CN212168512U - Microorganism-plant combined mineralized refuse remediation system - Google Patents
Microorganism-plant combined mineralized refuse remediation system Download PDFInfo
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- CN212168512U CN212168512U CN202020654273.9U CN202020654273U CN212168512U CN 212168512 U CN212168512 U CN 212168512U CN 202020654273 U CN202020654273 U CN 202020654273U CN 212168512 U CN212168512 U CN 212168512U
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Abstract
The utility model belongs to the refuse treatment field to specifically disclose a mineralize mineralization rubbish repair system that microorganism-plant are united, it includes rubbish storage unit, rubbish screening unit, pressurization filtration irrigation unit, phytoremediation unit, wherein: the garbage screening unit is used for screening the garbage dug out from the garbage storage unit to obtain mineralized garbage polluted by heavy metals; the pressure filtration irrigation unit is used for carrying out microorganism restoration on mineralized refuse and comprises a filtration irrigation device, a first pressure device, a second pressure device and a filtration liquid collecting and processing device, wherein the first pressure device and the second pressure device are both communicated with the filtration irrigation device, and the filtration liquid collecting and processing device is arranged below the filtration irrigation; the phytoremediation unit is used for phytoremediation of the mineralized waste. The utility model discloses can realize that microorganism-plant unites to restoreing heavy metal in the mineralized refuse, and equipment is simple, easy and simple to handle, the effect is showing, low cost, has realized mineralized refuse resource utilization.
Description
Technical Field
The utility model belongs to the field of refuse treatment, more specifically relates to a mineralized refuse repair system that microorganism-plant are united.
Background
Municipal domestic waste in China is mainly treated by sanitary landfill, the landfill time of a landfill site is long, the occupied area is large, the area of the landfill site is continuously enlarged along with the continuous increase of the waste yield, and the land use cost is gradually increased due to the expansion of urban areas, so that the sustainable utilization of the sanitary landfill site and the resource utilization of the waste are urgently realized.
The fine particles obtained by screening and after the urban domestic garbage in the garbage landfill reaches a stable state after being degraded for many years are mineralized garbage. The contents of nitrogen, phosphorus, organic matters and the like in the mineralized garbage are higher than those of common soil, and the mineralized garbage has better physical properties and stronger adsorption capacity, and the good properties determine the diversified utilization ways of the mineralized garbage. Research shows that the mineralized refuse can be applied to landscaping, farmlands, fruit trees and restoration and improvement of damaged soil. The mineralized refuse fine granules are used for planting and culturing plants such as the zephyranthes candida and the cinnamomum camphora, and the mineralized refuse has additional economic benefits, so that the mineralized refuse is used as greening soil and is an important way for resource utilization of the mineralized refuse.
Sampling analysis is carried out on different refuse landfills, and the result shows that the refuse landfills have the problem that the heavy metal content exceeds the standard to different degrees. As landfill time increases, the degree of heavy metal contamination increases. In addition, the problems of heavy metal pollution of soil bodies are increasingly serious due to the phenomena of abuse of chemical agents, factory pollution and the like, so that the heavy metal in the mineralized refuse is required to be repaired in the resource utilization process of the mineralized refuse so as to prevent the heavy metal from causing secondary pollution to farmlands and garden lands.
The existing remediation method applied to the heavy metals in the mineralized refuse mainly comprises a chemical leaching method and a stable curing remediation method. The chemical leaching method is to select proper leacheate to clean the polluted mineralized refuse so as to achieve the aim of removing heavy metals, but the technology has high requirements on the soil texture, is not suitable for many places in China, and can cause secondary pollution; the stable solidification repair method utilizes passivators such as lime, power plant ash and iron manganese oxide to reduce the migration of heavy metals, but the heavy metals which are retained in soil and passivated still can cause secondary pollution after several years. Therefore, a heavy metal remediation method with good treatment effect, simple operation and small disturbance on the mineralized refuse is urgently needed.
SUMMERY OF THE UTILITY MODEL
To the above defect or improvement demand of prior art, the utility model provides a mineralized refuse repair system that microorganism-plant unite, its aim at realizes through repair system that microorganism repair technique and plant repair technique unite and carry out repairing to heavy metal in the mineralized refuse, and overall structure is simple, easy and simple to handle, the effect is showing, low cost, and has realized mineralized refuse resource utilization.
