CN113522963A - Device for treating coking field polluted soil through biological composting and composting method - Google Patents
Device for treating coking field polluted soil through biological composting and composting method Download PDFInfo
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- CN113522963A CN113522963A CN202110823424.8A CN202110823424A CN113522963A CN 113522963 A CN113522963 A CN 113522963A CN 202110823424 A CN202110823424 A CN 202110823424A CN 113522963 A CN113522963 A CN 113522963A
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- 239000000463 material Substances 0.000 claims abstract description 51
- 239000002912 waste gas Substances 0.000 claims abstract description 50
- 238000005273 aeration Methods 0.000 claims abstract description 36
- 239000002361 compost Substances 0.000 claims description 46
- 238000010521 absorption reaction Methods 0.000 claims description 24
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Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mycology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Toxicology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application discloses a device for treating polluted soil in a coking field by biological composting and a composting method. The device includes a tank body, a tank cover, an aeration device, a percolate collecting pipe, a percolate collecting tank, a waste gas absorbing head, a waste gas absorbing pump and a waste gas discharging port. The composting method comprises the following steps: setting a composting device, containing composting materials and continuously composting. The device and the composting method for treating the polluted soil in the coking field by the biological composting are easy to operate, simple to operate and low in cost, and can effectively treat the soil pollution caused by the coking field.
Description
Technical Field
The invention belongs to a technical device for soil remediation, and particularly relates to a device for treating contaminated soil in a coking field by biological composting and a composting method.
Technical Field
China is a large coke producing country, and the coke producing capacity is in the forefront of the world for a long time. In 2018, the coke yield in China is 4.38 million tons, the ratio is increased by 0.8% compared with the last year, and the coking capacity is also increased from 6.5 million tons in 2017 to 6.9 million tons in 2018. The coke is an important solid fuel, the calorific value of the coke is 26380-31400 kJ/kg, and the coke is mainly used for smelting steel. During the coke production process, a large amount of toxic and harmful waste water, waste gas and waste residue containing polycyclic aromatic hydrocarbon, cyanide, fluoride, petroleum hydrocarbon, heavy metal and the like can be generated, and the illegal disposal of the three wastes can cause the pollution of a coking site.
In most coke plants, the pollution is largely divided into two main categories: one is the coal dust, smoke, produced during transportation of coal and coke to a coke plant and during preparation prior to coking, such as loading, unloading, crushing and screening, which floats in the atmosphere, while the larger particles settle to the nearby soil or water. The other is harmful substances to the environment generated in the chemical processes of coking, product recovery, waste residue treatment and the like, and mainly comprises polyaromatic hydrocarbons (PAHs) such as benzo [ alpha ] pyrene, phenanthrene, naphthalene, anthracene and the like, benzene series such as benzene, toluene, ethylbenzene, xylene and the like, phenol, cyanogen, hydrosulfide and the like.
Because the coking industry has complexity, a large number of polluted sites are left, wherein most sites have complex pollution conditions and multiple pollutant types, and soil and underground water are polluted to different degrees, thus seriously threatening the human health of surrounding residents. In addition, in the re-development process of the polluted sites, when the protection measures are not sufficiently prepared and the safety protection is not in place, toxic and harmful chemical substances in the sites can be released again, so that construction personnel are exposed to harmful gas and toxic chemical substances, and the health of the construction personnel is threatened. Therefore, the method has important scientific significance for discussing the pollution characteristics of the soil, the underground water and the atmosphere of the coking field.
At present, the treatment mode of the polluted soil of the coking field mainly comprises three methods of physics, chemistry and biology. Physical methods include steam stripping techniques, thermal desorption, supercritical extraction techniques, etc., but physical remediation techniques merely transfer or separate organic contaminants from the contaminated environment and do not remove them in a true sense. But also causes pollution to other areas if the operation is improper. The chemical and biological methods are more in variety, and the treatment effect is much higher than that of the physical method. However, in the long term, the single method using a certain chemical or biological method still faces the problems of higher cost, large dosage of chemical agents, secondary pollution of soil caused by byproducts, change of soil physicochemical properties, longer treatment time and the like.
