CN111451268A - Continuous soil bioremediation reactor and remediation method thereof - Google Patents
Continuous soil bioremediation reactor and remediation method thereof Download PDFInfo
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- CN111451268A CN111451268A CN202010287689.6A CN202010287689A CN111451268A CN 111451268 A CN111451268 A CN 111451268A CN 202010287689 A CN202010287689 A CN 202010287689A CN 111451268 A CN111451268 A CN 111451268A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
- B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
- B01F27/706—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with all the shafts in the same receptacle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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Abstract
The invention discloses a continuous soil bioremediation reactor and a remediation method thereof, belonging to the technical field of soil remediation and comprising a support combination device and a bioreactor device, wherein the support combination device comprises a plurality of groups of skid-mounted frames, the bioreactor device comprises a plurality of groups of bioreactors, each group of bioreactor comprises a support connection part, a stirring part, a sensor probe and a dosing spray device, the plurality of groups of bioreactors are respectively arranged at the bottoms of the plurality of groups of skid-mounted frames, the stirring part is arranged in the middle of the support connection part, and the dosing spray device is arranged on the inner side wall of the upper part of the support connection part. At present, each batch of a soil remediation bioreactor needs to be subjected to processes of microbial domestication, soil physicochemical property adjustment, reaction environment remodeling and the like, operation and maintenance are complex and time-consuming, the bioreactor cannot continuously operate, and the problems of low efficiency, small treatment capacity, unstable effect and the like exist.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a continuous soil bioremediation reactor and a remediation method thereof.
Background
The wide industrial and agricultural activities of human beings often cause soil pollution, and the common soil pollution is heavy metal pollution and organic pollution. In recent years, various countries have paid attention to the treatment of soil pollution, and the technical development of the soil pollution is very rapid. Among them, bioremediation techniques are considered to be the most viable. At present, the adopted soil bioremediation technology comprises in-situ treatment, on-site treatment and a bioreactor, the bioreactor can fully exert the characteristics of a biological method, and the most effective treatment process in the polluted soil bioremediation technology.
In the prior art, patent No. CN107931318A discloses a bioreactor for soil remediation, which comprises a tank body, a cover body is arranged at the top of the tank body in a matching manner, a jacket is welded outside the tank body, a plurality of liquid adding connecting pipes are arranged on the cover body, the liquid adding connecting pipes penetrate through the cover body and extend into the tank body, a charging port, a material supplementing port, a spare port and an exhaust port are also arranged on the cover body, permanent magnet grid sieves are arranged in the charging port and the spare port, material supplementing contact pins are inserted in the material supplementing port, an air inlet is arranged on one side of the tank body, a filter screen is covered on the air inlet, a through hole is arranged on one side of the tank body, a side view mirror is arranged in the through hole in a sealing manner, a discharge port is arranged at the bottom of the tank body, a ball valve is arranged on the discharge port, the side wall of the, the stirring shaft is also sleeved with a cylindrical micro-sieve. The bioreactor for soil remediation has the advantages of simple structure, convenience in use and good remediation effect.
Patent No. CN209318427U discloses a soil remediation bioreactor among the prior art, and this patent is including the installation base, the top fixed mounting of installation base has the spandrel columns that quantity is two, two the top of spandrel column all with the bottom fixed connection who stores the bucket, the top fixed mounting of installation base has the driving motor who is located between two spandrel columns. This soil remediation bioreactor, leading-in shower nozzle of outlet pipe through setting up with repair liquid, spray repair liquid through the shower nozzle and accomplish the restoration to soil, the transmission motor that sets up drives the transmission shaft and rotates, make the revolving stage drive the dwang and rotate, thereby accomplish the intensive mixing to soil, the fan of setting can effectively switch on the air current, the electric heat silk through setting up heats the air current, thereby adjust suitable temperature according to the repair conditions of soil, soil remediation's effect and prosthetic completability have been promoted, the time that consumes has been reduced, and the work efficiency is promoted.
According to the structure and effect comparison with the above patents, the problems that each batch needs to be subjected to processes such as microbial domestication, soil physicochemical property adjustment, reaction environment remodeling and the like, the operation and maintenance are complex and time-consuming, and the bioreactor cannot continuously operate, so that the efficiency is low, the treatment capacity is small, the effect is unstable and the like are solved.
Disclosure of Invention
The invention aims to provide a continuous soil bioremediation reactor, which aims to solve the problems of low efficiency, small treatment capacity, unstable effect and the like due to the fact that operation and maintenance are complicated and time-consuming, continuous operation cannot be realized, and the prior art is provided with a reactor for continuous soil bioremediation.
