CN111167850B - Post-treatment method for chemical remediation of contaminated soil - Google Patents
Post-treatment method for chemical remediation of contaminated soil Download PDFInfo
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- CN111167850B CN111167850B CN202010028544.4A CN202010028544A CN111167850B CN 111167850 B CN111167850 B CN 111167850B CN 202010028544 A CN202010028544 A CN 202010028544A CN 111167850 B CN111167850 B CN 111167850B
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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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Abstract
The invention relates to a chemical remediation post-treatment method for contaminated soil, which uses a soil remediation device, wherein the soil remediation device comprises a support frame, a pressure tank unit and a remediation unit, the pressure tank unit is arranged between the inner walls of the front end and the rear end of the support frame, and the remediation unit is arranged in the support frame; according to the method for repairing the polluted soil, the treatment liquid is fully and uniformly sprayed into the polluted soil in a drip irrigation mode, and the treatment liquid is fully contacted and reacted with the polluted soil, so that the problems that part of soil is always in a polluted state and the treatment is not thorough are solved; according to the invention, the polluted soil is separated and pressed into the liquid guide groove, so that the treatment efficiency of the polluted soil is improved, and the waste liquid in the soil is guided out, thereby solving the problems that the waste liquid formed after the treatment liquid reacts with the polluted soil cannot be discharged, and is absorbed by the soil in the soil to form secondary pollution.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a post-treatment method for chemical remediation of contaminated soil.
Background
At present, about 2 hundred million acres of cultivated land in China have the problems of food safety and ecological safety in utilization, wherein about 30 percent of land is subjected to moderate and severe heavy pollution caused by heavy metal. In parts of provinces such as Liaoning, Hunan, Zhejiang, Jiangxi, Sichuan, Guizhou, Guangdong and Guangxi, heavy metal pollution problems exist to different degrees, and most of the soil has composite pollution of volatile organic compounds and cadmium, and the major part is the plant and mining area. Waste gas, waste water, waste residue and automobile exhaust discharged in the production and operation of industrial and mining enterprises, sludge in sewage treatment plants and industrial waste water and waste residue dumping cause a large amount of soil combined pollution, unreasonable use of agricultural input products such as sewage irrigation, chemical fertilizers, pesticides and agricultural films in agricultural production activities, livestock and poultry breeding and the like; in particular, in polluted sites of enterprise areas such as petroleum, chemical engineering, coking and the like, the pollutants are represented by organic solvent halogenated hydrocarbons, and are often compounded with other pollutants such as heavy metals of cadmium, arsenic, chromium, lead and the like. The typical combined pollution is volatile halohydrocarbon-cadmium soil combined pollution. Therefore, the soil organic matter and heavy metal combined pollution is gradually a focus of public attention.
The treatment method for chemically restoring the polluted soil often has the following problems: firstly, the treatment solution cannot be in full contact with the polluted soil, so that part of the soil is always in a polluted state, and the treatment is not thorough, so that the polluted soil is in a polluted state; and secondly, waste liquid formed after the treatment liquid reacts with the polluted soil cannot be discharged, and is absorbed by the soil in the soil to form secondary pollution.
Disclosure of Invention
The invention aims to provide a post-treatment method for chemically repairing contaminated soil, which has the functions of fully contacting treatment liquid with the contaminated soil in a drip irrigation mode and recovering waste liquid, and solves the problems.