In order to achieve the above object, the present invention provides a microorganism-plant combined mineralized refuse repair system for implementing the above method, comprising a refuse storage unit, a refuse screening unit, a pressurizing filtration irrigation unit, and a plant repair unit, wherein:
the garbage screening unit is used for screening the garbage dug out from the garbage storage unit to obtain mineralized garbage polluted by heavy metals;
the pressure filtration irrigation unit is used for carrying out microbial remediation on mineralized refuse and comprises a filtration irrigation device, a first pressure device, a second pressure device and a percolate collecting and processing device, wherein the filtration irrigation device comprises an outer wall of the filtration irrigation device and an inner ring of the filtration irrigation device arranged in the outer wall, two layers of permeable metal plates are arranged at the upper part of the inner ring of the filtration irrigation device, permeable stones are arranged between the two layers of permeable metal plates, and filter cloth, the permeable stones and the permeable metal plates are sequentially arranged at the lower part of the inner ring of the filtration irrigation device from top to bottom; the first pressurizing device and the second pressurizing device are both communicated with the infiltrating irrigation device, and the percolate collecting and treating device is arranged below the infiltrating irrigation device;
the phytoremediation unit is used for phytoremediation of the mineralized waste and comprises closed greening land and plants planted in the closed greening land.
Preferably, the first pressurizing device comprises a first air pressure controller and a first high-pressure water storage tank which are connected, the second pressurizing device comprises a second air pressure controller and a second high-pressure water storage tank which are connected, and the first high-pressure water storage tank and the second high-pressure water storage tank are both communicated with the infiltrating irrigation device.
More preferably, the range of the first air pressure controller and the second air pressure controller is 2Mpa, and the precision is 0.15%; the working pressure of the first high-pressure water storage tank and the working pressure of the second high-pressure water storage tank are 2.5Mpa, and the volume of the first high-pressure water storage tank and the volume of the second high-pressure water storage tank are 1m3。
As a further preference, the volume of the infiltrating irrigation device is not less than 3m3。
Preferably, the first high-pressure water storage tank contains OD6001.0 of the Bacillus basophilus strain.
More preferably, the second high-pressure water storage tank contains a reaction solution, and the reaction solution is a mixed solution of 1mol/L urea and 1mol/L calcium chloride.
Preferably, the plants are selected according to the types of heavy metals in the mineralized refuse, wherein the mineralized refuse polluted by zinc and cadmium is selected from vetiver and sedum alfredii hance, the mineralized refuse polluted by chromium is selected from Leersia hexandra, and the mineralized refuse polluted by copper is selected from festuca arundinacea and Trifolium repens.
Generally, through the utility model above technical scheme who thinks compares with prior art, mainly possesses following technical advantage:
1. the utility model is provided with the pressurizing and infiltrating irrigation unit and the plant repairing unit to carry out microorganism-plant combined repairing on the heavy metals in the mineralized refuse; the pressurized infiltrating irrigation unit carries out microbial remediation, namely free heavy metals in soil are effectively reduced by utilizing microbial precipitation and adsorption, the phytoremediation unit effectively reduces the mobility and bioavailability of the heavy metals in the soil by plant extraction, plant volatilization, plant stabilization and root filtration, and purifies and removes the heavy metals in the soil, and meanwhile, the phytoremediation unit solves the resource utilization problem of mineralized refuse, and the planted plants have certain economic value.
2. Compared with the existing chemical leaching method and the stable curing restoration method, the utility model has low requirement on the soil texture, and the heavy metal is restored thoroughly, so that the secondary pollution to the mineralized garbage is avoided; in addition, the utility model discloses equipment is simple, easy and simple to handle, low cost, and friendly to the environment, and is less to mineralize mineralization rubbish and soil body structure modification.
3. The utility model designs the infiltrating irrigation device specifically, which improves the sedimentation and adsorption effects when the microorganisms restore the mineralized garbage; meanwhile, when the plants are repaired, the plants are selected according to the heavy metal category in the mineralized refuse so as to pertinently remove the heavy metals in the soil body.