The invention provides a continuous soil bioremediation reactor, which comprises a supporting combination device and a bioreactor device, wherein the supporting combination device comprises a plurality of groups of skid-mounted frames, the plurality of groups of skid-mounted frames are sequentially combined and arranged along the vertical or horizontal direction for a cuboid frame structure and are mutually fixed through bolts, the bioreactor device comprises a plurality of groups of bioreactors, the plurality of groups of bioreactors are respectively arranged in the corresponding plurality of groups of skid-mounted frames, and the plurality of groups of bioreactors are sequentially connected.
Further, bioreactor includes support adapting unit, stirring part and adds medicine spray set, support adapting unit includes feed inlet, organism, discharging device, and stirring part sets up in the organism, the organism is uncovered ascending chamber that holds, and the feed inlet setting is in organism one side top, discharging device sets up in the opposite side bottom of organism, and the discharging device of preceding a set of bioreactor links to each other with the feed inlet of a set of bioreactor in back.
Furthermore, the support connecting part also comprises a plurality of openable top covers, and the openable top covers are arranged at the open position on the upper side of the machine body to form the top of the bioreactor.
Further, the feed inlet is arranged on the leftmost openable top cover.
Further, the dosing spraying device comprises a spraying head which is arranged on the upper side wall of the machine body.
Further, the support connection component further comprises a sensor probe comprising a pH, humidity, temperature, ventilation and/or bioactive probe.
Furthermore, the power device can be a motor or an air pump or a hydraulic pump, and a P L C controller is arranged for control.
Further, the stirring part includes two (mixing) shafts, two motors and two speed reducers, two motors set up side by side in sled dress frame bottom, and every along the horizontal direction the motor links to each other with the speed reducer that corresponds respectively, two be equipped with spiral stirring sword on the (mixing) shaft, and two the (mixing) shaft all runs through the organism and connects respectively on the output of the speed reducer that corresponds, but two motor independent control positive and negative rotations.
Furthermore, a plurality of openable top covers can be provided with an oxygen supply or air extraction device. More convenient for adjusting oxygen supply amount, and when volatile pollutants are more, the exhaust and the centralized treatment are carried out, thereby preventing secondary pollution.
Further, the invention also provides a continuous soil bioremediation method, which adopts the continuous soil bioremediation reactor and comprises the following steps:
s101, putting soil to be biologically repaired into a material inlet of a first group of bioreactors;
s102, starting a motor of the first group of bioreactors to enable the two main shafts to rotate clockwise, and pushing soil to move from the feeding hole to the discharging device along the same direction by the spiral stirring knife;
s103, converting the rotation direction of a motor of the first group of bioreactors to enable the two main shafts to rotate anticlockwise, and pushing the soil to flow back by the spiral stirring knife;
repeating the steps S102 and S103, and alternately carrying out the steps at intervals to enable the soil to be subjected to mixing and stirring for a preset time;
s201, outputting the soil of the first group of bioreactors from a discharging device to finish soil remediation or conveying the soil to a feeding hole of a second group of bioreactors;
s202, starting a motor of the second group of bioreactors to enable the two main shafts to rotate clockwise, and pushing soil to move from the feeding hole to the discharging device along the same direction by the spiral stirring knife;
s203, converting the rotation direction of a motor of the second group of bioreactors to enable the two main shafts to rotate anticlockwise, and pushing the soil to flow back by the spiral stirring knife;
repeating the steps S202 and S203, and alternately carrying out the steps at intervals to enable the soil to be subjected to mixing and stirring for a preset time;
s301, the soil of the second group of bioreactors is output from the discharging device to finish soil remediation or enters the next group of bioreactors, and the processing steps of the next group of bioreactors are the same as those of the first or second group of bioreactors, so that the remediation of the soil reaches the standard.
The preset time is determined according to the type and concentration of pollutants and the treatment capacity of soil, the preset time is generally 1 day to 10 days, and the alternating interval time is 10 min to 1 h.
Compared with the prior art, the invention has the beneficial effects that:
first, two motors of this reactor can independent control just reversing and rotational speed, realize the mixture and the transmission of material through the biax stirring, two main shafts of two motor independent control respectively, and when two main shafts rotate clockwise, the spiral stirring sword is pushing away the material and is advancing along same direction. When the two main shafts rotate anticlockwise, the spiral stirring knife pushes materials to flow back, and the materials can be alternately rotated at intervals to be mixed and stirred for a long time.
Secondly, through configuration multistage bioreactor, and the biax stirring adopts two main shafts that can independently control the pivoted, keeps sustainable feeding and continuous ejection of compact on the whole, can ensure the intensive mixing and the reaction of material, can realize continuous stable processing again, and do not need the intermittent type to shut down.