A chemical remediation post-treatment method for contaminated soil uses a soil remediation device, the soil remediation device comprises a support frame, a pressure tank unit and a remediation unit, and the treatment method for the contaminated soil by adopting the soil remediation device further comprises the following steps:
s1, erection: placing and fixing the soil remediation device above the contaminated soil in a manual or mechanical assistance manner;
s2, groove pressing operation: the driving motor rotates the cam to drive the pressure groove block to repeatedly press the polluted soil, so that the polluted soil uniformly forms a plurality of liquid guide grooves from front to back, and the polluted soil is divided into a plurality of parts by the liquid guide grooves;
s3, drip irrigation operation: opening a liquid control valve to slowly introduce the treatment liquid into the polluted soil through a drip irrigation mechanism, wherein the treatment liquid reacts with chemical substances in the polluted soil to form waste liquid which flows into a liquid guide groove;
s4, recovery operation: the liquid pump drives the liquid suction port to pump the waste liquid in the liquid guide groove and guide the waste liquid into the waste liquid cylinder;
s5, soil taking operation: shoveling out and collecting the polluted soil which is compacted to form a liquid guide groove in a manual or mechanical auxiliary mode;
s6, test operation: sampling and detecting the repaired contaminated soil to see whether the repair of the contaminated soil is finished;
s7, processing: performing innocent treatment on the waste liquid and the polluted soil collected in the step S5;
a pressure groove unit is arranged between the inner walls of the front end and the rear end of the support frame, and a repair unit is arranged in the support frame; the groove pressing unit separates the polluted soil and is provided with a liquid guide groove to assist the recovery of waste liquid, the repairing unit drips the treating liquid onto the polluted soil and recovers the treated waste liquid,
the pressure groove unit comprises a driving motor, a rotating rod, a rotating cam, a lower pressure plate, a sliding column, a pressure groove block and an auxiliary spring, a driving cavity is arranged on the inner wall of the rear end of the supporting frame, the driving motor is installed on the inner wall of the rear end of the driving cavity through a motor support, the rotating rod is installed between the inner walls of the front end and the rear end of the supporting frame through a bearing, the output end of the driving motor is connected with the rear end of the rotating rod through a coupling, the lower pressure groove is uniformly formed in the supporting frame from front to back, the lower pressure plate is connected with the lower pressure groove through a sliding mode, the sliding column is uniformly installed at the lower end of the lower pressure plate from left to right, the sliding column is connected with the inner wall of the lower end of the lower pressure groove through a sliding mode, the auxiliary spring is connected between the lower pressure plate and the inner wall of the lower end of the lower pressure groove, the auxiliary spring is sleeved on the sliding column, and the pressure groove block is arranged at the lower end of the sliding column;
the repair unit include the stock solution chamber, drip irrigation the mechanism, a waste liquid section of thick bamboo, the drawing liquid pump, the contact tube, the pressure manifold, imbibition mouth and liquid outlet, turn right from a left side in the stock solution chamber and evenly set up in the support frame, the stock solution chamber is located between the adjacent indent down, stock solution chamber lower extreme is provided with drips irrigation the mechanism, support frame bilateral symmetry is provided with the drawing liquid chamber, be provided with a waste liquid section of thick bamboo on the inner wall of drawing liquid intracavity end, be provided with the drawing liquid pump on the inner wall of drawing liquid chamber upper end, the symmetry is provided with the imbibition mouth on the support frame left and right sides both ends inner wall, be connected through the contact tube between drawing liquid pump and the waste liquid section of thick bamboo, be connected through the pressure manifold between drawing liquid pump and the imbibition mouth, waste liquid section of thick bamboo rear end is provided with the liquid outlet. Drip irrigation the even contaminated soil that drips into of mechanism with the treatment fluid, the waste liquid that the drawing liquid pump was inhaled through the imbibition mouth and is come is led into a waste liquid section of thick bamboo through the eduction tube, and the liquid outlet can be followed to the waste liquid and is discharged.
As a preferable scheme of the present invention, the upper end of the lower pressing plate is provided with a cam groove, and the cam groove is connected with the rotating cam in a sliding manner.
As a preferable scheme of the invention, the shape of the groove pressing block is an upward concave flat plate structure, and the cross section of the groove pressing block is an arc-shaped surface structure which is convex downwards.
As a preferable scheme of the present invention, one end of the collecting pipe is connected to the liquid pump, and the other end of the collecting pipe is connected to the liquid suction port through a plurality of pipeline branches.