Disclosure of Invention
The invention aims to provide a device and a composting method for treating coking field polluted soil by biological composting, which can solve the problem of treating the coking field polluted soil to a certain extent, effectively remove pollutants in the soil and find a way for treating other organic pollutants in the soil.
In order to achieve the aim, the invention provides a device for treating the polluted soil of a coking field by biological composting, which comprises a tank body, a tank cover, an aeration device, a percolate collecting pipe, a percolate collecting tank, a waste gas absorbing head, a waste gas absorbing pump and a waste gas discharging port, wherein the tank cover is arranged on the tank body; the tank body is of a cylindrical tank structure, and a material storage area for containing compost materials is formed in the tank body; the cover is detachably and hermetically arranged on the tank body; the top of the tank cover is provided with a drug feeding port; the aeration device is arranged in the tank body and positioned at the bottom of the material storage area of the tank body, and the aeration device is used for introducing air and uniformly distributing the air into the compost materials; the input port of the percolate collecting pipe is arranged at the bottom of the tank body and is communicated with the material storage area; the percolate collecting pool is arranged opposite to the output port of the percolate collecting pipe and is used for collecting percolate guided by the percolate collecting pipe; the waste gas absorption head is arranged on the tank cover and corresponds to the material storage area; the waste gas absorption pump is arranged on the tank cover, and the air suction end of the waste gas absorption pump is communicated with the waste gas absorption head; the exhaust gas discharge port is communicated with the exhaust end of the exhaust gas absorption pump.
Further, the device for biologically composting the polluted soil in the coking field further comprises a temperature and humidity detector which is arranged on one side of the tank cover facing the material storage area.
Further, the device for treating the polluted soil of the coking field by the biological compost also comprises a waste gas purifier which is arranged between the waste gas absorption pump and the waste gas discharge port.
Further, the exhaust gas purifier and the percolate collecting tank are both positioned at the bottom of the tank body.
Furthermore, the device for treating the polluted soil of the coking field by using the biological compost also comprises a percolate suction port, a percolate recirculation pump, a percolate recirculation pipe and a percolate spraying head; the percolate suction port is arranged in the percolate collecting pool; the leachate recirculation pump is communicated with the leachate absorption port; the percolate return pipe is communicated to the percolate recirculation pump and extends to the tank cover; the percolate spray head is arranged on the lower surface of the tank cover and is communicated with the percolate return pipe.
Further, the aeration device comprises a plurality of aeration holes, and the aeration holes are arranged on the aeration device at intervals.
Further, the structure of the tank cover detachably and hermetically arranged on the tank body comprises a fixing bolt, a movable buckle and a hinge; the fixing bolt is arranged on the top edge of the outer side surface of the tank body; the movable buckle is arranged on the tank cover and corresponds to the fixing bolt; the hinge is connected to the tank body and the tank cover respectively, and a connecting line of the hinge and the fixing bolt is located on a symmetrical axis of the tank body.
Further, the compost materials comprise coking site polluted soil, control microbial inoculum, surfactant, animal waste and microbial inoculum; the dosage of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n15: 1; the water content of the compost material is 25-35%.
Further, the microbial inoculum comprises strains belonging to one or more of the genera Methylobacterium, Burkholderia, Rhodococcus, Chryseobacterium and Microbacterium.