Third, bioreactor upper portion can open and shut the top cap design, the top cap that can open and shut that is closest to the motor side sets up the feed inlet, the top cap that can open and shut through electronic or pneumatic or hydraulic control, in order to make things convenient for the technological requirement, switch over bioreactor good oxygen at any time, oxygen deficiency or anaerobism restoration mode, be fit for different pollutants and the prosthetic needs of microorganism fungus liquid, and different bioreactors can close and open the quantity of closing through opening of the top cap that can open and shut, constitute the biological treatment technology of multistage series connection, also can be when handling volatile pollutant, close the top cap, effectively reduce the environment secondary pollution risk.
Fourthly, adding prepared microbial liquid, biological stimulant and the like through a dosing spraying device arranged at the top of the bioreactor, and realizing chemical oxidation, reduction or stabilization remediation of the polluted soil by changing the types of the added remediation agents.
And fifthly, the pH, humidity, temperature, ventilation and biological activity of the soil can be monitored in real time by utilizing a built-in sensor probe, so that the reaction conditions are conveniently regulated and controlled.
Sixthly, the skid-mounted frame is convenient for the transportation of a single bioreactor, is convenient for the multistage series connection in the horizontal direction and the multistage series connection in the vertical direction of a plurality of bioreactors, and can be flexibly combined according to the process requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a front view of the bioreactor apparatus of the present invention;
FIG. 3 is a front view of the bioreactor apparatus of the present invention;
fig. 4 is a front view of the openable/closable top cover of the present invention.
Reference numerals:
skid-mounted frame 1, feed inlet 2, medicine spray set 3, openable top cap 4, organism 5, sensor probe 6, (mixing) shaft 7, discharging device 8, motor 9, speed reducer 10, first order bioreactor 11, second order bioreactor 12, third order bioreactor 13, support adapting unit 14, stirring part 15.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 4, an embodiment of the present invention provides a continuous soil remediation bioreactor, including a support assembly and a bioreactor device, where the support assembly includes multiple sets of skid-mounted frames 1, the multiple sets of skid-mounted frames 1 are rectangular frames and are sequentially arranged in a vertical or horizontal direction, and are fixed to each other by bolts, the skid-mounted frames 1 facilitate transportation of a single bioreactor, the bioreactor device includes multiple sets of bioreactors, the multiple sets of bioreactors are divided into a first-stage bioreactor 11, a second-stage bioreactor 12 and a third-stage bioreactor 13 from top to bottom, each set of bioreactors includes a support connection component 14, a stirring component 15, a sensor probe 6 and a chemical-adding spray device 3, the multiple sets of bioreactors are respectively disposed at the bottoms of the multiple sets of skid-mounted frames 1, the multiunit the same direction that sets up of bioreactor is different, sets up second level bioreactor 12 in the middle part and sets up the first order bioreactor 11 on upper portion and the third level bioreactor 13 position opposite direction of lower part, and the discharge end that is convenient for second level bioreactor 12 and first level bioreactor 11 links to each other, and the discharge end of second level bioreactor 12 links to each other with the feed end of third level bioreactor 13, stirring part 15 sets up in support adapting unit 14 middle part, adds medicine spray set 3 and sets up on support adapting unit 14 upper portion inside wall.
The supporting and connecting part 14 comprises a feed inlet 2, a machine body 5, a discharging device 8 and three openable top covers 4, the machine body 5 is a cuboid containing cavity with an upward opening, eight supporting columns are arranged at the bottom, the supporting columns extend downwards and are fixedly connected with the lower side of the skid-mounted frame 1 to play a supporting and containing role, the three openable top covers 4 are arranged at the position of the upper side of the machine body 5 with an opening to form the top of the continuous soil bioremediation reactor, the openable top covers 4 can be opened and closed through electric or pneumatic or hydraulic control to facilitate the process requirements, aerobic, anoxic or anaerobic remediation modes of the bioreactor are switched at any time, the requirements of different pollutants and microbial liquid remediation are met, different bioreactors can be opened and closed through the openable top covers 4 to form a multistage series biological treatment process, the feed inlet 2 is arranged on the leftmost openable top cover 4, the feeding is convenient, the discharging device 8 is arranged at the right side of the bottom of the machine body 5, the discharging device 8 of the front group of bioreactors is connected with the feeding port 2 of the rear group of bioreactors, and the series multistage biological treatment process is formed.