As a preferable scheme of the invention, the drip irrigation mechanism comprises a cavity to be dripped, a flow control valve, drip irrigation needle tubes, drip irrigation ports and a flow limiting plate, wherein the cavity to be dripped is arranged at the lower end of the support frame, the cavity to be dripped is communicated with the liquid storage cavity through the flow control valve, the drip irrigation needle tubes are uniformly arranged at the lower end of the cavity to be dripped from left to right, the drip irrigation ports are arranged at the lower end of the drip irrigation needle tubes, and the flow limiting plate is arranged on the upper side of the inner wall of the drip irrigation needle tubes. The flow control valve controls the amount of the treatment liquid led out from the liquid storage cavity, the flow limiting plate enables a large amount of treatment liquid to be deposited in the cavity to be dripped, the treatment liquid is uniformly and slowly dripped into the polluted soil through flow limiting, and the treatment liquid is more fully contacted with the polluted soil.
In a preferred embodiment of the present invention, the flow restriction plate is a metal circular plate structure extending over the capillary hole.
(III) advantageous effects
1. According to the method for repairing the polluted soil, the treatment liquid is fully and uniformly sprayed into the polluted soil in a drip irrigation mode, and the treatment liquid is fully contacted and reacted with the polluted soil, so that the problems that part of soil is always in a polluted state and the treatment is not thorough are solved; according to the invention, the polluted soil is divided and pressed into the liquid guide groove, so that the treatment efficiency of the polluted soil is improved, and the waste liquid in the soil is guided out, thereby solving the problems that the waste liquid formed after the treatment liquid reacts with the polluted soil cannot be discharged and is absorbed by the soil in the soil to form secondary pollution;
2. the driving motor drives the row of rotating cams to rotate together, so that the lower pressing plates are driven to feed downwards, the groove pressing blocks are driven to compact the polluted soil, a liquid guide groove with little waste liquid can be formed, the liquid guide groove is in a semicircular shape through the groove pressing block structure, the middle of the liquid guide groove is high, the two ends of the liquid guide groove are low, the waste liquid is convenient to recover, and the auxiliary spring drives the lower pressing plates to reset, so that the polluted soil is repeatedly extruded.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a process flow diagram of the present invention for processing aluminum panels;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a cross-sectional view taken along section B-B of FIG. 2 in accordance with the present invention;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3 in accordance with the present invention;
FIG. 6 is an enlarged view of a portion I of FIG. 5 in accordance with the present invention;
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 6, a method for treating contaminated soil after chemical remediation uses a soil remediation device, the soil remediation device includes a support frame 1, a pressure tank unit 2 and a remediation unit 3, and the method for treating contaminated soil using the soil remediation device further includes the following steps: the groove pressing unit 2 separates the polluted soil and sets a liquid guide groove to assist the recovery of waste liquid, the repairing unit 3 drips the treating liquid onto the polluted soil and recovers the treated waste liquid,
s1, erection: placing and fixing the soil remediation device above the contaminated soil in a manual or mechanical assistance manner;
s2, groove pressing operation: the cam 23 is rotated by the driving motor 21 to drive the groove pressing block 26 to repeatedly press the polluted soil, so that a plurality of liquid guide grooves are uniformly formed in the polluted soil from front to back, and the polluted soil is divided into a plurality of parts by the liquid guide grooves;
s3, drip irrigation operation: opening a liquid control valve to slowly introduce the treatment liquid into the polluted soil through the drip irrigation mechanism 32, wherein the treatment liquid reacts with chemical substances in the polluted soil to form waste liquid which flows into a liquid guide groove;
s4, recovery operation: the liquid pump 34 drives the liquid suction port 37 to pump the waste liquid in the liquid guide groove and guide the waste liquid into the waste liquid cylinder 33;