Drawings
FIG. 1 is a schematic view of a system for repairing mineralized waste by combining microorganisms and plants according to an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the filtration irrigation device according to the embodiment of the present invention;
FIG. 3 is a flow chart of the method for repairing mineralized refuse by combining microorganism and plant according to the embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-a garbage storage unit; 2-a garbage screening unit; 3-a pressurized infiltrating irrigation unit; 4-a phytoremediation unit; 5-a refuse landfill; 6, screening machine; 7-infiltrating irrigation equipment; 8 a-a first air pressure controller; 8 b-a second air pressure controller; 9 a-a first high-pressure water storage tank; 9 b-a high-pressure water storage tank II; 10-a percolate collecting and treating device; 11-a plant; 12-sealing greening land; 13-infiltrating irrigation equipment outer wall; 14-permeable stone; 15-inner ring of infiltrating irrigation device; 16-filter cloth; 17-water permeable metal plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the utility model provides a mineralize mineralization rubbish repair system that microorganism-plant are united, as shown in fig. 1, including rubbish storage unit 1, rubbish screening unit 2, pressurization filtration irrigation unit 3, phytoremediation unit 4, wherein:
the garbage storage unit 1 comprises a garbage landfill 5 for storing and degrading municipal solid waste;
the garbage screening unit 2 comprises a screening machine 6 for screening the garbage dug out from the garbage landfill 5 to obtain mineralized garbage polluted by heavy metals;
the pressurized infiltrating irrigation unit 3 is used for carrying out microbial remediation on mineralized refuse and comprises an infiltrating irrigation device 7, a first pressurizing device, a second pressurizing device and a percolate collecting and processing device 10, wherein as shown in figure 2, the infiltrating irrigation device 7 comprises an infiltrating irrigation device outer wall 13 and an infiltrating irrigation device inner ring 15 installed inside the infiltrating irrigation device outer wall, two layers of permeable metal plates 17 are arranged on the upper portion of the infiltrating irrigation device inner ring 15, permeable stones 14 are arranged between the two layers of permeable metal plates 17, and filter cloth 16, the permeable stones 14 and the permeable metal plates 17 are sequentially arranged on the lower portion of the infiltrating irrigation device inner ring 15 from top to bottom; the first pressurizing device comprises a first air pressure controller 8a and a first high-pressure water storage tank 9a which are connected, the second pressurizing device comprises a second air pressure controller 8b and a second high-pressure water storage tank 9b which are connected, and the first high-pressure water storage tank 9a and the second high-pressure water storage tank 9b are both communicated with the infiltrating irrigation device 7; the percolate collecting and treating device 10 is arranged below the infiltrating irrigation device 7 and is a simple sewage treatment tank;
the phytoremediation unit 4 is used for phytoremediation of the mineralized waste and comprises a closed greening land 12 and plants 11 planted in the closed greening land 12.
Preferably, the range of the first air pressure controller 8a and the second air pressure controller 8b is 2Mpa, and the precision is 0.15%; the working pressure of the first high-pressure water storage tank 9a and the working pressure of the second high-pressure water storage tank 9b are 2.5Mpa, and the volume of the high-pressure water storage tanks is 1m3(ii) a The volume of the infiltrating irrigation device 7 is not less than 3m3。
When the system is used for repairing the mineralized garbage containing heavy metals, as shown in fig. 3, the method comprises the following steps:
s1, excavating and screening the refuse landfill to obtain mineralized refuse polluted by heavy metals, and placing the mineralized refuse in a percolating and filling device; specifically, the mineralized refuse is placed in the infiltrating irrigation device by natural accumulation, and when the mineralized refuse approaches the top of the inner ring of the infiltrating irrigation device, the mineralized refuse is properly leveled.
S2, sequentially injecting bacillus basophilus liquid and reaction liquid into the infiltrating irrigation device; specifically, the first high-pressure water storage tank holds OD6001.0 of bacillus pasteuris liquid, and a mixed solution of 1mol/L urea and 1mol/L calcium chloride is contained in the high-pressure water storage tank II to be used as a reaction solution; firstly, injecting the bacillus basophilus solution in a first high-pressure water storage tank into an infiltration filling device through a first air pressure controller, stopping injecting after air in the infiltration filling device is exhausted, standing for 30min, and discharging infiltration filtrate in a natural state; and injecting the reaction liquid in the high-pressure water storage tank II into the infiltration filling device through a second air pressure controller, stopping injecting the reaction liquid after air in the infiltration filling device is exhausted, standing for 8 hours, discharging infiltration filtrate in a pressurized state, discharging all the infiltration filtrate from the infiltration filling device into an infiltration filtrate collecting and treating device, and treating sewage according to pollution conditions.
