial bromide ion in underground water
Concentration is 4.7mg/L.According to place hydrological geological conditions and pollution level, this contaminated site lays 1 mouthful of injection well, 1 mouthful of pumping altogether
Well, since bromide ion concentration is greater than the 24% of micro-nano bubble Measuring Ozone Concentration in Water in underground water, so there is no need to additionally add to urge
Agent sodium bromide.The injection flow 6-10L/h of injection well is determined, while by simulating for monitor and repairing effect, in Pollution Field
Lay 4 mouthfuls of monitoring wells in ground.The well casing depth of all injection wells, pumped well and monitoring well is 15m, and wherein 0-9m or more is using real
Pipe, 9-15m use screen casing.The result shows that mesh in the place soil can effectively be aoxidized by injecting the technology by 7 days original positions
It marks pollutant (ammonia nitrogen), average removal rate 91%.
Application example 3: certain displaced plant, underground water buried depth 11m or so, the nearly 8m of water-bearing layer thickness.Due to what is leaked
Ammonium hydroxide influences, NH in underground water4 +The maximum concentration of-N pollutant is up to 17860mg/L, and initial bromide ion concentration is in underground water
1.9mg/L.Since contaminated sites situation is serious, smell is pungent, this contaminated site lays 3 mouthfuls of injection wells altogether, 1 mouthful of pumped well, and 3 mouthfuls
Monitoring well.Determine that the injection flow 12-14L/h of single port injection well, extraction flow are 36-42L/h by simulating.Micro-nano bubble
Measuring Ozone Concentration in Water is 39mg/L.Content calculation formula is added according to catalyst obtain the content that adds of initial sodium bromide be
7.2mg/L.Final result is, by 18 days micro-nano bubble injection experiments, ammonia nitrogen pollutant maximum concentration was down to 84mg/L,
Its average removal rate is 99.5%.
(above embodiments) of the invention provide a kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone
And method, compared with existing the relevant technologies, it is high-efficient to ammonia nitrogen pollutant oxidative degradation, and decomposition rate is fast (to be repaired work efficiency to mention
It is high by 25% or more), removal thoroughly, will not generate secondary pollution, and it is (rehabilitation cost reduces 30% or more) low in cost, it is easy
It is easy, it is easy to promote and utilize.
Claims (8)
1. a kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone has and is arranged in Polluted area subsurface flow
Upstream 1~3 mouthful of injection well (7) of position, the pumped well (9) that Polluted area direction of groundwater flow downstream position is set, setting
In subsurface flow upward 2~4 mouthfuls of monitoring wells (8), drinking-water pipe (10) and suction pump (11), it is characterised in that the ozone
Micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system also has the micro-nano bubble preparation system (13) of ozone, catalyst note
Enter device (14), the water outlet of the connection micro-nano bubble preparation system of ozone and catalyst injection device air supply pipe (2),
It is installed on that control valve (6) on air supply pipe (2), corresponding 1~3 water injection pipe (12), the ozone are micro- one by one with injection well
There is nano bubble preparation system (13) pressure bottle (1), ozone generator (3) and micro-nano bubble that are successively linked in sequence to occur
Device (4), pressure bottle (1) and ozone generator (3) are connected by the first air supply pipe (2 '), ozone generator (3) with it is micro-nano
Bubble generator (4) is connected by the second air supply pipe (2 ")；Suction pump (11) are equipped in the pumped well (9), micro-nano gas
The water inlet for steeping generator (4) is connected with the water outlet of suction pump (11) by drinking-water pipe (10), micro-nano bubble generator
(4) the micro-nano bubble water out of water outlet, that is, ozone is connected by air supply pipe (2) with catalyst injection device (14), to note
The upper end for entering the water injection pipe (12) that well carries out catalyst injection and the micro-nano bubble injection of ozone is connected with air supply pipe (2), infuses
The bottom end of water pipe (12) is passed through in injection well (7), and the control valve (6) being installed on air supply pipe (2) is located at water injection pipe (12) and urges
Between agent injection device (14).
2. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system of ozone according to claim 1, it is characterised in that
Pressure bottle (1) in the above-mentioned micro-nano bubble preparation system of ozone is industrial grade oxygen gas cylinder；It is arranged on the air supply pipe (2) useful
To record the gas flowmeter (5) of gas production.
3. a kind of micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone, it uses ozone described in claim 1
Micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation system, it is characterised in that the micro-nano bubble underground water ammonia nitrogen pollution of ozone is former
Position restorative procedure includes the following steps:
1~3 mouthful of injection well (7) is arranged by the region upstream position of ammonia and nitrogen pollution in underground water, in the region downstream in the first step
1 mouthful of pumped well (9) is arranged in position, and sets up 2~4 mouthfuls of monitoring wells (8) in the local ground watering stream；
Second step is drawn water using suction pump (11) in pumped well (9), and ground water field is formed；
Third step opens ozone generator (3), the oxygen in pressure bottle (1) is input in ozone generator, generates ozone；
The ozone that the underground water of step 2 extraction and step 3 generate is passed through micro-nano bubble generator (4) simultaneously by the 4th step,
Form the micro-nano air-bubble of ozone；
5th step while the micro-nano air-bubble of the ozone that step 4 is prepared injects underground, will be arranged in injection well (7)
The control valve (6) of top is opened, by the catalyst sodium bromide and the micro-nano air-bubble one of ozone in catalyst injection device (14)
It rises and underground is injected by the water injection pipe (12) in injection well (7), spread the micro-nano bubble of ozone with the movement of underground water, decompose
Ammonia nitrogen pollutant；
6th step adjusts micro-nano using bromination sodium content in the palliating degradation degree and underground water of monitoring well (8) monitoring ammonia nitrogen pollutant
Rice bubble injection duration and sodium bromide injection rate, judge the reparation degree of underground water ammonia nitrogen pollution.
4. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone according to claim 3, it is characterised in that
Above-mentioned pressure bottle (1) is industrial grade oxygen gas cylinder, oxygen purity >=99%；The ozone generator (3) uses circulating water, outside
Connect source of oxygen, ozone concentration >=5% of generation.
5. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone according to claim 3, it is characterised in that
The bubble diameter that above-mentioned micro-nano bubble generator (4) generates is between 200nm~4 μm, bubble inclusion rate 84%~90%.
6. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone according to claim 3, it is characterised in that
In above-mentioned steps five, the implantation concentration of catalyst sodium bromide is calculated as follows formula and determines:In formula: C (Br-) be injection well initial bromide ion add concentration,
Unit is mg/L, i.e., the content of sodium bromide in the micro-nano air-bubble of every liter of ozone of injection underground；C(O3)Micro-nano air-bubbleIt is micro-nano
Bubble Measuring Ozone Concentration in Water, unit mg/L；C(Br-)Underground waterFor bromide ion concentration in underground water, unit mg/L.
7. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone according to claim 3, it is characterised in that
In above-mentioned steps five, catalyst sodium bromide passes through the note of the water injection pipe (12) in injection well (7) together with the micro-nano air-bubble of ozone
The flow velocity for entering underground should be controlled in 0.5-1m/h.
8. the micro-nano bubble underground water ammonia nitrogen pollution in-situ remediation method of ozone according to claim 3, it is characterised in that
In above-mentioned steps five, catalyst sodium bromide passes through the note of the water injection pipe (12) in injection well (7) together with the micro-nano air-bubble of ozone
The flow velocity for entering underground should be controlled in 1m/h, and catalyst sodium bromide injects the total injection rate of underground together with the micro-nano air-bubble of ozone
For 6m3, injection flow is 36-78L/h, and it is 5.4mg/L that the catalyst sodium bromide being initially injected into, which adds content, that is, injects underground
Contain 5.4 milligrams of sodium bromide in the micro-nano air-bubble of every liter of ozone.
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