s5, soil taking operation: shoveling out and collecting the polluted soil which is compacted to form a liquid guide groove in a manual or mechanical auxiliary mode;
s6, test operation: sampling and detecting the repaired contaminated soil to see whether the repair of the contaminated soil is finished;
s7, processing: performing innocent treatment on the waste liquid and the polluted soil collected in the step S5;
a pressure groove unit 2 is arranged between the inner walls of the front end and the rear end of the support frame 1, and a repair unit 3 is arranged in the support frame 1;
the grooving unit 2 comprises a driving motor 21, a rotating rod 22 and a rotating cam 23, the device comprises a lower pressing plate 24, a sliding column 25, a groove pressing block 26 and an auxiliary spring 27, wherein a driving cavity is arranged on the inner wall of the rear end of a support frame 1, a driving motor 21 is installed on the inner wall of the rear end of the driving cavity through a motor support, a rotating rod 22 is installed between the inner walls of the front end and the rear end of the support frame 1 through bearings, the output end of the driving motor 21 is connected with the rear end of the rotating rod 22 through a coupling, lower pressing grooves are uniformly formed in the support frame 1 from front to back, the lower pressing plate 24 is connected with the lower pressing grooves in a sliding mode, the sliding column 25 is uniformly installed at the lower end of the lower pressing plate 24 from left to right, the sliding column 25 is connected with the inner wall of the lower end of the lower pressing grooves in a sliding mode, the auxiliary spring 27 is connected between the lower pressing plate 24 and the inner wall of the lower end of the lower pressing grooves, the auxiliary spring 27 is sleeved on the sliding column 25, and the groove pressing block 26 is arranged at the lower end of the sliding column 25; the upper end of the lower pressing plate 24 is provided with a cam groove, and the cam groove is connected with the rotating cam 23 in a sliding mode. The shape of the groove pressing block 26 is a concave flat plate structure which is concave upwards, and the cross section of the groove pressing block 26 is an arc surface structure which is convex downwards. Driving motor 21 drives one row and rotates cam 23 together, thereby it feeds downwards to drive a plurality of holding down plates 24, thereby drive indent piece 26 and carry out the compaction to polluting soil, form the liquid guide groove that can only permeate the waste liquid a small amount, make the shape in liquid guide groove be semi-circular through indent piece 26 structure, and high in the middle of the liquid guide groove, both ends are low, make things convenient for the waste liquid to be retrieved, auxiliary spring 27 drives holding down plate 24 and resets, thereby extrude repeatedly and pollute soil.
Repair unit 3 include stock solution chamber 31, drip irrigation mechanism 32, waste liquid barrel 33, drawing liquid pump 34, contact tube 35, pressure manifold 36, imbibition mouth 37 and liquid outlet 38, stock solution chamber 31 turns right from a left side and evenly sets up in support frame 1, stock solution chamber 31 is located between the adjacent indent, stock solution chamber 31 lower extreme is provided with and drips irrigation mechanism 32, 1 bilateral symmetry of support frame is provided with the drawing liquid chamber, be provided with waste liquid barrel 33 on the inner wall of drawing liquid intracavity end, be provided with drawing liquid pump 34 on the inner wall of drawing liquid chamber upper end, the symmetry is provided with imbibition mouth 37 on the inner wall of support frame 1 left and right sides both ends, be connected through contact tube 35 between drawing liquid pump 34 and the waste liquid barrel 33, be connected through pressure manifold 36 between drawing liquid pump 34 and the imbibition mouth 37, waste liquid barrel 33 rear end is provided with liquid outlet 38. One end of the collecting pipe 36 is connected with the liquid pump 34, and the other end of the collecting pipe 36 is connected with the liquid suction port 37 through a plurality of pipeline branches. The drip irrigation mechanism 32 uniformly drips the treatment liquid into the contaminated soil, and the waste liquid pumped up from the liquid suction port 37 by the liquid pump 34 is guided into the waste liquid tank 33 through the delivery pipe 35, and can be discharged from the liquid outlet 38.