S3 repeating S2 times, preferably 2 times, to make the heavy metal in the mineralized refuse fully react with the bacillus basophilus liquid.
S4, taking out the mineralized refuse, transferring the mineralized refuse to a closed greening land, planting plants in the closed greening land, and removing the plants after a certain period of time to complete the restoration of the mineralized refuse; specifically, the plants are selected according to the heavy metal category in the mineralized refuse, wherein the mineralized refuse polluted by zinc and cadmium is selected from vetiver grass and sedum alfredii hance, the mineralized refuse polluted by chromium is selected from Leersia hexandra, and the mineralized refuse polluted by copper is selected from festuca arundinacea and Trifolium repens; the planting time is selected according to specific plants, the vetiver grass is planted for 30 days, the sedum alfredii is planted for 180 days, the Leersia hexandra is planted for 120 days, the tall fescue is planted for 50 days, and the Trifolium repens has ecological ornamental value and can be planted continuously.
Further, after S3 is finished, 3 parts of the mineralized waste on the upper part, the middle part and the lower part of the infiltrating irrigation device are respectively taken as soil samples to be detected, the weight of each soil sample is 1kg, then, heavy metals in the soil samples to be detected are extracted and detected by a toxicity leaching method, and the heavy metal pollution condition is evaluated by comparing the heavy metal pollution condition with a limit value in a specification.
Further, after the mineralized refuse is repaired by S4, a soil sample to be detected is taken from the closed greening land by an S-shaped point distribution method, heavy metals in the soil sample to be detected are extracted and detected by a toxicity leaching method, and the heavy metal pollution condition is evaluated by comparing the extracted heavy metals with a limit value in a specification.
The following are specific examples:
the method for repairing the mineralized refuse in a certain refuse landfill after 10 years of sealing comprises the following steps:
(1) mining the mineralized waste in the refuse landfill by an empirical method, and screening by a screening machine to obtain the mineralized waste polluted by heavy metals.
(2) Culturing Bacillus pasteurii, mixing the mother liquor with nutrient solution (20g/L yeast extract, 10g/L ammonium chloride, 10mg/L manganese sulfate monohydrate, 24mg/L nickel chloride hexahydrate, 1mol/L sodium hydroxide solution to adjust pH to 8.5) at a ratio of 1:100, culturing at 30 deg.C and 160rpm for 24h to obtain bacterial solution OD600Is 1.0; preparing 1mol/L mixed reaction liquid of urea and calcium chloride.
(3) And (3) putting the mineralized refuse polluted by heavy metals into an infiltration irrigation device, adopting natural stacking placement when the mineralized refuse is placed, and properly leveling when the soil sample is close to the top of the inner ring of the pressurization infiltration irrigation device.
(4) And a pasteurella bacteria liquid and a reaction liquid are respectively added into the first high-pressure water storage tank 9a and the second high-pressure water storage tank 9 b.
(5) Closing a drain valve of the infiltration irrigation device 7, opening a water inlet valve, an exhaust valve and a valve of a high-pressure water storage tank I9 a of the infiltration irrigation device 7, adjusting a pressurization controller I8 a to be 1Mpa, continuously injecting bacterial liquid, stopping injecting liquid after air in the infiltration irrigation device is completely exhausted, standing for 30min, opening a drain valve of the infiltration irrigation device 7, and discharging infiltration liquid in a natural state.
(6) Closing the drain valve of the infiltrating irrigation device 7, opening the valve of the high-pressure water storage tank II 9b, adjusting the pressure controller II 8b to be 1Mpa, continuously injecting the reaction liquid, stopping injecting the liquid after the air in the infiltrating irrigation device is completely exhausted, standing for 8h, then opening the drain valve of the infiltrating irrigation device 7, and discharging the infiltrating filtrate in a pressurized state.
(7) Repeating the steps (5) and (6) for 2 times.