The invention also provides a composting method, which comprises the following steps:
a composting device is arranged, and the device for treating the polluted soil of the coking field by biological composting is arranged;
a compost material containing step of containing compost materials in the device for biologically composting the polluted soil of the coking field; the compost materials comprise coking site polluted soil, a control microbial inoculum, a surfactant, animal waste and a microbial inoculum; the dosage of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n15: 1; the water content of the compost material is 25-35%; the bacterial agent comprises bacterial strains belonging to one or more of the genus Methylobacterium, the genus Burkholderia, the genus Rhodococcus, the genus Chryseobacterium and the genus Microbacterium; and
A continuous composting step, namely performing intermittent aeration on the compost by using an aeration device, and continuously aerating for 10-30 minutes per hour; monitoring the temperature and the moisture content change in the stack body in real time through a temperature and humidity detector, starting a leachate reflux pump when the moisture content of the stack body is lower than 25-35%, spraying leachate on the surface of the stack body through a spray head until the moisture content of the stack body is higher than 25-35%, and stopping spraying; waste gas generated in the composting process is purified by a waste gas treatment device and then is discharged through a waste gas discharge port; and (3) continuously operating for 15-20 days at 30 ℃ to finish the compost degradation of the polluted soil.
Compared with the prior art, the device and the composting method for treating the polluted soil in the coking field by using the biological compost are easy to operate, simple to operate and low in cost, and can effectively treat the soil pollution caused by the coking field.
Drawings
FIG. 1 is a schematic structural view of an apparatus for bio-composting contaminated soil of a coking site according to the present invention;
FIG. 2 is a plan view of the bottom aeration apparatus of the composting apparatus of the invention;
FIG. 3 is a flow diagram of the composting method of the invention.
Identification in the legend: the device comprises a fixing bolt 1, a movable buckle 2, a tank cover 3, a waste gas absorption pump 4, a waste gas conveying pipe 5, a waste gas absorption head 6, a leachate spraying head 7, a hinge 8, a temperature and humidity detector 9, a leachate backflow pipe 10, a material storage area 11, an aeration hole 12, a leachate backflow pump 13, a waste gas purifier 14, a waste gas discharge port 15, a leachate absorption opening 16, a leachate collecting pipe 17, a dosing opening 18, a tank body 19, an aeration device 20, a leachate guiding pipe 21 and a leachate collecting tank 22.
Detailed Description
The invention is described in greater detail below with reference to an exemplary embodiment and with reference to the drawings.
As shown in fig. 1 and 2, the structure of the device for biologically composting contaminated soil of a coking field according to the present invention comprises: the device comprises a tank cover 3, a percolate spraying head 7, a temperature and humidity detector 9, a material storage area 11, a waste gas purifier 14, a percolate collecting pipe 17, a tank body 19 and an aeration device 20. The tank body 19 of the composting device is of a cylindrical tank structure, and the bottom surface of the tank body made of acid-resistant steel plates is surrounded by a cylindrical structure with the diameter of 5m and the height of 7.5 m; the composting device is provided with a portable temperature and humidity detector 9 so as to monitor the temperature and the moisture content change in the compost body in real time; the composting device is provided with an aeration device 20, the aeration amount and the aeration time in the composting process are adjusted through external control, and the bottom of the composting device is provided with an aeration port 12 so as to uniformly distribute introduced air into the composting materials; the bottom of the composting device is provided with a percolate collecting pipe 17 which is uniformly distributed and flows into a percolate collecting tank 22 through a percolate guide pipe 21 at the lower part; the leachate collecting pool is made of acid and alkali resistant plastic and used for storing leachate generated in the composting process; the composting device is also provided with a percolate suction inlet 16 、 Percolate recirculation pump 13 and percolate recirculation pipe 10、A percolate recovery device consisting of a percolate sprinkler head 7, so that percolate generated at the initial stage of composting and collected in a percolate collecting tank 22 flows into a percolate return pipe 10 under the action of a percolate recirculation pump 13 and is sprayed to the surface of a heap body through the percolate sprinkler head 7 to adjust the water content of the heap body; the composting device is also provided with a waste gas absorption pump 4 which absorbs waste gas generated in the composting process through a waste gas absorption head 6, and the waste gas is sent into a waste gas purifier 14 through a waste gas conveying pipe 5 for purification and then is discharged through a waste gas discharge port 15.