The drip irrigation mechanism 32 comprises a cavity 321 to be dripped, a flow control valve 322, a drip irrigation needle tube 323, a drip irrigation port 324 and a flow limiting plate 325, the cavity 321 to be dripped is arranged at the lower end of the support frame 1, the cavity 321 to be dripped is communicated with the liquid storage cavity 31 through the flow control valve 322, the drip irrigation needle tubes 323 are uniformly arranged at the lower end of the cavity 321 to be dripped from left to right, the drip irrigation port 324 is arranged at the lower end of each drip irrigation needle tube 323, and the flow limiting plate 325 is arranged on the upper side of the inner wall of each drip irrigation needle tube 323. The shape structure of the restrictor plate 325 is a metal circular plate structure distributed over capillary holes. The flow control valve 322 controls the amount of the treatment liquid led out from the liquid storage cavity 31, the flow restriction plate 325 enables a large amount of the treatment liquid to be deposited in the cavity 321 to be dripped, the treatment liquid is uniformly and slowly dripped into the polluted soil through the flow restriction plate 325, and the treatment liquid is enabled to be more fully contacted with the polluted soil.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A chemical remediation post-treatment method for contaminated soil, which uses a soil remediation device comprising a support frame (1), a ballast unit (2) and a remediation unit (3), characterized in that: the method for treating the polluted soil by adopting the soil remediation device further comprises the following steps:
s1, erection: placing and fixing the soil remediation device above the contaminated soil in a manual or mechanical assistance manner;
s2, groove pressing operation: the cam (23) is rotated by the driving motor (21) to drive the groove pressing block (26) to repeatedly press the polluted soil, so that a plurality of liquid guide grooves are uniformly formed in the polluted soil from front to back, and the polluted soil is divided into a plurality of parts by the liquid guide grooves;
s3, drip irrigation operation: opening a liquid control valve to slowly introduce the treatment liquid into the polluted soil through a drip irrigation mechanism (32), wherein the treatment liquid reacts with chemical substances in the polluted soil to form waste liquid which flows into a liquid guide groove;
s4, recovery operation: the liquid suction pump (34) drives the liquid suction port (37) to suck the waste liquid in the liquid guide groove and guide the waste liquid into the waste liquid cylinder (33);
s5, soil taking operation: shoveling out and collecting the polluted soil which is compacted to form a liquid guide groove in a manual or mechanical auxiliary mode;
s6, test operation: sampling and detecting the repaired contaminated soil to see whether the repair of the contaminated soil is finished;
s7, processing: performing innocent treatment on the waste liquid and the polluted soil collected in the step S5;
a pressure groove unit (2) is arranged between the inner walls of the front end and the rear end of the support frame (1), and a repair unit (3) is arranged in the support frame (1);
the grooving unit (2) comprises a driving motor (21), a rotating rod (22), a rotating cam (23), a lower pressing plate (24), a sliding column (25), a grooving block (26) and an auxiliary spring (27), a driving cavity is arranged on the inner wall of the rear end of the support frame (1), the driving motor (21) is arranged on the inner wall of the rear end of the driving cavity through a motor support, the rotating rod (22) is arranged between the inner walls of the front end and the rear end of the support frame (1) through a bearing, the output end of the driving motor (21) is connected with the rear end of the rotating rod (22) through a coupler, pressing grooves are uniformly formed in the support frame (1) from front to back, the lower pressing plate (24) is connected with the pressing grooves in a sliding mode, the sliding column (25) is uniformly arranged at the lower end of the lower pressing plate (24) from left to right, the sliding column (25) is connected with the inner wall of the lower end of the pressing grooves in a sliding mode, the auxiliary spring (27) is connected between the lower pressing plate (24) and the inner wall of the lower end of the pressing grooves, the auxiliary spring (27) is sleeved on the sliding column (25), and the lower end of the sliding column (25) is provided with a pressure groove block (26);
the repair unit (3) comprises a liquid storage cavity (31), a drip irrigation mechanism (32), a waste liquid cylinder (33), a liquid pump (34), a delivery pipe (35), a collecting pipe (36), liquid suction ports (37) and a liquid outlet (38), wherein the liquid storage cavity (31) is uniformly arranged in the support frame (1) from left to right, the liquid storage cavity (31) is positioned between adjacent lower pressing grooves, the drip irrigation mechanism (32) is arranged at the lower end of the liquid storage cavity (31), the liquid suction cavities are symmetrically arranged on the left and right sides of the support frame (1), the waste liquid cylinder (33) is arranged on the inner wall at the inner end of the liquid suction cavity, the liquid pump (34) is arranged on the inner wall at the upper end of the liquid suction cavity, the liquid suction ports (37) are symmetrically arranged on the inner walls at the left and right ends of the support frame (1), the liquid suction pump (34) is connected with the waste liquid cylinder (33) through the delivery pipe (35), and the liquid suction ports (34) are connected with the collecting pipe (36), a liquid outlet (38) is arranged at the rear end of the waste liquid cylinder (33).