(8) And (3) taking out the mineralized refuse, respectively taking 3 parts of soil samples at the upper part, the middle part and the lower part of the infiltrating irrigation device, wherein each part of soil sample is 1kg, detecting the concentration of heavy metals in the soil samples by a toxicity leaching method, and comparing the concentration with the specification to know that the concentrations of heavy metals zinc, cadmium and chromium in the mineralized refuse are all lower than the specification limit value and the concentration of heavy metal copper is higher than the specification limit value.
(9) Transferring the mineralized refuse subjected to primary treatment to a closed greening land, planting festuca arundinacea for 50 days, removing plants, taking a soil sample to be detected by an S-shaped point distribution method, detecting the concentration of heavy metal in the soil sample by a toxicity leaching method, and comparing the concentration of heavy metal copper in the mineralized refuse with a standard to know that the concentration of heavy metal copper in the mineralized refuse is lower than a standard limit value.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a mineralize mineralization rubbish repair system that microorganism-plant are united, its characterized in that includes rubbish memory cell (1), rubbish screening unit (2), pressurization filtration irrigation unit (3), phytoremediation unit (4), wherein:
the garbage screening unit (2) is used for screening the garbage dug out from the garbage storage unit (1) to obtain mineralized garbage polluted by heavy metals;
the pressurized infiltrating irrigation unit (3) is used for carrying out microbial remediation on mineralized refuse and comprises an infiltrating irrigation device (7), a first pressurizing device, a second pressurizing device and a percolate collecting and treating device (10), wherein the infiltrating irrigation device (7) comprises an infiltrating irrigation device outer wall (13) and an infiltrating irrigation device inner ring (15) installed inside the infiltrating irrigation device outer wall, two layers of permeable metal plates are arranged on the upper portion of the infiltrating irrigation device inner ring (15), permeable stones are arranged between the two layers of permeable metal plates, and filter cloth, the permeable stones and the permeable metal plates are sequentially arranged on the lower portion of the infiltrating irrigation device inner ring (15) from top to bottom; the first pressurizing device and the second pressurizing device are both communicated with the infiltrating irrigation device (7), and the percolate collecting and treating device (10) is installed below the infiltrating irrigation device (7);
the phytoremediation unit (4) is used for phytoremediation of the mineralized waste and comprises a closed greening land (12) and plants (11) planted in the closed greening land (12).
2. The microorganism-plant combined mineralized refuse restoration system according to claim 1, wherein the first pressurization device comprises a first air pressure controller (8a) and a first high pressure water storage tank (9a) connected to each other, the second pressurization device comprises a second air pressure controller (8b) and a second high pressure water storage tank (9b) connected to each other, and both the first high pressure water storage tank (9a) and the second high pressure water storage tank (9b) are communicated with the infiltrating irrigation device (7).
3. The system for remediating mineralized waste by combining microorganisms and plants according to claim 2, wherein the range of the first air pressure controller (8a) and the second air pressure controller (8b) is 2Mpa, and the accuracy is 0.15%; the working pressure of the first high-pressure water storage tank (9a) and the second high-pressure water storage tank (9b) is 2.5Mpa, and the volume is 1m3。
4. A system for the microbial-plant combined remediation of mineralized waste according to claim 1, wherein the volume of the infiltrating irrigation device (7) is not less than 3m3。
5. The system for remediating mineralized waste by combining microorganisms and plants according to claim 2, wherein the first high-pressure water storage tank (9a) contains OD6001.0 of the Bacillus basophilus strain.
6. The system for remedying the mineralized waste by combining the microorganisms and the plants according to claim 2, wherein a reaction solution is contained in the second high-pressure water storage tank (9b), and the reaction solution is a mixed solution of 1mol/L urea and 1mol/L calcium chloride.
7. The system for remediating mineralized waste by combining microorganisms and plants according to any one of claims 1 to 6, wherein the plants are selected according to the types of heavy metals in the mineralized waste, wherein the mineralized waste contaminated by zinc and cadmium is selected from vetiver and sedum alfredii, the mineralized waste contaminated by chromium is selected from Leersia hexandra, and the mineralized waste contaminated by copper is selected from festuca arundinacea and Trifolium repellanthi.
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| CN202020654273.9U CN212168512U (en) | 2020-04-26 | 2020-04-26 | Microorganism-plant combined mineralized refuse remediation system |
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