Specifically, a cavity for containing compost materials is formed in the tank body 19 and serves as a material storage area 11; the tank cover 3 is detachably and hermetically arranged on the tank body 19; the top of the tank cover 3 is provided with a drug feeding port 18; the aeration device 20 is arranged in the tank body 19 and positioned at the bottom of the material storage area 11 of the tank body 19, and the aeration device 20 is used for introducing air and uniformly distributing the air into the compost materials; the input port of the percolate collecting pipe 17 is arranged at the bottom of the tank body 19 and is communicated with the material storage area 11; the percolate collecting tank 22 is arranged opposite to the output port of the percolate collecting pipe 17 and is used for collecting percolate guided by the percolate collecting pipe 17; the waste gas absorbing head 6 is arranged on the tank cover 3 and corresponds to the material storage area 11; the waste gas absorption pump 4 is arranged on the tank cover 3, and the air suction end of the waste gas absorption pump is communicated with the waste gas absorption head 6; the exhaust gas discharge port 15 communicates with the exhaust end of the exhaust gas absorption pump 4. The temperature and humidity detector 9 is arranged on one side of the tank cover 3 facing the material storage area 11. The exhaust gas cleaner 14 is provided between the exhaust gas absorption pump 4 and the exhaust gas discharge port 15. The exhaust gas cleaner 14 and the leachate collection tank 22 are both located at the bottom of the tank body, so that the space can be reasonably utilized.
From the percolate suction opening 16、 Percolate recirculation pump 13 and percolate recirculation pipe 10、In the percolate recovery device consisting of the percolate spraying head 7, the percolate suction opening 16 is arranged in the percolate collecting tank 22; the leachate recirculation pump 13 is communicated with the leachate suction port 16; the percolate return pipe 10 is communicated to the percolate return pump 13 and extends toThe tank cover 3; the percolate spray head 7 is arranged on the lower surface of the tank cover 3 and is communicated with the percolate return pipe 10.
As shown in fig. 2, the aeration device 20 includes a plurality of aeration holes 12, and the aeration holes 12 are arranged at intervals on the aeration device 20.
The composting device provided by the invention is sealed to ensure the tightness. The structure of the tank cover 3 which is detachably and hermetically arranged on the tank body 19 comprises a fixed bolt 1, a movable buckle 2 and a hinge 8; the fixing bolt 1 is arranged on the top edge of the outer side surface of the tank body 19; the movable buckle 2 is arranged on the tank cover 3 and corresponds to the fixing bolt 1; the hinge 8 is respectively connected to the tank body 19 and the tank cover 3, and a connecting line of the hinge 8 and the fixing bolt 1 is located on a symmetrical axis of the tank body 19.
The compost materials comprise coking site polluted soil, a control microbial inoculum, a surfactant, animal waste and a microbial inoculum; the dosage of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n15: 1; the water content of the compost material is 25-35%.
The microbial inoculum related by the invention is screened from soil in a certain coking field by using polycyclic aromatic hydrocarbon as a unique carbon source and utilizing an enrichment culture technology. As a result of 16sDNA sequencing of the strains, the experimental strains were found to belong to the following 5 strains Methylobacterium (Methylobacterium), Burkholderia (Burkholderia), Rhodococcus (Rhodococcus), Chryseobacterium (Chryseobacterium), Microbacterium (Microbacterium).