Add medicine spray set 3 and include the shower head, set up on the last lateral wall of organism 5, its benefit is the soil in the stirring with the even addition of the microbial inoculum, biological stimulant, chemical oxidant andor other restoration medicaments that dispose, for the microorganism provides favorable living environment in the soil or directly carries out restoration such as redox to the pollutant.
The stirring component 15 comprises two stirring shafts 7, two motors 9 and two speed reducers 10, the two motors 9 are arranged on the left side of the inner side wall of the bottom of the skid-mounted frame 1 in parallel along the horizontal direction, the speed reducer 10 is arranged on the upper side of each motor 9, spiral stirring knives are arranged on the two stirring shafts 7, the two stirring shafts 7 penetrate through the machine body 5 and are respectively sleeved on the output ends of the speed reducers 10, the two motors 9 provide power to drive the stirring shafts 7 to stir through the speed reducers 10, and the two motors 9 independently control the two main shafts, so that the spiral stirring knives can be controlled to push materials to advance along the same direction or push the materials to flow back, the materials can be subjected to mixing stirring for a long time through alternate rotation at intervals, sustainable feeding and continuous discharging are kept on the whole, full mixing and reaction of the materials can be guaranteed, without intermittent shut downs.
The working principle is as follows: soil to be biologically repaired is put into a feeding port of a first-stage bioreactor 11, a motor 9 works to control a stirring shaft 7 to rotate through a speed reducer, a spiral stirring knife on the stirring shaft 7 rotates alternately to stir the soil alternately at intervals, because the first-stage bioreactor 11 needs to be provided with an aerobic environment, a power device controls an openable top cover 4 to be opened, and an oxygen supply device is started if necessary to ensure that the interior of a machine body 5 is fully contacted with oxygen, at the moment, a prepared microbial liquid, a biological stimulant and the like are sprayed by a medicine adding and spraying device 3, the soil biological repair is carried out in the aerobic environment, a sensor probe 6 detects the pH, the humidity, the temperature, the ventilation quantity and the biological activity in the soil in real time, when the expected effect is achieved in the first-stage bioreactor 11, a spiral stirring blade conveys the soil to a discharging device 8, and the discharging device 8 is connected with a feeding port 2 of a second-stage bioreactor, the next biological reaction is carried out, and the reaction solution is mixed,the working principle of the second stage bioreactor 12 and the third stage bioreactor 13 is the same as that of the first stage bioreactor 11, but the second stage bioreactor 12 controls the environment in an anoxic environment, the third stage bioreactor 13 controls in an anaerobic environment, the soil bioremediation effect can be improved by the series multistage biological treatment process, for example, two stages of bioreactors in series can be arranged to treat soil polluted by organic nitrogen compounds, such as soil polluted by amines, nitrogen heterocycles, nitriles and nitro compounds, at the moment, the openable top cover 4 on the first stage bioreactor 11 can be opened, preferably, an air pipe or an oxygen gas can be arranged at the same time to make the first stage bioreactor 11 in an aerobic state, ammonifying bacteria and nitrifying bacteria are added into the first stage bioreactor 11, the organic nitrogen compounds are converted into NH3-N under the action of the ammonifying bacteria, NH3-N is further decomposed and oxidized into NO by nitrifying bacteria2-And NO3-Since nitrifying bacteria are sensitive to environmental changes and the proliferation thereof is suitably an aerobic environment, the soil treated in the first-stage bioreactor 11 contains a large amount of NO2-And NO3-Under the action of the stirring device, the soil obtained by the treatment of the first-stage bioreactor 11 enters the second-stage bioreactor 12, the denitrifying bacteria are added into the first-stage bioreactor, and NO is added under the action of the denitrifying bacteria2-And NO3-Is reduced into gaseous nitrogen, the denitrifying bacteria are appropriately proliferated in an environment where aerobic and anoxic alternate exist, so that the second-stage bioreactor 12 can obtain an appropriate aerobic and anoxic alternate state by opening or closing the openable and closable top cover 4 at a proper time and the opening and closing quantity of the openable and closable top cover, so as to facilitate the reaction.
Of course, the continuous soil bioremediation reactor can also be used for carrying out aerobic reaction on the soil polluted by petroleum hydrocarbon, can also be used for carrying out anaerobic reaction on the soil polluted by chlorohydrocarbon, can be converted through the top cover 4, and can also be used for creating an aerobic environment through manual ventilation or creating an anaerobic environment through nitrogen filling.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a continuous type soil bioremediation reactor, its characterized in that, is including supporting combination equipment and bioreactor equipment, it includes multiunit sled dress frame (1) to support combination equipment, multiunit sled dress frame (1) makes up the range in proper order along vertical or horizontal direction for cuboid frame construction, through the bolt reciprocal anchorage, bioreactor equipment includes multiunit bioreactor, multiunit bioreactor sets up corresponding multiunit respectively inside sled dress frame (1), multiunit bioreactor connects gradually.