2. The post-treatment method for chemical remediation of contaminated soil according to claim 1, wherein: the upper end of the lower pressing plate (24) is provided with a cam groove, and the cam groove is connected with the rotating cam (23) in a sliding mode.
3. The post-treatment method for chemical remediation of contaminated soil according to claim 1, wherein: the shape of the groove pressing block (26) is an upward concave flat plate structure, and the cross section of the groove pressing block (26) is a downward convex arc-shaped surface structure.
4. The post-treatment method for chemical remediation of contaminated soil according to claim 1, wherein: one end of the collecting pipe (36) is connected with the liquid pump (34), and the other end of the collecting pipe (36) is connected with the liquid suction port (37) through a plurality of pipeline branches.
5. The post-treatment method for chemical remediation of contaminated soil according to claim 2, wherein: drip irrigation mechanism (32) including treating a chamber (321), flow control valve (322), drip irrigation needle (323), drip irrigation mouth (324) and current-limiting plate (325), treat that drip chamber (321) sets up in support frame (1) lower extreme, treat to drip through flow control valve (322) intercommunication between chamber (321) and the stock solution chamber (31), treat that drip chamber (321) lower extreme is turned right from a left side and evenly is provided with drip irrigation needle (323), drip irrigation needle (323) lower extreme is provided with and drips irrigation mouth (324), drip irrigation needle (323) inner wall upside is provided with current-limiting plate (325).
6. The chemical remediation post-treatment method for contaminated soil according to claim 5, wherein: the shape structure of the flow limiting plate (325) is a metal circular plate structure distributed all over capillary holes.
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| CN202010028544.4A CN111167850B (en) | 2020-01-11 | 2020-01-11 | Post-treatment method for chemical remediation of contaminated soil |
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| CN202010028544.4A CN111167850B (en) | 2020-01-11 | 2020-01-11 | Post-treatment method for chemical remediation of contaminated soil |
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| CN111167850B true CN111167850B (en) | 2021-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207494199U (en) * | 2017-10-12 | 2018-06-15 | 广州赛深图科学仪器有限公司 | A kind of soil remediation contaminated soil stabilizing treatment apparatus |
| CN209139477U (en) * | 2018-09-05 | 2019-07-23 | 裴凤艳 | A kind of VOCs-contaminated Soils prosthetic device |
| CN209491168U (en) * | 2018-12-27 | 2019-10-15 | 广西南宁科环环保科技有限公司 | A kind of soil restoring device |
| CN110369466A (en) * | 2019-07-25 | 2019-10-25 | 南京大学环境规划设计研究院股份公司 | A kind of prosthetic device and its application method of heavy metal cupro-nickel composite pollution soil |
-
2020
- 2020-01-11 CN CN202010028544.4A patent/CN111167850B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207494199U (en) * | 2017-10-12 | 2018-06-15 | 广州赛深图科学仪器有限公司 | A kind of soil remediation contaminated soil stabilizing treatment apparatus |
| CN209139477U (en) * | 2018-09-05 | 2019-07-23 | 裴凤艳 | A kind of VOCs-contaminated Soils prosthetic device |
| CN209491168U (en) * | 2018-12-27 | 2019-10-15 | 广西南宁科环环保科技有限公司 | A kind of soil restoring device |
| CN110369466A (en) * | 2019-07-25 | 2019-10-25 | 南京大学环境规划设计研究院股份公司 | A kind of prosthetic device and its application method of heavy metal cupro-nickel composite pollution soil |
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Effective date of registration: 20210820 Address after: 528000 Room 403, 4th floor, Xiadong credit cooperative side office building, Xiadong Industrial Zone, Guicheng Street, Nanhai District, Foshan City, Guangdong Province (residence declaration) Applicant after: Foshan City Jia Wei agricultural science and technology partnership (L.P.) Address before: 730030 Northwest University for nationalities, No.1, northwest new village, Chengguan District, Lanzhou City, Gansu Province Applicant before: Liang Hongyu |
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