As shown in FIG. 3, the present invention also provides a composting method comprising the following steps S1-S3:
s1, setting a composting device, namely setting the device for biologically composting the polluted soil of the coking field;
s2, containing compost materials, namely containing the compost materials in the device for treating the polluted soil of the coking field by using the biological compost; the compost materials comprise coking site polluted soil, a control microbial inoculum, a surfactant, animal waste and a microbial inoculum; the dosage of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n15: 1; the water content of the compost material is 25-35%; the bacterial agent comprises bacterial strains belonging to one or more of the genus Methylobacterium, the genus Burkholderia, the genus Rhodococcus, the genus Chryseobacterium and the genus Microbacterium; and
S3, continuously composting, namely intermittently aerating the compost by utilizing an aeration device, and continuously aerating for 10-30 minutes per hour; monitoring the temperature and the moisture content change in the stack body in real time through a temperature and humidity detector, starting a leachate reflux pump when the moisture content of the stack body is lower than 25-35%, spraying leachate on the surface of the stack body through a spray head until the moisture content of the stack body is higher than 25-35%, and stopping spraying; waste gas generated in the composting process is purified by a waste gas treatment device and then is discharged through a waste gas discharge port; and (3) continuously operating for 15-20 days at 30 ℃ to finish the compost degradation of the polluted soil.
When the device for treating the polluted soil in the coking field by using the biological compost is used, the strains screened out by experiments are mixed with the soil which is subjected to controllable pre-oxidation treatment, and the adding amount of the microbial inoculum is controlled to be 10% of the soil; 755mg/Kg of rhamnolipid surfactant; c is adjusted by adding other animal wastes (pig manure and chicken manure): n15: 1; controlling the water content to be 32.5%; the compost materials are uniformly mixed through a bag turning machine and are placed in a material storage area of a composting device. The aeration device is used for carrying out intermittent aeration on the stack body, and the aeration is continuously carried out for 10 minutes per hour. Through temperature moisture detector real-time supervision heap body in temperature and moisture content change, when the heap body moisture content is less than 35%, start leachate reflux pump 13, spray the leachate on the heap body surface through the shower nozzle, until the heap body moisture content is higher than 35%, stop spraying: waste gas generated in the composting process is absorbed by a waste gas treatment device and is purified and discharged through a bottom exhaust port. After continuous operation for 21 days at 30 ℃, polycyclic aromatic hydrocarbon in the polluted soil in the composting device is degraded under the action of aerobic microorganisms in the compost.
Compared with the prior art, the device and the composting method for treating the polluted soil in the coking field by using the biological compost are easy to operate, simple to operate and low in cost, and can effectively treat the soil pollution caused by the coking field.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The device and the composting method for biologically composting polluted soil in a coking field provided by the embodiment of the application are introduced in detail, the principle and the implementation mode of the application are explained by applying specific examples, and the description of the embodiment is only used for helping to understand the technical scheme and the core thought of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. The utility model provides a device of contaminated soil in bio-compost processing coking yard which characterized in that includes:
The tank body is of a cylindrical tank structure, and a material storage area for containing compost materials is formed in the tank body;
the cover is detachably and hermetically arranged on the tank body; the top of the tank cover is provided with a drug feeding port;
the aeration device is arranged in the tank body and positioned at the bottom of the material storage area of the tank body, and the aeration device is used for introducing air and uniformly distributing the air into the compost materials;
the input port of the percolate collecting pipe is arranged at the bottom of the tank body and is communicated with the material storage area;
the percolate collecting pool is arranged opposite to the output port of the percolate collecting pipe and is used for collecting percolate guided by the percolate collecting pipe;
the waste gas absorption head is arranged on the tank cover and corresponds to the material storage area;
the waste gas absorption pump is arranged on the tank cover, and the air suction end of the waste gas absorption pump is communicated with the waste gas absorption head; and
and the exhaust gas discharge port is communicated with the exhaust end of the exhaust gas absorption pump.
2. An apparatus as claimed in claim 1, further comprising a temperature and humidity detector disposed on a side of said tank cover facing said material storage area.
3. An apparatus for bio-composting contaminated soil from a coking site as claimed in claim 1, further comprising:
And the waste gas purifier is arranged between the waste gas absorption pump and the waste gas discharge port.
4. An apparatus as claimed in claim 3, wherein the waste gas cleaner and the percolate collection tank are both located at the bottom of the tank.