2. The continuous soil bioremediation reactor according to claim 1, wherein the bioreactor comprises a support connection part (14), a stirring part (15) and a dosing spray device (3), the support connection part (14) comprises a feed inlet (2), a machine body (5) and a discharge device (8), the stirring part (15) is arranged in the machine body (5), the machine body (5) is a cavity with an upward opening, the feed inlet (2) is arranged above one side of the machine body (5), the discharge device (8) is arranged at the bottom of the other side of the machine body (5), and the discharge device (8) of the former group of bioreactors is connected with the feed inlet (2) of the latter group of bioreactors.
3. The continuous soil bioremediation reactor according to claim 2, further comprising a plurality of openable/closable top covers (4), wherein the plurality of openable/closable top covers (4) are provided at positions where the upper side of the body (5) is opened to form a top of the bioreactor.
4. A continuous soil bioremediation reactor according to claim 3, wherein the inlet opening (2) is provided in the leftmost openable top cover (4).
5. The continuous soil bioremediation reactor according to claim 2, wherein the chemical dosing spray device (3) includes a spray header provided on an upper side wall of the body (5).
6. A continuous soil bioremediation reactor according to claim 2, further comprising a sensor probe (6), wherein the sensor probe (6) comprises a pH, humidity, temperature, aeration and/or bioactive probe.
7. A continuous soil bioremediation reactor according to claim 3, wherein the plurality of openable top covers (4) are independently opened and closed by a power unit.
8. The continuous soil bioremediation reactor according to claim 2, wherein the stirring member (15) includes two stirring shafts (7), two motors (9) and two speed reducers (10), the two motors (9) are arranged at the bottom of the skid-mounted frame (1) in parallel along the horizontal direction, each motor (9) is connected to a corresponding speed reducer (10), spiral stirring blades are arranged on the two stirring shafts (7), the two stirring shafts (7) penetrate through the machine body (5) and are connected to the output ends of the corresponding speed reducers (10), and the two motors (9) can independently control forward and reverse rotation.
9. A continuous soil bioremediation method using the continuous soil bioremediation reactor of claim 8, comprising the steps of:
s101, putting soil to be biologically repaired into a material inlet of a first group of bioreactors;
s102, starting a motor of the first group of bioreactors to enable the two main shafts to rotate clockwise, and pushing soil to move from the feeding hole to the discharging device along the same direction by the spiral stirring knife;
s103, converting the rotation direction of a motor of the first group of bioreactors to enable the two main shafts to rotate anticlockwise, and pushing the soil to flow back by the spiral stirring knife;
repeating the steps S102 and S103, and alternately carrying out the steps at intervals to enable the soil to be subjected to mixing and stirring for a preset time;
s201, outputting the soil of the first group of bioreactors from a discharging device to finish soil remediation or conveying the soil to a feeding hole of a second group of bioreactors;
s202, starting a motor of the second group of bioreactors to enable the two main shafts to rotate clockwise, and pushing soil to move from the feeding hole to the discharging device along the same direction by the spiral stirring knife;
s203, converting the rotation direction of a motor of the second group of bioreactors to enable the two main shafts to rotate anticlockwise, and pushing the soil to flow back by the spiral stirring knife;
repeating the steps S202 and S203, and alternately carrying out the steps at intervals to enable the soil to be subjected to mixing and stirring for a preset time;
s301, the soil of the second group of bioreactors is output from the discharging device to finish soil remediation or enters the next group of bioreactors, and the processing steps of the next group of bioreactors are the same as those of the first or second group of bioreactors, so that the remediation of the soil reaches the standard.
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| CN112222168A (en) * | 2020-09-15 | 2021-01-15 | 北京高能时代环境技术股份有限公司 | Soil remediation method and desorption equipment for soil remediation |
| CN112516834A (en) * | 2020-11-13 | 2021-03-19 | 湖北宇浩高科新材料有限公司 | Preparation system and preparation process of carbon nanotube slurry with electric and heat conduction functions |
| CN113857228A (en) * | 2021-09-29 | 2021-12-31 | 马长凤 | Remediation method based on polluted homeland resources and space planning utilization method thereof |
| CN114515747A (en) * | 2022-01-21 | 2022-05-20 | 广西博世科环保科技股份有限公司 | Microorganism mineralization reaction system and method for non-ferrous metal smelting slag |
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