5. An apparatus for bio-composting contaminated soil from a coking site as claimed in claim 1, further comprising:
the percolate suction port is arranged in the percolate collecting pool;
the leachate recirculation pump is communicated with the leachate absorption port;
the leachate return pipe is communicated to the leachate recirculation pump and extends to the tank cover; and
and the percolate spraying head is arranged on the lower surface of the tank cover and communicated with the percolate return pipe.
6. An apparatus as claimed in claim 1, wherein the aeration means includes a plurality of aeration holes, and the aeration holes are arranged at intervals on the aeration means.
7. An apparatus for bio-composting contaminated soil from a coking site as claimed in claim 1, wherein the structure of the lid removably and sealingly attached to the tank body comprises:
The fixing bolt is arranged on the top edge of the outer side surface of the tank body;
the movable buckle is arranged on the tank cover and corresponds to the fixing bolt; and
the hinge is connected to the tank body and the tank cover respectively, and a connecting line of the hinge and the fixing bolt is located on a symmetrical axis of the tank body.
8. An apparatus for bio-composting contaminated soil from a coking site as claimed in claim 1, wherein the compost material includes contaminated soil from a coking site, a control microbial inoculum, a surfactant, animal waste and a microbial inoculum; the adding amount of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n = 15: 1; the water content of the compost material is 25-35%.
9. An apparatus for bio-composting contaminated soil from a coking yard according to claim 8 wherein said microbial inoculum comprises strains belonging to one or more of the genera Methylobacterium, Burkholderia, Rhodococcus, Chryseobacterium, Microbacterium.
10. A method of composting, comprising the steps of:
A composting device setting step of setting a device for biologically composting contaminated soil of a coking site according to claim 1;
a compost material containing step of containing compost materials in the device for biologically composting the polluted soil of the coking field; the compost materials comprise coking site polluted soil, a control microbial inoculum, a surfactant, animal waste and a microbial inoculum; the adding amount of the control microbial inoculum is 10-20% of the soil polluted by the coking field; the adding amount of the surfactant in the compost material is 500-1000 mg/Kg; the animal waste regulates C: n = 15: 1; the water content of the compost material is 25-35%; the bacterial agent comprises bacterial strains belonging to one or more of the genus Methylobacterium, the genus Burkholderia, the genus Rhodococcus, the genus Chryseobacterium and the genus Microbacterium; and
a continuous composting step, namely performing intermittent aeration on the compost by using an aeration device, and continuously aerating for 10-30 minutes per hour; monitoring the temperature and the moisture content change in the stack body in real time through a temperature and humidity detector, starting a leachate reflux pump when the moisture content of the stack body is lower than 25-35%, spraying leachate on the surface of the stack body through a spray head until the moisture content of the stack body is higher than 25-35%, and stopping spraying; waste gas generated in the composting process is purified by a waste gas treatment device and then is discharged through a waste gas discharge port; and (3) continuously operating for 15-20 days at 30 ℃ to finish the compost degradation of the polluted soil.
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CN108655162A (en) * | 2018-06-06 | 2018-10-16 | 辽宁石油化工大学 | A kind of method of restoring soil with serious petroleum pollution |
CN208266082U (en) * | 2018-04-10 | 2018-12-21 | 沈阳光大环保科技股份有限公司 | Garbage compost processing equipment |
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CN203602517U (en) * | 2013-12-09 | 2014-05-21 | 沈阳大学 | Aerobic composting device for organic polluted soil |
DE202014006208U1 (en) * | 2014-07-30 | 2014-08-13 | Bauer Umwelt Gmbh | Drilling device for creating a well in contaminated soil |
CN208266082U (en) * | 2018-04-10 | 2018-12-21 | 沈阳光大环保科技股份有限公司 | Garbage compost processing equipment |
CN108655162A (en) * | 2018-06-06 | 2018-10-16 | 辽宁石油化工大学 | A kind of method of restoring soil with serious petroleum pollution |
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